Study on the mechanism of surface modification of magnesium oxysulfate whisker

• DOI: 10.1016/j.apsusc.2014.07.205
• Publication Date: 2014-08-14T19:49:58Z
• Authors: Li Dang; Xueying Nai; Donghai Zhu; Yanwei Jing; Xin Liu; Yaping Dong; Wu Li
• Keywords: 01 natural sciences; 0104 chemical sciences

Abstract 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 13C nuclear magnetic resonance (13C NMR) further verified the formation of COO–Mg