Method for preparing waste wool/polylactic acid ecological composite material

Abstract

The invention relates to a method for preparing a waste wool / polylactic acid ecological composite material. The method comprises the following steps of: layering waste wool with high heat insulating performance, serving as a reinforcement, and polylactic acid serving as a substrate in a mixed mode according to a sandwich structure, wherein both upper surface and lower surface are polylactic acid, and the percentage ratio by weight of the wool to the polylactic acid is (60-80):(20-40); hot-pressing the layered waste wool / polylactic acid on a hot press at the temperature of between 170 DEG C and 180 DEG C and under the pressure of between 4MPa and 10MPa for 2 to 8 minutes; and cooling to obtain the composite material. Both the waste wool and the polylactic acid can be in different forms such as fiber, wool tops, yarns, fabrics and the like. The composite material has the advantages of complete biological degradation, high heat insulation performance, high sound insulation performance, insect prevention, moth prevention and moisture protection, and can be applied to various fields of buildings, interior decoration, automobile interior parts and the like with high requirements for fire retardation, heat insulation and sound insulation. By adopting the method, a large amount of waste wool can be recycled, and environment problem caused by white pollution can be solved.

Description

technical field [0001] The invention relates to a completely biodegradable waste wool / polylactic acid composite material and a preparation method thereof, belonging to the technical field of polymer materials. Background technique [0002] With the increase of population and the improvement of people's living standards, the demand for fiber is getting higher and higher. China is the production base of global textiles and the core of the fiber industry. The textile industry is the traditional pillar industry of China's national economy and an important livelihood industry. The overall textile production capacity is close to half of the world's. At present, my country's textile consumption needs have shifted from survival consumption to enjoyment consumption, gradually changing from a textile production base to a consumer subject. The increase in textile consumption has brought new issues: on the one hand, the available arable land for the production of natural fibers is cons...

AI Technical Summary

Problems solved by technology

Therefore, at present, biodegradable polylactic acid thermoplastic composites are mainly concentrated on natural cellulose fibers as reinforcement materials, and no composite materials using wool as reinforcement materials have been reported.