竹纤维/MUF复合材料的老化性能研究

摘要

With mass loss rate, mechanical strength, carbonyl index and vinyl index changes as complete index, the effect of nano-SiO2 and nano-TiO2 on the ultraviolet aging properties of bamboo fiber (BF)/melamine-formaldehyde-urea (MUF) composite materials were researched by UV accelerated aging experiment. The results show that with extension of the ultraviolet aging time, BF/MUF composites have a greater degree of increase in the mass loss rate, carbonyl index and vinyl index, but bending strength and impact strength are decreased, and nano-TiO2 and nano-SiO2 have a role in delaying on ultraviolet aging of BF/MUF composites.%以质量损失率、机械强度、羰基指数及乙烯基指数的变化作为综合指标,采用紫外光加速老化试验研究纳米SiO2和纳米TiO2对竹纤维(BF)/三聚氰胺-甲醛-尿素(MUF)复合材料紫外光老化性能的影响.结果表明,随着紫外光老化时间的延长,竹纤维/MUF复合材料的质量损失事、羰基指数和乙烯基指数增加,弯曲强度和冲击强度下降；纳米SiO2和纳米TiO2对竹纤维/MUF复合材料的紫外老化有一定的延缓作用.