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A kind of preparation method of nanocellulose/polyurethane foam composite elastomer

A technology of polyurethane foam and nanocellulose, which is applied in the field of preparation of cellulose composite materials, can solve the problems of inability to rebound, poor elasticity of cellulose foam/aerogel, etc., and achieve the effect of simple process

Inactive Publication Date: 2017-09-26
NORTHEAST FORESTRY UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the problem that cellulose foam / aerogel has poor elastic properties and cannot rebound after being compressed, and provides a preparation method of nano-cellulose / polyurethane foam composite elastomer

Method used

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  • A kind of preparation method of nanocellulose/polyurethane foam composite elastomer
  • A kind of preparation method of nanocellulose/polyurethane foam composite elastomer

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specific Embodiment approach 1

[0021] Specific embodiment one: the preparation method of a kind of nano-cellulose / polyurethane foam composite elastomer in this embodiment, is specifically carried out according to the following steps:

[0022] 1. The cellulose resource is made into powder, subjected to Soxhlet extraction, and then added to distilled water and mixed evenly to obtain a solid-liquid mixture;

[0023] 2. Add the solid-liquid mixture obtained in step 1 into the acidified sodium chlorite solution, and keep it for 0.5-2 hours under the condition of a constant temperature water bath with a controlled temperature of 50-100° C. to obtain the mixture;

[0024] 3. Repeat step 2 for 2 to 10 times, and then wash;

[0025] 4. Add the mixture obtained in step 3 into the alkaline solution, let it stand for 8-12 hours, then control the temperature at 70-100°C, keep it for 1-5 hours, then wash and drain, and then perform cleaning and suction filtration to obtain purified cellulose ;

[0026] 5. The purified ...

specific Embodiment approach 2

[0029] Embodiment 2: This embodiment differs from Embodiment 1 in that the cellulose resource in step 1 is lignocellulose resource. Others are the same as in the first embodiment.

[0030] Lignocellulosic resources include wood, bamboo, cotton, hemp, and agricultural and forestry residues, as well as biological materials containing cellulose such as bacterial cellulose materials and sea squirts.

specific Embodiment approach 3

[0031] Embodiment 3: This embodiment is different from Embodiment 1 in that: in step 1, the extraction temperature is controlled to be 90°C. Others are the same as in the first embodiment.

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Abstract

A preparation method of nano-cellulose / polyurethane foam composite elastic body, the invention relates to a preparation method of cellulose composite material. The invention aims to solve the problem that the cellulose foam / aerogel has poor elastic properties and cannot rebound after being compressed. Method: 1. Powder making, extraction treatment, adding distilled water; 2-3, lignin removal; 4, hemicellulose removal; , followed by drying. The nanocellulose / polyurethane foam composite elastic body prepared by the invention not only has the high adsorption property of the nanocellulose, but also retains the good elastic properties of the polyurethane foam. It can be widely used in the fields of nanoparticle template materials, oil-water separation materials, conductive composite materials, and filter materials.

Description

technical field [0001] The invention relates to a preparation method of a cellulose composite material. Background technique [0002] As a natural organic polymer material, nanocellulose contains a large number of hydroxyl groups on the surface, which provides sites for the combination of nanoparticles, etc., has strong adsorption, and has high Young's modulus, high strength, With the advantages of high specific surface area, ultra-fine structure, and low thermal expansion coefficient, it has great application prospects in the fields of polymer nanocomposites, flexible optoelectronic devices, and food packaging. In recent years, the technology of using nanocellulose as the basic building block to prepare lightweight, porous, flexible foam / aerogel and other materials has attracted increasing attention. However, due to the large number of hydroxyl groups on the surface of nanocellulose, the nanocellulose foam / aerogel is not elastic and cannot rebound after extrusion, which li...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L75/04C08L1/02C08J9/28
Inventor 陈文帅赵苑竹于海鹏全志超张奇严悦张亚男刘一星
Owner NORTHEAST FORESTRY UNIVERSITY
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