摘要
采用硅烷偶联剂(KH550)对核桃壳粉体(WSP)进行表面处理,运用熔融共混法制备聚乳酸(PLA)/WSP复合材料,研究了填料对PLA基复合材料力学性能和热稳定性的影响。结果表明,硅烷偶联剂KH550添加量为WSP质量的6%(质量分数,下同)时,PLA/WSP复合材料的拉伸、弯曲和冲击强度分别为42.09、63.89 MPa和1.69kJ/m2,比未处理的复合材料分别提高了19.1%、20.6%和19.8%;用硅烷偶联剂KH550表面处理改善了WSP与PLA间的界面相容性;WSP填料添加量为5%和40%时,复合材料的热降解活化能(Ea)比PLA分别降低了13.1、29.8kJ/mol,硅烷偶联剂KH550处理使Ea降低幅度较小。
Walnut shell powder （WSP）was treated with a silicane coupling agent KH550 and was introduced into poly（lactic acid）（PLA） forming composites through melt blending. The effect of the surface treatment of WSP was studied. When the dosage of KH550 was 6 wt% of the walnut shell, the tensile, bending, and impact strengths of PLA/WSP composites were increased by 1.2 times, reached 42.09, 63.89 MPa, and 1.69 kJ/m2, respectively. SEM images indicated the compatibility between WSP and PLA was improved after surface modification. When the contents of WSP were 5 wt% and 40 wt%, the thermal degradation activation energies（Ea） of the composites were 13.1 and 29.8 kJ/mol lower, respectively, than those of neat PLA. The surface treatment depressed the decrease in degradation activation energy.
出处
《中国塑料》
CAS
CSCD
北大核心
2014年第3期40-45,共6页
China Plastics
关键词
聚乳酸
核桃壳
表面改性
力学性能
poly（lactic acid）
walnut shell
surface modification
mechanical property
