Microwave modification method of plant fiber and application thereof

Abstract

The invention discloses a microwave modification method of plant fiber and application thereof. The method comprises the steps of: firstly smashing the plant fiber; preprocessing the smashed plant fiber with coupling agent; and processing the preprocessed plant fiber by means of microwave radiation, so that the coupling agent is grafted at the surface of the plant fiber to obtain the microwave-modified plant fiber, wherein the microwave-modified plant fiber can be used as filling material of composite material for the field of high molecular material. The modification method is environment-friendly, and has no pollution, low production cost and remarkable economic benefit; and the microwave-modified plant fiber has obvious polarity change, wherein the nonpolarity is obviously enlarged, thereby obviously improving the interface consistency with non-polarity high molecule substances and improving the combination property of the composite material.

Description

technical field [0001] The invention relates to the field of plant fibers, in particular to a microwave modification method and application of plant fibers. Background technique [0002] Plant fiber is a huge amount of renewable resources on the earth, which has the advantages of low price, low density, high elastic modulus, good biodegradability and renewability. The use of plant fibers and non-polar polymers to prepare composite materials has become a research hotspot in the field of materials, and many products have been put on the market. In foreign countries, plant fiber-filled and reinforced plastics have become a new type of green and environmentally friendly composite materials, which are widely used in the automotive industry, construction industry, transportation industry, aviation industry and other fields. However, in my country, most of the plant fibers are used for direct return to the field or mixed with fertilizers for fermentation, and the utilization rate ...

AI Technical Summary

Problems solved by technology

However, in our country, most of the plant fibers are used for direct return to the field or mixed with fertilizer for fermentation, and the utilization rate is very low.

[0003] At present, there are following deficiencies in the preparation of polymer composites from natural plant fibers: (1) natural plant fiber raw materials, due to the hydrophilicity of the hydroxyl groups in their cell wall polymers, are poorly bonded to non-polar polymer substrates , the performance of the composite material is also poor

However, the current existing technologies cannot solve the problem of interfacial compatibility well. Researching and establishing an economical and practical plant fiber surface treatment technology that can give full play to the performance of plant fibers is the focus of the research and promotion of plant fiber reinforced resin matrix composites.

(2) At present, the chemical modification methods such as alkalization and esterification pretreatment of plant fibers, polymer coating, and physical processing methods such as heat treatment, discharge treatment, and plasma treatment used at home and abroad all have complex processes and waste generation , will produce defects such as pollution to the environment; and the thermal stability of the plant fibers treated by these methods is poor, and there will be problems such as material (product) blackening and bubbles and volatiles escaping when extruded with polymers