壳聚糖/酸化蛭石纳米复合材料的制备与表征

摘要

以可生物降解材料壳聚糖为基体,制备了一系列不同比例的壳聚糖/酸化蛭石(HVMT)纳米复合材料.WAXD和TEM试验结果表明HVMT可以有效剥离并分散在壳聚糖基体中形成剥离型纳米复合材料.与壳聚糖相比,纳米复合材料的热性能随着酸化蛭石含量的增加有明显提高,在蛭石含量仅为2%的情况下,材料的T<,-10%>增加了141℃.%In this study, the biopolymer chitosan/acid-modifled vermiculite (VMT) nanocomposites were prepared by the solution mix-ing process of the cationic biopolymer chitosan with chloride hydride modified VMT (HVMT). Wide-angle X-ray diffraction (WAXD), transmission electron microscopy (TEM), and thermogravimetric analysis (TGA) have been employed in the characteriza-tion of chitosan/HVMT nanocomposites. Both WAXD data and TEM images of chitosan nanocomposites indicated that the silicate layers were disorderedly dispersed into the chitosan matrix in nano scale. The thermal stability of chitosan/HVMT nanocomposites have the greatest improvements compared to that of neat chitosan.