Comparative study of the porosity induced by CTAB and Tween as silica templates
In this study doped-silicon polymers were synthesized using the non-ionic surfactant Tween 80 as template. The obtained material was compared with silicates doped with the cationic surfactant CTAB. Both materials were synthesized by sol-gel process with tetraethoxysilane (TEOS) as silicon source. In...
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paper:paper_09284931_v27_n1_p75_Cardinal2023-06-08T15:52:17Z Comparative study of the porosity induced by CTAB and Tween as silica templates Bernik, Delia Leticia AFM Mesostructured silica Sol-gel Surfactant Tween 80 Atomic force microscopy Biomaterials Crack initiation Encapsulation Mesoporous materials Polymerization Polymers Porosity Sol-gels Surface active agents X ray diffraction Bioactivity Encapsulation devices Mechanical resistance Silica In this study doped-silicon polymers were synthesized using the non-ionic surfactant Tween 80 as template. The obtained material was compared with silicates doped with the cationic surfactant CTAB. Both materials were synthesized by sol-gel process with tetraethoxysilane (TEOS) as silicon source. In the synthesis procedure reported herein the main difference to previous reports is that the obtained solids were dried smoothly at 55 °C avoiding surfactant calcination. The aim of this work is to obtain new biomaterials appropriate to be used for encapsulation devices in which the surfactant kept within the silica network has two roles: (1) to improve the mechanical resistance in drying-swelling processes preventing crack formation, (2) to hold and protect the encapsulated molecules keeping intact their bioactivity during TEOS polymerization. Structural features such as pore size and surface topology were studied by means of N2 adsorption, X-ray diffraction and AFM microscopy. The influence of surfactant net charge and molecular shape on the materials obtained is discussed. © 2006 Elsevier B.V. All rights reserved. Fil:Bernik, D.L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2007 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09284931_v27_n1_p75_Cardinal http://hdl.handle.net/20.500.12110/paper_09284931_v27_n1_p75_Cardinal |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
AFM Mesostructured silica Sol-gel Surfactant Tween 80 Atomic force microscopy Biomaterials Crack initiation Encapsulation Mesoporous materials Polymerization Polymers Porosity Sol-gels Surface active agents X ray diffraction Bioactivity Encapsulation devices Mechanical resistance Silica |
| spellingShingle |
AFM Mesostructured silica Sol-gel Surfactant Tween 80 Atomic force microscopy Biomaterials Crack initiation Encapsulation Mesoporous materials Polymerization Polymers Porosity Sol-gels Surface active agents X ray diffraction Bioactivity Encapsulation devices Mechanical resistance Silica Bernik, Delia Leticia Comparative study of the porosity induced by CTAB and Tween as silica templates |
| topic_facet |
AFM Mesostructured silica Sol-gel Surfactant Tween 80 Atomic force microscopy Biomaterials Crack initiation Encapsulation Mesoporous materials Polymerization Polymers Porosity Sol-gels Surface active agents X ray diffraction Bioactivity Encapsulation devices Mechanical resistance Silica |
| description |
In this study doped-silicon polymers were synthesized using the non-ionic surfactant Tween 80 as template. The obtained material was compared with silicates doped with the cationic surfactant CTAB. Both materials were synthesized by sol-gel process with tetraethoxysilane (TEOS) as silicon source. In the synthesis procedure reported herein the main difference to previous reports is that the obtained solids were dried smoothly at 55 °C avoiding surfactant calcination. The aim of this work is to obtain new biomaterials appropriate to be used for encapsulation devices in which the surfactant kept within the silica network has two roles: (1) to improve the mechanical resistance in drying-swelling processes preventing crack formation, (2) to hold and protect the encapsulated molecules keeping intact their bioactivity during TEOS polymerization. Structural features such as pore size and surface topology were studied by means of N2 adsorption, X-ray diffraction and AFM microscopy. The influence of surfactant net charge and molecular shape on the materials obtained is discussed. © 2006 Elsevier B.V. All rights reserved. |
| author |
Bernik, Delia Leticia |
| author_facet |
Bernik, Delia Leticia |
| author_sort |
Bernik, Delia Leticia |
| title |
Comparative study of the porosity induced by CTAB and Tween as silica templates |
| title_short |
Comparative study of the porosity induced by CTAB and Tween as silica templates |
| title_full |
Comparative study of the porosity induced by CTAB and Tween as silica templates |
| title_fullStr |
Comparative study of the porosity induced by CTAB and Tween as silica templates |
| title_full_unstemmed |
Comparative study of the porosity induced by CTAB and Tween as silica templates |
| title_sort |
comparative study of the porosity induced by ctab and tween as silica templates |
| publishDate |
2007 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09284931_v27_n1_p75_Cardinal http://hdl.handle.net/20.500.12110/paper_09284931_v27_n1_p75_Cardinal |
| work_keys_str_mv |
AT bernikdelialeticia comparativestudyoftheporosityinducedbyctabandtweenassilicatemplates |
| _version_ |
1768544602510327808 |