Study on the mechanism of surface modification of magnesium oxysulfate whisker

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	Study on the mechanism of surface modification of magnesium oxysulfate whisker
	Dang, Li 1,2; Nai, Xueying1 ; Zhu, Donghai 1; Jing, Yanwei 1,2; Liu, Xin1 ; Dong, Yaping1 ; Li, Wu 1
	2014-10-30
发表期刊	APPLIED SURFACE SCIENCE
卷号	317 页码:325-331
关键词	Magnesium Oxysulfate Whisker Surface Modification "acid Base Neutralization"
摘要	Hydrophobic-lipophilic magnesium oxysulfate whisker (MOSw) was prepared by surface modification with lauric acid and the surface morphology of MOSw was examined with field emission scanning electron microscope (FESEM). X-ray powder diffraction (XRD) was used to characterize the crystalline degree of MOSw and modified MOSw (MOSw-LA). Both FESEM and XRD suggested that modification occurred on the surface of MOSw exclusively. The inexistence of physisorbed lauric acid was proved by Fouier transform infrared (FT-IR) spectroscopy. Thermogravimetric analyses ruled out the possibility that magnesium laurate (LA-Mg) physisorbed on the surface of MOSw-LA. Solid state C-13 nuclear magnetic resonance (13C NMR) further verified the formation of COO-Mg< bonds based on the significant changes of chemical shift and decrease in intensity. Hence, we confirmed that the type of surface modification of MOSw with lauric acid was chemical adsorption taken place between lauric acid and Mg<. In order to study the dynamic state approach of this reaction, a pH meter was employed to monitor the reaction process synchronously, and then we proposed a reaction mechanism which was similar to the "acid-base neutralization". This research provides a detailed explanation for a kind of surface modification, which may be further used in the performance of whisker/polymer matrix composites. (C) 2014 Published by Elsevier B.V.
语种	英语
引用统计
文献类型	期刊论文
条目标识符	http://ir.isl.ac.cn/handle/363002/5721
专题	青海盐湖研究所知识仓储中国科学院青海盐湖研究所盐湖资源综合利用工程技术中心
作者单位	1.Chinese Acad Sci, Qinghai Inst Salt Lakes, Xining 810008, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Dang, Li,Nai, Xueying,Zhu, Donghai,et al. Study on the mechanism of surface modification of magnesium oxysulfate whisker[J]. APPLIED SURFACE SCIENCE,2014,317:325-331.
APA	Dang, Li.,Nai, Xueying.,Zhu, Donghai.,Jing, Yanwei.,Liu, Xin.,...&Li, Wu.(2014).Study on the mechanism of surface modification of magnesium oxysulfate whisker.APPLIED SURFACE SCIENCE,317,325-331.
MLA	Dang, Li,et al."Study on the mechanism of surface modification of magnesium oxysulfate whisker".APPLIED SURFACE SCIENCE 317(2014):325-331.