Long plant fiber-reinforced polypropylene composite material and preparation method thereof

Abstract

The invention discloses a long plant fiber-reinforced polypropylene composite material. The long plant fiber-reinforced polypropylene composite material is prepared from the following raw materials inparts by weight: 25-65 parts of polypropylene, 30-70 parts of long plant fiber, 0.5-15 parts of epoxy plant oil, 0.1-5 parts of a lubricant and 0.1-2 parts of an antioxidant, wherein the average length of the long plant fiber is 100-1000mm. The invention further discloses a preparation method of the long plant fiber-reinforced polypropylene composite material. The preparation method comprises thefollowing steps: performing melt blending on the components through one piece of high-speed blending system equipment, tableting, cooling, crushing by using a crushing machine, and granulating to obtain the long plant fiber-reinforced polypropylene composite material with high strength, high modulus, low cost, good toughness and light weight. The long plant fiber-reinforced polypropylene composite material prepared by the preparation method provided by the invention can be used as an imitation wood material for replacing the conventional wood or plywood, and can be widely applied to many fields of furniture boards, transporting trays, building frameworks, outdoor floor boards, guardrail columns, leisure benches, gardening flowerpots and the like.

Description

technical field [0001] The invention belongs to the technical field of polymer material modification and the field of comprehensive utilization of plant fibers, and specifically relates to a long fiber reinforced polypropylene composite material and a preparation method thereof. Background technique [0002] Plant fibers such as coconut shell fiber, kenaf, jute, etc. have many advantages such as light weight, high specific strength, and low price; at the same time, they all come from renewable resources and are not harmful to the environment. They are comparable to glass fiber reinforced composite materials. Composite materials reinforced with plant fibers are not only environmentally friendly, but also have low cost, low density, and anti-ultraviolet function; plant fibers can completely replace glass fibers for reinforced plastics. [0003] Plant fiber-reinforced plastic waste can be disposed of by incineration instead of landfill like glass fiber-reinforced plastic; there...

AI Technical Summary

Problems solved by technology

Therefore, it is difficult to use vegetable oil as a compatibilizer between plant fibers and polypropylene to achieve a good compatibilization effect, which eventually leads to poor mechanical properties of the obtained composites.

[0006] The plant fiber reinforced polypropylene composite material reported in existing patents (CN102585358A, CN103788488A, CN102382374A, CN102295806A) often uses chopped plant fiber (plant fiber average length≤50mm) to fill polypropylene resin, and the plant fiber in the obtained composite material The residual length is short, which cannot fully reflect the reinforcing effect of the fibrous material on the resin, and cannot obtain a composite material with excellent performance

In addition, the preparation methods of plant fiber reinforced polypropylene composite materials reported in existing patents often require separate drying of plant fibers, which not only greatly reduces the production efficiency of composite materials, but also consumes a lot of manpower and energy.

Images