title: [Synthesis and characterization of CTMAB and PDMDAAC modified organobentonite].
abstract: The natural bentonite was purified and changed to sodium form by NaCl via exchange reaction. Their characteristics, such as swelling volume, swelling value, colloid valence, ethylene blue adsorbed and cation exchange capacity, were measured. The results indicate that the property of Na-bentonite is better than that of natural bentonite. Using cetyltrimethylammonium bromide (CTMAB) and homopolymer of dimethyldiallyammomium chloride (PDMDAAC) as organo-intercalating reagents, two organic modified bentonites were prepared and characterized by Fourier transform infrared (FTIR), X-ray powder diffraction (XRD) and BET surface area. The XRD results showed that the CTMAB-bentonite and PDMDAAC-bentonite had typical X-ray diffraction peaks, and the d001 values increased to 1.89 and 1.45 nm, respectively. Combined with the results of FTIR, the modified reagents had been intercalated to the layer of bentonite. The BET areas, pore volumes and average pore diameters of the two organo-bentonites were decreased as compared to that of Na-bentonite.
authors.affiliation: School of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China. yanyu-33@163.com
authors.forename: Hai-qin
authors.initials: HQ
authors.lastname: Yu
authors.forename: Liang-guo
authors.initials: LG
authors.lastname: Yan
authors.forename: Xiao-dong
authors.initials: XD
authors.lastname: Xin
authors.forename: Bin
authors.initials: B
authors.lastname: Du
authors.forename: Qin
authors.initials: Q
authors.lastname: Wei
authors.forename: Yu-hua
authors.initials: YH
authors.lastname: Fan
authors.forename: Cai-feng
authors.initials: CF
authors.lastname: Bi