Synthesis and Characterization of CTMAB and PDMDAAC Modified Organobentonite
YU Hai-qin1,2, YAN Liang-guo3, XIN Xiao-dong3, DU Bin3, WEI Qin2, FAN Yu-hua1, BI Cai-feng1*
1. School of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China 2. School of Chemistry and Chemical Engineering, University of Jinan, Ji’nan 250022, China 3. School of Resources and Environmental Sciences, University of Jinan, Ji’nan 250022, China
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.
Key words：Bentonite;Cetyltrimethylammonium bromide;Homopolymer of dimethyldiallyammomium chloride;XRD;FTIR
[1] WU Ping-xiao(吴平霄). Clay Minerals and Environmental Remediation(黏土矿物材料与环境修复). Beijing：Chemical Industry Press(北京: 化学工业出版社), 2004. [2] Yariv S, Cross H. Organo-Clay Complexes and Interactions. New York：Marcel Dekker, 2002. [3] Bergaya F, Theng B K G, Lagaly G. Handbook of Clay Science. Amsterdam：Elsevier, 2006. [4] ZHU Li-zhong, CHEN Bao-liang(朱利中，陈宝梁). Preparation of Organobentonite and its Application in Pollution Control(有机膨润土及其在污染控制中的应用). Beijing: Science Press(北京: 科学出版社), 2006. [5] WANG Wei-qing, FENG Qi-ming, DONG Fa-qin, et al(王维清, 冯启明, 董发勤, 等). Journal of the Chinese Ceramic Society(硅酸盐学报), 2010, 38(4): 684. [6] Yan L, Wang J, Yu H, et al. Applied Clay Science，2007, 37: 226. [7] Akcay M. Journal of Colloid and Interface Science, 2004, 280(2): 299. [8] Zhu L, Chen B, Tao S, et al. Environmental Science Technology, 2003, 37: 4001. [9] Sánchez-Martín M J, Rodríguez-Cruz M S, Sánchez-Camazano M. Water Research, 2003, 37(13): 3110. [10] SU Jin, WANG Qing-ping, JIN Xiao-ying, et al(苏 锦, 王清萍, 金晓英, 等). Environmental Pollution & Control(环境污染与防治), 2010, 32(3): 39. [11] SUN Hong-liang, ZHU Li-zhong(孙洪良, 朱利中). Acta Scientiae Circumstantiae(环境科学学报), 2010, 30(5): 1037. [12] Komadel P. Clay Miner，2003, 38: 127. [13] Shen Y H. Chemosphere, 2001, 44: 989. [14] Yapar S, zbudak V, Dias A, et al. Journal of Hazardous Material, 2005, 121: 135. [15] Lin S-H, Juang R-S. Journal of Hazardous Material, 2002, 92: 315.
