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烷基季铵阳离子改性制备有机粘土的研究及应用进展 被引量:7
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作者 宋海明 张宝述 +2 位作者 孙红娟 彭同江 宋绵新 《中国非金属矿工业导刊》 2007年第4期7-10,共4页
蒙脱石是属于2∶1型层状硅酸盐类粘土矿物,具有优异的物理化学性能。近年来,烷基季铵盐改性的有机膨润土作为一种新型的化学、化工原料在环境保护和新材料等应用方面引起了广泛的关注并且已成为当前材料科学的研究热点之一。本文概括了... 蒙脱石是属于2∶1型层状硅酸盐类粘土矿物,具有优异的物理化学性能。近年来,烷基季铵盐改性的有机膨润土作为一种新型的化学、化工原料在环境保护和新材料等应用方面引起了广泛的关注并且已成为当前材料科学的研究热点之一。本文概括了蒙脱石、烷基季铵盐的结构特征;阐述了有机膨润土的制备原理及合成工艺;介绍了有机蒙脱石的表征技术和现阶段研究成果;最后对有机粘土应用及发展前景进行了概述和展望。 展开更多
关键词 蒙脱石 烷基离子 有机粘土 改性 粘土矿物
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新型季铵烷基阳离子单体YJJ的合成 被引量:3
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作者 于俊杰 马希晨 曹亚峰 《大连轻工业学院学报》 2003年第2期94-96,共3页
以十二烷基二甲胺与环氧氯丙烷进行季铵化反应,合成新型长链烷基季铵阳离子单体十二烷基二甲基环氧丙基氯化铵(YJJ)。通过对比实验,研究了反应介质及其用量、物料比、反应温度、反应时间对十二烷基二甲胺转化率的影响。最终确定了一条... 以十二烷基二甲胺与环氧氯丙烷进行季铵化反应,合成新型长链烷基季铵阳离子单体十二烷基二甲基环氧丙基氯化铵(YJJ)。通过对比实验,研究了反应介质及其用量、物料比、反应温度、反应时间对十二烷基二甲胺转化率的影响。最终确定了一条合成十二烷基二甲基环氧丙基氯化铵(YJJ)的最佳工艺。物料比为n(环氧氯丙烷)∶n(十二烷基二甲胺)=1.2∶1,反应温度为55℃,反应时间为5h。 展开更多
关键词 烷基离子单体 十二烷基二甲胺 环氧氯丙烷 合成工艺
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C_(10)TAB,C_(14)TAB,C_(18)TAB柱撑蒙脱石层间域有机柱排布研究 被引量:13
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作者 曾少雁 吴平霄 《矿物岩石》 CAS CSCD 北大核心 2005年第3期58-62,共5页
用十烷基三甲基溴化铵(C10TAB)、十四烷基三甲基溴化铵(C14TAB)和十八烷基三甲基溴化铵(C18TAB)制备有机柱撑蒙脱石,并对产物进行X射线衍射表征。研究结果表明:柱化剂的浓度和烷基季铵离子的性质能影响烷基季铵离子在蒙脱石层间的排布... 用十烷基三甲基溴化铵(C10TAB)、十四烷基三甲基溴化铵(C14TAB)和十八烷基三甲基溴化铵(C18TAB)制备有机柱撑蒙脱石,并对产物进行X射线衍射表征。研究结果表明:柱化剂的浓度和烷基季铵离子的性质能影响烷基季铵离子在蒙脱石层间的排布模式。在柱化剂浓度较低时易形成平卧排列,柱化剂达到一定浓度时石蜡型结构方能形成,且直链烷基越长,烷基季铵离子在蒙脱石层间越易形成石蜡型倾斜排列。在平卧结构向石蜡型结构转化过程中可出现多种排列共存。 展开更多
关键词 烷基季铵离子 排布模式 有机柱撑蒙脱石
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Sorption of Acid Dyes onto Silica Modified with Cetyltrimethylammonium Cations 被引量:3
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作者 TahirImranQureshi Dong-IkSong +1 位作者 Young-WoongJeon Young-SupLee 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2002年第1期102-108,共7页
The sorption behavior of acid dyes onto cetyltrimethylammonium bromide (CTAB)- modified silica as a function of pH in the aqueous medium was studied. Single- and multi-solute sorption equilibria of orange II(OR), phen... The sorption behavior of acid dyes onto cetyltrimethylammonium bromide (CTAB)- modified silica as a function of pH in the aqueous medium was studied. Single- and multi-solute sorption equilibria of orange II(OR), phenol red (PR) and Eriochrome Black T (EBT) were studied at pH 3, unbuffered water pH and pH 11. Sorption behavior of EBT could not be conducted at pH 3 due to its aggregation in acidic medium. All the reaction conditions, experimental protocols and techniques remained the same throughout the sorption process. Sorption isotherms for single-solute system were fitted by the Langmuir model, while Langmuir competitive model (LCM) and the ideal adsorbed solution theory (IAST) coupled with Langmuir model (IAST/Langmuir) were used for the prediction of multisolute competitive sorption. Sorption affinities influenced by the factors like physical interactive forces between the molecules of CTA on silica and sorbate, structural limitations of the dyes based on their geometrical arrangement were investigated. Sorption affinity of OR was found to be higher than that of EBT and PR at all the pH values investigated. Magnitude of the sorption capacities was observed to be higher in acidic medium but lower in alkaline medium. Trends of the sorption affinities in multisolute system were similar to those in single-solute system but magnitude of the sorption capacities was significantly reduced due to the prevailing competition among the sorbates. 展开更多
关键词 CTAB SILICA SORPTION acid dyes
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Tetraalkylammonium Fluorosilicates as Precursors for Electrochemical Deposition of Silicon Coatings. Synthesis and Thermal Stability
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作者 Oleksandr Gudymenko Volodymyr Glushakov Oleg Boiko 《Journal of Chemistry and Chemical Engineering》 2015年第6期371-374,共4页
Several TAAFS (tetraalkylammonium hexafluorosilicates) with different cations were synthesized. Their thermal properties were studied showing that obtained complexes are stable enough to be suitable for electrochemi... Several TAAFS (tetraalkylammonium hexafluorosilicates) with different cations were synthesized. Their thermal properties were studied showing that obtained complexes are stable enough to be suitable for electrochemical deposition of silicon coatings under temperatures at least up to 200 ℃. 展开更多
关键词 TAAFS electrochemical deposition Silicon coatings SYNTHESIS thermal stability.
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