Sisal fiber reinforced polypropylene composite and preparation method thereof

Abstract

The invention discloses a sisal fiber reinforced polypropylene composite and a preparation method thereof. The composite is prepared from polypropylene, polyvinyl chloride, sisal fiber, nano cellulose, epoxy resin E51, epoxy chloropropane, gamma-amino-propyl trimethoxy silane, vinyl triethoxy silane, stearamide, polyethylene glycol, ethyl acetate, isopropanol, acetone and a sodium hydroxide solution. The sisal fiber is soaked with the sodium hydroxide solution after being cut into strips and washed with distilled water after the pH is adjusted to be neutral, other raw materials are added for modification treatment, the obtained material is added to a mold for hot pressing forming, and cooling and demolding are performed. The composite has good tensile property, has the tensile strength up to 33.8 MPa, has the impact strength up to 20.6 KJ / m<2> at most and has good impact resistance.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to a sisal fiber reinforced polypropylene composite material for environmental protection and a preparation method thereof. Background technique [0002] In recent years, due to the increasingly prominent global energy and environmental problems, natural plant fibers rich in nature, such as wood fiber, bamboo fiber, flax, sisal hemp, hemp, coconut fiber, etc., have been used to replace synthetic fibers as resin-based composite materials. Reinforcement bodies have gradually attracted people's attention. Compared with synthetic fibers, natural fibers have excellent characteristics such as low cost, light weight, high specific strength and specific modulus. Using natural plant fibers abundant in nature to replace traditional man-made fibers and other reinforced polymer-based composite materials can prepare environmentally friendly and sustainable materials. Recycled composite materi...

AI Technical Summary

Problems solved by technology

Physical methods mainly include heat treatment (treating fibers to become hard and brittle, which affects the mechanical properties of composite materials); electrostatic discharge treatment (requires special equipment, high cost, and has not yet achieved industrial production); infiltration / coating (it is difficult to find compatibility better monomers); chemical methods mainly include alkali treatment (can remove non-cellulose components, but can not improve the compatibility and interfacial bonding performance of fibers and polymers); graft copolymerization (monomers in the initiator Under the action, it is induced to generate free radicals, grafts and copolymerizes with the matrix or fiber surface, and introduces molecular chains with better compatibility with the matrix, which can improve the interface conditions, but the process is complicated and may cause a decrease in fiber strength); organosilane Coupling agent treatment (to a certain extent, reduce the surface energy of the fiber and improve the compatibility between the fiber and the polymer, but the interface coupling agent itself contains certain hydrophilic groups such as carboxyl and hydroxyl groups. If the reaction is not complete, the fiber surface still have high surface energy and hydrophilicity)