Preparation method of dendriform organic montmorillonite reinforced aquagel

Abstract

The invention relates to a preparation method of a dendriform organic montmorillonite reinforced aquagel, which comprises the following steps: by using organic montmorillonite as a physical crosslinking agent, introducing dendriform polymer into the poly(N-isopropylacrylamide) aquagel, and compounding the two polymers by using an atom transfer radical polymerization (ATRP) technique to obtain the dendriform organic montmorillonite reinforced aquagel. Compared with the prior art, in the prepared dendriform organic montmorillonite crosslinked gel structure, the phyllosilicate does not exist in the gel in the form of simple physical compounding, but exists in the form of a compound crosslinking agent to crosslinking the organic polymers into the network structure, thereby greatly enhancing the strength, elongation at break and swelling rate of the gel.

Description

technical field [0001] The invention relates to a preparation method of hydrogel, in particular to a preparation method of dendritic organic montmorillonite reinforced hydrogel. Background technique [0002] Hydrogel is a moderately cross-linked hydrophilic polymer that swells but does not dissolve in water. Hydrogels are biocompatible and have good responsiveness to external stimuli such as pH, temperature, and electric fields, and are used in bioseparation, pharmaceutical sustained release, and other fields. The swelling ability and gel strength of hydrogel are important indicators to measure the gel performance. In terms of improving gel strength, there are currently three representative gels: topological gels, nanocomposite gels, and double network gels. In contrast, the organic-inorganic nanocomposite method can improve the comprehensive performance of the gel. This field involves interdisciplinary subjects such as organic-inorganic and polymers, and is a current rese...

AI Technical Summary

Problems solved by technology

The dendritic polymer has a three-dimensional internal porous structure, and the surface is enriched with a large number of end groups, so that the macromolecule has better reactivity; due to the precise molecular structure, the dendritic polymer is difficult to crystallize and has no chain entanglement, so it dissolves However, how to apply dendrimers to the preparation process of gel has not been reported yet. For example, the Chinese patent application number 200910154771.5 discloses sol-gel modified organomontmorillonite and Silicone sol-gel for modification, the silicone sol-gel is prepared by sol-gel method using silicone quaternary ammonium salt and silicone containing active functional groups

It also discloses sol-gel modified organic montmorillonite, which is prepared by adding the above-mentioned organosilicon sol-gel into montmorillonite slurry, separating and drying after cation exchange intercalation reaction, but This patent also does not disclose the technical scheme that the application of dendritic polymers in gel polymerization will have a certain impact on improving gel performance.