Pretreatment method of wood flour suitable for plastic filling

A treatment method and pretreatment technology, which is applied in the field of wood powder pretreatment, can solve the problems of unfavorable environmental protection, waste liquid pollution, etc., and achieve the effect of improving crystallinity and good mechanical properties

Inactive Publication Date: 2011-10-26
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The pretreatment of wood powder does not use expensive coupling agents or compatibilizers in production, but from the perspective of material properties, the effect of wood powder pretreatment is not as go

Method used

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  • Pretreatment method of wood flour suitable for plastic filling
  • Pretreatment method of wood flour suitable for plastic filling

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0019] Example 1

[0020] Using 80 mesh poplar wood powder, provided by Zhejiang Lin’an Mingzhu Bamboo Wood Powder Co., Ltd.; PP, provided by Sinopec Shanghai Chemical Co., Ltd., grade T300, MFI=3g / 10min (2.16KG / 230℃), the PP stretch Strength is 31MPa, bending strength is 31MPa, impact strength is 9KJ / m 2 . Directly use an electric kettle to boil the wood flour, add wood flour and water according to the mass ratio of wood flour to water 1:8, stir until the wood flour sinks to the bottom of the pot and start heating. After the water boils, boil for 10 minutes, stop heating and filter while hot, and treat the wood flour filter cake in a vacuum oven for 12 hours, and the vacuum degree of the oven is 0.09-0.1MPa. After the treatment, open the oven door to dry the wood flour to a constant weight, and then sieving through 80 meshes for treatment.

[0021] The treated wood powder 30phr and PP 70phr and processing aids were added to the HAAKE rheometer to melt and blend for 15 minutes, t...

Example Embodiment

[0022] Example 2

[0023] Use 80 mesh poplar wood powder, provided by Zhejiang Lin’an Mingzhu Bamboo Wood Powder Co., Ltd.; PP, provided by Sinopec Shanghai Chemical Co., Ltd., grade T300; PP-g-mah, provided by Nanjing Deba Chemical Co., Ltd., grafting rate approximately 1%. Use an electric kettle to boil the wood flour, add wood flour and water according to the mass ratio of wood flour to water 1:10, stir until the wood flour sinks to the bottom of the pot and start heating. After the water boils, boil for 10 minutes, stop heating and filter while it is hot, and use a vacuum oven for sauna treatment for 12 hours on the wood flour filter cake. The vacuum degree of the oven is 0.09-0.1MPa. After the treatment, open the oven door to dry the wood flour to a constant weight, and then sieving through 80 meshes for treatment.

[0024] Add 30phr of wood powder and 70phr of PP and 5phr of PP-g-mah to the HAAKE rheometer for 15 min, 60 rpm, and blending temperature of 180°C. The composite...

Example Embodiment

[0025] Example 3

[0026] Use 80 mesh poplar wood powder, provided by Zhejiang Lin’an Mingzhu Bamboo Wood Powder Co., Ltd.; PP, provided by Sinopec Shanghai Chemical Co., Ltd., grade T300; PP-g-mah, provided by Nanjing Deba Chemical Co., Ltd., grafting rate approximately 1%. Use an electric kettle to boil the wood flour, add wood flour and water according to the mass ratio of wood flour to water 1:10, boil for 15 minutes after the water is boiling, stop heating and filter while it is hot, and use the wood flour filter cake in a vacuum oven for sauna After processing for 12 hours, the vacuum degree of the oven is 0.09-0.1MPa. After the treatment, open the oven door to dry the wood flour to a constant weight, and then sieving through 80 meshes for treatment.

[0027] The treated wood powder 60phr, PP 40phr and 5phr PP-g-mah were added to the HAAKE rheometer and melted and blended for 15 min, at a speed of 60 rpm, and a blending temperature of 180°C; a 25-ton flat vulcanizer was use...

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Abstract

The present invention discloses a high-temperature treatment method of wood flour, which is characterized by adding wood flour and water at a weight ratio of (1:5)-(1:20) into a container, boiling, placing the boiled wood flour in a vacuum oven, carrying out vacuum high-temperature treatment at the temperature of 100-110 DEG C for 6-50 hours and drying at the temperature of 100-110 DEG C to constant weight to obtain treated wood flour. The PP (polypropylene)-based wood-plastic composite material prepared from the wood flour treated by the high-temperature treatment method has mechanical properties equivalent to the PP-based wood-plastic composite material containing a compatibilizer PP-g-mah (polypropylene-graft-maleic anhydride), and the simultaneous use of the wood flour and PP-g-mah greatly improves the mechanical properties of the PP-based wood-plastic composite material. The high-temperature treatment method has the advantages of simple used utensil, simple operation process, excellent performance of the prepared materials, no pollutant generation during the production process and reusable boiled wastewater and is an environmentally-friendly high-efficiency wood flour treatment mode.

Description

Technical field: [0001] The invention relates to a wood powder pretreatment method, in particular to a wood powder pretreatment method used in the production of wood powder-filled polypropylene (PP) plastic polymer composite materials. Background technique: [0002] Nowadays, the plastic industry is developing rapidly and is widely used in various fields. In order to meet different requirements, various plastic alloys, polymer composite materials filled with rigid particles such as inorganic particles and fibers have come out one after another, and wood powder, Plant fibers such as straw and rice husks are filled with thermoplastic resins, and wood-plastic composites (WPC), which are processed by extrusion, injection molding and other plastic molding methods, have also become a research topic due to their excellent performance and convenient processing methods. one of the hotspots. Wood-plastic composite material combines the characteristics of wood and plastic materials. I...

Claims

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Application Information

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IPC IPC(8): C08J3/00C08L23/12C08L97/02
Inventor 郭卫红杨俊王纪斌汪济奎张桂新陈程王伟
Owner EAST CHINA UNIV OF SCI & TECH
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