Preparation And Performance Study Of Compound Organosilicon-SiO₂Hybrid Material

In this thesis, we have utilized sol-gel process to prepare compoundorganosilicon-SiO₂hybrid material, fourfold silxane rings of hybrid material werecharacterized through FT-IR、XRD and XPS. We optimized raw materials fromdifferent kinds of organosiloxane, inorganic, surfactant, silane coupling agent andquartz sand according to compression strength and heat resistance of material andobtained the optimized formula. And the technology of preparation and formingwere optimized under optimized formula. Furthermore, the process of hydrolysis oforganosiloxane and formation of fourfold silxane rings were characterized throughFT-IR, and studied the relationship between compression strength of hybridmaterial and the peak fit and aera of fourfold silxane rings in1200¹000cm-1through FT-IR. The main conclusions were listed as follows:1、The optimum components and mixing ratios was investigated and it wascomposed of tetraethoxysilane（TEOS）, methyltriethoxysilane（MTES）, sodiumsilicate, composite silane coupling agent, cetyl trimethyl ammonium bromide（CTAB） and quartz sand with the mass mixing proportion of7:2:0.4:0.1:0.01:14.The molar ratio of KH-550and KH-792was1:3.2、The technology of preparation and forming were optimized under optimizedformula, the results showed that the compression strength was higher underconditions of pH and salinity of brine was7.42and10.109g·L-1, respectively.The compression strength could reach6.41MPa. Meanwhile, the hybrid materialpossess high thermal and chemical stabilities.3、The results showed that acid and high salinity of brine was helpful tohydrolysis, while alkali and appropriate salinity was favorable to formation offourfold silxane rings. Some research were did on the relationship betweencompression strength and peak fit and aera of Infrared absorption peaks in theregion of1200¹000cm-1and it was discovered that the closer of peak to1080cm-1, the greater of compression strength of hybrid material. And the peak area ofabsorption peaks were positively correlated to compression strength of material,that is, the greater of peak aera, the greater of compression strength.