Chivrac Frédéric, Pollet Eric, Schmutz Marc, Avérous Luc
ECPM-LIPHT (UMR CNRS 7165), Université Louis Pasteur, 25 Rue Becquerel, F-67087 Strasbourg Cedex 2, France.
Biomacromolecules. 2008 Mar;9(3):896-900. doi: 10.1021/bm7012668. Epub 2008 Feb 21.
The present paper reports the successful elaboration of exfoliated plasticized starch-based nanobiocomposites. This was made possible by using cationic starch as a new clay organomodifier to better match the polarity of the matrix and thus to facilitate the clay exfoliation process. To demonstrate the efficiency of this new approach, either natural (MMT-Na) or organomodified (OMMT-CS) montmorillonite were incorporated into the starch nanobiocomposites by a melt blending process. The morphological analyses (SAXD and TEM) showed that MMT-Na leads to the formation of intercalated nanobiocomposites. On the contrary, OMMT-CS allowed the elaboration of well-exfoliated nanobiocomposites. Tensile tests performed on the obtained nanobiocomposites showed that exfoliated nanobiocomposites display enhanced mechanical properties compared to those of the intercalated nanobiocomposites and neat matrix. These results clearly highlight the great interest in using OMMT-CS to obtain starch-based nanobiocomposites with improved properties.
本文报道了基于剥离型增塑淀粉的纳米生物复合材料的成功制备。这是通过使用阳离子淀粉作为一种新型粘土有机改性剂来实现的，以更好地匹配基体的极性，从而促进粘土的剥离过程。为了证明这种新方法的有效性，通过熔融共混工艺将天然蒙脱石（MMT-Na）或有机改性蒙脱石（OMMT-CS）掺入淀粉纳米生物复合材料中。形态分析（SAXD和TEM）表明，MMT-Na导致形成插层纳米生物复合材料。相反，OMMT-CS能够制备出良好剥离的纳米生物复合材料。对所得纳米生物复合材料进行的拉伸试验表明，与插层纳米生物复合材料和纯基体相比，剥离型纳米生物复合材料具有增强的机械性能。这些结果清楚地表明，使用OMMT-CS来获得具有改进性能的淀粉基纳米生物复合材料具有很大的意义。
