Research on preparation of rapeseed straw wood-plastic composites
To address the rapeseed straw processing,wood-plastic composites were prepared by mixing and hot-pressing process using rapeseed straw as raw material.Effects of filling amount,particle size and polymer types of rapeseed straw on performance indexes of wood-plastic composites were systematically studied,and were com-pared with relevant indexes in GB/T 24137-2009.Results showed that properties of wood-plastic composites were better,when filling amount of rapeseed straw was 30%and the particle size was 80 mesh.Performance of compos-ites prepared by polypropylene was better than that of ethylene-acrylic acid copolymer,high density polyethylene and polyvinyl chloride.The effects of rice husk ash,hydrophilic nano-silica and hydrophobic nano-silica on perfor-mance indexes of materials were compared.It indicated that adding 5%oleophilic nano-silica or 5%rice husk ash could effectively enhance the performance of composites,with tensile strength increased by 2.01%and 11.25%,bending strength increased by 12.73%and 7.32%,and elastic modulus increased by 7.13%and 6.43%,respective-ly.The wood-plastic composites prepared with a formula of 25%rapeseed straw powder,5%rice husk ash and 70%polypropylene had the best performance as tensile strength 17.83±0.56 MPa,bending strength 33.68±0.04 MPa,elastic modulus 2119.32±6.39 MPa,shore hardness 72.30±1.09 HD,water content 0.39±0.02%,and water absorp-tion thickness expansion rate 0.58±0.00%.These performances were basically met the national standards.
国家科技期刊平台
NSTL
万方数据
