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Trace ion response hydrogel and preparation method thereof

A technology of hydrogel and ions, which is applied in the field of trace ion-responsive hydrogel and its preparation, can solve the problems of poor applicability of the gel, and achieve the effects of enhanced mechanical properties, easy long-distance transportation, and simple preparation methods

Inactive Publication Date: 2014-11-26
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Shape memory hydrogel is a kind of shape memory polymer. It uses the volume expansion and contraction characteristics of hydrogel to realize the shape memory function. At present, there are few reports on shape memory hydrogel, and many reports are based on temperature response. To achieve shape memory, but because the gel contains a lot of water, compared with the shape memory polymer material, this temperature-sensitive mechanism is much less suitable for the gel

Method used

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  • Trace ion response hydrogel and preparation method thereof
  • Trace ion response hydrogel and preparation method thereof
  • Trace ion response hydrogel and preparation method thereof

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Embodiment

[0020] Add monomer 1-vinylimidazole (14.4 mg), acrylonitrile (4.8 mg), crosslinker polyethylene glycol diacrylate (9.6 mg, number average molecular weight 575) into a 1.5 ml centrifuge tube, and use 171 μl of After dimethyl sulfoxide (DMSO) dissolves the monomer and crosslinker, add the photoinitiator Irgacure2959 (0.8 mg, 1-[4-(2-hydroxyethoxy)-phenylene]-2-hydroxy-2 ',2'-Dimethylethanone). Add the solvent containing monomer, cross-linking agent and initiator into the circular mold, and irradiate the mold in a UV curing box for 30 minutes to fully initiate free radical polymerization. Then the mold was opened to take out the gel, rinsed several times with deionized water, soaked for 7 days, and replaced the deionized water every 12 hours. The water absorption of the prepared hydrogels was tested. The gel sheet was prepared by the same procedure, and the mechanical properties, metal ion complexation and shape memory experiments were carried out. This gel sample is named PVI...

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Abstract

The invention discloses a trace ion response hydrogel and a preparation method thereof. The trace ion response hydrogel is formed by copolymerizing 1-vinylimidazole, acrylonitrile and cross-linking agents through free radical polymerization, two ends of a molecular chain of a cross-linking agent molecule are provided with carbon-carbon double bonds, a main chain structure of a polyethylene glycol molecule is positioned in the middle of the molecular chain, and the trace ion response hydrogel is prepared through a free radical polymerization reaction under an anaerobic condition. The trace ion response hydrogel is capable of achieving effects of shape memories through complexation and decomplexation actions with metal ions.

Description

technical field [0001] The present invention relates to a trace ion-responsive hydrogel and its preparation method, more specifically, to 1-vinylimidazole and acrylonitrile copolymer (PVI-co-PAN) hydrogel and its preparation method. Background technique [0002] Shape memory polymer material (Shape Memory Polymer), as a functional polymer material, has been developed more and more because of its large recoverable deformation, good adaptability, low price, and easy combination with other materials to form composite materials. more attention. Shape-memory polymer materials can be deformed and fixed under certain conditions. When needed, external stimuli such as heat, chemistry, mechanics, light, magnetism or electricity can be used to trigger the material to respond and restore it to its original state. shape. [0003] Hydrogel is a kind of polymer with a three-dimensional network structure that has a hydrophilic group, can absorb a large amount of water in water and swell s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F290/06C08F226/06C08F220/48C08L51/08
Inventor 刘文广南文静王玮
Owner TIANJIN UNIV
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