Mechanical and thermal properties of poly(lactic acid) composites with rice straw fiber modified by poly(butyl acrylate)
Mechanical and thermal properties of poly(lactic acid) composites with rice straw fiber modified by poly(butyl acrylate)
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DOI：
10.1016/j.cej.2010.11.039
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发表时间：
2011-01-15
影响因子：
15.1
通讯作者：
Fu, Xie
中科院分区：
文献类型：
--
作者：
Qin, Lijun;Qiu, Jianhui;Fu, Xie
采用丙烯酸丁酯（BA）单体悬浮聚合对稻草纤维（RSF）进行改性。傅里叶变换红外（FTIR）光谱和扫描电子显微镜（SEM）结果表明聚丙烯酸丁酯（PBA）被吸附并涂覆在RSF上。采用HAAKE流变仪以改性稻草纤维（MRSF）和聚乳酸（PLA）制备了可生物降解复合材料。力学性能表明，PLA/MRSF复合材料的拉伸强度(W(%) = 7.98)较空白样品提高了6 MPa。 PLA/MRSF复合材料的吸水率低于PLA/RSF复合材料。通过热重分析（TGA）和差示扫描量热法（DSC）研究了这些复合材料的热性能。 TGA 结果证实，PLA/RSF 复合材料的热稳定性随着 PBA 的增加而增加。 DSC数据表明RSF起到了成核剂的作用，而PHA使PLA的结晶更加困难和不完全。 (C) 2010 Elsevier B.V. 保留所有权利。
The rice straw fiber (RSF) was modified by suspension polymerization of butyl acrylate (BA) monomer. The results of Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM) indicated that poly(butyl acrylate) (PBA) was adsorbed and coated on RSF. The biodegradable composites were prepared with the modified rice straw fiber (MRSF) and poly(lactic acid) (PLA) by HAAKE rheometer. Mechanical properties showed that the tensile strength of PLA/MRSF composites (W(%) = 7.98) increased by 6 MPa compared with blank sample. The water absorption of the PLA/MRSF composites was lower than PLA/RSF composites. The thermal properties of these composites were investigated by thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). The TGA results confirmed that thermal stability of PLA/RSF composites increased with the PBA increasing. The DSC data showed that RSF played a role as a nucleating agent and PHA made crystallization of PLA more difficult and incomplete. (C) 2010 Elsevier B.V. All rights reserved.