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Coatable polyacrylamide hydrogel-based high-sensitivity humidity response driver and preparation method thereof

A polyacrylamide, humidity-responsive technology, applied in the field of humidity-responsive actuators, can solve the problems of high water surface tension, dehydration, and weakened driving performance, and achieve the effects of fast response speed, simple preparation, and high humidity sensitivity

Active Publication Date: 2022-04-26
ANYANG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, actuators with two-layer structure are commonly used to construct stimuli-responsive hydrogel-coated actuators, but due to the relatively high surface tension of water, it is difficult to tightly coat the surface of the substrate, and it also faces serious dehydration problems, which will seriously weaken its drive performance

Method used

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  • Coatable polyacrylamide hydrogel-based high-sensitivity humidity response driver and preparation method thereof
  • Coatable polyacrylamide hydrogel-based high-sensitivity humidity response driver and preparation method thereof
  • Coatable polyacrylamide hydrogel-based high-sensitivity humidity response driver and preparation method thereof

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Embodiment 1

[0029] Preparation method based on coatable polyacrylamide hydrogel high sensitivity humidity response driver, which comprises the following steps:

[0030] 1) Preparation of a hydrogel coatable with polyacrylamide by free radical polymerization:

[0031] 0.75 g acrylamide monomer and 0.0035 g ammonium persulfate are added to a 9.5 mL crosslinker solution (the crosslinker solution is a homogeneously dispersed mixed solution obtained by stirring vinyl triethoxysilane in deionized water for 24 hours until the oily droplets disappear, with a mass concentration of 0.1%) and then the mixed solution is at N 2 Sealed in an atmosphere at 42 °C for 12 h, synthesized to obtain a hydrogel coatable with polyacrylamide;

[0032] 2) Preparation of a three-layer structure composite film based on polyacrylamide hydrogel, i.e., humidity response driver: the adhesion performance and water retention performance of the hydrogel are poor, based on this application, based on the invention of polyacryla...

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Abstract

The invention relates to a preparation method of a high-sensitivity humidity response driver based on a coatable polyacrylamide hydrogel, which comprises the following steps: mixing an acrylamide monomer, ammonium persulfate and a cross-linking agent solution, and sealing in N2 atmosphere at 35-50 DEG C for 8-15 hours to obtain the coatable polyacrylamide hydrogel; the preparation method comprises the following steps: coating a PET film with a layer of poly (isooctyl acrylate) adhesive, drying to obtain an adhesive layer, then coating the surface of the adhesive layer with the coated polyacrylamide hydrogel by using a blade coating method, and placing at room temperature to obtain the adhesive. The three-layer structure composite film (namely a humidity response driver) can generate rapid and large-deformation driving response in an environment with a relative humidity difference of 60%, and has good reversible response and driving performance; under the environment that the relative humidity difference is 60%, the maximum bending angle of the humidity response driver ranges from 630 degrees to 297 degrees, and the response time and the recovery time are both within 10 seconds.

Description

Technical field [0001] The present invention belongs to the field of humidity response driver technology, specifically relates to a highly sensitive humidity response driver based on a coating polyacrylamide hydrogel and a preparation method thereof. Background [0002] Hydrogel is a three-dimensional network crosslinking structure containing a large amount of water, which has certain flexibility and biocompatibility and other characteristics and is widely used and studied in sensors, biomedicine and other fields. Among them, intelligent response hydrogels can produce swelling / deswelling in external environmental stimuli such as temperature, pH, humidity, etc., thereby generating reversible drive responsiveness, which has potential application prospects in intelligent robots, biomedicine and other fields. [0003] Researchers have developed a number of stimulus response drivers based on hydrogels, such as the research team of Professor Xu Shimei of Sichuan University using elect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/12C08J3/075C08L67/02C08L33/26C08L33/08
CPCC08J5/124C08J3/075C08J2367/02C08J2433/26C08J2433/08
Inventor 李晶晶刘遵峰周湘
Owner ANYANG NORMAL UNIV
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