Size-Controllable Synthesis of Worm-Like SiO₂ Microspheres Using Dodecylamine as Direct Agent in Ethanol/Water Solvent System

Abstract:

Size-controllable synthesis of worm-like microporous monodispersed SiO₂ microspheres using dodecylamine (DDA) as direct agent in ethanol-water solvent system was firstly developed by varying the proportion of reactants. The products were characterized with scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), small angle X-ray diffraction (SAXRD) and nitrogen adsorption. The results showed that the SiO₂ microspheres with size of 50nm~1um could be prepared by varying the molar ratio of water/ethanol when the molar ratio of (DDA)/tetraethyl orthosilicate (TEOS) is 0.4 and the concentration of TEOS varied from 0.138 to 0.248mol/L. This method is simple and convenient, the prepared SiO₂ microspheres are monodispersed and uniform, the worm-like pore size is about 1.4nm. The size controllable silica microspheres could be used as an excellent additional medium to alter rheological behavior of fluid after surface modification..

• Periodical: Applied Mechanics and Materials (Volumes 448-453)
• Pages: 154-159
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.448-453.154
• Online since: October 2013
• Authors: Xue Ling Zhang, Wei Yao Zhu, Meng Jing Cao, Qiang Cai*, Xiao Feng Wang, Yu Lou
• Keywords: Dodecylamine, Monodispersity, Size-Controllable, Worm-Like Porous SiO₂ Microspheres

References

[1] P.T. Tanev and T. Pinnavaia, Science, 267(1995) 865-867.

[2] K. Kosuge and P. Singh, Micropor. Mesopor. Mater., 44(2001) 439-145.

[3] G. Büchel, M. Grün and K. Unger, Supramol. Sci., 5(1998) 253-259.

[4] R. Nooney, A. Ostafin and D. Thirunavaukkarasu et al, Chem. Mater., 14(2002) 4721-4728.

[5] R. Thomas and T. Pinnavaia, Chem. Mater., 13(2001) 87-93.

[6] J. Yu, L. Zhao and B. Cheng, Journal of Solid State Chemistry, 179(2006) 226-232.

[7] Z. Li, J. Yu and C. Yu, et al, J. Non-crystal. Solids, 351(2005) 3593-3599.

[8] J. Q. Qiu, Q. Cai and H. D. Li, et al, Journal of Inorganic Material 21(2006) 558-564 (in Chinese).

[9] W. Zhang, T. Pinnavaia and R. Thomas, Chem. Mater., 9(1997) 2491-2498.

[10] Y. Shiratori, H. Saito and M. Higuchi, et al: J. Ceram. Soc. Jpn., 110(2002) 304.

[11] Y. Miyake, M. Yosuke and H. Azechi, et al: Ind. Eng. Chem. Res., 48(2009) 938-943.

[12] Q. Huo, D. Margolese and G. Stucky, et al: 1994. Chem. Mater., 6(1994) 1176-1191.

[13] T.R. Pauly, Y. Liu and T.J. Pinnavaia, et al: J. Am. Chem. Soc., 121(1999) 8835-8842.

[14] S. Brunauer, L.S. Deming and W.E. Deming, Teller E. J. Am. Chem. Soc., 62(1940) 723.

[15] R. R. Xu and W.Q. Pang: Molecular Sieve and Porous Materials Chemistry. (Science press, China, 2004).