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Preparation method of hydrogel material with multiple stimulation responses

A multi-stimuli-responsive, hydrogel technology, applied in the field of hydrogel material preparation, can solve the problems of independent and single information recording function, inability to effectively realize the effective erasure of recorded information and multiple reusable use, and achieve biocompatibility The effect of excellent sex and mild external stimulation

Pending Publication Date: 2022-03-18
衡阳市衡山科学城科技创新服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the information recording function is independent and single, and it cannot effectively realize the effective erasure of the recorded information and the repeated use

Method used

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  • Preparation method of hydrogel material with multiple stimulation responses
  • Preparation method of hydrogel material with multiple stimulation responses
  • Preparation method of hydrogel material with multiple stimulation responses

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Embodiment 1: A method for preparing a hydrogel material responsive to multiple stimuli, the prepared hydrogel material includes the following components in parts by mass:

[0043] 80-120 parts of isopropylacrylamide (NIPAM).

[0044] Nanocellulose (CNF) 0.1-0.25 parts.

[0045] N, N-methylenebisacrylamide (BIS) 0.8-1.2 parts.

[0046] 0.8-1.2 parts of 2-hydroxy-2-methylpropiophenone (UV-initiator).

[0047] 500-1000 parts of deionized water.

[0048] Isopropylacrylamide is used after purification, and the used polymerization mold is used after deoxidizing treatment.

[0049] The purification method of isopropylacrylamide is recrystallization method, including:

[0050] S1. Put 80-120 parts of NIPAM powder in 320-480 parts of n-hexane solution and stir at 35-55°C.

[0051] S2. After the NIPAM is completely dissolved, put the mixed solution in an ice-water bath for a period of time, and immediately carry out suction filtration when turbid precipitation occurs.

[0...

Embodiment 2

[0065] S1. Weigh 0.1 part of CNF in 1000 parts of deionized water according to the proportion, stir for 8 hours, and mix well.

[0066] S2. Weigh 100 parts of NIPAM, 1 part of BIS, and 0.01 part of UV-initiator in sequence according to the proportion, add them to the mixed solution in S1, and stir in an ice bath in the dark for 30 minutes, so that the reaction solution is evenly mixed. Subsequently, the reaction solution was placed in a vacuum oven for 5 min, and the oxygen in the system was removed under a vacuum environment.

[0067] The precursor solution after deoxygenation was injected into the mold of the polymerization mold, and placed in an ice-water bath, and the prepared multi-stimuli-responsive hydrogel material was obtained by ultraviolet polymerization for 1 hour, and the turbidity was obtained by differential scanning calorimetry. The critical phase transition temperature (LCST) of the region.

Embodiment 3

[0069] S1. Weigh 0.15 parts of CNF in 1000 parts of deionized water according to the proportion and stir for 8 hours, and mix well.

[0070] S2. Weigh 100 parts of NIPAM, 1 part of BIS, and 0.01 part of UV-initiator in sequence according to the proportion, add them to the mixed solution in S1, and stir in an ice bath in the dark for 30 minutes, so that the reaction solution is evenly mixed. Subsequently, the reaction solution was placed in a vacuum oven for 5 min, and the oxygen in the system was removed under a vacuum environment.

[0071] The precursor solution after deoxygenation was injected into the mold of the polymerization mold and placed in an ice-water bath, and the prepared multi-stimuli-responsive hydrogel material was obtained by ultraviolet polymerization for 1 hour. The critical phase transition temperature (LCST) of the turbid region was obtained by differential scanning calorimetry.

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Abstract

The invention discloses a preparation method of a hydrogel material with multiple stimulation responses, and relates to the technical field of polymer composite materials. The invention discloses a preparation method of a hydrogel material with multiple stimulation responses. The material for preparing the hydrogel material comprises the following components in parts by mass: 80-120 parts of isopropyl acrylamide; 0.1 to 0.25 part of nano cellulose; 0.8 to 1.2 parts of N, N-methylene bisacrylamide; and 0.8 to 1.2 parts of 2-hydroxy-2-methyl propiophenone. According to the preparation method of the hydrogel material with multiple stimulation responses, the used gel material is excellent in biocompatibility and mild in external stimulation, so that the hydrogel material has the characteristics of no toxicity and harmlessness. The used gel material can remove stimulation response substances through swelling of an aqueous solution, information erasing is achieved, and then the gel material can be recycled for multiple times. In a word, the prepared PNIPAM-based hydrogel information recording, self-encryption and decryption material can realize integration of a matrix and an encryption material, and shows multifunctional and reusable information processing capability.

Description

technical field [0001] The invention relates to the technical field of polymer composite materials, in particular to a method for preparing a hydrogel material responding to multiple stimuli. Background technique [0002] With the rapid development of modern technology, especially the more frequent updating of information technology, while enjoying the convenience brought by information technology, people also experience the corresponding troubles caused by information leakage, information pollution and other issues. Therefore, information encryption and decryption, as an information protection method, has been widely used in people's daily life. In the past two decades, various information protection technologies such as: information anti-counterfeiting, encryption-decryption, and corresponding information protection materials, such as: various fluorescent molecules, thermochromic, photochromic materials, etc. have emerged as the times require, bringing great benefits to hu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F251/02C08F220/54C08F222/38C08F2/48C08J3/075C08L51/02
CPCC08F251/02C08F2/48C08J3/075C08J2351/02C08F220/54C08F222/385
Inventor 陈玉洁陈震刘河洲李华
Owner 衡阳市衡山科学城科技创新服务有限公司
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