Synthesis and properties of fluorosilane treated nano-Al2O3 hybrid modified styrene-divinylbenzene copolymers

Styrene-divinylbenzene copolymer (SDB) was an important hydrophobic catalyst carrier for hydrogen-water liquid-phase catalytic exchange (LPCE) technology. In this paper, nano-Al 2 O 3 was hydrophobically modified with 1 H, 1 H, 2 H, 2 H-perfluorodecyltrimethoxysilane (HFTMS) and 1 H, 1 H, 2 H, 2 H-perfluorooctyltriMethoxysilane (PFOTMS), giving HFTMS-Al 2 O 3 and PFOTMS-Al 2 O 3 . In order to improve the hydrophobicity and strength of SDB carrier, HFTMS-Al 2 O 3 and PFOTMS-Al 2 O 3 were respectively doped into SDB by suspension polymerization , providing modified SDB carriers HFTMS-Al 2 O 3 /SDB and PFOTMS-Al 2 O 3 /SDB. Results show that the modified carriers have a specific surface area of 434.613 m 2 /g and 423.017 m 2 /g, a hydrophobic angle of 146.94° (close to super-hydrophobic) and 138.25° (strongly hydrophobic), a compressive strength of 91.6 N and 50.7 N, and a better stability of hydrophobic property than SDB. Generally, the modified SDB carriers have very good hydrophobicity and compressive strength , which could be used for tritiated wastewater treatment .