文献类型：期刊文献

英文题名：Preparation and physical properties of chitosan-coated calcium sulphate whiskers

作者：Jiang, Qing[1];Cheng, Yun[1];Cao, Xiu-Ying[1];Wei, Rui[1];Zhao, Min[1]

机构：[1]E China Univ Sci & Technol, Shanghai 200237, Peoples R China

年份：2014

卷号：68

期号：10

起止页码：1400

外文期刊名：CHEMICAL PAPERS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000338283600014)】；

语种：英文

外文关键词：calcium sulphate whiskers; chitosan coating; solubility; sol-gel

摘要：To improve the performance of calcium sulphate whiskers (CSWs) in the papermaking industry, a series of chitosan-coated (CS) calcium sulphate whiskers (CS-CSWs) was prepared, with the aim of effectively reducing their solubility in aqueous solutions. The CS-CSWs were prepared by immersing CSWs in a chitosan acid solution and then cross-linking with alkaline gel via hydrogen-bonding interaction. The CS-CSWs were characterised in terms of water solubility, zeta potential, contact angle, scanning electron microscopy, thermo gravimetric analysis and X-ray photoelectron spectroscopy (XPS). The results indicated that chitosan had a good effect on the surface modification of CSWs. Under optimal conditions, the water solubility of CS-CSWs decreased by 50 %, and the contact angle increased by 63 %. The XPS measurement indicated that the relative thickness of the chitosan coating was 9.8 nm. (C) 2014 Institute of Chemistry, Slovak Academy of Sciences