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Microporous Semicrystalline Silica Materials

Published online by Cambridge University Press:  31 January 2011

Man Park ,
Sridhar Komarneni ,
W. T. Lim ,
N. H. Heo  and
J. Choi
Man Park
Affiliation:
Materials Research Laboratory, The Pennsylvania State University, University Park, Pennsylvania 16802
Sridhar Komarneni*
Affiliation:
Materials Research Laboratory, The Pennsylvania State University, University Park, Pennsylvania 16802
W. T. Lim
Affiliation:
Departments of Industrial Chemistry and Agricultural Chemistry, Kyungpook National University, Teagu, Korea 701–702
N. H. Heo
Affiliation:
Departments of Industrial Chemistry and Agricultural Chemistry, Kyungpook National University, Teagu, Korea 701–702
J. Choi
Affiliation:
Departments of Industrial Chemistry and Agricultural Chemistry, Kyungpook National University, Teagu, Korea 701–702
*
a)Address all correspondence to this author. Also with the Department of Agronomy.
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Abstract

A new family of microporous semicrystalline silica materials (MSSMs) were developed at room temperature from acidic mixtures of alkyl-substituted silane and tetramethylalkoxysilane. Hydrolyzed alkyl-substituted silica precursors, having hydrophilic silanol groups and hydrophobic alkyl groups, presumably act not only as templates but also as sol stabilizers for continuous pore engineering of silica materials in the micropore region. Depending on the substituted alkyl (SUA) groups in initial sols, MSSMs have distinct broad x-ray diffraction peaks in low 2θ range of 2° to 12°, distinguishable thermal behavior of SUA groups, highly flexible processability, and discrete micropore size with good thermal stability of micropores after the removal of SUA groups. These designer microporous silicas are expected to be useful for molecular sieving applications.

Type
Rapid Communications
Information
Journal of Materials Research , Volume 15 , Issue 7 , July 2000 , pp. 1437 - 1440
Copyright
Copyright © Materials Research Society 2000

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References

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