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Preparation method, product and application of double-layer water gel with salt-temperature dual response

A double-response, hydrogel technology, applied in the field of double-layer hydrogel products, achieves the effect of low cost, simple operation and high sensitivity

Active Publication Date: 2018-08-14
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The polymerization method is located at the interface of the aqueous and organic phases and is currently only applicable to the preparation of hydrogel-organogels

Method used

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  • Preparation method, product and application of double-layer water gel with salt-temperature dual response
  • Preparation method, product and application of double-layer water gel with salt-temperature dual response
  • Preparation method, product and application of double-layer water gel with salt-temperature dual response

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Dissolve 0.3g functional monomer N-isopropylacrylamide (NIPAM) and 0.3g formula II-12 monomer n=3 (VBIPS) in 2.0g deionized water, then add 0.002g photoinitiator 2-hydroxy -4'-(2-hydroxyethoxy)-2-methylpropiophenone (photoinitiator 2959), 0.002g crosslinker N,N-methylene bisacrylamide (MBAA), 0.006g free radical initiator Agent ammonium persulfate (APS) and 30 μL catalyst N,N,N′,N′-tetramethylethylenediamine (TEMED). After fully dissolving, nitrogen gas was blown for 20 minutes to obtain the reaction solution, and then the reaction solution was injected into the abrasive tool with a syringe. The abrasive tool was composed of two layers of quartz glass and a PTFE separator with a thickness of 0.5 mm. The reaction system was exposed to UV light with a wavelength of 365 nm for 2 hours at room temperature to obtain a polyNIPAM / VBIPS bilayer hydrogel. Soak the prepared polyNIPAM / VBIPS double-layer hydrogel in cold water at 25°C for 400s, and the double-layer hydrogel quickl...

Embodiment 2

[0052] Dissolve 0.24g functional monomer N-isopropylacrylamide (NIPAM) and 0.36g VBIPS in 2.0g deionized water, then add 0.0026g photoinitiator 2959, 0.002g crosslinking agent (MBAA), 0.0048g free base initiator (APS) and 25 μL catalyst (TEMED). After fully dissolving, nitrogen gas was blown for 20 minutes, and then the reaction liquid was injected into the abrasive tool with a syringe. The abrasive tool was composed of two layers of quartz glass and a 0.5mm thick PTFE separator. The reaction system was exposed to UV light with a wavelength of 365 nm for 2 hours at room temperature to obtain a polyNIPAM / VBIPS bilayer hydrogel. Soak the prepared polyNIPAM / VBIPS double-layer hydrogel in cold water at 25°C for 400s, and the double-layer hydrogel quickly bends toward the side of the polyVBIPS layer; turn the double-layer hydrogel from cold water to soak in 1mol / L After being immersed in NaCl solution for 400s, the double-layer hydrogel turned to the side of the polyNIPAM layer an...

Embodiment 3

[0055] Dissolve 0.18g functional monomer N-isopropylacrylamide (NIPAM) and 0.42g VBIPS in 2.0g deionized water, then add 0.003g photoinitiator 2959, 0.002g crosslinking agent (MBAA), 0.0036g free base initiator (APS) and 20 μL catalyst (TEMED). After fully dissolving, nitrogen gas was blown for 20 minutes, and then the reaction liquid was injected into the abrasive tool with a syringe. The abrasive tool was composed of two layers of quartz glass and a 0.5mm thick PTFE separator. The reaction system was exposed to UV light with a wavelength of 365 nm for 2 hours at room temperature to obtain a polyNIPAM / VBIPS bilayer hydrogel. Soak the prepared polyNIPAM / VBIPS double-layer hydrogel in cold water at 25°C for 400s, and the double-layer hydrogel quickly bends toward the side of the polyVBIPS layer; turn the double-layer hydrogel from cold water to soak in 1mol / L After being immersed in NaCl solution for 400s, the double-layer hydrogel turned to the side of the polyNIPAM layer and...

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Abstract

The invention discloses a preparation method of double-layer water gel with salt-temperature dual response. The method comprises the following steps of adding N-isopropylacrylamide, amphoteric ion monomers, cross-linking agents, photoinitiators, radical initiators and catalysts into water; performing stirring dissolution to obtain reaction liquid; performing polymerization reaction on the reactionliquid under inert gas protection and UV-irradiation; performing crosslinking for 1 to 5 hours to obtain poly-N-isopropylacrylamide and amphoteric ion polymer double-layer water gel. Great differences of two kinds of functional monomers in aspects of polarity and polymerization speed are utilized; the double-layer water gel with the salt-temperature dual response is prepared by a one-step method;the double-layer water gel can realize fast great-amplitude self periodic deformation in water-slat solution and low-temperature / high-temperature environment. The water gel can be used for being madeinto a soft body robot or sensor element realizing the salt-temperature dual response.

Description

technical field [0001] The invention relates to the field of preparation of hydrogel materials, in particular to a method for preparing a double-layer hydrogel with dual response to salt-temperature and a double-layer hydrogel product with dual response to salt-temperature obtained according to the preparation method and Applications of the bilayer hydrogel product. Background technique [0002] Hydrogel is a kind of soft material formed by cross-linking hydrophilic polymers to form a three-dimensional network structure. Its water content can be as high as 95%, and it has good biocompatibility. Smart hydrogels can be prepared by physically or chemically cross-linking stimuli-responsive polymers, and the volume and shape of smart hydrogels can be induced by changing external environmental conditions (such as temperature, pH, light, electric field, ions, etc.). Or other physical and chemical properties change, and can be used in biomedical and industrial applications (such as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/075C08F220/54C08F212/14C08F222/38C08F2/48C08L33/24C08L25/18
CPCC08F2/48C08F212/14C08F220/54C08J3/075C08J2325/18C08J2333/24C08F222/385
Inventor 杨晋涛肖圣威何晓敏钟明强陈枫范萍
Owner ZHEJIANG UNIV OF TECH
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