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A kind of method for preparing lignocellulosic plastic

A technology of wood fiber and plastic, applied in the field of preparation of wood fiber plastic, can solve the problem of needing a large amount of solvents, etc., and achieve the effect of good mechanical strength

Active Publication Date: 2021-06-01
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a simple and environmentally friendly method for preparing lignocellulosic plastics, so as to solve the problem that a large amount of solvent is required for the esterification of wood flour in the prior art

Method used

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  • A kind of method for preparing lignocellulosic plastic
  • A kind of method for preparing lignocellulosic plastic
  • A kind of method for preparing lignocellulosic plastic

Examples

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Embodiment 1

[0036] Take the discarded branches of Hu mulberry, peel them, dry them outdoors, and crush them through a 18-mesh sieve. Add 2g of wood flour, 25g of tetrabutylammonium fluoride solution with a concentration of 0.15 (w / w) into four 500mL zirconia ball milling jars, and 70 zirconia balls with diameters of 10mm, 7mm, and 5mm. The quantity ratio is 1:2:4. Fix these 4 ball milling tanks on the planetary ball mill, set the ball milling time to 4h, rotate at 580r / min, and there is no time interval between forward and reverse rotation; the alternate interval time is 90min, and start the ball milling pretreatment. After the ball milling was finished, 4 g of succinic anhydride and 4 g of pyridine were respectively added into each ball milling tank, and the ball milling was continued for 7 hours. After the reaction, take out and combine the materials of each ball mill tank, add 250mL of ethanol to wash and then filter with suction, then wash with 250mL of deionized water and then filte...

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Abstract

The invention discloses a method for preparing lignocellulosic plastics, which comprises peeling and drying the mulberry branches, and pulverizing them with a pulverizer to obtain wood powder; stirring the wood powder and tetrabutylammonium fluoride aqueous solution evenly, pouring them into a ball mill tank, and putting Put into the grinding ball, start the planetary ball mill for ball milling; add succinic anhydride and pyridine, start the planetary ball mill for esterification reaction; add ethanol to stir, let it stand for precipitation, filter it with suction, wash it again with distilled water, and dry it in an oven; The product is melted and homogeneous, and then injection molded by an injection molding machine. Compared with anhydrous ball milling, the addition of tetrabutylammonium fluoride aqueous solution in the present invention can completely disintegrate and fibrillate the wood structure, effectively preventing the mutual clustering of particles; in the tetrabutylammonium fluoride aqueous solution, the planetary ball mill promotes woodiness. The fiber and succinic anhydride undergo an esterification reaction, avoiding the use of a large amount of organic solvents, and being environmentally friendly.

Description

technical field [0001] The invention relates to a method for preparing lignocellulosic plastics, which belongs to the field of bio-based materials. Background technique [0002] Traditional plastics have disadvantages such as difficult degradation, low recovery rate, and toxic gas generation when burned. As the total amount of non-renewable resources such as petroleum is decreasing day by day, researchers are looking for new materials to replace traditional plastics. In the agricultural and forestry industry, a large amount of lignocellulosic waste needs to be efficiently utilized. Take mulberry branches as an example, tens of thousands of tons of discarded mulberry branches are produced by feeding silkworms in Jiangsu each year, and more than 80% of them are burned or landfilled. Therefore, it is of positive significance to use wood fiber as raw material and produce degradable plastic products through an environmentally friendly process. [0003] The main components of l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08H8/00
CPCC08H8/00
Inventor 陈健强于阳张一鸣
Owner NANJING FORESTRY UNIV
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