文献类型：期刊文献

英文题名：Effect of inorganic-organic surface modification of calcium sulfate whiskers on mechanical and thermal properties of calcium sulfate whisker/poly(vinyl chloride) composites

作者：Lu, Yunhua[1];Jiang, Nan[2];Li, Xingwei[1];Xu, Shiai[1,2]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Ultrafine Mat, Minist Educ, Shanghai 200237, Peoples R China;[2]Qinghai Univ, Sch Chem Engn, Xining 810016, Qinghai, Peoples R China

年份：2017

卷号：7

期号：73

起止页码：46486

外文期刊名：RSC ADVANCES

收录：;EI(收录号：20174104250058);WOS:【SCI-EXPANDED(收录号:WOS:000412211300071)】；

基金：This research is financially supported by the National Natural Science Foundation of China (U 1507123), the Foundation from Qinghai Science and Technology Department and Thousand Talents Program of Qinghai Province.

语种：英文

外文关键词：Scanning electron microscopy - Surface treatment - Adhesion - Fourier transform infrared spectroscopy - Thermodynamic properties - Chlorine compounds - Interfaces (materials) - Polyvinyl chlorides - Calcium carbonate - Mixtures - Coupling agents - Fillers - Energy dispersive spectroscopy - Hydrated lime - Sulfur compounds - X ray diffraction - X ray photoelectron spectroscopy

摘要：Coupling agents are traditionally used to improve the interfacial adhesion between inorganic fillers and a polymer matrix; however, the application of this method is somewhat limited by the number of hydroxyl groups on the surface of inorganic fillers. In this study, a layer of calcium hydroxide (Ca(OH) 2) was coated on the surfaces of calcium sulfate whiskers (CSW) through hydroxylation modification using sodium hydroxide (NaOH) to increase the hydroxyl groups of the CSW, and then a polyether titanate coupling agent synthesized in our lab was used to modify Ca(OH) 2 coated CSW in order to improve their compatibility with poly(vinyl chloride) (PVC). The chemical structure and surface properties of the modified CSW were characterized by X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS) and water contact angle (WCA). Then, CSW/PVC and modified CSW/PVC composites were prepared via a two-roll mill, and the effects of the inorganic-organic surface modification of CSW on their mechanical and thermal properties were evaluated. The results show that hydroxylation modification can further improve the compatibility and the interfacial adhesion between CSW and the PVC matrix, which results in better mechanical and thermal properties.