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Bamboo and plastic composite material and preparation method thereof

A composite material and bamboo-plastic technology, applied in the field of fiber material composition and its preparation, can solve the problems of poor compatibility and weak strength of bamboo-plastic composite materials, achieve low water absorption, improve compatibility, and protect the environment. Effect

Inactive Publication Date: 2013-07-10
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] However, in the preparation process of the above-mentioned bamboo-plastic composite materials, only a compatibilizer is used to directly mix wood powder and plastics, because wood powder is a polar polymer compound with a large number of polar groups on the surface, while plastics are A non-polar high molecular polymer, the compatibility between the two is poor, and the strength of the prepared bamboo-plastic composite material is weak

Method used

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  • Bamboo and plastic composite material and preparation method thereof
  • Bamboo and plastic composite material and preparation method thereof
  • Bamboo and plastic composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] 1. Prepare materials according to the following proportions by weight:

[0062]

[0063]

[0064] Among them, the molecular weight of high-density polyethylene (HDPE) is 40,000-300,000, and the density is 0.93-0.97g / cm 3 , the melt index (MI, g / 10min) is 0.3-0.5; the molecular weight of maleic anhydride grafted polyethylene is 10000-300000, the grafting rate is 1-2%, and the melt index is 0.5-0.6g / 10min; the polyethylene wax The molecular weight is 2500-3000, the density is 0.92-0.94g / cm 3 , viscosity 0.7-1.2Pa·s (140°C); nitrogen content of ammonium polyphosphate is 22%-25%, phosphorus content ≥ 20%.

[0065] Wherein, the modified bamboo fiber is prepared according to the steps carried out in the following order:

[0066] A) Cut the bamboo into lengths of 20-40 mm, place it in a blaster (Beijing Forestry University; model: BL-08), open the pressure valve of the blaster, and inject saturated water vapor with a relative pressure of 3.0 MPa to blast. The relative...

Embodiment 2

[0080] 1. Prepare materials according to the following proportions by weight:

[0081]

[0082] Wherein, the molecular weight of the polypropylene (PP) plastic is 10000-300000, the melt index (MI, g / 10min) is 0.2-1; the molecular weight of the maleic anhydride grafted polypropylene is 12000-300000, and the grafting ratio 1.5-2.5%, melt index 0.3-1.2g / 10min.

[0083] Wherein, the modified bamboo fiber is prepared according to the steps carried out in the following order:

[0084] A) Cut the bamboo into 20-40mm long bamboo material sections, place them in the blaster, open the blaster pressure valve, and feed saturated steam with a relative pressure of 3.0MPa to make the relative pressure in the blaster reach 4MPa. Keep it for 15 minutes, and steam the bamboo;

[0085] B) open the discharge valve of the blaster, make the bamboo raw material explode and spray into the normal pressure receiving container in an instant, and obtain the blasting bamboo fiber;

[0086] C) The ex...

Embodiment 3

[0092] 1. Prepare materials according to the following proportions by weight:

[0093]

[0094] Among them, the molecular weight of high-density polyethylene (HDPE) is 40,000-300,000, and the density is 0.94g / cm 3 , the melt index (MI, g / 10min) is 0.3-0.5; the molecular weight of maleic anhydride grafted polyethylene is 10000-300000, the grafting rate is 1-2%, and the melt index is 0.5-0.6g / 10min; The molecular weight is 800-1300, and the chlorine content is 40-70%.

[0095] Wherein, the modified bamboo fiber is prepared according to the steps carried out in the following order:

[0096] A) Cut the bamboo material into 20-40mm long bamboo material sections, place it in the blaster, open the blaster pressure valve, and feed saturated water vapor with a relative pressure of 3.0MPa to make the relative pressure in the blaster reach 2.5MPa. Keep it for 30 minutes, and steam the bamboo;

[0097]B) open the discharge valve of the blaster, make the bamboo raw material explode a...

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Abstract

The invention discloses a bamboo and plastic composite material and a preparation method thereof. The bamboo and plastic composite material comprises the following raw materials according to parts by weight: 40-80 parts of modified bamboo fiber, 15-85 parts of plastic, 2-10 parts of compatilizer, 2-10 parts of lubricant, 0.2-1.0 part of antioxidant, 5-15 parts of filler and 2-10 parts of fire retardant. Bamboo raw materials are prepared into modified bamboo fibers with an explosion treatment method, wherein the modified bamboo fibers are mutually separated, and eh surface of the modified bamboo fibers is covered with lignin; then the modified bamboo fiber is compounded with plastic; and the product is extruded to form finished product material. According to the bamboo and plastic composite, the technical problems of poor compatibility of wood fiber and thermoplastic plastics can be solved to realize the purpose of comprehensively utilizing the bamboo fiber and plastic, the wood can beomitted, and the additional value of the forest residue is increased. The bamboo and plastic composite material manufactured with the preparation method has the advantages of high mechanical property, and strong tensile strength, bending strength and impact strength of composite material, and the industrial production of high-performance products, such as building engineering materials can be realized.

Description

technical field [0001] The invention relates to a fiber material composition and a preparation method thereof, in particular to a wood-plastic material containing bamboo fiber material and a preparation method thereof. Background technique [0002] my country is a country with poor forest resources. Especially when my country's economy enters the stage of rapid development, the demand for wood is increasing day by day. The overuse of forest resources, the sharp decrease of the total forest area and the implementation of natural forest protection projects have intensified the contradiction between wood supply and demand. However, bamboo has a wide planting area in southern my country, and bamboo has the advantages of fast growth, early maturity, high strength, good toughness, and high hardness. It is an ideal raw material for engineering structural materials. It can replace wood in many fields and is widely used in many fields. Applications. [0003] The chemical composition ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L97/02C08L23/12C08L23/06C08L51/06C08L23/28C08K13/02C08K3/26C08K3/32D21B1/36
Inventor 樊永明李建章吴玉英张学铭
Owner BEIJING FORESTRY UNIVERSITY
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