期刊论文

Li, X.-G.

中文

功能材料

1001-9731

2013

44

11

1526-1530

10.3969/j.issn.1001-9731.2013.11.002

湖南省市校产学研合作产业化培育资助项目（11cy027） 湖南省科技重大专项资助项目（2011FJ1006） 引进国际先进林业科学技术计划资助项目（2009-4-51）

本校为第一且通讯机构

采用氢氧化钠（NaOH）＋异氰酸酯（MDI）处理的界面调控方法对竹纤维/聚乳酸复合材料界面进行调控,通过注射成型工艺制备竹纤维/聚乳酸复合材料。利用傅里叶红外光谱、X射线衍射、凝胶渗透色谱及扫描电镜等分析手段研究了竹纤维/聚乳酸复合材料的自然老化性能。研究发现,自然老化过程中,在水、光、热和氧的协同作用下,复合材料中的聚乳酸分子不断产生水解,分子链断裂,分子量减小,聚乳酸由一定的结晶态逐渐转变为无定形态,结晶度减小,聚乳酸自身强度不断下降,聚乳酸与竹纤维的粘结力不断降低,二者接合界面被破坏,复合材料质量不断减少、力学性能不断下降。老化137d后,复合材料表面出现明显的裂纹...

The interface of bamboo fiber(BF)/polylactic acid(PLA) composites was regulated by hydroxide and isocyanate, BF/PLA composites was prepared by injection molding process. Natural aging properties of BF/PLA composites was studied by the methods of Fourier transform infrared spectroscopy, X-ray diffraction, gel permeation chromatography and scanning electron microscopy. The results showed that with the synergistic effect of the water, light, heat and oxygen, the PLA molecules in the composites were continuously hydrolyzed, the molecular chains were fractured, the molecular weight was decreased, t...