A high-strength and low-temperature resistant organic hydrogel and preparation method thereof

Abstract

The invention discloses high / low-temperature resistant high-toughness organic hydrogel and a preparation method thereof. The preparation method of the organic hydrogel comprises the following steps: carrying out a polymerization reaction on 2-acrylamide-2-methyl propanesulfonic acid, N,N'-methylene bisacrylamide, an initiator and a reducing agent in an aqueous solution system so as to obtain single network hydrogel; impregnating the single network hydrogel into a solution containing acrylamide, N,N'-methylene bisacrylamide and a photoinitiator, and performing light initiated polymerization toobtain double network hydrogel; and impregnating the double network hydrogel into a lithium chloride / ethylene glycol mixed solution until a mass balance is reached, thereby obtaining the organic hydrogel. The preparation method is simple, the cost is low, and the prepared organic hydrogel has excellent mechanical property, can maintain excellent flexibility in an environment having a temperature range from 80 DEG C below zero to 120 DEG C, and has potential application value in the fields of biological medicine, flexible capacitors and the like.

Description

Technical field [0001] The invention relates to an organic hydrogel, in particular to an organic hydrogel with both high temperature resistance and low temperature resistance and high strength and toughness, and also relates to a method for preparing organic hydrogel through solvent exchange, belonging to the field of functional polymer materials . Background technique [0002] Hydrogel is a water-rich soft material with a three-dimensional network structure. The interaction mechanism between hydrophilic polymer chains has many forms, such as electrostatic interaction, hydrogen bonding, host-guest interaction, coordination, and affinity Water effect and so on. When materials with different monomers or characteristic functional groups are introduced, the hydrogel will exhibit specific properties and can be used in the fields of biomedical materials, super flexible capacitors, sensors, actuators, etc., and thus has attracted widespread attention. [0003] Double network hydrogel (D...

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Problems solved by technology

[0005] For hydrogels and organic hydrogels in the prior art generally have poor mechanical properties, are easy to break, and are easy to dry out and lose flexibility in low-temperature and high-temperature environments, the first purpose of the present invention is to Provide an organic hydrogel that not only has strong mechanical properties, but also can maintain its excellent flexibility in the environment of -80°C to 120°C; the organic hydrogel has high practical application value

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