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Weather-proof wood-plastic composite material and preparation method thereof

A wood-plastic composite material, weather-resistant technology, applied in the field of comprehensive utilization of agricultural and forestry by-products, can solve the problems of long-term anti-aging, environmental pollution, poor weather resistance, etc., and achieve enhanced absorption and scattering, strong weather resistance, and enhanced weather resistance. Effect

Inactive Publication Date: 2018-06-15
MINNAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to solve the problem of easy aging and weather resistance existing in the current application process of wood-plastic composite materials, while traditional light stabilizers also expose various defects (such as inability to resist aging for a long time, certain environmental pollution, etc.) ), providing a weather-resistant wood-plastic composite material and a preparation method thereof

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] A weather-resistant wood-plastic composite material is prepared from the following raw materials in parts by weight:

[0059] 20 parts wood flour;

[0060] 60 parts of polypropylene;

[0061] 4 parts of titanium dioxide;

[0062] 0.5 part of titanate coupling agent;

[0063] Dioctyl phthalate 2 parts;

[0064] 8 parts of ethylene-vinyl acetate copolymer;

[0065] 1 part of azodicarbonamide;

[0066] 2 parts talcum powder;

[0067] Zinc stearate 1 part.

[0068] 1) Pass the wood powder through a 100-mesh sieve, dry at 90°C for 24 hours, then add titanate coupling agent, stir and react at 80°C for 5 hours, then continue to stir and cool to room temperature to obtain modified wood powder;

[0069] 2) Preparation of H by hydrothermal synthesis 2 Ti 2 o 5 •H 2 O nanotubes: Titanium dioxide powder was added to a concentration of 5M NaOH solution (TiO 2 The dosage ratio of powder and NaOH solution is 1g:20mL), in N 2 After stirring and mixing in the atmosphere for...

Embodiment 2

[0074] A weather-resistant wood-plastic composite material is prepared from the following raw materials in parts by weight:

[0075] 30 parts of wood flour;

[0076] 100 parts of polypropylene;

[0077] 8 parts of titanium dioxide;

[0078] 2 parts of titanate coupling agent;

[0079] Dioctyl phthalate 5 parts;

[0080] 12 parts of ethylene-vinyl acetate copolymer;

[0081] 3 parts of azodicarbonamide;

[0082] 8 parts of talcum powder;

[0083] Zinc stearate 3 parts.

[0084] 1) Pass the wood powder through a 150-mesh sieve, dry at 110°C for 24 hours, then add titanate coupling agent, stir and react at 90°C for 3 hours, then continue to stir and cool to room temperature to obtain modified wood powder;

[0085] 2) Preparation of H by hydrothermal synthesis 2 Ti 2 o 5 •H 2 O nanotubes: Add titanium dioxide powder to a concentration of 10M NaOH solution (TiO 2 The dosage ratio of powder to NaOH solution is 1g:25 mL), in N 2After stirring and mixing in the atmosphere...

Embodiment 3

[0090] A weather-resistant wood-plastic composite material is prepared from the following raw materials in parts by weight:

[0091] 25 parts of wood flour;

[0092] 80 parts of polypropylene;

[0093] 6 parts of titanium dioxide;

[0094] 1.25 parts of titanate coupling agent;

[0095] 3.5 parts of dioctyl phthalate;

[0096] 10 parts of ethylene-vinyl acetate copolymer;

[0097] 2 parts of azodicarbonamide;

[0098] 5 parts of talcum powder;

[0099] Zinc stearate 2 parts.

[0100] 1) Pass the wood powder through a 120-mesh sieve, dry at 103°C for 24 hours, then add titanate coupling agent, stir and react at 85°C for 4 hours, then continue to stir and cool to room temperature to obtain modified wood powder;

[0101] 2) Preparation of H by hydrothermal synthesis 2 Ti 2 o 5 •H 2 O nanotubes: Add titanium dioxide powder to a 7.5M NaOH solution (TiO 2 The dosage ratio of powder to NaOH solution is 1g:25 mL), in N 2 After stirring and mixing in the atmosphere for 2 h...

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Abstract

The invention discloses a weather-proof wood-plastic composite material and a preparation method thereof. The weather-proof wood-plastic composite material is prepared from 20 to 30 parts of wood powder, 60 to 100 parts of polypropylene, 4 to 8 parts of titanium dioxide, 0.5 to 2 parts of a titanate coupling agent, 2 to 5 parts of dioctyl phthalate, 8 to 12 parts of an ethylene-vinyl acetate copolymer, 1 to 3 parts of azodicarbonamide, 2 to 8 parts of talcum powder and 1 to 3 parts of zinc stearate. The titanate coupling agent is adopted to modify the wood powder; the modified wood powder andthe polypropylene are used as main raw materials; the dioctyl phthalate is used as a plasticizer; the ethylene-vinyl acetate copolymer is a compatibilizer; the azodicarbonamide is used as a foaming agent; the talcum powder and the zinc stearate are used as lubricating agents; a H2Ti2O5-H2O nano tube is prepared according to a hydrothermal synthesis method, and is used as a nano light absorbent; the H2Ti2O5-H2O nano tube is uniformly dispersed in a wood-plastic composite material in a blending manner, and then the wood-plastic composite material is obtained through double-screw extrusion molding, so that the weather-proof wood-plastic composite material is excellent in flame retarding performance; the product is nontoxic and harmless, and cannot cause problems such as environmental pollution.

Description

technical field [0001] The invention belongs to the technical field of comprehensive utilization of agricultural and forestry by-products, and in particular relates to a weather-resistant wood-plastic composite material used in the field of outdoor building decoration materials and a preparation method thereof. Background technique [0002] Since the 1990s, wood-plastic composites have ushered in an era of explosive growth. In the past 20 years, the world wood-plastic composites market has developed rapidly at a double-digit annual growth rate. At the end of 2016, the global wood The demand for plastic composite materials exceeds 3 million tons, and its total value can reach about 6 billion US dollars. [0003] Wood-plastic composite material is a kind of composite material processed by mixing plastic with low-value biomass fibers such as wood flour, wood chips, chaff, crop straw, and bagasse. It combines the advantages of both plant fibers and plastics, and also overcomes ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L97/02C08L23/08C08K13/04C08K7/24C08K5/12C08K3/34C08K5/098C08J9/10
CPCC08J9/103C08J2203/04C08J2323/12C08J2497/02C08K3/34C08K5/098C08K5/12C08K7/24C08K13/04C08K2201/003C08K2201/004C08K2201/011
Inventor 费鹏陈斌白榕陆丹羽陈天衡蔡杰熊汉国
Owner MINNAN NORMAL UNIV