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Synthesis of Silica Particles for Textile Applications
Delfina B. Barros 1 , C. Pereira 1 , L. S. G. Fernandes 2 , P. B. Tavares 2 , A. Carneiro 3 , M. F.
R. Pereira 4 and C. Freire 1
1 REQUIMTE, Dep. Química e Bioquímica, Fac. Ciências, Univ. Porto, 4169-007 Porto.
2 Dep. Química e CQ-VR, Univ. Trás-os-Montes e Alto Douro, 5001-801 Vila Real.
3 Centro de Nanotecnologia e Materiais Técnicos, Funcionais e Inteligentes (CENTI), 4760-034
Vila Nova de Famalicão.
4 Laboratório de Catálise e Materiais (LCM), Laboratório Associado LSRE/LCM, Dep. Engenharia
Química, Fac. Engenharia, Univ. Porto, 4200-465 Porto.
Organosilica based materials with micro and nano dimensions have attracted much research
attention due to their potentialities in Nanoscience and Nanotechnology. Several methods have
been developed for the preparation of silica nanomaterials and their incorporation onto textiles,
to add novel functionalities such as hydro/oleophobicity and thermal insulation [1]. However,
such procedures are usually complicated and expensive due to the use of templates in the silica
synthesis and processes for their removal [2].
In the present work, a simple and low-cost method for the synthesis of silica particles by solgel
method without the use of templates is reported. The procedure involves two steps: acid
hydrolysis of phenyltrimethoxysilane followed by condensation in the presence of a base [3].
The effect of the hydrolysis time and the base type on the particles morphology and texture
was evaluated. The new silica materials were characterized by FTIR-ATR, SEM (Fig. 1), EDS,
TEM, powder X-ray diffraction, thermogravimetry and 13 C and 29 Si solid-state NMR.
Figure 1: SEM images of silica particles prepared with different bases: a) triisopropanolamine and b)
ammonia.
Acknowlegments: The authors wish to thank Evonik-Goldschmidt GmbH for providing the
organosilane compound. This work was partially funded by Projecto de Investigação Científica na Pré-
Graduação 2009, U.P. and Santander Totta, and by FCT and FEDER (Portugal), through project
PTDC/CTM/108820/2008.
References:
(a) (b)
[1] Mahltig, B., Haufe, H. and Bottcher, H. (2005), Functionalization of textiles by inorganic sol-gel
coatings, J. Mater. Chem, 15, 4385-4398.
[2] Zhang, T., Zhang, Q., Ge, J., Goebl, J., Sun, M., Yan,Y., Liu, Y., Chang, C., Guo, J. and Yin, Y.
(2009), A Self-Templated Route to Hollow Silica Microspheres, J. Phys. Chem. C., 113 (8), 3168-3175.
[3] Hah, H. J., Kim, J. S., Jeon, B. J., Koo, S. M., Lee, Y. E. (2003), Simple preparation of
monodisperse hollow silica particles without using templates, Chem. Commun., 1712–1713.
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