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Self-assembled flame-retardant bamboo-plastic composite material and preparation method thereof

A composite material and self-assembly technology, applied in the field of comprehensive utilization of agricultural and forestry by-products, can solve problems such as easy combustion, prevent mass transfer and heat transfer, improve flame retardant performance, and reduce heat release.

Inactive Publication Date: 2018-06-22
MINNAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a self-assembled flame-retardant bamboo-plastic composite material and its preparation method in view of the flammable problems existing in the current application process of bamboo-plastic composite materials and the defects exposed by traditional flame retardants.

Method used

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preparation example Construction

[0032] A method for preparing a self-assembled flame-retardant bamboo-plastic composite material, comprising the following steps:

[0033] 1) Pass 20-30 parts of bamboo powder through a 100-150 mesh sieve, dry at 90-110°C for 18-24h, then add silane coupling agent with 2-4% of the weight of bamboo powder, and stir at 80-90°C for reaction 3 -5h, then continue to stir and cool to room temperature to obtain modified bamboo powder;

[0034] 2) Combine the modified bamboo powder obtained in step 1), 60-100 parts of high-density polyethylene, 1-3 parts of azodicarbonamide, 8-12 parts of ethylene-vinyl acetate copolymer, 2-8 parts of polyethylene After mixing wax and 1-3 parts of zinc stearate, stir at 100-120°C for 10-20 minutes to obtain a mixed material;

[0035] 3) Extrude the above mixture in a twin-screw extruder, and the heating temperature T1-T10 of each section is 120°C, 130°C, 140°C, 150°C, 160°C, 170°C, 170°C, 160°C , 140°C and 120°C, the speed of the main engine is 10-1...

Embodiment 1

[0041] A method for preparing a self-assembled flame-retardant bamboo-plastic composite material, comprising the following steps:

[0042] 1) Pass 25 parts of bamboo powder through a 120-mesh sieve, dry at 103°C for 24 hours, then add silane coupling agent of 3% by weight of bamboo powder, stir and react at 85°C for 4 hours, then continue to stir and cool to room temperature to obtain modified bamboo pink;

[0043] 2) The modified bamboo powder obtained in step 1), 80 parts of high-density polyethylene, 2 parts of azodicarbonamide, 10 parts of ethylene-vinyl acetate copolymer, 5 parts of polyethylene wax and 2 parts of zinc stearate After mixing, stir at 110°C for 15 minutes to obtain a mixed material;

[0044] 3) Extrude the above mixture in a twin-screw extruder, and the heating temperature T1-T10 of each section is 120°C, 130°C, 140°C, 150°C, 160°C, 170°C, 170°C, 160°C , 140°C and 120°C, the speed of the main engine is 15 rpm, the material pressure is 1.5MPA, and then the...

Embodiment 2

[0050] A method for preparing a self-assembled flame-retardant bamboo-plastic composite material, comprising the following steps:

[0051] 1) Pass 20 parts of bamboo powder through a 100-mesh sieve, dry at 90°C for 24 hours, then add a silane coupling agent of 2% by weight of the bamboo powder, stir and react at 80°C for 5 hours, then continue stirring and cooling to room temperature to obtain modified bamboo pink;

[0052] 2) Mix the modified bamboo powder obtained in step 1), 60 parts of high-density polyethylene, 1 part of azodicarbonamide, 8 parts of ethylene-vinyl acetate copolymer, 2 parts of polyethylene wax and 1 part of zinc stearate After mixing, stir at 100°C for 20 minutes to obtain a mixed material;

[0053] 3) Extrude the above mixture in a twin-screw extruder, and the heating temperature T1-T10 of each section is 120°C, 130°C, 140°C, 150°C, 160°C, 170°C, 170°C, 160°C , 140°C and 120°C, the speed of the main engine is 10 rpm, the material pressure is 1.5MPA, an...

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Abstract

The invention discloses a self-assembled flame-retardant bamboo-plastic composite material and a preparation method thereof. According to the preparation method, bamboo powder and high density polyethylene are taken as main raw materials, a silane coupling agent is used as a coupling agent, an ethylene-vinyl acetate copolymer is taken as a compatibilizer, azodicarbonamide is taken as a foaming agent, polyethylene wax and zinc stearate are used as lubricating agents, and the bamboo-plastic composite material is prepared by carrying out twin-screw extrusion on-time molding. The preparation method comprises the steps of preparing H2Ti2O5-H2O nanotubes by using a hydrothermal synthesis method, and modifying the nanotubes by using gamma-aminopropyl triethoxy silane so as to prepare nanotube / gamma-aminopropyl triethoxy silane dispersion liquid; then, soaking the treated bamboo-plastic composite material in the nanotube / gamma-aminopropyl triethoxy silane dispersion liquid and a sodium polystyrenesulfonate solution alternately for a plurality of times so as to obtain the self-assembled type flame-retardant bamboo-plastic composite material. According to the product prepared by the method,the H2Ti2O5-H2O nanotubes are attached on the surface of the composite material in a form of a nano-film, and a very good flame-retardant effect can be achieved by using a lower content of a nano fireretardant, so that the product cost reduction is facilitated.

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 self-assembled flame-retardant bamboo-plastic composite material applied in the field of building decoration materials and a preparation method thereof. Background technique [0002] While my country's forestry resources are scarce, my country is also the country with the richest and most widely distributed bamboo species in the world, known as the "Kingdom of Bamboo". According to statistics, there are more than 70 genera and more than 1,000 species of bamboo in the world, while there are 37 genera and more than 500 species known in my country. Bamboo is distributed in most provinces, municipalities and autonomous regions in my country, mainly concentrated in the southern provinces, the Yellow River and the Yangtze River Basin, mainly scattered bamboo, the area from the Yangtze River to Nanling is a mixed b...

Claims

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Application Information

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IPC IPC(8): C08J9/40C08J9/42C08J9/10C08L23/06C08L97/02C08L23/08C08K5/098
CPCC08J9/103C08J9/40C08J9/42C08J2203/04C08J2323/06C08J2423/08C08J2497/02C08K5/098
Inventor 费鹏白榕陈斌刘玉娟刘琪李璐陈晨昕
Owner MINNAN NORMAL UNIV
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