Biomimetic Synthesis of Nanoporous Silica Templated by Copolypeptide in the Organic Gel System

Abstract:

At neutral pH value and room temperature, nanoporous silica has been prepared through self-organization of synthetic block copolypeptide Poly(ethyl glycol)-b-poly(L-phenylalanine) (MPEG44–b-Phe7) and silicane in the organic gel system. In this system, π－π interaction between anilino-methyl triethoxy silicane and block copolypeptide MPEG44–b-Phe7 effectively controlled the growth of the silica precursors. SEM images show that the size of silica is relatively uniform with the length ranging from 20~50 μm and the diameter ranging from 2~5 μm. FT-IR spectra reveals that there exists nanoporous structure in the calcined sample. N2 adsorption-desorption isotherms are consistent with the results of FT-IR spectra and show a type-IV isotherm with H1-type hysteresis loop, which means the presence of uniform nanoporous structure. This sample has a BET surface area of 171 m2.g-1 and a pore volume of 0.55 cm3.g-1. The average pore size calculated by BJH method is 10 nm. Our results suggest a new biomimetic avenue for synthesis of nanoporous inorganic materials templated by the self-organization of copolypeptide .

• Periodical: Solid State Phenomena (Volumes 121-123)
• Pages: 897-900
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.121-123.897
• Online since: March 2007
• Authors: Y.P. Liu, Z.R. Shen, L.Y. Li, P.C. Sun, Zhong Yong Yuan, Tie Hong Chen, B.H. Li, D.T. Ding
• Keywords: Biomimetic Synthesis, Block Copolypeptide, Nanoporous Silica, Organic Gel System, p-p Interaction

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