Effects of Modifier Type on Properties of in Situ Organo-Montmorillonite Modified Wood Flour/Poly(lactic acid) Composites.
Effects of Modifier Type on Properties of in Situ Organo-Montmorillonite Modified Wood Flour/Poly(lactic acid) Composites.
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DOI：
10.1021/acsami.5b07989
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发表时间：
2016-01
影响因子：
9.5
通讯作者：
Ru Liu;Yu Chen;Jinzhen Cao
中科院分区：
文献类型：
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作者：
Ru Liu;Yu Chen;Jinzhen Cao
采用钠基蒙脱土(Na-MMT)和双十二烷基二甲基氯化铵(DDAC)和十二烷基磺酸钠(SDS)两种表面活性剂对木粉进行两步改性。对改性后的WFS进行了表征，研究了蒙脱土类型对其与聚乳酸(PLA)复合材料物理、力学和热性能的影响。结果表明：(1)DDAC和十二烷基硫酸钠均能将Na-MMT改性为有机蒙脱土，并均匀分布在WF胞壁中；(2)除冲击强度外，有机蒙脱土均能改善复合材料的物理性能、大部分力学性能和热性能；(3)与十二烷基硫酸钠相比，DDAC对复合材料的性能影响更大。但DDAC对复合材料的早期热分解有一定的负面影响。
Wood flour (WF) was modified with sodium-montmorillonite (Na-MMT) and two types of surfactant modifiers, namely, didecyl dimethylammonium chloride (DDAC) and sodium dodecyl sulfonate (SDS) though a two-step process inside WF. The thus-modified WFs were characterized, and the effects of MMT type on physical, mechanical, and thermal properties of their composites with poly(lactic acid) (PLA) were investigated. The results showed: (1) either DDAC or SDS could modified Na-MMT into OMMT, and then uniformly distributed in WF cell walls; (2) OMMT improved the physical properties, most mechanical properties, and thermal properties of the composites except for the impact strength; and (3) compared with SDS, DDAC seemed to perform better in properties of composites. However, DDAC showed some negative effect on the early stage of composite thermal decomposition.