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Stress response type optical hydrogel as well as preparation method and application thereof

A hydrogel and stress technology, which is applied in the field of stress-responsive optical hydrogel and its preparation, can solve the problems of low stretching degree, narrow color range, uneven color development of mechanically responsive materials, etc., and achieve tensile properties Good, good biodegradability, good interfacial compatibility

Active Publication Date: 2021-07-23
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reported mechanically responsive materials still have problems such as uneven color development, narrow color range, and low degree of stretching.

Method used

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  • Stress response type optical hydrogel as well as preparation method and application thereof
  • Stress response type optical hydrogel as well as preparation method and application thereof
  • Stress response type optical hydrogel as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A stress-responsive optical hydrogel, the preparation method of which is as follows:

[0029] The cellulose nanocrystal suspension with a concentration of 1wt% was ultrasonically treated at 600W for 10min, and 15mL of the sonicated suspension was taken, and filtered with a nylon filter membrane with a pore size of 0.22μm under a vacuum of 0.6bar to produce chiral cellulose Nanocrystalline film (thickness: 77.5 μm), take a chiral cellulose nanocrystalline film (0.075 g) with a size of 15 mm × 20 mm, sandwich it up and down with two glass slides with a size of 25 mm × 35 mm, soak it in 6 mL of acrylamide and acrylic acid precursor body solution (solution composition and mass percentage are: acrylamide 10%, acrylic acid 10%, N,N-methylenebisacrylamide 0.1%, photoinitiator 2959 0.15%, and the balance is water) for five minutes Then, UV light polymerization was carried out for 2 h under a UV lamp with a power of 40 W and a wavelength of 365 nm to obtain a stress-responsive p...

Embodiment 2

[0035] A stress-responsive optical hydrogel, the preparation method of which is as follows:

[0036] The cellulose nanocrystal suspension with a concentration of 2wt% was subjected to 600W ultrasonic treatment for 10min, and 15mL of the ultrasonic suspension was taken, and a nylon filter membrane with a pore size of 0.22 μm was suction-filtered under a vacuum of 0.6bar to prepare a 477nm screw pitch. Chiral cellulose nanocrystalline membrane (186.3 μm in thickness), take a 15mm×20mm chiral cellulose nanocrystalline membrane (0.15g) and clamp it up and down with two 25mm×35mm glass slides, soak it in 6mL acrylic Amide and acrylic acid precursor solution (solution composition and mass percentage are: acrylamide 10%, acrylic acid 10%, N,N-methylenebisacrylamide 0.1%, photoinitiator 29590.15%, and the balance is water) After swelling for five minutes, UV light polymerization was carried out for 2 h under a UV lamp with a power of 40 W and a wavelength of 365 nm to obtain a stress-...

Embodiment 3

[0040] A stress-responsive optical hydrogel, the preparation method of which is as follows:

[0041] The cellulose nanocrystal suspension with a concentration of 1wt% was ultrasonically treated at 400W for 10min, and 15mL of the supersonic suspension was taken, and filtered with a nylon filter membrane with a pore size of 0.22μm under a vacuum of 0.6bar to prepare a 477nm screw pitch. Chiral cellulose nanocrystalline membrane (thickness is 83.3 μm), take a chiral cellulose nanocrystalline membrane (0.075g) with a size of 15mm×20mm, clamp it up and down with two glass slides with a size of 25mm×35mm, soak it in 6mL of acrylic Amide and acrylic acid precursor solution (solution composition and mass percentage are: acrylamide 10%, acrylic acid 10%, N,N-methylenebisacrylamide 0.1%, photoinitiator 29590.15%, and the balance is water) After swelling for five minutes, UV light polymerization was carried out for 2 h under a UV lamp with a power of 40 W and a wavelength of 365 nm to ob...

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Abstract

The invention relates to stress response type optical hydrogel as well as a preparation method and an application thereof. The hydrogel is obtained by swelling a chiral cellulose nanocrystal film obtained by suction filtration of a cellulose nanocrystal suspension with a precursor solution containing acrylamide and acrylic acid and then carrying out ultraviolet polymerization compounding. The stress response type optical hydrogel provided by the invention takes the natural polymer cellulose nanocrystal as a color developing component, the raw materials can be recycled and regenerated, the biodegradability is good, the hydrogel has good tensile property and uniform color development, and the stress response type optical hydrogel has good stress sensing performance and information storage and display functions; and the screw pitch of the chiral cellulose nanocrystalline film can be adjusted by adjusting preparation process conditions, so that the mechanical response range and the color development degree of the optical hydrogel are controlled.

Description

technical field [0001] The invention belongs to the technical field of polymer gels, and in particular relates to a stress-responsive optical hydrogel and its preparation method and application. Background technique [0002] As one of the most wonderful phenomena in nature, structural color is mainly produced by the interference of periodic nanostructures on light, and can often be found in animals and plants. Different from pigment color, if the nanostructure can be maintained, structural color materials have the remarkable characteristics of environmental protection, color fastness and high stability. In nature, some organisms are even capable of rapidly changing color reversibly for camouflage, mating and colony defense. Among them, the chameleon is one of the most important representatives, which can change color according to the environment by relaxing / stimulating the skin and adjusting the structure of guanine crystals. In the past few decades, inspired by these inte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/075C08L1/04C08L33/26C08F220/56C08F220/06C08F222/38
CPCC08J3/075C08F220/56C08F220/06C08J2301/04C08J2333/26C08F222/385
Inventor 常春雨黄达
Owner WUHAN UNIV
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