Porosity in hexylene-bridged polysilsesquioxanes. Effects of monomer concentration

Brigitta M. Baugher; Douglas A. Loy; S. Prabakar; Roger A. Assink; Kenneth J. Shea; Henry Oviatt

Porosity in hexylene-bridged polysilsesquioxanes. Effects of monomer concentration

Brigitta M. Baugher, Douglas A. Loy, S. Prabakar, Roger A. Assink, Kenneth J. Shea, Henry Oviatt

Research output: Contribution to journal › Conference article › peer-review

Abstract

Hexylene-bridged polysilsesquioxanes can be prepared as mesoporous or non-porous xerogels simply by switching from basic to acidic polymerization conditions. In this study, we looked at the effect of monomer concentration on porosity of hexylene-bridged xerogels prepared under acidic and basic conditions. 1, 6-Hexylene-bridged polysilsesquioxanes were prepared by sol-gel polymerizations of 1, 6-bis(triethoxysilyl)hexane 1 with concentrations between 0.1 to 1.2 M in ethanol. Gelation times ranged from seconds for 1.2 M concentration to months for 0.2 M. The gels were processed into xerogels by an aqueous work-up and the dry gels characterized by scanning electron microscopy (SEM), solid state ¹³C and ²⁹Si CP MAS NMR spectroscopy, and gas sorption porosimetry.

Original language	English (US)
Pages (from-to)	253-259
Number of pages	7
Journal	Materials Research Society Symposium - Proceedings
Volume	371
State	Published - 1995
Event	Proceedings of the 1994 MRS Fall Meeting - Boston, MA, USA Duration: Nov 28 1994 → Nov 30 1994

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

Cite this

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title = "Porosity in hexylene-bridged polysilsesquioxanes. Effects of monomer concentration",

abstract = "Hexylene-bridged polysilsesquioxanes can be prepared as mesoporous or non-porous xerogels simply by switching from basic to acidic polymerization conditions. In this study, we looked at the effect of monomer concentration on porosity of hexylene-bridged xerogels prepared under acidic and basic conditions. 1, 6-Hexylene-bridged polysilsesquioxanes were prepared by sol-gel polymerizations of 1, 6-bis(triethoxysilyl)hexane 1 with concentrations between 0.1 to 1.2 M in ethanol. Gelation times ranged from seconds for 1.2 M concentration to months for 0.2 M. The gels were processed into xerogels by an aqueous work-up and the dry gels characterized by scanning electron microscopy (SEM), solid state 13C and 29Si CP MAS NMR spectroscopy, and gas sorption porosimetry.",

author = "Baugher, {Brigitta M.} and Loy, {Douglas A.} and S. Prabakar and Assink, {Roger A.} and Shea, {Kenneth J.} and Henry Oviatt",

year = "1995",

language = "English (US)",

volume = "371",

pages = "253--259",

journal = "Materials Research Society Symposium - Proceedings",

issn = "0272-9172",

publisher = "Materials Research Society",

note = "Proceedings of the 1994 MRS Fall Meeting ; Conference date: 28-11-1994 Through 30-11-1994",

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TY - JOUR

T1 - Porosity in hexylene-bridged polysilsesquioxanes. Effects of monomer concentration

AU - Baugher, Brigitta M.

AU - Loy, Douglas A.

AU - Prabakar, S.

AU - Assink, Roger A.

AU - Shea, Kenneth J.

AU - Oviatt, Henry

PY - 1995

Y1 - 1995

N2 - Hexylene-bridged polysilsesquioxanes can be prepared as mesoporous or non-porous xerogels simply by switching from basic to acidic polymerization conditions. In this study, we looked at the effect of monomer concentration on porosity of hexylene-bridged xerogels prepared under acidic and basic conditions. 1, 6-Hexylene-bridged polysilsesquioxanes were prepared by sol-gel polymerizations of 1, 6-bis(triethoxysilyl)hexane 1 with concentrations between 0.1 to 1.2 M in ethanol. Gelation times ranged from seconds for 1.2 M concentration to months for 0.2 M. The gels were processed into xerogels by an aqueous work-up and the dry gels characterized by scanning electron microscopy (SEM), solid state 13C and 29Si CP MAS NMR spectroscopy, and gas sorption porosimetry.

AB - Hexylene-bridged polysilsesquioxanes can be prepared as mesoporous or non-porous xerogels simply by switching from basic to acidic polymerization conditions. In this study, we looked at the effect of monomer concentration on porosity of hexylene-bridged xerogels prepared under acidic and basic conditions. 1, 6-Hexylene-bridged polysilsesquioxanes were prepared by sol-gel polymerizations of 1, 6-bis(triethoxysilyl)hexane 1 with concentrations between 0.1 to 1.2 M in ethanol. Gelation times ranged from seconds for 1.2 M concentration to months for 0.2 M. The gels were processed into xerogels by an aqueous work-up and the dry gels characterized by scanning electron microscopy (SEM), solid state 13C and 29Si CP MAS NMR spectroscopy, and gas sorption porosimetry.

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M3 - Conference article

SN - 0272-9172

VL - 371

SP - 253

EP - 259

JO - Materials Research Society Symposium - Proceedings

JF - Materials Research Society Symposium - Proceedings

T2 - Proceedings of the 1994 MRS Fall Meeting

Y2 - 28 November 1994 through 30 November 1994

ER -

Porosity in hexylene-bridged polysilsesquioxanes. Effects of monomer concentration

Abstract

ASJC Scopus subject areas

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