Ding Peng, Qu Baojun
Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, China.
J Colloid Interface Sci. 2005 Nov 1;291(1):13-8. doi: 10.1016/j.jcis.2005.08.056.
Exfoliated polystyrene (PS)/ZnAl layered double hydroxide (LDH) nanocomposites have been synthesized via emulsion polymerization in the presence of N-lauroyl-glutamate surfactants and long-chain n-hexadecane. The samples were characterized using elemental analysis, Fourier transform infrared (FTIR) spectrum, X-ray diffraction (XRD), transmission electron microscopy (TEM), and thermogravimetric analysis (TGA). The XRD and TEM results demonstrate that the exfoliated ZnAl-LDH layers of 50-70 nm width and about 1 nm thickness were well dispersed at molecular level in the PS matrix. And the completely exfoliated PS/LDH nanocomposites can be obtained even at the 10 wt% LDH loading. When the 50% weight loss was selected as a comparison point, the decomposition temperature of exfoliated PS/LDH sample with 5 wt% LDH was ca. 28 degrees C higher than that of pure PS.
通过在N-月桂酰谷氨酸表面活性剂和长链正十六烷存在下的乳液聚合反应，合成了剥离型聚苯乙烯（PS）/锌铝层状双氢氧化物（LDH）纳米复合材料。使用元素分析、傅里叶变换红外（FTIR）光谱、X射线衍射（XRD）、透射电子显微镜（TEM）和热重分析（TGA）对样品进行了表征。XRD和TEM结果表明，宽度为50-70nm、厚度约为1nm的剥离型ZnAl-LDH层在分子水平上很好地分散在PS基体中。即使在LDH负载量为10wt%时，也可以获得完全剥离的PS/LDH纳米复合材料。当选择50%失重作为比较点时，含5wt%LDH的剥离型PS/LDH样品的分解温度比纯PS高约28℃。
