西南林业大学学报2017，Vol.37Issue(2)：184-191,8.DOI:10.11929/j.issn.2095-1914.2017.02.030
木纤维尺寸对聚乳酸结晶特性的影响
Effects of Wood Fibre Size on Crystallization Morphology of Poly Lactic Acid
摘要
Abstract
The effects of wood fibre (WF) size on isothermal and non-isothermal crystallization morphology and capacity of PLA in WF/PLA composites were investigated with differerntial scanning calorimetry (DSC) and polarising optical microscopy (POM).It was found that wood fibres with different size had different effects on the melting temperature,crystallinity and crystal growth rate of PLA in WF/PLA composites during isothermal crystallization process.The melting peak of PLA component shifted to higher temperature by increasing fibre size.The middle size WF (diameter =0.012-0.050 mm,length =0.3-4.0 mm) could promote heterogeneous nucleation of PLA,increased crystal growth rate and crystallinity of PLA in composites.But the large size WF (diameter=0.07-0.50 mm,length =2-10 mm) would hinder crystal growth,then reduce crystallinity.On non-isothermal crystallization phase the results show that proper WF size could increase the overall crystallinity,melting peak temperature and crystallization temperature.But the large size WF (diameter=0.07-0.50 mm,length =2-10 mm) is too big to promote crystal growth.POM shows WF as a sort of heterogeneous nucleating agent could promote nucleus forming at the WF surface and confirmed the large WF would hinder crystal growth.关键词
聚乳酸/木纤维/结晶/异相成核Key words
Poly (Lactic Acid)/wood fibre/crystallization/heterogeneous nucleation分类
农业科技引用本文复制引用
刘一楠,刘珊杉,郭文静..木纤维尺寸对聚乳酸结晶特性的影响[J].西南林业大学学报,2017,37(2):184-191,8.基金项目
黑龙江省财政自拟项目资助 （）
黑龙江省森林工业总局科技计划项目资助. （）
