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首页> 外文期刊>Journal of Applied Polymer Science >Surface Modification of Halloysite Nanotubes with L-lactic Acid: An Effective Route to High-Performance Poly(L-lactide) Composites
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Surface Modification of Halloysite Nanotubes with L-lactic Acid: An Effective Route to High-Performance Poly(L-lactide) Composites

机译：L-乳酸对埃洛石纳米管的表面改性：高性能聚（L-丙交酯）复合材料的有效途径

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摘要

To improve the interfacial bonding between halloysite nanotubes (HNTs) and poly(L-lactide) (PLLA), a simple surface modification of HNTs with L-lactic acid via direct condensation polymerization has been developed. Two modified HNTs were obtained: HNTs grafting with L-lactic acid (l-HNTs) and HNTs grafting with poly(L-lactide) (p-HNTs). The structures and properties of l-HNTs and p-HNTs were investigated. Then, a series of HNTs/PLLA, l-HNTs/PLLA and p-HNTs/PLLA composites were prepared using a solution casting method and were characterized by polarized optical microscopy (POM), field scanning electron microscopy, and tensile testing. Results showed that L-lactic acid and PLLA could be easily grafted onto the surface of HNTs by forming an Al carboxylate bond and following with condensation polymerization, and the amounts of the L-lactic acid and PLLA grafted on the surface of the HNTs were 5.08 and 14.47%, respectively. The surface-grafted L-lactic acid and PLLA played the important role in improving the interfacial bonding between the nanotubes and matrix. The l-HNTs and p-HNTs can disperse more uniformly in and show better compatibility with the PLLA matrix than untreated HNTs. As a result, the l-HNTs/PLLA and p-HNTs/PLLA composites had better tensile properties than that of the HNTs/PLLA composites. (C) 2014 Wiley Periodicals, Inc.
机译：为了改善埃洛石纳米管（HNT）和聚（L-丙交酯）（PLLA）之间的界面键，已开发了一种通过直接缩聚用L-乳酸对HNT进行简单表面改性的方法。获得了两种改性的HNT：用L-乳酸（1-HNT）接枝的HNT和用聚（L-丙交酯）（p-HNT）接枝的HNT。研究了l-HNT和p-HNT的结构和性质。然后，使用溶液流延法制备一系列HNT / PLLA，1-HNT / PLLA和p-HNT / PLLA复合材料，并通过偏振光学显微镜（POM），场扫描电子显微镜和拉伸测试对其进行表征。结果表明，通过形成羧酸铝键并进行缩聚反应，可以很容易地将L-乳酸和PLLA接枝到HNTs表面，接枝到HNTs表面的L-乳酸和PLLA的量为5.08。和14.47％。表面接枝的L-乳酸和PLLA在改善纳米管和基质之间的界面键方面起着重要作用。与未处理的HNT相比，l-HNT和p-HNT可以更均匀地分散在PLLA基质中并显示出更好的相容性。结果，1-HNT / PLLA和p-HNT / PLLA复合材料具有比HNT / PLLA复合材料更好的拉伸性能。 （C）2014威利期刊公司

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