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Flexible polymer material coolant and preparation method thereof

A technology of flexible polymer and cold storage agent, applied in heat exchange materials, chemical instruments and methods, clothing, etc., can solve the problems of non-fit to the human body, energy waste, uneven unevenness, increase comfort, reduce costs, low cost effect

Inactive Publication Date: 2020-02-28
HEFEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, no matter what kind of cooling agent is used, it needs to be stored in a low-temperature environment. After the cooling agent is frozen, it will become hard and uneven, which does not fit the human body very well. energy wasted

Method used

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  • Flexible polymer material coolant and preparation method thereof
  • Flexible polymer material coolant and preparation method thereof
  • Flexible polymer material coolant and preparation method thereof

Examples

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preparation example Construction

[0025] The method for preparing the flexible polymer material cold storage agent of the present invention, the steps are as follows:

[0026] 1), under heating conditions, prepare polyvinyl alcohol solution, stir to make it dissolve;

[0027] 2), while maintaining the temperature, add propylene glycol and glycerin, and stir well after each addition;

[0028] 3), prepare borax solution, and be heated to step 1) same temperature;

[0029] 4), the borax solution is mixed with the solution obtained in step 2), and stirred evenly to obtain the cooling agent;

[0030] 5), transferred to the packaging bag to cool down to room temperature, and then frozen.

[0031] Main chemical reagent used in the present invention is as follows:

[0032] Polyvinyl alcohol (polymerization degree 1750±50) (CH 2 CHOH)n≥99.0% Sinopharm Chemical Reagent Co., Ltd.

[0033] Propylene Glycol C 3 h 8 o 2 ≥99.0% Yonghua Chemical Technology Co., Ltd.

[0034] Glycerin C 3 h 8 o 3 ≥99.5% Sinopharm C...

Embodiment 1

[0038] 1) Weigh a certain mass of polyvinyl alcohol and tap water, pour them into a three-necked flask, and stir for 2.5 hours to dissolve them in a water bath at 95° C. to obtain a 5% polyvinyl alcohol solution.

[0039] 2) Measure 50 mL of polyvinyl alcohol solution with a concentration of 5%, and maintain the temperature at 95° C., add 1.5 mL of propylene glycol, and stir thoroughly.

[0040] 3) Measure 15mL of borax solution with a concentration of 8% in tap water, place it in a water bath and heat it to 95°C, then slowly pour the borax solution into the solution in step 2) along the glass rod, pouring while pouring Stir to make it fully mixed to obtain the cooling agent.

[0041] 4) Put it in a plastic bag and seal it, cool it down to room temperature, then freeze it below -10°C for 12 hours, take it out for testing.

[0042] As a contrast, the cold storage agent prepared in Example 1 does not add glycerin, and its photo is as follows figure 1 As shown in a, no indentat...

Embodiment 2

[0045] 1) Weigh a certain mass of polyvinyl alcohol and tap water, pour it into a three-necked flask, and stir for 3 hours to dissolve it in a water bath at 90° C. to obtain a 5% polyvinyl alcohol solution.

[0046] 2) Measure 50 mL of polyvinyl alcohol solution with a concentration of 5%, and maintain the temperature at 95° C., add 2 mL of propylene glycol, stir well, then add 2 mL of glycerin, and stir well again.

[0047] 3) Measure 15mL of borax solution with a concentration of 10% in tap water, place it in a water bath and heat it to 90°C, then slowly pour the borax solution into the solution in step 2) along the glass rod, pouring while pouring Stir to make it fully mixed to obtain the cooling agent.

[0048] 4) Put it in a plastic bag and seal it, cool it down to room temperature, then freeze it below -10°C for 12 hours, take it out for testing.

[0049] The cold storage agent prepared in embodiment 2 added glycerin on the basis of propylene glycol, and its softness wa...

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Abstract

The invention discloses a flexible polymer material coolant and a preparation method thereof, and relates to the technical field of coolants, wherein the coolant is prepared from 2-4 parts of polyvinyl alcohol, 1.5-2.5 parts of propylene glycol, 1-3 parts of glycerol, 1-2 parts of borax and 60-70 parts of water. The preparation method comprises: under a heating condition, preparing a polyvinyl alcohol solution, and stirring to dissolve the polyvinyl alcohol solution; maintaining the temperature, adding propylene glycol and glycerol, and fully and uniformly stirring after each addition; preparing a borax solution, and heating to the same temperature; mixing the borax solution and the obtained solution, and uniformly stirring to obtain the coolant; and transferring into a packaging bag, cooling to a room temperature, and then freezing. According to the invention, the components and the ratio thereof of the coolant are reasonably selected, particularly part of glycerol is added as the cold accumulation aid, and the adding of the glycerol achieves the effect of the cooling aid and the effect of the softening agent, so that the prepared coolant is still soft after being frozen and accumulated, and can well fit a human body when being applied to protective clothing so as to improve wearing comfort.

Description

technical field [0001] The invention relates to the technical field of cold storage agents, in particular to a cold storage agent made of flexible polymer materials and a preparation method thereof. Background technique [0002] The high temperature environment not only seriously endangers the health of the human body, but also threatens the normal production. Because the human body is in a hot environment, the central nervous system is inhibited, which distracts attention and reduces the accuracy and coordination of movements. Adhering to the concept of "people-oriented", personal protective cooling clothing came into being, and the core technology in personal protective cooling clothing is the cooling agent. At present, the cooling agent used in cooling clothing in the market mainly includes two types: one is based on polyvinyl alcohol This kind of polymer material is used as a raw material, and the gel is made with water additives; the other is made of super absorbent re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06A41D13/005
CPCA41D13/0053C09K5/066Y02E60/14
Inventor 冯立品王明梁国治张奋奋孙文娟
Owner HEFEI UNIV
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