Formation of Lamellar Silica from Lyotropic Liquid Crystals of Dodecyl Benzene Sulfonic Acid |
| |
Authors: | Carlos Rodríguez Suraj Chandra Sharma |
| |
Institution: | 1. Facultad de Química, Departamento de Química Física , Universidad de Santiago de Compostela , Santiago de Compostela, Spain;2. Graduate School of Environment and Information Sciences, Yokohama National University , Hodogaya‐ku, Yokohama, Japan |
| |
Abstract: | The formation of lamellar mesostructured silica by a neutral route in dodecylbenzene sulfonic acid (DBSA)/aminoalkoxysilane/water systems was investigated by phase study and Small Angle X‐ray Scattering (SAXS). Initially, two lamellar lyotropic phases are found, one corresponding to the DBSA and other corresponding to the DBSA‐aminoalkoxysilane salt. With the hydrolysis and condensation of siloxane groups, the DBSA‐aminoalkoxysilane lyotropic phase disappears and lamellar silica is formed. The lyotropic phase does not act as a true template but as a source of amphiphilic molecules, hence synthesis takes place via a phase separation mechanism. This synthesis route provides an easy way to prepare amino functionalized lamellar silica. |
| |
Keywords: | Mesoporous silica small angle x-ray scattering surfactant phase behavior lamellar liquid crystal |
|
|