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Preparation method and test method of gop/cnf composite material with water-induced deformation memory function

A composite material and water-induced technology, which is applied in the direction of applying repeated force/pulsating force to test the strength of materials, can solve the problems of less research on deformation memory function, lack of preparation and acquisition of composite materials, etc., and achieve good thermal stability and deformation Excellent recovery ability

Active Publication Date: 2020-12-18
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0004] There have been many studies on the modification of cellulose by graphene oxide nanosheets, but most of them focus on structural enhancement, thermal stability improvement, adsorption purification, drug carrier, etc. There are relatively few studies on deformation memory function, especially water-induced Research on the deformation memory function of the existing technology, so the preparation and acquisition of composite materials with water-induced deformation memory function are lacking in the prior art

Method used

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  • Preparation method and test method of gop/cnf composite material with water-induced deformation memory function
  • Preparation method and test method of gop/cnf composite material with water-induced deformation memory function
  • Preparation method and test method of gop/cnf composite material with water-induced deformation memory function

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Effect test

Embodiment 1

[0049] 1. Cotton fiber pretreatment: crush 100g cotton fiber with a plant pulverizer (length 1-2mm), put it into 2000g sodium hydroxide (4wt%) aqueous solution, heat to 150°C for 2h, cool down to 80°C, Add 50 g of sodium hypochlorite for bleaching for 1 h, then repeatedly rinse with deionized water and filter (filter hole 5 μm) to prepare pretreated swollen cotton fibers and weigh 112.6 g.

[0050] 2. Preparation of CNF aqueous solution: Weigh 120g of acetic acid and acetic anhydride (50wt%, 50wt%) and add deionized water to form a mixed aqueous solution of acetic acid and acetic anhydride (about 1200ml) containing 10wt%, add 0.24g of concentrated sulfuric acid (95% v / v) as a catalyst, and then put the above-mentioned swollen cotton fiber into the above-mentioned pre-prepared mixed aqueous solution of acetic acid and acetic anhydride, carry out ultrasonication in a water bath at 50°C and fully hydrolyze and partially acetylate the reaction (frequency 100Hz, power 600-1000w) 1...

Embodiment 2

[0060] 1. According to the implementation step 1, 100g of cotton fiber is crushed with a plant pulverizer (length 1-2mm), put into 2000g of sodium hydroxide (4wt%) aqueous solution, heated to 150°C for 2h, cooled to 80°C, Add 50 g of sodium hypochlorite for bleaching for 1 hour, then repeatedly rinse with deionized water and filter (filter hole 5 μm) to prepare pretreated swollen cotton fibers and weigh 112.6 g.

[0061] 2. Preparation of CNF aqueous solution: Measure 120g of acetic acid and acetic anhydride (50wt%, 50wt%) and add deionized water to form a mixed aqueous solution of 10wt% acetic acid and acetic anhydride (about 1200ml), add 0.24g of concentrated sulfuric acid (95% v / v) as a catalyst, then put the above-mentioned swollen cotton fiber into the above-mentioned mixed aqueous solution of acetic acid and acetic anhydride, carry out ultrasonication in a water bath at 50°C and fully hydrolyze and partially acetylate (frequency 100Hz, power 600-1000w) for 120min . The...

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Abstract

The invention discloses a preparation method of a GOP / CNF composite material with a water-induced deformation memory function. The preparation method comprises the steps of firstly, preparing one-dimensional cellulose nanofibers (CNF) from cotton fibers as a raw material, then adding a certain mass ratio of two-dimensional graphene oxide nanoplates (GOP), mixing the two through solution casting, performing phase separation regeneration by using ethanol as a coagulant to form a gel with GOP plate-like intercalation and CNF entanglement crosslinker, and forming the GOP / CNF composite sheet material through hot pressing. The composite material prepared by the method not only has the advantages of certain tensile breaking strength, certain elongation at break and good thermal stability, but also has the water-induced deformation memory function, and can be widely applied in the fields of biomedicines, biosensors, smart wears and the like.

Description

technical field [0001] The technical category of the present invention is a composite material with a water-induced deformation memory function, and in particular relates to a preparation method and a test method of a GOP / CNF composite material with a water-induced deformation memory function. Background technique [0002] As the most abundant renewable material in nature, cellulose has good biocompatibility, biodegradability, and certain mechanical properties. It is widely used in biomedicine, textile and clothing, food, papermaking and other fields. Nanocellulose is a nanomaterial with higher crystallinity and smaller scale separated from cellulose with the development of nanotechnology. Compared with ordinary cellulose materials, its mechanical properties and optical properties reflect the nanometer scale. brought advantages. However, the ubiquitous shortcomings of cellulose materials such as poor thermal stability, poor elasticity and elastic recovery, and degradation o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L1/10C08L39/06C08K3/04C08J5/18G01N3/32
CPCC08J5/18C08J2301/10C08J2439/06C08K2201/011C08K3/042G01N3/32
Inventor 刘琳刘逸新姚菊明李震
Owner ZHEJIANG SCI-TECH UNIV
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