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Self-healing mechanochromic intelligent hydrogel and preparation method thereof

A technology of photochromic and hydrogel, which is applied in the fields of color-changing fluorescent materials, chemical instruments and methods, luminescent materials, etc., can solve the problems of few types of mechanochromic materials, poor tunability of mechanical properties, complicated preparation, etc., to expand the application. Potential and scope, good self-healing properties, effect of improving overall performance

Active Publication Date: 2022-01-14
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its development is still far behind some other stimuli-responsive color-changing materials (such as photochromic materials and electrochromic materials). The main problems are that there are fewer types of mechanochromic materials, complex preparation processes, and adjustable mechanical properties. Poor performance, single function, etc.
At the same time, since most mechanochromic compounds are hydrophobic, it is difficult to be integrated into a highly hydrophilic hydrogel system
[0004] In the reported literature of mechanochromic hydrogels, there are common problems such as complicated preparation, poor universality, and inability to self-heal.
An efficient and universal approach to prepare self-healing mechanochromic smart hydrogels is still lacking at this stage

Method used

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  • Self-healing mechanochromic intelligent hydrogel and preparation method thereof
  • Self-healing mechanochromic intelligent hydrogel and preparation method thereof
  • Self-healing mechanochromic intelligent hydrogel and preparation method thereof

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Effect test

Embodiment 1

[0033] A preparation method of self-healing mechanochromic intelligent hydrogel, comprising the following steps:

[0034] Step 1: Add 160mg of functional fluorescent monomer 1 and 20mg of methyl acrylate monomer into 10mL of sodium chloride (0.5g) solution containing sodium lauryl sulfate (0.5g), stir well, and let stand for 2 Hour, obtain micellar solution;

[0035] Functional fluorescent monomer 1:

[0036]

[0037] Wherein, the functional fluorescent monomer 1 is synthesized according to the synthesis method in the published literature (Macromolecules, 2006, 39, 9581);

[0038] Step 2: Add 840 mg of acrylamide monomer and 15 mg of ammonium persulfate initiator to the above micellar solution, and mix well to obtain a prepolymerization solution;

[0039] Step 3: Put the above-mentioned pre-polymerization solution in a mold, place it in an oven at 45°C for 6 hours to heat-cure, and obtain a self-healing mechanochromic smart hydrogel, which is named; OPV-12.

Embodiment 2

[0041] A preparation method of self-healing mechanochromic intelligent hydrogel, comprising the following steps:

[0042] Step 1: Add 140mg of functional fluorescent monomer 2 and 20mg of methyl acrylate monomer into 10mL of sodium chloride (0.5g) solution containing sodium lauryl sulfate (0.5g), stir well (200rpm), Stand still for 2 hours to obtain micellar solution;

[0043] Functional fluorescent monomer 2:

[0044]

[0045] Wherein, the functional fluorescent monomer 2 is synthesized according to the synthesis method in the published literature (Macromolecules, 2006, 39, 9581);

[0046] Step 2: Add 840 mg of acrylamide monomer and 15 mg of ammonium persulfate initiator to the above micellar solution, and mix well to obtain a prepolymerization solution;

[0047] Step 3: Pour the above-mentioned pre-polymerization solution into a mold, place it in an oven at 45°C for 6 hours to heat-cure, and obtain a self-healing mechanochromic smart hydrogel, which is named; OPV-3.

Embodiment 3

[0049] A preparation method of self-healing mechanochromic intelligent hydrogel, comprising the following steps:

[0050] Step 1: Add 118mg of functional fluorescent monomer 3 and 20mg of methyl acrylate monomer into 10mL of sodium chloride (0.5g) solution containing sodium lauryl sulfate (0.5g), stir well, and let stand for 2 Hour, obtain micellar solution; (10mL sodium chloride solution containing sodium lauryl sulfate can calculate the solution of 10g)

[0051] Functional fluorescent monomer 3:

[0052]

[0053] Wherein, the functional fluorescent monomer 3 is synthesized according to the synthesis method in the published literature (Macromolecules, 2011, 44, 5764);

[0054] Step 2: Add 840 mg of acrylamide monomer and 15 mg of ammonium persulfate initiator to the above micellar solution, and mix well to obtain a prepolymerization solution;

[0055]Step 3: Pour the above-mentioned pre-polymerization solution into the mold, place it in an oven at 45°C for 6 hours to hea...

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Abstract

The invention belongs to the technical field of mechanochromic hydrogel, and discloses self-healing mechanochromic intelligent hydrogel and a preparation method thereof. The method comprises the steps: 1) mixing a functional fluorescent monomer, methyl acrylate and a sodium chloride solution of lauryl sodium sulfate to obtain a micelle solution; 2) uniformly mixing acrylamide, an initiator and the micelle solution to obtain a pre-polymerized solution; and 3) carrying out thermocuring on the pre-polymerized solution to obtain the self-healing mechanochromic hydrogel. The method disclosed by the invention is simple, and the obtained hydrogel is intelligent hydrogel which is cross-linked by non-covalent bonds in micelles. The hydrogel disclosed by the invention has the characteristics of high stretch rate, good room-temperature self-healing capability, diversified fluorescence colors and force-induced fluorescence discoloration. The intelligent hydrogel has potential application in the aspects of mechanical sensing, material damage detection and the like.

Description

technical field [0001] The invention belongs to the technical field of mechanochromic hydrogel materials, and in particular relates to a self-healing mechanochromic intelligent hydrogel and a preparation method thereof. Background technique [0002] Hydrogel is a three-dimensional network material that is hydrophilic but insoluble in water. As a soft material, it is sensitive to small external effects and has excellent biocompatibility. It is widely used in daily life. chemical, environmental, food and biomedical fields. According to the degree of sensitivity to environmental stimuli, hydrogels can be divided into traditional hydrogels that are insensitive to stimuli and environment-sensitive hydrogels that respond to stimuli (also known as smart hydrogels). Currently, smart hydrogels are one of the research hotspots in the field of hydrogel materials. As a class of stimuli-responsive materials, smart hydrogels can make corresponding responses (such as volume changes, colo...

Claims

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Application Information

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IPC IPC(8): C08J3/075C08F220/56C08F220/14C08F220/36C08F220/30C09K9/02C09K11/06C08L33/26
CPCC08J3/075C08F220/56C09K9/02C09K11/06C08J2333/26C09K2211/1416C09K2211/1425C08F220/14C08F220/36C08F220/301
Inventor 岳衎徐立国陈雨桐
Owner SOUTH CHINA UNIV OF TECH
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