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Polypropylene/polyethylene/wood fiber composite and preparation method thereof

A composite material and wood fiber technology, which is applied in the field of low-cost toughened polypropylene composite material and its preparation, can solve the problems of high cost, unfavorable popularization and use of polypropylene, complicated process, etc., and achieves improved environmental protection performance and reduced preparation cost. , the effect of rich resources

Inactive Publication Date: 2016-04-06
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the cost of existing modification methods is high and the process is complicated, which is not conducive to the popularization and use of polypropylene.

Method used

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  • Polypropylene/polyethylene/wood fiber composite and preparation method thereof
  • Polypropylene/polyethylene/wood fiber composite and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The preparation method of the multi-component composite modified polypropylene composite material:

[0025] (1) The composition of raw materials for preparing composite materials is as follows, by mass fraction: 40% polypropylene, 28% polyethylene, 20% wood fiber, 1.5% lubricant, 0.5% antioxidant, 10% compatibilizer, wherein, wood The fibers are treated with a silane coupling agent.

[0026] The polypropylene used therein is a copolymerized polypropylene (ethylene propylene copolymer).

[0027] The polyethylene used therein is low density polyethylene (LDPE).

[0028] The process of using a silane coupling agent to process wood fiber is as follows: the untreated wood fiber with a particle size of 120 meshes was baked at 100°C for 3 hours, then placed in a high-speed mixer, and the temperature in the high-speed mixer was maintained at 100-120°C, prepare the silane coupling agent KH-550 into a solution (by mass fraction: silane coupling agent 20%, ethanol 60%, deionized...

Embodiment 2

[0036] The preparation method of the multi-component composite modified polypropylene composite material:

[0037] (1) The composition of raw materials for preparing composite materials is as follows, by mass fraction: 45% polypropylene, 30% polyethylene, 15% wood fiber, 1% lubricant, 0.5% antioxidant, 8.5% compatibilizer, wherein, wood The fibers are treated with a silane coupling agent.

[0038] The polypropylene used therein is isotactic polypropylene.

[0039] The polyethylene used therein is linear low density polyethylene (LLDPE).

[0040] The process of using silane coupling agent to process wood fiber is as follows: the untreated wood fiber with a particle size of 150 meshes was baked at 100°C for 3 hours, then placed in a high-speed mixer, and the temperature in the high-speed mixer was maintained at 100~120℃, prepare the silane coupling agent KH-560 into a solution (by mass fraction: silane coupling agent 20%, ethanol 60%, deionized water 20%), and use a sprayer to...

Embodiment 3

[0048] The preparation method of the multi-component composite modified polypropylene composite material:

[0049] (1) The composition of raw materials for preparing composite materials is as follows, by mass fraction: 34% polypropylene, 34% polyethylene, 23% wood fiber, 1% lubricant, 1% antioxidant, 7% compatibilizer, wherein, wood The fibers are treated with a titanate coupling agent.

[0050] The polypropylene used therein is atactic polypropylene.

[0051] The polyethylene used therein is high density polyethylene (HDPE).

[0052] The process of using titanate coupling agent to treat wood fiber is as follows: bake untreated wood fiber with a particle size of 100 mesh at 100°C for 3 hours, then place it in a high-speed mixer, and keep it in the high-speed mixer. The temperature is 100 ~ 120 ℃, the titanate coupling agent TC-POT is prepared into a solution (by mass fraction: titanate coupling agent 20%, ethanol 60%, deionized water 20%), and use The sprayer sprays the sol...

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Abstract

The invention provides polypropylene / polyethylene / wood fiber composite and a preparation method thereof. The composite comprises 30%-70% of polypropylene, 10%-50% of polyethylene, 10%-25% of wood fiber, 0.1%-2% of a lubricant, 0.1%-1% of an antioxidant and 3%-10% of a compatibilizer. Polypropylene, polyethylene and wood fiber as well as the lubricant, the antioxidant and the compatibilizer are added to a blender mixer separately, stirred and mixed, and a mixed material is obtained; the mixed materials are further mixed uniformly and pelletized by a double-screw extruder, and the pelletized mixed materials are dried. On one hand, the polypropylene, polyethylene and wood fiber composite prepared with the method overcomes defects of poor rigidity and notch sensitivity of polypropylene; on the other hand, the cost of the composite is substantially reduced due to use of the resourceful and recyclable wood fiber with low price, and the environment protection performance is also improved.

Description

technical field [0001] The invention belongs to the field of composite material preparation, and in particular relates to a low-cost toughened polypropylene composite material and a preparation method thereof. Background technique [0002] Polypropylene is a semi-crystalline thermoplastic whose output is second only to polyethylene in plastics. Polypropylene has the advantages of abundant sources, low price, excellent mechanical properties, good electrical insulation and resistance to stress cracking, and has good chemical stability. Therefore, polypropylene is widely used in injection molding, film, monofilament, fiber, hollow molding, extrusion molding and other products. [0003] Polypropylene has strong crystallization ability, and some mechanical properties of polypropylene are comparable to engineering plastics. However, due to the large size and uneven distribution of spherulites formed by polypropylene, polypropylene has a large molding shrinkage rate and poor impa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/14C08L23/06C08L97/02C08K5/098C08K5/20B29C47/92B29C48/92
CPCC08L23/12B29C48/92B29C2948/92704C08L23/14C08L2205/025C08L2205/035C08L2205/06C08L2205/08C08L2205/16C08L2207/062C08L2207/066C08L23/06C08L97/02C08L51/06C08K5/098C08K5/20
Inventor 王景平任庆海
Owner SHAANXI UNIV OF SCI & TECH
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