Environment-friendly nano antibacterial wood plastic composite and preparation method thereof

Abstract

The invention discloses an environment-friendly nano wood plastic composite, which includes the following components by weight: 1-5 parts of nano silver zinc composite, 0.01-0.05 part of a surfactant, 20-40 parts of sawdust, 4-8 parts of a coupling agent, 20-40 parts of a toughening agent and 50-80 parts of polypropylene (PP). The environment-friendly nano antibacterial wood plastic composite employs nano silver and zinc composite material to modify sawdust, in order to improve the antibacterial and antifungal properties of the wood plastic composite; and a suitable coupling agent is used for pretreating the hydroxyl and amino groups on the sawdust surface to improve the compatibility of sawdust with a non-polar matrix such as polypropylene, thereby greatly improving the mechanical properties of tensile strength, flexural strength and impact strength of the wood plastic composite. Therefore, the environment-friendly nano antibacterial wood plastic composite is green and environment-friendly, and has the advantages of good mechanical, antifungal and mildew-proof properties, no worm damage and long service life.

Description

technical field [0001] The invention relates to the field of wood-plastic materials, in particular to an environment-friendly nano antibacterial wood-plastic material and a preparation method thereof. Background technique [0002] In recent years, the world's forest resources are becoming increasingly depleted, social environmental protection awareness is increasing, and the use and waste of wood products has been concerned and restricted at home and abroad. Under this background, a kind of natural wood and synthetic plastics Wood-plastic injection molding materials came into being. [0003] In foreign countries, wood-plastic injection molding materials can be better compounded with plastics by treating the surface of wood chips, and the prepared wood-plastic materials have high mechanical properties, such as hardness, strength and sound-absorbing properties. It has been widely used in the construction industry, automobile industry, daily necessities and other industries, b...

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Problems solved by technology

Since wood chips have no static surface treatment, wood chips contain a large number of hydroxyl functional groups, showing strong chemical polarity, resulting in poor compatibility with non-polar substrates such as polypropylene, poor dimensional stability, and resulting in mechanical properties of materials. Secondly, traditional wood-plastic materials are easy to breed bacteria and become the source of infectious diseases. Therefore, how to improve the compatibility and antibacterial and anti-mildew properties of wood components in wood-plastic injection molding materials has become a research topic for wood-plastic injection molding materials. one of the keys

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