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Preparation method of nano-cellulose-reinforced cellulose sponge

A technology of nanocellulose and cellulose sponge is applied in the field of preparation of nanocellulose-enhanced cellulose sponge, which can solve the problems of poor effect, complicated preparation method and low strength of cellulose sponge, etc., so as to reduce the production cost and the reaction process. Simple, Superior Strength Effects

Active Publication Date: 2020-02-07
ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing preparation method is slightly complicated, and the strength of the cellulose sponge is not high, and the effect is poor.

Method used

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  • Preparation method of nano-cellulose-reinforced cellulose sponge
  • Preparation method of nano-cellulose-reinforced cellulose sponge
  • Preparation method of nano-cellulose-reinforced cellulose sponge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1: a kind of nanocellulose reinforced cellulose sponge preparation method, carry out according to the following steps:

[0029] a. Alkalinization: select lint within the range of 40-100 meshes as cellulose raw material, mix 1.3g of absolute dry lint with 3-8ml of 22% NaOH solution in parts by mass, and mix at room temperature (25°C) React for 5h to obtain sodium cellulose;

[0030] b. Yellowing: Take 0.9gCS 2 React with sodium cellulose for 2 hours at room temperature to obtain cellulose sulfonate;

[0031] c. Dissolving and aging: add 4ml of water to the cellulose sulfonate and mix for 55 hours to obtain sodium cellulose sulfonate solution;

[0032] d. Take 3ml of nano-cellulose solution with a concentration of 0.8% and cellulose sodium sulfonate solution and rotate and mix for 1 hour to obtain a mixed solution of nano-cellulose solution and cellulose sodium sulfonate;

[0033] e. Sponge molding: Mix the nano-cellulose solution obtained in step d with the...

Embodiment 2

[0034] Embodiment 2: a kind of nanocellulose reinforced cellulose sponge preparation method is carried out according to the following steps:

[0035]a. Alkalinization: select cotton linters within the range of 40-100 meshes as cellulose raw materials, mix 1 g of absolute dry cotton linters with 5 g of 20% NaOH solution in parts by mass, and react at room temperature for 4 hours to obtain sodium cellulose ;

[0036] b. Yellowing: take 1gCS 2 React with sodium cellulose for 2 hours at room temperature to obtain cellulose sulfonate;

[0037] c. Dissolving and aging: add 4g of water to the cellulose sulfonate and mix for 60 hours to obtain sodium cellulose sulfonate solution;

[0038] d. Mixing of nanocellulose and sodium cellulose sulfonate solution: take 2 g of 0.5% nanocellulose solution and cellulose sodium sulfonate solution and rotate and mix for 1 hour; obtain a mixed solution of nanocellulose solution and cellulose sodium sulfonate;

[0039] e. Sponge molding: Mix the m...

Embodiment 3

[0040] Embodiment 3: a kind of nanocellulose reinforced cellulose sponge preparation method, carry out according to the following steps:

[0041] a, alkalization: select lint in the range of 40-100 meshes as the cellulose raw material, get 1.2g absolute dry lint by mass and mix with 4g concentration of 18.5% NaOH solution, react at room temperature (25°C) for 3.5 h, obtain sodium cellulose;

[0042] b. Yellowing: take 1.2gCS 2 React with sodium cellulose for 3 hours at room temperature to obtain cellulose sulfonate;

[0043] c. Dissolving and aging: add 4 g of water to the cellulose sulfonate and mix for 52 hours to obtain sodium cellulose sulfonate solution;

[0044] d. Mixing of nanocellulose and sodium cellulose sulfonate solution: take 3g of 0.7% nanocellulose solution and sodium cellulose sulfonate solution and rotate and mix for 1.5h; obtain nanocellulose solution and mix sodium cellulose sulfonate solution;

[0045] e. Sponge molding: Mix the mixed solution obtained...

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Abstract

The invention discloses a preparation method of a nano-cellulose-reinforced cellulose sponge. The method comprises the following steps: a, performing alkaliization: taking 0.5-2 parts of absolutely dry cotton velvet, and 3-8 parts of a NaOH solution with a concentration of 17.5-25% in parts by mass for mixing, and carrying out a reaction at room temperature for 3-6 h to obtain sodium cellulose; b,performing sulfonation: taking 0.8-1.5 parts of CS2 and carrying out a reaction with sodium cellulose at room temperature for 1.5-4 h to obtain cellulose sulfonate; c, performing dissolution and aging: adding 4-6 parts of water into the cellulose sulfonate and then performing mixing for 48-72 h to obtain a sodium cellulose sulfonate solution; d, taking 1-5 parts of a nano-cellulose solution witha concentration of 0.2-1%, and performing rotational mixing with the sodium cellulose sulfonate solution for 0.5-2 h to obtain a mixed solution; and e, performing sponge molding: uniformly mixing themixed solution, obtained in the step d, of the nano-cellulose solution and the sodium cellulose sulfonate, with sodium phosphate at a mass ratio of 1:1-2, then performing pouring into a mold and placing the mold into an oven, carrying out a reaction at 65-90 DEG C for 6-24 h, and then performing full rinsing to obtain the cellulose sponge. The method can improve the strength performance of the cellulose sponge, and is convenient for processing and production.

Description

technical field [0001] The invention relates to the field of sponge preparation, in particular to a method for preparing a nanocellulose-reinforced cellulose sponge. Background technique [0002] Sponge is a general term for foam, and according to the different materials used, it can produce a variety of sponge products with different properties. Traditional sponge products are mainly synthetic resin sponges made of polyurethane and similar materials by foaming. The chemical name of the sponge is polyurethane foam material. It is divided into soft foam for furniture and hard foam for heat preservation. kind. There are also special-purpose sponge materials such as hemostatic sponges. Traditional sponges are made of polymer chemical materials, so the product itself has a certain degree of environmental pollution and cannot be regenerated. It is difficult to dispose of after use, and it is easy to cause pollution. At present, there are also reports in the literature that cel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L1/22C08L1/02C08B9/00C08J9/12
CPCC08J9/0061C08J9/125C08B9/00C08J2203/10C08J2301/22C08J2401/02C08J2301/02C08J2401/22
Inventor 许银超毛文浩韦明聪金光范寇顺利沙力争张学金
Owner ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY