权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Synthesis and Hydrophobic Interlayr Property of Anionic surfactants - pillared Layred Double Hydroxides

阴离子表面活性剂柱撑层状双氢氧化物的合成及疏水层间性能

基本信息

批准号：
06650957
负责人：
NARITA Eiichi
金额：
$ 1.28万
依托单位：
Iwate University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1994
资助国家：
日本
起止时间：
1994 至 1995
项目状态：
已结题

项目摘要

To synthesize an effective hydrophobic adsorbent from a layred double hydroxide (LDH) and anionic surfactants (AS), the incorporation of AS by the clacined product, Mg_<0.58>Al_<0.28>*_<0.14>O,which was prepared by thermal decomposition of a synthetic Mg-Al carbonated LDH, Mg_<0.67>Al_<0.33> (OH) _2 (CO_3) _<0.17>・0.5H_2O (theoretical fomula), was carried out at 25ﾟC.The calcined product was found to adsorb highly laurate, docylsulfate or dodecylbenzenesulfonate ion from aqueous solution with reconstructing the LDH layr structure (the reconstruction method) in which AS was incorporated as bilayr in the gallery, and the adsorption isotherms of these AS were obtained. Therefore, the AS-pillared LDHs obtained from the aqueous solutions of high AS concentrations have large gallery height of d_<003>=31-38A.The AS-pillared LDHs were also found to have hydrophobic gallery space and to indicate the high adsorption ability for the organic compounds without electric charge such as benzyl alcohol, n-amyl alcohol and linalool. The LDH structure was not changed after the adsorption experiments. The Freundlich's adsorption isotherm was available for all cases and the adsorption parameters could be calculated. However, organic molecules having large size could not be intercalated because of steric hindrance. From the result on the effect of synthesis method of the AS-pillared LDH,the LDH adsorbent prepared by the reconstruction method was found to have a hydrophobic porous gallery which is due to the incorporation of AS aggregates such as micell.

为了合成一种疏水性吸附剂，以层状双氢氧化物（LDH）和阴离子表面活性剂（AS）为原料，采用热分解法制备了层状双氢氧化物Mg_Al_（OH）_2（CO_3）_ ·0.5H_2O，并将其与阴离子表面活性剂（AS）<0.58>结合，制备了<0.28>层状双氢氧化物<0.14>Mg_Al_ *_ O<0.67><0.33><0.17>（理论公式），在25 ℃下进行。发现煅烧产物高度吸附月桂酸酯，从水溶液中分离十二烷基硫酸根或十二烷基苯磺酸根离子，（重建法），得到了AS在廊道中的吸附等温线。因此，在高AS浓度下制备的AS柱撑LDHs具有较大的孔道高度（d = <003>31- 38），且具有疏水孔道空间，对苯甲醇、正戊醇和芳樟醇等不带电荷的有机物具有较强的吸附能力。吸附实验后LDH的结构没有发生变化。Freundlich吸附等温线可用于所有情况下，吸附参数可以计算。然而，尺寸较大的有机分子由于空间位阻而无法插层。从AS柱撑LDH的合成方法的影响的结果，发现通过重构方法制备的LDH吸附剂具有疏水性的多孔廊道，这是由于AS聚集体如胶束的掺入。