阳-非离子型有机蒙脱石制备、表征和机理
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摘要
利用阳离子改性剂十六烷基三甲基溴化铵(CTAB)和非离子改性剂烷基酚聚氧乙烯醚(OP-10)对钙基蒙脱石进行湿法改性制得阳-非离子型有机蒙脱石,采用X射线衍射、傅里叶变换红外光谱、扫描电子显微镜和热重分析等手段对制得的蒙脱石进行表征,并对机理进行讨论。结果表明:CTAB与OP-10可以同时嵌入到蒙脱石层间,阳-非离子型有机蒙脱石的片层膨胀程度和改性效果优于单阳离子型有机蒙脱石的,表现出更好的热稳定性;投料顺序对阳-非离子型有机蒙脱石的改性效果没有影响。
C a-montomrillonite was intercalation modified with cationic surfactant hexadecyl trimethyl ammonium bromide(CTAB) and nonionic surfactant alkylphenol ethoxylates(OP-10) in aqueous suspension. The performances of Ca-montomrillonite-CTAB-OP-10 samples were characterized by XRD, FTIR, SEM and TG. The mechanism of modification was discussed. The results show that CTAB and OP-10 can successfully intercalate into Ca-montomrillonite. The expansion degree of layer and modified effect of organic montmorillonite are better than those of Ca-montomrillonite-CTAB, and Ca-montomrillonite-CTAB-OP-10 samples exhibit better thermal stability. The order of adding surfactant has no effect on modification of Ca-montomrillonite.
C a-montomrillonite was intercalation modified with cationic surfactant hexadecyl trimethyl ammonium bromide(CTAB) and nonionic surfactant alkylphenol ethoxylates(OP-10) in aqueous suspension. The performances of Ca-montomrillonite-CTAB-OP-10 samples were characterized by XRD, FTIR, SEM and TG. The mechanism of modification was discussed. The results show that CTAB and OP-10 can successfully intercalate into Ca-montomrillonite. The expansion degree of layer and modified effect of organic montmorillonite are better than those of Ca-montomrillonite-CTAB, and Ca-montomrillonite-CTAB-OP-10 samples exhibit better thermal stability. The order of adding surfactant has no effect on modification of Ca-montomrillonite.
引文
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[2]陈得芳,王重,李运康.有机膨润土的性能与结构关系的研究[J].西安交通大学学报,2000,34(8):92-95.
[3]刘温霞,倪永浩,肖惠宁.阳离子有机蒙脱石的制备与特征[J].中国造纸学报,2005,20(1):169-173.
[4]马月红,何宏平,朱建喜,等.阳离子交换容量和烷基链链数对有机蒙脱石性能的影响[J].矿物学报,2010(1):9-17.
[5]邓梦祥,许荣棋.层间阳离子对蒙脱石性质的影响[J].无机材料学报,1992,7(1):87-92.
[6]LIU Huabin,HAN Ningxiao.Investigation on intercalation modification of sodium-montmorillonite by cationic surfactant[J].Journal of Inorganic Materials,2012,27(7):780-784.
[7]曾少雁,吴平霄.C10TAB,C14TAB,C18TAB柱撑蒙脱石层间域有机柱排布研究[J].矿物岩石,2005,25(3):58-62.
[8]刘宏生,高芒来,杨莉,等.单分子烷基季铵盐改性蒙脱石性能分析[J].中国石油大学学报:自然科学版,2008,32(4):136-141.
[9]SHEN Y H.Preparations of organobentonite using nonionic surfactants[J].Chemosphere,2001,44(5):989-995.
[10]张泽朋,万芳,廖立兵,等.阴-非离子型有机蒙脱石粉体的制备和表征[J].中国粉体技术,2013,19(1):34-37.
[11]WANG C C,JUANG L C,LEE C K.Effects of exchanged surfactant cations on the pore structure and adsorption characteristics of montmorillonite[J].Journal of Colloid and Interface Science,2004,280(1):27-35.
[12]吴平霄,张惠芬.蒙脱石热处理产物的扫描电镜研究[J].矿物岩石,1999,19(1):19-23.