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Preparation method and application method of hydrogel for intelligent temperature control

An intelligent temperature control and hydrogel technology, which is applied in the field of polymer technology materials, can solve problems such as not being able to adapt to rapid changes in the environment, and achieve the effects of good recycling performance, good temperature control effect, and simple preparation methods

Inactive Publication Date: 2014-02-05
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage of these materials is that they cannot adapt to rapid changes in the environment

Method used

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  • Preparation method and application method of hydrogel for intelligent temperature control
  • Preparation method and application method of hydrogel for intelligent temperature control
  • Preparation method and application method of hydrogel for intelligent temperature control

Examples

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preparation example Construction

[0029] A method for preparing a hydrogel for intelligent temperature control of the present invention, the preparation method comprises the following process: adding N-isopropylacrylamide monomer, cross-linking agent, and distilled water into a beaker, ultrasonicating for 5 minutes, so as to dissolve Completely, add the initiator and initiator catalyst, pour it into the mold quickly after 5 minutes of ultrasonication, control the temperature at a constant temperature of 15°C~25°C, and react for 2 to 5 hours to form a cross-linked water gel. The mass ratio of crosslinking agent to N-isopropylacrylamide is 1: 20-50. The mass ratio of initiator to N-isopropylacrylamide is 1:50-100. The mass ratio of initiator catalyst to initiator is 1:1-2. The mass ratio of distilled water to N-isopropylacrylamide is 3-4:1.

[0030] As a preferred method, the crosslinking agent is N,N-methylenebisacrylamide. The initiator is persulfate or benzoyl peroxide. The initiator catalyst is N,N,N...

Embodiment 1

[0051] Weigh 5.0 g of NIPAM, 0.1 g of N,N-methylenebisacrylamide, and 20 ml of distilled water, add to a beaker to dissolve completely, add 0.0625 g of ammonium persulfate to dissolve completely, add N,N,N',N'- Methyldiethylamine 0.031 25g, the solution was added to the mold within 30 seconds and reacted for four hours. After the reaction was completed, the distilled water was washed three times, and the phase was changed three times at 25°C and 40°C to form a hydrogel.

[0052] Light transmission performance test of hydrogel. Test process: Place the blue plastic needle under the prepared arc-shaped smart hydrogel to observe the light transmittance of the hydrogel; heat the hydrogel at 40°C, and place the blue needle under the hydrogel after ten minutes to observe Hydrogel light transmission. Test results such as figure 2 shown. figure 2 The middle ordinate represents temperature, and the abscissa represents time. The test result is figure 2 The line represented by D i...

Embodiment 2

[0058] Weigh 5.0 g of NIPAM, 0.15 g of N,N-methylenebisacrylamide, and 17.5 ml of distilled water, add them into a beaker to dissolve completely, add 0.0625 g of ammonium persulfate to dissolve completely, add N,N,N',N'- Add 0.03125 g of methyldiethylamine into the mold within 30 seconds, and react for three hours. After the reaction, rinse with distilled water three times, and undergo phase transition three times at 25 °C and 40 °C to form a hydrogel.

[0059] The light transmission performance and water content of the hydrogel were tested. The measurement method is as shown in Example 1. The measurement results are shown in Table 1. The hydrogel of this example appears to be light-transmissive and recyclable greater than one hundred times.

[0060]

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Abstract

The invention discloses a preparation method of hydrogel for intelligent temperature control. The preparation method comprises the following steps: dissolving N-isopropylacrylamide in distilled water, adding a cross-linking agent and an initiator, adding an initiator catalyst after the cross-linking agent and the initiator are dissolved, and reacting under the constant temperature condition of 15-25 DEG C, thereby obtaining the hydrogel. The preparation method is simple, the prepared hydrogel has high heat dispersion and recyclability, and an object with to-be-controlled temperature can be subjected to temperature control in an environment-friendly energy-saving recycling mode. Meanwhile, the invention also discloses an application method of the hydrogel. The application method comprises the following steps: putting the hydrogel on the surface of the object with to-be-detected temperature, and regulating the temperature of the object with to-be-controlled temperature through the hydrogel.

Description

[0001] technical field [0002] The invention relates to the field of polymer technical materials, in particular to a preparation method and an application method of a hydrogel for intelligent temperature control. [0003] Background technique [0004] Polymer hydrogel materials are a kind of cross-linked materials that can quickly absorb water but are insoluble in water. They have the characteristics of polymer electrolytes and are a kind of functional polymer materials that can integrate water absorption, water retention and slow release into one. The special properties of polymer materials have attracted more and more research and attention, and their applications have penetrated into various fields such as drug sustained release, cooling and temperature control, desert control, energy conservation and environmental protection. There are many types of polymer hydrogel materials, among which smart materials occupy an important position. The so-called smart material is a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/54C08F222/38
Inventor 姜勇朱明露田艳芝
Owner SOUTHEAST UNIV
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