Temperature response type ionic gel, and preparation method and application thereof

An ion gel and temperature-responsive technology, which is applied in the field of temperature-responsive materials, can solve the problems of difficult adjustment of transition temperature, easy loss of water, and difficult adjustment of response temperature, etc., and achieves the effects of low cost, simple operation and broad application prospects

Active Publication Date: 2020-12-04
HANGZHOU INST OF ADVANCED MATERIAL BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, NIPAM hydrogel has the following problems: (1) Its response temperature is difficult to adjust, and the LCST of pure NIPAM hydrogel is 32 °C; (2) NIPAM hydrogel is very easy to lose water when exposed to air.
However, there are only ion gels with upper critical solution temperature (Upper Critical Solution Temperature, UCST) prepared by NIPAM, and the transition temperature is difficult to adjust.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] In this embodiment, the ionic liquid is 1-ethyl-3-methylimidazolium tetrafluoroborate ([C 2 MIM]BF 4 ), the polymer monomer is hydroxypropyl acrylate (HPA), the crosslinking agent is polyethylene glycol diacrylate (PEGDA), and the initiator is photoinitiator 1173 (2-hydroxyl-2-methyl-1-benzene base-1-propanone). The specific process is: the [C 2 MIM]BF 4 Mix evenly with HPA in a mass ratio of 6 to 4, then add PEGDA and 1173, the content is 0.5wt% and 1wt% of the HPA content, and transfer the resulting solution to the mold, under the light intensity of 80mW / cm 2 The 365nm LED lamp was irradiated for 3min to obtain an ion gel with UCST.

Embodiment 2

[0024] In the present embodiment, select 1-butyl-3-methylimidazolium tetrafluoroborate ([C 4 MIM]BF 4 ) as ionic liquid, polyhydroxyethyl acrylate (HEA) and methacrylic acid hydroxypropyl ester (HPA) as polymer monomers, crosslinking agent as 1,6-hexanediol diacrylate (HDDA), initiator For thermal initiator BPO. The specific process is: mix the ionic liquid, HEA, HPA, HDDA and BPO evenly according to a certain ratio, transfer the solution to the mold, and react at 60°C for 24 hours to obtain the ion gel with UCST. The transition temperature can be adjusted by changing the ratio of HEA and HPA.

Embodiment 3

[0026] In this embodiment, N-butylpyridine tetrafluoroborate is selected as the ionic liquid, polyhydroxyethyl methacrylate (HEMA) is used as the polymer substrate, and acetone is used as the solvent. The specific process is as follows: uniformly mix the ionic liquid, poly(hydroxyethyl methacrylate) and acetone, coat the obtained solution on a mold, and remove the acetone by volatilization under normal temperature or heating to obtain the ion gel with UCST.

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PUM

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Abstract

The invention relates to the field of temperature-responsive materials, and concretely relates to a temperature-responsive ionic gel with an upper critical transition temperature (UCST), and a preparation method and application thereof. An ionic liquid is mixed with a polymer substrate to obtain the mixture ionic gel with the upper critical transition temperature. The method has the characteristics of simple operation, environmental protection, low cost and the like, and the obtained ionic gel has the characteristics of high environmental stability and adjustable response temperature, and hasa wide application prospect in the fields of temperature sensors, intelligent glass, temperature corresponding materials and the like.

Description

technical field [0001] The invention relates to the field of temperature-responsive materials, in particular to a temperature-responsive ion gel, a preparation method and an application thereof. [0002] technical background [0003] In recent years, with the development of smart life, temperature-responsive materials have been widely studied, not only have a wide range of application requirements in the industrial field, but also continue to penetrate into people's daily life, such as temperature-sensitive smart glass, visualization Thermometers and temperature-responsive actuators, etc., therefore have great development potential and broad application prospects. [0004] Gel temperature-responsive materials have many unique properties, such as high transparency, high flexibility and adjustable response temperature, etc., so they have been widely researched and applied in recent years. Currently, the most commonly used temperature-responsive gel is based on N-iso The hydrog...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F220/20C08F265/06C08F222/14C08J3/09C08G81/02C08L51/08C08L51/00C08L33/14C08L87/00
CPCC08F283/065C08F265/06C08F220/20C08J3/096C08G81/025C08J2351/08C08J2351/00C08J2333/14C08J2387/00C08F222/102
Inventor 聂俊孙靖先
Owner HANGZHOU INST OF ADVANCED MATERIAL BEIJING UNIV OF CHEM TECH
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