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Wood flour modifier, wood flour modified thereby, and preparation method of wood flour

A modifier and wood powder technology, which is applied in the field of wood processing, can solve the problems of reducing the performance of composite materials, affecting interface compatibility, weak interface layers, etc., and achieve the effects of increasing interlayer spacing, increasing suspension stability, and reducing moisture absorption performance. Effect

Inactive Publication Date: 2013-05-22
BEIJING FORESTRY UNIVERSITY
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, as Hemmasi et al. (Journal of Reinforced Plastics and Composites 29, 964-971) showed that when montmorillonite is added to wood-plastic composites, when the montmorillonite content is too high (higher than 6%), a large amount of Adhering to the surface of wood powder and compounding with plastic will form a weak interface layer, which will affect the compatibility of the interface and reduce the performance of the composite material

Method used

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  • Wood flour modifier, wood flour modified thereby, and preparation method of wood flour
  • Wood flour modifier, wood flour modified thereby, and preparation method of wood flour
  • Wood flour modifier, wood flour modified thereby, and preparation method of wood flour

Examples

Experimental program
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Effect test

Embodiment 1

[0053] The wood flour is Populus tomentasa Carr., 10-60 mesh, Hebei Gaocheng Xingda Wood Flour Factory; Na-MMT, 200 mesh, cation exchange capacity (CEC) is 90mmol / 100g, the interlayer distance is 1.459nm, Zhejiang Fenghong Clay Chemical Co., Ltd.; didecyldimethylammonium chloride (DDAC), mass percent concentration 70%, Sanbo Biochemical Technology (Shanghai) Co., Ltd.; polyethylene glycol (PEG), molecular weight 1000, Fushun Jiahua Chemical Co., Ltd., Liaoning Province; polylactic acid (poly L-, Yisheng AI-1001 type), number average molecular weight 80000, density 1.25g / cm 3 , Melt index 10-20g / min, Shenzhen Guanghua Weiye Industrial Co., Ltd.

[0054] (1) Prepare modifier

[0055] Add sodium montmorillonite (Na-MMT), didecyldimethylammonium chloride (DDAC), polyethylene glycol (PEG-1000) with a molecular weight of 1000, and deionized water into a ball mill (Chunlong Experimental Instrument Co., Ltd. ) for ball mill dispersion treatment, in which there are 75 small balls wi...

Embodiment 2

[0061] During the experiment, except that Populus tomentasa Carr., 60-80 mesh, was used at Xingda Wood Flour Factory in Gaocheng, Hebei, the rest were the same as in Example 1.

Embodiment 3

[0063] Except that the mass percent concentration of the organic montmorillonite modifier used was 1%, the rest were the same as in Example 1 during the experiment.

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Abstract

The invention provides a wood flour modifier; the wood flour modifier is prepared from na-montmorillonite, didecyl dimethyl ammonium chloride, polyethylene glycol and de-ionized water which are mixed and then dispersed by a ball mill; and the cation exchange capacity of the na-montmorillonite and the didecyl dimethyl ammonium chloride is 1:(0.5-1). The modifier provided by the invention is simple in process, is obtained in one step and is easy to operate. The invention further provides a method for modifying wood flour by using the modifier; the modifier provided by the invention can improve wood plastic composite material interfacial compatibility, the wood flour is converted from ordinary packing into reinforcing material and becomes the wood flour especially for wood plastic composite material.

Description

technical field [0001] The invention relates to a wood powder modifier, modified wood powder and a preparation method thereof, belonging to the field of wood processing. Background technique [0002] Wood-plastic composite material (Wood-plastic composite, WPC) is composed of wood and plastic, and has excellent comprehensive performance due to the combination of the dual advantages of wood and plastic. However, there are a large number of polar functional groups on the surface of wood. During the compounding process of wood-plastic composite materials, there is a high interfacial energy difference between the hydrophilic wood material and the hydrophobic plastic material, and it is difficult for the two materials to achieve Adequate surfaces blend into each other. In addition, the hydrogen bonding between wood surfaces also makes wood fibers not uniformly dispersed in thermoplastics, which affects the performance of wood-plastic composites. Therefore, improving the compati...

Claims

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Application Information

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IPC IPC(8): B27K3/08B27K3/52C08L97/02C08L67/04C08L71/08C08K3/34C08K5/19
Inventor 曹金珍刘如王望姜卸宏
Owner BEIJING FORESTRY UNIVERSITY
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