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Preparation method of lignocellulose foam material

A technology of lignocellulose and foam materials, which is applied in the field of preparation of cellulose foam materials, can solve the problems of high cost, and achieve the effects of reducing preparation costs, simple preparation methods, and low prices

Inactive Publication Date: 2013-06-05
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of high cost in the preparation method of existing cellulose foam materials, and provide a kind of preparation method of lignocellulosic foam materials

Method used

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  • Preparation method of lignocellulose foam material
  • Preparation method of lignocellulose foam material
  • Preparation method of lignocellulose foam material

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specific Embodiment approach 1

[0012] Specific Embodiment 1: This embodiment is a preparation method of lignocellulose foam material, which is completed according to the following steps: 1. Crushing: mechanically crushing lignocellulose to obtain 20-200 mesh wood flour; 2. Grinding and dispersing: add 20-200 mesh wood flour into water, and then grind and disperse. The grinding and dispersing time is 30min-48h, and then the lignocellulose aqueous dispersion is obtained; 3. Freeze drying: freeze the lignocellulose aqueous dispersion After drying, the lignocellulosic foam material is obtained.

[0013] The lignocellulose described in step 1 is forest waste, plant stem, waste newspaper, cotton, hemp, animal hair, waste silk, spider silk, bamboo, straw or bagasse.

[0014] The mass ratio of the 20-200 mesh wood powder and water described in step 2 is 1:(10-1000).

specific Embodiment approach 2

[0015] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is: the mechanical pulverization described in step 1 is high-speed pulverization or ball mill pulverization. Others are the same as the first embodiment.

specific Embodiment approach 3

[0016] Specific embodiment three: the difference between this embodiment and specific embodiment two is: the specific operation of the high-speed pulverization is as follows: put the lignocellulose into a high-speed pulverizer, and then grind the lignocellulose at a speed of 5000r / min to 20000r / min. Carry out high-speed crushing under conditions until the particle size of the lignocellulose reaches 20-200 mesh, that is, wood powder of 20-200 mesh is obtained. Others are the same as in the second embodiment.

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Abstract

The invention relates to a preparation method of a cellulose foam material, particularly a preparation method of a lignocellulose foam material. The invention aims to solve the problem of high cost in the existing preparation method of a cellulose foam material. The method comprises the following steps: 1. pulverizing lignocellulose to 20-200-mesh wood meal; 2. adding the 20-200-mesh wood meal into water, and dispersing by grinding to obtain a lignocellulose water dispersion solution; and 3. carrying out freeze-drying on the lignocellulose water dispersion solution to obtain the lignocellulose foam material. The invention has the following advantages: 1. the preparation method is simple, and utilizes low-price raw materials, thereby lowering the preparation cost; 2. the invention can not bring about any pollution, and is green and environment-friendly; and 3. the lignocellulose foam material has huge application prospects. The invention is mainly used for preparing the lignocellulose foam material.

Description

technical field [0001] The invention relates to a preparation method of cellulose foam material. Background technique [0002] With the increasing shortage of petroleum resources and the emergence of a series of problems such as environmental pollution caused by the development of refined petrochemical products, the research and development of other alternative resources has attracted people's attention unprecedentedly. Lignocellulose has attracted the most attention as a representative of biomass resources due to its unique renewability and carbon dioxide neutrality. The main components of lignocellulose are cellulose, hemicellulose and lignin. Among them, cellulose is the most widely used, followed by hemicellulose, and lignin is the most difficult to use. Lignin is an amorphous high polymer, which is formed by linking phenylpropane through ether bonds and carbon-carbon bonds. It exists in large quantities in biomass materials and forms a three-dimensional network struc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/28C08L97/02
Inventor 李坚卢芸孙庆丰刘一星
Owner NORTHEAST FORESTRY UNIVERSITY
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