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3850362 
Journal Article 
Mechanism of Inorganic-organic Surface Modification of Anhydrous Calcium Sulfate Whisker 
Lv Zhi-Hui; Hong Tian-Zeng; Nai Xue-Ying; Dong Ya-Ping; Li Wu 
2017 
1 
Wuji Cailiao Xuebao
ISSN: 1000-324X 
32 
1 
81-85 
WOS:000394920700013 
Anhydrous calcium sulfate whisker (ACSw) was modified by dual-surface modification with sodium silicate solution as inorganic modifer and stearic acid as organic modifier. The samples were characterized by water contact angle (WCA), X-ray diffraction (XRD), field emission scanning electron microscope(FESEM), fourier infrared spectrum (FT-IR), and X-ray photoelectron spectroscope (XPS). The results showed that ACSw surface property changed to Hydrophobic after inorganic-organic modification, while its crystal structure remained unchanged. FT-IR and XPS resutls indicated that -Ca-SiO3 structure was generated firstly on the surface of whiskers after reaction with sodium silicate solution. And then a mixing coating layer containing both -Ca-HSiO3 and -Ca-COOR structures were formed through bonding interaction with stearic acid rather than physical absorption after particle hydrolyzation of -Ca-SiO3 structure. 
anhydrous calcium sulfate whisker; dual-surface modification; chemical adsorption