| 摘要: |
| 以四甲基溴化铵(TMAB)、四乙基溴化铵((Et)4NB)、二价季铵盐(MD膜驱剂)、十二烷基三甲基溴化铵 (DTAB)和十六烷基三甲基溴化铵(CTAB)为改性剂,考察改性蒙脱石的膨胀性、含水量和吸附董，并对改性蒙脱石 用X射线衍射(XRD)、傅里叶红外(FT-IR)和热重(TG)分析表征。结果表明:TMAB,(Et)4NB和MD膜驱剂主要以 单分子平躺在蒙脱石晶层间，使层间距降低,有较好的防膨作用;DTAB和CTAB可以在蒙脱石晶层间以单层平卧、双层平卧、假三层及倾斜等多种方式排列，使层间距增加;在相同浓度时，蒙脱石对(Et)4NB或MD膜驱剂的吸附量 低于对TMAB,DTAB和CTAB的吸附量。 |
| 关键词: 改性蒙脱石 季铵盐 MD膜驱剂 膨胀性 |
| DOI： |
| 分类号: |
| 基金项目:北京市教委共建计划项目(XK114140479) |
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| Property analysis of organic modified montmorillonite by single molecule alkyl quaternary ammonium salts |
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LIU Hong-sheng1,2,GAO Mang-lai1,YANG Li1,2,HAN Fan-zhen1
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(1. Faculty of Chemistry and Chemical Engineering in China University of Petroleum, Beijing 102249 China;2. Exploration and Development Research Institute of Daqing Oilfield Company Limited, Daqing 163712，Heilongjiang Province, China )
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| Abstract: |
| X-ray diffraction (XRD) , Fourier transform infrared spectrometer (FT-IR) and thermogravimetry (TG) analysis methods were applied to investigate the properties of organic modified montmorillonite by tetramethyl ammonium bromide (TMAB)，tetraethyl ammonium bromide ( (Et)4NB)，molecular deposition filming flooding agent (MDFFA) , dodecyl trimethyl ammonium bromide ( DTAB) and hexadecyl trimethyl ammonium bromide (CTAB). The results show that TMAB,(Et)4NB and MDFFA have superior anti-swelling effect on montmorillonite，DTAB and CTAB make montmorillonite swelling. At the same concentration, the quantity of (Et)4NB or MDFFA which was adsorbed on montmorillonite is less than that of TMAB, DTAB or CTAB. |
| Key words: modiiled montmorillonite quaternary ammonium salt molecular deposition filming flooding agent( MDFFA) distensibility |
