Preparation method of dendriform organic montmorillonite reinforced aquagel

An organic montmorillonite and dendritic technology, which is applied in the field of preparation of dendritic organic montmorillonite reinforced hydrogel, can solve the problems of difficulty in crystallization, improve gel properties without disclosure, and achieve the effect of improving strength

Active Publication Date: 2014-09-03
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 mo

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Add 10g of organic montmorillonite to a four-neck flask, place it in an ice-water bath, add 1mol of triethylamine, then drop 1mol of 2,2-bromoisobutyryl bromide into the solution, and react for 2 hours at 20°C After 48 hours, the product was washed with ethanol, and finally the obtained product was centrifuged, and then vacuum-dried to obtain brominated organic montmorillonite.

[0034] Add 0.10mol methyl acrylate, 0.10mol diethanolamine and 10mL methanol into a four-neck flask, and the mixture is 2 After stirring for 30 minutes under normal conditions, the temperature was raised to 20°C and kept for 5 hours, and then vacuumed to remove methanol to obtain a colorless transparent oil, ie, methyl N,N-dihydroxyethyl-3-aminopropionate.

[0035] Add 10 g of brominated organomontmorillonite, 15 mg of CuCl, and 40 mg of N, N-dihydroxyethyl-3-aminopropionic acid methyl ester into 5 mL of a mixed solvent of tetrahydrofuran and methanol, and pass N 2 After 30 minutes, react at 2...

Embodiment 2

[0039] Add 15g of organic montmorillonite to a four-neck flask, place it in an ice-water bath, add 1mol of triethylamine, then add 1.5mol of 2,2-bromoisobutyryl bromide dropwise to the solution, and react for 3 hours at 30°C After reacting for 36 hours, the product was washed with ethanol, and finally the obtained product was centrifuged, and then vacuum-dried to obtain brominated organic montmorillonite.

[0040] Add 0.20mol methyl acrylate, 0.20mol diethanolamine and 15mL methanol into a four-neck flask, and the mixture is 2After stirring for 40 minutes under normal conditions, the temperature was raised to 30°C and kept for 4 hours, and then vacuumed to remove methanol to obtain a colorless transparent oil, ie, methyl N,N-dihydroxyethyl-3-aminopropionate.

[0041] Add 15g of brominated organomontmorillonite, 20mg of CuCl, and 50mg of N,N-dihydroxyethyl-3-aminopropionic acid methyl ester into a mixed solvent of 10mL of tetrahydrofuran and methanol, and pass N 2 After 30 min...

Embodiment 3

[0045] Add 20g of organic montmorillonite to a four-neck flask, place it in an ice-water bath, add 1mol of triethylamine, then drop 2mol of 2,2-bromoisobutyryl bromide into the solution, react for 4 hours, and then react at 40°C After 24 hours, the product was washed with ethanol, and finally the obtained product was centrifuged, and then vacuum-dried to obtain brominated organic montmorillonite.

[0046] Add 0.30mol methyl acrylate, 0.30mol diethanolamine and 20mL methanol into a four-neck flask, and the mixture is 2 After stirring for 50 minutes under normal conditions, the temperature was raised to 40°C and kept for 3 hours, and then vacuumed to remove methanol to obtain a colorless transparent oil, ie, methyl N,N-dihydroxyethyl-3-aminopropionate.

[0047] Add 20 g of brominated organomontmorillonite, 25 mg of CuCl, and 60 mg of N, N-dihydroxyethyl-3-aminopropionic acid methyl ester into 15 mL of a mixed solvent of tetrahydrofuran and methanol, and pass N 2 After 30 minute...

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PUM

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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...

Claims

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Application Information

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IPC IPC(8): C08F285/00C08F220/54C08F220/36
Inventor 王锦成刘瑜琦陈思浩楼建中甘文君张书华郑晓昱赵雯袁章林王军华曹付海张广建
Owner SHANGHAI UNIV OF ENG SCI
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