Finite Dilution Inverse Gas Chromatography as a Versatile Tool To Determine the Surface Properties of Biofillers for Plastic Composite Applications

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• 作者：Zhitong Yao ; Liuqin Ge ; Wenye Yang ; Meisheng Xia ; Xiaosheng Ji ; Meiqing Jin ; Junhong Tang ; J眉rgen Dienstmaier
• 刊名：Analytical Chemistry
• 出版年：2015
• 出版时间：July 7, 2015
• 年：2015
• 卷：87
• 期：13
• 页码：6724-6729
• 全文大小：329K
• ISSN：1520-6882

文摘

An improved understanding of a filler鈥檚 surface properties is important for determining the most effective polymer reinforcement fillers. In this work, the surface characteristics of two biofillers, namely, clam shell modified by hydrochloric acid (AMF) and furfural (FMF), were investigated using inverse gas chromatography (IGC). The IGC results showed that the dispersive surface energy (纬_S^D) contributed the major part to the total surface energy for the biofillers. The values changed as a function of surface coverages, meaning that both samples were energetically fairly heterogeneous. The 纬_S^D calculated with the Dorris鈥揋ray method was larger than that calculated with the Schultz method, with a 纬_{S,Dorris鈥揋ray}^D/纬_S,Schultz^D ratio of 1.10. Compared to AMF, FMF possessed higher 纬_S^D value; however, this difference was compensated by specific (acid鈥揵ase) surface energy (纬_S^AB). Both samples predominantly interacted with ethanol and acetonitrile, implying an amphoteric nature of the material surfaces. Gutmann acid and base number profiles indicated that the surfaces of both samples were more basic in nature. The FMF showed a lower total work of cohesion (W_Coh^total) value compared to the AMF, which could lead to an increase in composite performance.