カチオン/アニオン界面活性剤混合系を利用したチタニア/界面活性剤複合粒子の調製とナノ構造制御

H. Sakai, Hiroki Kohno, Hideki Hagiwara, T. Ogura, H. Shibata, K. Sakai, T. Ohkubo, M. Abe
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Abstract

Titania/surfactant composite particles with nanoscale ordered structure have been prepared by hydrolysis and condensation reactions of titanium oxysulfate in the presence of molecular assemblies formed at aqueous mixtures of cationic and anionic surfactants as structure-directing agents. When cetyltrimethylammonium bromide (CTAB) and sodium octylsulfate (SOS) were used as cationic and anionic surfactants, respectively, particles with hexagonal type ordered nanostructure were obtained at CTAB-rich compositions and their repetition unit increased with increasing SOS content, while the hexagonal structure changed to lamellar structure at a certain SOS content and the repetition unit decreased above this content. These results showed that precise control of geometry and size of the nanoscale-ordered structure is possible by manipulation of the compositions of cationic CTAB and anionic SOS.
利用阳离子/阴离子表面活性剂混合体系的钛离子/表面活性剂复合粒子的制备和纳米结构控制
以正阴离子表面活性剂为结构导向剂,在水相混合物中形成分子组合,以硫酸氧钛为原料,通过水解缩合反应制备了纳米级有序结构的二氧化钛/表面活性剂复合颗粒。以十六烷基三甲基溴化铵(CTAB)和辛基硫酸钠(SOS)分别作为阳离子和阴离子表面活性剂时,在CTAB含量丰富的情况下,得到具有六边形有序纳米结构的颗粒,其重复单元随着SOS含量的增加而增加,而在一定的SOS含量下,六边形结构变为片层结构,重复单元在此含量以上减少。这些结果表明,通过控制阳离子CTAB和阴离子SOS的组成,可以精确控制纳米级有序结构的几何形状和尺寸。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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