Nano composite hydrogel and preparation method thereof

Abstract

The invention discloses nano composite hydrogel and a preparation method thereof. The hydrogel is mainly prepared from, by weight, 5-25 parts of nano silicon dioxide, 1200-1500 parts of acrylamide, 3-5 parts of ammonium persulfate, 3-10 parts of methylacyloxysilane coupling agent, 5-8 parts of tetramethylethylenediamine, 3200-3600 parts of alcohol and 9000-9500 parts of water. Compared with the prior art, the nano composite hydrogel and the preparation method have the advantages that the raw materials include modified nano silicon dioxide (meeting a certain doping proportion), so that balanceswelling ratio of the hydrogel can be increased, strength and toughness of the hydrogel can be improved effectively, and the nano composite hydrogel has better enhancing and toughening effect than conventional hydrogel. In addition, an in-situ polymerization method is utilized, so that the hydrogel has good dispersion effect, and performance of final products can be improved greatly.

Description

technical field [0001] The invention relates to a nanocomposite hydrogel and a preparation method thereof, belonging to the technical field of nanocomposite hydrogels. Background technique [0002] In recent decades, the development of polymer materials has gradually developed towards functionalization and diversification. As an organic polymer material, hydrogel has excellent performance and has very good application prospects in many fields. However, because the artificially synthesized traditional hydrogel usually has microscopic defects such as low molecular chain density, small inter-molecular chain force, and randomness of the cross-linked network structure formed during the gel process, resulting in its Macroscopically, hydrogels show serious shortcomings such as poor mechanical properties, poor stability, and poor stimulus response, which greatly hinder the practical application of hydrogels. More and more domestic and foreign scholars have begun to study new types ...

AI Technical Summary

Problems solved by technology

[0004] At present, nanocomposite hydrogels mainly use nanoparticle soils such as nanocellulose crystals, nanoclays, and nanosilica as nanostrengthening factors. Due to the limitations of the particle size of nanoparticles and poor dispersion on the microscopic scale, it is difficult for the There are few studies on the in situ synthesis of nanoparticles with good dispersion in aqueous solution, which also inhibits the good mechanical properties of nanocomposite hydrogels to a certain extent, and limits the application range of nanocomposite hydrogels.