Hydrogel with self-repairing function and preparation method of hydrogel

A hydrogel, self-healing technology, applied in organic chemistry and other directions, can solve the problems of reduced hydrogel strength, water retention and spatial limitation of strength, etc., to achieve improved water retention, good shape memory function, and rich selection of raw materials. Effect

Active Publication Date: 2015-09-09
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the hydrogen bond units of the above-mentioned hydrogel are on the main chain of the polymer. As the molecular chain of polyethylene glycol increases, the cross-linking point density of the polymer decreases, and the strength of the hydrogel also decreases. , so there is a certain limit in the space for improving water retention and strength at the same time

Method used

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  • Hydrogel with self-repairing function and preparation method of hydrogel
  • Hydrogel with self-repairing function and preparation method of hydrogel
  • Hydrogel with self-repairing function and preparation method of hydrogel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Step 1, the synthesis of compound A

[0034] First, 10 g of PEG and 2.2 g of triethylamine were added into a 100 mL round bottom flask, dissolved in 60 mL of dichloromethane, and cooled to 0 °C in an ice bath. Then slowly add 3.68g of 2-bromoisobutyryl bromide diluted with 5mL of dichloromethane dropwise into the round bottom flask, stir, and react at room temperature for 24h after the dropwise addition is completed. Triethylamine hydrochloride, repeated twice, and then precipitated with ether 2 to 3 times, then dried under vacuum at 40°C for 12 hours after suction filtration, and the product was a brown solid. The molecular weight of PEG used in this example is 2000 g / mol.

[0035] The NMR hydrogen of compound A ( 1 HNMR) spectrogram such as figure 1 As shown, δ~3.75ppm is the peak of methylene group on PEG, and δ~1.45ppm is the peak of methyl group on isobutyryl group.

[0036] Step 2, the synthesis of compound B

[0037] Add 1.5g MIC to a 100mL round bottom flas...

Embodiment 2

[0042] Step 1, the synthesis of compound A was synthesized with reference to Example 1, wherein the molecular weight of PEG was 4000 g / mol.

[0043] Step 2, the synthesis of compound B is the same as in Example 1.

[0044] Step 3, Synthesis of Compound C Referring to Example 1, the amount of Compound A used is 0.4 g.

Embodiment 3

[0046] Step 1, the synthesis of compound A was synthesized with reference to Example 1, wherein the molecular weight of PEG was 6000 g / mol.

[0047] Step 2, the synthesis of compound B is the same as in Example 1.

[0048] Step 3, Synthesis of Compound C Referring to Example 1, the amount of Compound A used is 0.62 g.

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Abstract

The invention discloses hydrogel with a self-repairing function and a preparation method of the hydrogel. The hydrogel is a hydrophobic unit-UPy (ureido pyrimidinone)-PEG (polyethylene glycol)-UPy-hydrophobic unit polymer. According to the preparation method, firstly, an intermediate Br-PEG-Br and a quadruple hydrogen bonding unit intermediate UPyMA are synthesized and then are copolymerized with hydrophobic units such as butyl acrylate, styrene, methacrylate containing 3-10 carbon and the like, and a target polymer is obtained. The hydrogel has high water-retaining property, varieties of hydrogel with better performance can be prepared by adjusting the proportion of hydrophilic and hydrophobic chain segments in the polymer or changing the variety of a hydrophobic monomer, and the application range is enlarged.

Description

technical field [0001] The invention relates to the field of self-repairing materials, in particular to a hydrogel with self-repairing function and a preparation method thereof. Background technique [0002] In recent years, the preparation of hydrogels with self-healing function by synthesizing supramolecular polymers containing hydrogen bonds is an important direction for the study of self-healing materials. Due to the existence of multiple hydrogen bond units in the polymer, a reversible cross-linked network structure is formed inside the polymer, which will dissociate and recombine under the stimulation of the external environment, so as to achieve the purpose of self-healing. Hydrogel can absorb a large amount of water and swell, and has a good water retention effect. It has a certain similarity to biological tissues and has good biocompatibility, so it is widely used in construction, food, biomedicine and other fields. [0003] Most hydrogels are brittle, which limits...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F293/00C08G65/48C07D239/47
Inventor 戴李宗陈婷刘诚袁丛辉许一婷罗伟昂刘新瑜何凯斌
Owner XIAMEN UNIV
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