Preparation method of nanocellulose/acrylamide/graphene oxide self-healing hydrogel

A nanocellulose, healing hydrogel technology, applied in chemical instruments and methods, alkali metal compounds, alkali metal oxides/hydroxides, etc., can solve the problem of poor dye adsorption effect, non-reusable, low mechanical strength, etc. problems, to achieve the effect of inhibiting damage propagation, good mechanical properties, and improving safety

Active Publication Date: 2021-01-15
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention aims to solve the problems of low mechanical strength, poor dye adsorption effect, non-recyclable and non-self-healing problems of existing cellulose hydrogels, and provides a nano-cellulose / acrylamide / graphene oxide self-healing hydrogel preparation method

Method used

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  • Preparation method of nanocellulose/acrylamide/graphene oxide self-healing hydrogel
  • Preparation method of nanocellulose/acrylamide/graphene oxide self-healing hydrogel

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specific Embodiment approach 1

[0037] Specific embodiment one: present embodiment a kind of preparation method of nanocellulose / acrylamide / graphene oxide self-healing hydrogel, it is carried out according to the following steps:

[0038] 1. Delignification:

[0039] ①. Prepare cellulose raw material into powder;

[0040] ②. Immerse the powder in NaOH and NaOH 2 SO 3 mixed solution, and heated in a water bath at a temperature of 90°C to 100°C for 1h to 10h, and then poured out the waste liquid to obtain NaOH and NaOH 2 SO 3 processed powder;

[0041] The NaOH and Na 2 SO 3 The mixed solution is a NaOH solution with a concentration of 0.01mol / L to 10mol / L and a NaOH solution with a concentration of 0.01mol / L to 10mol / L. 2 SO 3 The solution is mixed according to the volume ratio of 1: (0.1 ~ 10);

[0042] ③, NaOH and Na 2 SO 3 The treated powder is boiled with deionized water for 0.5h~5h, and then the waste liquid is poured out;

[0043] ④. Replace the deionized water, then repeat step 1 ③ until the ...

specific Embodiment approach 2

[0059] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the particle size of the powder described in step ① is 0.1mm-2mm. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0060] Embodiment 3: This embodiment is different from Embodiment 1 or 2 in that: the cellulose raw material described in Step ① is bamboo, balsa wood or absorbent cotton. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a preparation method of nanocellulose / acrylamide / graphene oxide self-healing hydrogel, which relates to a preparation method of hydrogel. The problems that existing cellulose hydrogel is low in mechanical strength, poor in dye adsorption effect and incapable of being repeatedly used and self-healing are solved. The preparation method comprises the following steps of 1, removing lignin, 2, preparing a cellulose dispersion liquid, 3, preparing a nanocellulose-graphene oxide mixed solution, and 4, preparing the hydrogel. The preparation method is used for preparing the nanocellulose / acrylamide / graphene oxide self-healing hydrogel.

Description

technical field [0001] The invention relates to a preparation method of hydrogel. Background technique [0002] Cellulose can be isolated from abundant biomass resources in nature (including plants, microorganisms, and animals). For plant cellulose, except for a small part in the form of high purity (such as cotton fiber and kapok fiber), cellulose is often combined with hemicellulose, pectin and lignin as the main structural components of plant cell walls. Lignocellulose is a cellulose resource produced by trees through photosynthesis, and the content of cellulose in wood is about 40% to 50%. Lignocellulose is widely stored in wood fibers in wood cell walls, and lignocellulose, as a raw material for traditional forestry engineering and wood processing industries, has problems such as overcapacity and low added value. At the same time, with the depletion of petroleum resources and the increasingly serious environmental pollution, green biomass resources such as lignocellul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/075C08L1/02C08L33/26C08K3/04C08F220/56C08F220/06C08F222/38B01J20/26B01J20/24B01J20/28B01J20/30
CPCC08J3/075C08F220/56B01J20/261B01J20/24B01J20/28047C08J2301/02C08J2433/26C08K3/042C08F220/06C08F222/385
Inventor 万才超张陆雨吴义强魏松刘心怡田文燕程文杰苏嘉慧
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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