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Self-healing sulfobetaine zwitterionic nano composite aquagel and preparation method thereof

A technology of sulfobetaine and zwitterion, applied in sulfonate preparation, organic chemistry and other directions, can solve the problems of increasing the difficulty of experimental equipment, unfavorable industrial production, high price, etc., and achieves lower synthesis cost and good self-healing performance. , the effect of high synthesis yield

Inactive Publication Date: 2015-04-08
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the process of in-situ polymerization of monomers induced by ultraviolet light, the technology of this paper requires a continuous nitrogen protection atmosphere, which increases the difficulty of building experimental equipment; at the same time, in order to synthesize carboxybetaine-type zwitterionic monomers, the technology uses β-propiolactone is used as raw material, and β-propiolactone is highly toxic and expensive, which is not conducive to industrial production
Copolymerization of sulfobetaine-type zwitterionic compounds with HEMA to prepare organic / inorganic nanocomposite hydrogels has not been reported

Method used

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  • Self-healing sulfobetaine zwitterionic nano composite aquagel and preparation method thereof
  • Self-healing sulfobetaine zwitterionic nano composite aquagel and preparation method thereof
  • Self-healing sulfobetaine zwitterionic nano composite aquagel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] (1) Synthesis of sulfobetaine-type zwitterionic monomer: 17.02g (0.1mol) N,N'-dimethylaminopropyl methacrylamide, 8.51g acetone and 0.02g hydroquinone were added to In the flask, while stirring, add dropwise 2.44g (0.02mol) 1,3-propane sultone in 1.22g acetone solution, and the dropwise addition is completed within 0.5 hours, and react for 48 hours at 0°C; restore the reaction system to At room temperature, filter and wash with acetone 3 times to remove unreacted N,N'-dimethylaminopropyl methacrylamide, 1,3-propane sultone and hydroquinone to obtain a white solid A, yield It is 87.6%. After infrared and hydrogen nuclear magnetic resonance analysis, the structure of product A is as follows:

[0046]

[0047] figure 1 It is the infrared spectrum of product A. It can be seen from the figure that the infrared spectrum of product A is at 1197cm -1 -SO appears everywhere 3 The asymmetric stretching vibration peak of S═O in S═O is at 1041 cm -1 -SO appears everywhere 3 S=O symme...

Embodiment 2

[0056] (1) Synthesis of sulfobetaine-type zwitterionic monomer: 15.62g (0.1mol) N,N'-dimethylaminopropylacrylamide, 31.24g acetonitrile and 1.80g 2,2,6,6 Tetramethylpiperidine nitroxide radical was added to the flask, and 20.40g (0.15mol) 1,4-butane sultone in 40.80g acetonitrile solution was added dropwise while stirring. The addition was completed within 1 hour, 100°C Under the conditions, react for 1 hour; reduce the reaction system to room temperature, filter and wash with acetonitrile 3 times to remove unreacted N,N'-dimethylaminopropyl acrylamide, 1,4-butane sultone and 2 ,2,6,6-Tetramethylpiperidine nitroxide radicals to obtain white solid B with a yield of 90.4%. After infrared and hydrogen nuclear magnetic resonance analysis, the structure of product B is shown below.

[0057]

[0058] The infrared spectrum and hydrogen nuclear magnetic resonance spectrum of the sulfonic acid zwitterionic compound prepared in this embodiment figure 1 , figure 2 Consistent and will not ...

Embodiment 3

[0063] (1) Synthesis of sulfobetaine-type zwitterionic monomer: 21.9g (0.1mol) 1-(N,N'-diethylamino)-4(acrylate)-benzene, 21.9g methyl ethyl Ketone and 0.355g of β-phenylnaphthylamine were added to the flask, and 13.6g (0.1mol) of 2,4-butane sultone in 13.6g of methyl ethyl ketone was added dropwise while stirring, and dropped within 2 hours After the addition is complete, react for 24 hours at 50°C; reduce the reaction system to room temperature, filter and wash with methyl ethyl ketone 3 times to remove unreacted 1-(N,N'-diethylamino)-4( Acrylate group)-benzene, 2,4-butane sultone and β-phenylnaphthylamine, white solid C was obtained, and the yield was 85.0%. After infrared and hydrogen nuclear magnetic resonance analysis, the structure of product C is as follows:

[0064]

[0065] The infrared spectrum and hydrogen nuclear magnetic resonance spectrum of the sulfonic acid zwitterionic compound prepared in this embodiment figure 1 , figure 2 Consistent and will not be repeated...

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Abstract

The invention discloses a self-healing sulfobetaine zwitterionic nano composite aquagel and a preparation method thereof. The aquagel is composed of a polymer matrix (accounting for 60-99 wt% of dried gel) and an inorganic component (accounting for 1-40 wt% of dried gel). The preparation method comprises the following steps: preparing a sulfonic acid zwitterionic compound, preparing a prepolymerization reaction solution, dissolving the inorganic component, sulfonic acid zwitterionic compound, hydroxyethyl methacrylate (HMEA) monomer and photoinitiator in deionized water until the mixed solution is dispersed uniformly, and finally, carrying out polymerization reaction for 1-3 hours under photoinitiation conditions, thereby obtaining the sulfobetaine zwitterionic nano composite aquagel. The prepared aquagel can implement self-healing without any external stimulus or specific environment requirement, and has excellent physical and mechanical properties.

Description

Technical field [0001] The invention relates to a polymer hydrogel, in particular to a self-healing sulfobetaine type zwitterionic nano composite hydrogel and a preparation method thereof. Background technique [0002] The polymer hydrogel is a three-dimensional network structure polymer that can absorb and retain a large amount of water. The chemical cross-linking or physical cross-linking structure existing inside it can only swell but not dissolve. Polymer hydrogel has excellent viscoelasticity, high moisture content and water retention rate, and good biocompatibility. It can be used in agriculture, construction, chemical industry, food engineering, biomedicine and other fields. However, because polymer hydrogels contain a lot of water, they will be damaged due to low strength when subjected to tensile or compressive stress. Most of the polymer hydrogels currently prepared will break under extremely low pressure. , Its strength and deformability are difficult to meet the requ...

Claims

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Application Information

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IPC IPC(8): C08F220/60C08F220/28C08F220/36C08F2/44C08F2/48C08K3/34C08J3/075C07C309/14C07C303/32
Inventor 李光吉王立莹林殷雷陈志锋张子勋
Owner SOUTH CHINA UNIV OF TECH
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