CN112401355A - A temperature-sensing and temperature-regulating isolation gown - Google Patents
A temperature-sensing and temperature-regulating isolation gown Download PDFInfo
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- CN112401355A CN112401355A CN202011138454.7A CN202011138454A CN112401355A CN 112401355 A CN112401355 A CN 112401355A CN 202011138454 A CN202011138454 A CN 202011138454A CN 112401355 A CN112401355 A CN 112401355A
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- 238000002955 isolation Methods 0.000 title claims abstract description 43
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 78
- PAWQVTBBRAZDMG-UHFFFAOYSA-N 2-(3-bromo-2-fluorophenyl)acetic acid Chemical compound OC(=O)CC1=CC=CC(Br)=C1F PAWQVTBBRAZDMG-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000010410 layer Substances 0.000 claims description 27
- 239000000017 hydrogel Substances 0.000 claims description 23
- 239000000499 gel Substances 0.000 claims description 21
- 239000011229 interlayer Substances 0.000 claims description 10
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 claims description 8
- 239000011347 resin Substances 0.000 claims description 8
- 229920005989 resin Polymers 0.000 claims description 8
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 claims description 8
- 229920000881 Modified starch Polymers 0.000 claims description 7
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 7
- QNILTEGFHQSKFF-UHFFFAOYSA-N n-propan-2-ylprop-2-enamide Chemical compound CC(C)NC(=O)C=C QNILTEGFHQSKFF-UHFFFAOYSA-N 0.000 claims description 7
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 7
- 238000007710 freezing Methods 0.000 claims description 5
- 230000008014 freezing Effects 0.000 claims description 5
- 239000002250 absorbent Substances 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims 1
- 230000001105 regulatory effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 14
- 206010019345 Heat stroke Diseases 0.000 abstract description 5
- 230000035900 sweating Effects 0.000 abstract description 5
- 238000005259 measurement Methods 0.000 description 19
- 238000001816 cooling Methods 0.000 description 17
- 230000004888 barrier function Effects 0.000 description 15
- 239000000243 solution Substances 0.000 description 9
- 229910017053 inorganic salt Inorganic materials 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- 230000036760 body temperature Effects 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- 241000574149 Podotheca Species 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 244000052769 pathogen Species 0.000 description 2
- 230000003238 somatosensory effect Effects 0.000 description 2
- 210000001562 sternum Anatomy 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 206010035664 Pneumonia Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 235000019270 ammonium chloride Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 210000000038 chest Anatomy 0.000 description 1
- 239000011557 critical solution Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 210000002414 leg Anatomy 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 244000000010 microbial pathogen Species 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 210000000115 thoracic cavity Anatomy 0.000 description 1
- 210000000689 upper leg Anatomy 0.000 description 1
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- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D13/00—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
- A41D13/12—Surgeons' or patients' gowns or dresses
- A41D13/1209—Surgeons' gowns or dresses
- A41D13/1218—Surgeons' gowns or dresses with head or face protection
-
- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D13/00—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
- A41D13/002—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches with controlled internal environment
- A41D13/005—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches with controlled internal environment with controlled temperature
- A41D13/0053—Cooled garments
-
- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D13/00—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
- A41D13/002—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches with controlled internal environment
- A41D13/005—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches with controlled internal environment with controlled temperature
- A41D13/0053—Cooled garments
- A41D13/0056—Cooled garments using evaporative effect
-
- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D27/00—Details of garments or of their making
-
- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D31/00—Materials specially adapted for outerwear
- A41D31/04—Materials specially adapted for outerwear characterised by special function or use
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/02—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques
- C08J3/03—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques in aqueous media
- C08J3/075—Macromolecular gels
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/16—Materials undergoing chemical reactions when used
-
- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D2500/00—Materials for garments
- A41D2500/50—Synthetic resins or rubbers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2333/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
- C08J2333/24—Homopolymers or copolymers of amides or imides
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2403/00—Characterised by the use of starch, amylose or amylopectin or of their derivatives or degradation products
- C08J2403/02—Starch; Degradation products thereof, e.g. dextrin
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2429/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Derivatives of such polymer
- C08J2429/02—Homopolymers or copolymers of unsaturated alcohols
- C08J2429/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2433/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
- C08J2433/02—Homopolymers or copolymers of acids; Metal or ammonium salts thereof
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Abstract
本发明公开了一种感温和温度调节的隔离衣，包括具有内层和外层的隔离衣本体，所述内层和外层之间设置有若干个一次性医用冰袋,所述一次性医用冰袋包括袋体，所述袋体内置有硝酸铵和水包，所述水包由防水透气膜制成，所述水包内填充有含水凝胶，所述含水凝胶与硝酸铵通过水包分离。本发明具有以下优点和效果：这种隔离衣可降低穿着时引起的闷热和大量发汗，降低医务人员中暑的发生率，增加穿着的舒适感，有效提高医务人员的工作效率。
The invention discloses a temperature-sensing and temperature-regulating isolation gown, comprising an isolation gown body with an inner layer and an outer layer, a plurality of disposable medical ice packs are arranged between the inner layer and the outer layer, and the disposable medical ice packs Including a bag body, the bag body is built with ammonium nitrate and a water bag, the water bag is made of a waterproof and breathable film, the water bag is filled with a water-containing gel, and the water-containing gel and ammonium nitrate are separated by the water bag . The present invention has the following advantages and effects: the isolation gown can reduce sultry heat and a lot of sweating caused by wearing, reduce the incidence of heat stroke of medical staff, increase wearing comfort, and effectively improve the working efficiency of medical staff.
Description
Technical Field
The invention relates to medical supplies, in particular to a temperature-sensing and temperature-adjusting isolation clothes.
Background
Due to the concentration of various pathogenic microorganisms and pathogens and the wide prevalence of novel coronary pneumonia in hospitals, the utilization rate of the isolation gown in the hospitals is greatly improved. Barrier gowns are one of the most important measures to reduce infection in healthcare workers as an effective means of preventing and controlling the spread of pathogens.
Because the isolation effect of the isolation clothes depends on the tight protection degree, the problem of poor temperature cycle exchange of the isolation clothes exists in the daily use process. In addition, medical staff has the defects of massive sweating, dehydration, heatstroke and the like when wearing the clothes, and the physiological burden of the medical staff is increased in the epidemic prevention period of minutes and seconds. The suitable environment temperature range of human body is about 26-32 ℃, therefore, the isolation clothes is improved, the isolation clothes can maintain 26-32 ℃ in the use state, and the isolation clothes has important significance for improving the wearing comfort of medical staff.
Disclosure of Invention
The invention aims to provide a temperature-sensing and temperature-adjusting barrier gown, which can reduce stuffiness and a great deal of sweating caused by wearing, reduce the occurrence rate of heatstroke of medical staff, increase the wearing comfort and effectively improve the working efficiency of the medical staff.
The technical purpose of the invention is realized by the following technical scheme: a temperature-sensing and temperature-regulating barrier gown comprises a barrier gown body with an inner layer and an outer layer, wherein a plurality of disposable medical ice bags are arranged between the inner layer and the outer layer; the disposable medical ice bag comprises a bag body, wherein ammonium nitrate and a water bag are arranged in the bag body, the water bag is made of a waterproof breathable film, hydrogel is filled in the water bag, and the hydrogel is separated from the ammonium nitrate through the water bag.
The invention is further provided with: the preparation method of the aqueous gel comprises the following steps:
s1: weighing the following components in percentage by mass: 10% of poly-N-isopropylacrylamide gel; 2% of sodium polyacrylate spherical water-absorbent resin; 5% of polyvinyl alcohol; 0.3% of pregelatinized starch; the balance of water, and the sum of the mass percentages of the components is 100 percent;
s2, sequentially adding poly-N-isopropylacrylamide gel and sodium polyacrylate spherical water-absorbing resin into water, and uniformly mixing to obtain a temperature-sensitive hydrogel-containing concentrated solution;
s3: dissolving polyvinyl alcohol and pregelatinized starch in water under the assistance of microwave to obtain clear solution, adding temperature-sensitive aqueous gel concentrate, filling into a mold, freezing at a temperature of not higher than-10 deg.C for 2-3 hr, and repeatedly freezing for 2-5 times.
The invention is further provided with: an interlayer is arranged between the inner layer and the outer layer, and a plurality of disposable medical ice bags are distributed on two sides of the interlayer.
The invention is further provided with: still be provided with temperature sensor between inlayer and the intermediate layer, one side electricity of temperature sensor is connected with temperature reminding device.
The invention is further provided with: the isolation clothes body comprises a head cover, a coat and trousers which are integrally connected, the coat is composed of a front left garment piece, a front right garment piece, a rear garment piece and two sleeves, and a zipper is arranged between the front left garment piece and the front right garment piece and is detachably connected through the zipper.
The invention is further provided with: a front fly is arranged on one side of the front left garment piece and detachably connected with the front right garment piece through a magic tape, and the position of the front fly corresponds to the zipper to cover the zipper.
The invention is further provided with: one end of each sleeve is provided with a threaded cuff which can be matched with the medical shell glove.
The invention is further provided with: the bottoms of the trousers are provided with threaded trousers bottoms which can be matched with the protective foot covers.
In conclusion, the invention has the following beneficial effects: the application can realize the use of the isolation clothes for cooling for at least 6 hours. The first stage can last for 4 hours, and the secondary cooling effect brought by the cooperation of the evaporated moisture and the ammonium nitrate can last for 2 hours, so as to meet the daily use requirement of medical staff. If the isolating clothes are worn after 6 hours in case of emergency, the medical staff can manually press or knead the water bag to make the hydrogel contact with the ammonium nitrate water solution, so as to generate temporary cooling effect. In addition, the cooling material that this application adopted keeps apart through multilayer structure and human body, and then can not cause the damage to the human body.
Drawings
FIG. 1 is a schematic structural diagram of the first embodiment;
FIG. 2 is a schematic structural diagram of an inner layer, an interlayer, an outer layer and a disposable medical ice bag;
fig. 3 is a schematic structural view of the disposable medical ice bag in fig. 2.
Reference numerals: 1. a barrier gown body; 2. an inner layer; 3. an outer layer; 4. disposable medical ice bag; 5. an inorganic salt; 6. water bags; 7. an interlayer; 8. a head cover; 9. a coat; 10. trousers; 11. a front fly.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The first embodiment is as follows:
as shown in fig. 1-3, a temperature sensing and temperature adjusting barrier gown comprises a barrier gown body 1, wherein the barrier gown body 1 comprises an inner layer 2 and an outer layer 3, a plurality of disposable medical ice bags 4 are arranged between the inner layer 2 and the outer layer 3, and the disposable medical ice bags 4 absorb a large amount of heat by rubbing or extruding the disposable medical ice bags 4, so that the purpose of cooling is achieved.
When medical staff wear the isolation clothes, once feeling sultry and sweating with the warning sign of heatstroke, the disposable medical ice bag 4 arranged in the isolation clothes body 1 can be pressed or kneaded by hands of human body, so that the disposable medical ice bag 4 absorbs a large amount of heat, and the purpose of cooling is achieved.
Further, the disposable medical ice bag 4 comprises a bag body, wherein inorganic salt 5 and a water bag 6 filled with water are arranged in the bag body, and the water and the inorganic salt 5 are separated through the water bag 6. When in use, the water bag 6 is broken through kneading or squeezing, so that the inorganic salt 5 is dissolved in water, and a large amount of heat is absorbed, thereby achieving the purpose of cooling.
Specifically, the inorganic salt 5 in this application is ammonium chloride or ammonium nitrate.
Further, an interlayer 7 is arranged between the inner layer 2 and the outer layer 3, and a plurality of disposable medical ice bags 4 are distributed on two sides of the interlayer 7. Through the setting of intermediate layer 7, and set up disposable medical ice bag 4 on intermediate layer 7 as far as, the situation of sultriness and a large amount of sweating that arouse when coming better reduction medical staff to wear the barrier gown reduces the incidence of medical staff's heatstroke, increases the comfort of wearing, effectively improves medical staff's work efficiency.
Further, a temperature sensor (not shown in the figures) is arranged between the inner layer 2 and the interlayer 7, and one side of the temperature sensor is electrically connected with a temperature reminding device (not shown in the figures). It should be noted that: the temperature reminding device can be a sound reminding device, a vibration reminding device and the like, and is specifically a buzzer or a vibrator; in addition, when the temperature sensor detects that the temperature in the isolation clothes body 1 reaches a set value, the temperature reminding device is driven to remind. The above structure and connection method are prior art, and are not described in detail herein. Specifically, chinese patent publication No. CN203053578U discloses a temperature reminder.
Further, the temperature sensor is preferably arranged at the position of the isolation clothes body 1 corresponding to the corner of the sternum of the human body. The sternum angle is usually used as the locating mark of the thoracic vertebra plane, and the temperature sensor is arranged on the isolation clothes body 1 at the position corresponding to the position, so that the sense of existence of the temperature sensor when medical staff wear the isolation clothes is reduced, and the normal work of the medical staff is not influenced.
Further, the isolation clothes body 1 comprises a head cover 8, a coat 9 and trousers 10 which are integrally connected, the coat 9 is composed of a front left garment piece, a front right garment piece, a rear garment piece and two sleeves, and a zipper (not shown in the drawing) is arranged between the front left garment piece and the front right garment piece and is detachably connected through the zipper.
Further, one side of the front left garment piece is provided with a front fly 11, and the front fly 11 is detachably connected with the front right garment piece through a magic tape. The fly 11 is positioned to correspond to the zipper to cover the zipper.
Because the zip fastener has the gap for the isolation effect of barrier gown can receive the influence, and this application is through addding door front of a garment 11, with corresponding zip fastener department, thereby strengthens the isolation effect of barrier gown in zip fastener department.
Further, the isolation gown body 1 of this application can use with medical surgical gloves, protection podotheca, protection mask and goggles collocation to play the omnidirectional isolation protective effect to medical personnel.
Furthermore, a plurality of disposable medical ice bags 4 are distributed on the isolation clothes body 1 corresponding to the front arms, the chest, the shoulders and the backs on the two sides and the inner side edges of the thighs on the two sides of the human body.
Furthermore, the brim of the hood 8 and the waist of the coat 9 are provided with elastic bands (not shown in the attached figures) to adjust themselves according to the use requirements of different medical care personnel. Wherein, the elastic band positioned on the head cover 8 can also be used together with a protective mask and goggles, thereby effectively wrapping the hair of medical staff and reducing the possibility of pollution.
Further, one end of each sleeve is provided with a threaded cuff (not shown in the figures). The bottoms of the trousers 10 are also threaded (not shown). This screw thread cuff can use with the cooperation of medical shell gloves, and this screw thread bottom of a trouser leg can use with the cooperation of protection podotheca, strengthens the frictional resistance of both junctions, further promotes the isolation effect of both junctions, further reduces the possibility of polluting.
Example two:
the difference from the first embodiment is that: the disposable medical ice bag 4 has the following differences:
the disposable medical ice bag 4 comprises a bag body, wherein ammonium nitrate and a water bag are arranged in the bag body, the water bag and the bag body are both made of waterproof breathable films, and hydrogel is filled in the water bag. The aqueous gel is separated from the ammonium nitrate by water-in-water separation.
When the water-containing gel is applied specifically, the water-containing gel can play a role in cooling once, namely, the heat inside the isolation clothes is taken away through the evaporation of the water inside the water-containing gel, so that the purpose of local cooling is achieved, and the cooling effect mainly depends on the water content in the water-containing gel. Because the water drum of the application adopts the arrangement of the waterproof breathable film, namely, the water in the liquid state in the hydrogel is still positioned in the waterproof breathable film and cannot flow out. Only the inside temperature of the barrier gown is high, so that the moisture in the hydrogel is evaporated and converted into a gaseous state to escape from the water pack to the outside.
It should be noted that the water bag is located in the bag body, and the bag body is filled with ammonium nitrate, that is, the water vapor overflows toward the inside of the bag body, so as to contact with the ammonium nitrate crystals, so that the ammonium nitrate crystals continuously undergo dissolution and endothermic reactions, thereby absorbing a large amount of heat to achieve the purpose of secondary cooling. It is specifically noted that ammonium nitrate is readily soluble in water while absorbing heat and does not chemically react with water.
It should be noted that, in this application, the bag body is also made of a waterproof and breathable film material, that is, when the vapor and the ammonium nitrate crystals are continuously dissolved, a part of the vapor is liquefied into water to be retained in the bag body, and at this time, if a user presses or kneads the water drum, the hydrogel in the water drum is in contact with the ammonium nitrate aqueous solution, so that the hydrogel absorbs the ammonium nitrate aqueous solution. Once again heated, the aqueous ammonium nitrate solution in the aqueous gel evaporates, removing heat. It is emphasized that the solvent water is still evaporated at this time, but the solute ammonium nitrate is not, and the temperature reduction principle at this time is consistent with the above-mentioned one-time temperature reduction.
Further, the preparation method of the aqueous gel comprises the following steps:
s1: weighing the following components in percentage by mass: 10% of poly-N-isopropylacrylamide gel; 2% of sodium polyacrylate spherical water-absorbent resin; 5% of polyvinyl alcohol; 0.3% of pregelatinized starch; the balance of water, and the sum of the mass percentages of the components is 100 percent;
s2, sequentially adding poly-N-isopropylacrylamide gel and sodium polyacrylate spherical water-absorbing resin into water, and uniformly mixing to obtain a temperature-sensitive hydrogel-containing concentrated solution;
s3: dissolving polyvinyl alcohol and pregelatinized starch in water under the assistance of microwave to obtain clear solution, adding temperature-sensitive aqueous gel concentrate, filling into a mold, freezing at a temperature of not higher than-10 deg.C for 2-3 hr, and repeatedly freezing for 2-5 times.
Further, the microwave-assisted operation means that polyvinyl alcohol and pregelatinized starch are dissolved in water and then put into a microwave reactor for reaction for 5-10 seconds.
The cooling effect of the barrier gown of this example will be described below through experiments.
Firstly, a constant temperature heating plate is used for simulating the temperature reduction effect of human body temperature test, the hydrogel is placed on the constant temperature heating plate at 32 ℃, the temperature of the constant temperature plate (namely the contact surface of the hydrogel and the constant temperature plate) is measured every 5 minutes, and the measurement is continued for 30 minutes.
| Measuring time | First measuring temperature | Measuring the temperature for the second time | Measuring the temperature for the third time | Average measured temperature |
| Before measurement | 32.2℃ | 32.5℃ | 32.3℃ | 32.33℃ |
| Measurement for 5 minutes | 31.1℃ | 31.3℃ | 31.3℃ | 31.23℃ |
| Measurement for 10 minutes | 30.5℃ | 30.3℃ | 30.4℃ | 30.4℃ |
| Measurement for 15 minutes | 28.2℃ | 28.4℃ | 28.1℃ | 28.23℃ |
| Measurement for 20 minutes | 27.1℃ | 27.1℃ | 27.4℃ | 27.2℃ |
| Measurement for 25 minutes | 26.3℃ | 26.8℃ | 26.0℃ | 26.37℃ |
| Measurement for 30 minutes | 25.0℃ | 25.1℃ | 25.7℃ | 25.27℃ |
The low critical solution temperature of the hydrogel is 32 ℃, and once the external environment temperature reaches 32 ℃, the hydrogel can be triggered to shrink, so that the water in the hydrogel is evaporated, and then the heat is taken away. And can be reduced to 25 deg.C after 30 min. The isolation clothes can maintain the temperature of 26-32 ℃ in the use state, and has important significance for improving the wearing comfort of medical staff.
And secondly, simulating the temperature reduction effect of the human body temperature test by using a constant temperature heating plate, placing the hydrogel on the constant temperature heating plate at 32 ℃, measuring the temperature of the constant temperature plate (namely the contact surface of the hydrogel and the constant temperature plate) every 30 minutes, and continuously measuring for 4 hours.
| Measuring time | Average measured temperature |
| Before measurement | 32.33℃ |
| Measurement for 0.5 hour | 25.27℃ |
| Measurement for 1.0 hour | 25.8℃ |
| Measurement for 1.5 hours | 25.9℃ |
| Measurement for 2.0 hours | 26.3℃ |
| Measurement for 2.5 hours | 27.5℃ |
| Measurement for 3.0 hours | 28.9℃ |
| Measurement for 3.5 hours | 30.2℃ |
| Measurement for 4.0 hours | 31.7℃ |
| Measurement for 4.5 hours | 32.5℃ |
Once triggered, the aqueous gel of the present application may be cooled for up to 4 hours to control the ambient temperature below 32 ℃.
Thirdly, selecting the testers to wear the isolation clothes of the second embodiment, and setting the common medical isolation clothes on the market as a comparison group: the test result comprises somatosensory effect evaluation and measurement result evaluation of a non-contact thermometer; wherein the temperature test result takes the temperature of the isolation clothes lower than the normal body temperature by 0.5-3 ℃ as the standard for judging the cooling and defervescing effects; carrying out data acquisition every 2 hours for temperature measurement and somatosensory effect to obtain the following test results;
the isolation clothes need to be stored to a shady and cool place in the dark during daily storage, and the environment temperature of the place is not higher than 32 ℃. The temperature-sensitive type hydrogel concentrated solution is formed by mixing poly N-isopropyl acrylamide gel and sodium polyacrylate spherical water-absorbing resin, the low critical dissolving temperature of the concentrated solution is 32 ℃, when the environmental temperature is higher than 32 ℃, the gel shrinks, water in the hydrogel evaporates, and heat of a human body is taken away. Wherein, the sodium polyacrylate spherical water-absorbing resin can realize water absorption and swelling again, thereby realizing multiple cooling.
In addition, this application can realize the use of cooling 6 hours at least to the barrier gown. The first stage can last for 4 hours, and the secondary cooling effect brought by the cooperation of the evaporated moisture and the ammonium nitrate can last for 2 hours, so as to meet the daily use requirement of medical staff. If the isolating clothes are worn after 6 hours in case of emergency, the medical staff can manually press or knead the water bag to make the hydrogel contact with the ammonium nitrate water solution, so as to generate temporary cooling effect.
The specific embodiments are only for explaining the present invention, and the present invention is not limited thereto, and those skilled in the art can make modifications without inventive contribution to the present embodiments as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (8)
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| CN115024541A (en) * | 2022-07-25 | 2022-09-09 | 广东必达医疗科技有限公司 | Temperature sensing and temperature regulation's barrier gown |
| CN115120899A (en) * | 2022-06-28 | 2022-09-30 | 浙江蓝天制衣有限公司 | Functional firefighter uniform capable of being cooled rapidly and emergency early warning method thereof |
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