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Preparation method of NIPAM-based intelligent composite hydrogel

A composite hydrogel and hydrogel technology, applied in the field of polymer materials, can solve the problems of low cost, short cycle, poor mechanical properties of hydrogels, etc., and achieve the effects of low cost, short cycle and large selectivity

Inactive Publication Date: 2019-07-26
NANJING UNIV OF INFORMATION SCI & TECH
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  • Abstract
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  • Claims
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Problems solved by technology

[0004] Aiming at the problem of poor mechanical properties of hydrogels, the present invention proposes to use NIPAM as a polymerization monomer, GO nanosheets as an additive, and ZrO 2 As a reinforcing agent, PNIPAM-GO-ZrO was prepared by chemical synthesis 2 Smart hydrogel, the preparation process is simple, the cycle is short and the cost is low

Method used

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  • Preparation method of NIPAM-based intelligent composite hydrogel
  • Preparation method of NIPAM-based intelligent composite hydrogel
  • Preparation method of NIPAM-based intelligent composite hydrogel

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Embodiment Construction

[0019] Its technological process and steps are as follows:

[0020] 1. Preparation of graphite oxide: First, the mixed solution is composed of 2% flake graphite, 3% potassium nitrate and remaining concentrated sulfuric acid (98%) by mass percentage, and is added in sequence according to the order of concentrated sulfuric acid, flake graphite and potassium nitrate, and then Add 8% potassium permanganate to the above solution, and keep stirring at a temperature of 40° C. for 3 hours. Then deionized water was added to the solution to 100ml, and heated to a temperature of 70°C at 1000rpm. The rotation speed lasts for 30 minutes. Add 20ml of hydrogen peroxide into 400ml of deionized water and stir evenly, slowly pour the solution prepared above into the hydrogen peroxide solution and stir evenly. Use sodium hydroxide to adjust the pH value to 6, centrifuge in a centrifuge at 8000rpm for 30 minutes to obtain liquid and solid separation phases, and then use ethanol solution to cent...

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Abstract

The invention discloses a preparation method of NIPAM-based intelligent composite hydrogel. The NIPAM-based intelligent composite hydrogel is prepared by using NIPAM as the polymerization monomer, BISas the chemical crosslinking agent, potassium persulfate as the initiator, TEMED as the accelerant at 20 DEG C, GO nanosheets as the additive and ZrO2 as the enhancer to perform polymerization reaction according a certain proportion. The intelligent composite hydrogel has the advantages that the hydrogel is good in tensile property, and the problem that traditional hydrogel is poor in mechanicalstrength is solved; the hydrogel is good in temperature-sensitive performance, the volume of the hydrogel constantly degreases along with the rising of temperature, the volume suddenly changes at 30-35 DEG C and is gradually stabilized finally, and the hydrogel can have evident volume shrinkage under the irradiation of laser (500mW) of 808 nanometers and shows a good near infrared response characteristic.

Description

technical field [0001] The invention relates to a preparation method of a NIPAM-based intelligent composite hydrogel, belonging to the technical field of polymer materials. Background technique [0002] Soft matter-actuated materials are a class of materials that can move mechanically in response to external stimuli. As one of the soft matter-driven materials, smart hydrogel is a three-dimensional network composed of cross-linked hydrophilic polymer chains, which can respond to various external stimuli, such as light, temperature, pH, electric field or certain Chemical substances that greatly alter their volume or other properties. Due to the response to such stimuli, they have many notable potential applications, such as smart sensors / actuators, switches, drug carriers [8], artificial muscles, tissue engineering scaffolds, and chemical / biological separation platforms, etc. [0003] Light-responsive hydrogels are different from other stimuli-responsive hydrogel materials. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/54C08F222/38C08F2/44C08K3/22C08K3/04
CPCC08F2/44C08F220/54C08K3/042C08K3/22C08K2003/2244C08F222/385
Inventor 吴红艳黄珂费佳蕾王亚丹李婕馨仲秋雪陈一锋
Owner NANJING UNIV OF INFORMATION SCI & TECH
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