Collapse of porosity during drying of alkylene-bridged polysilsesquioxane gels. Influence of the bridging group length

Douglas A Loy, James H. Small, Kimberly A. DeFriend, Kennard V. Wilson, Mckenzie Minke, Brigitta M. Baugher, Colleen R. Baugher, Duane A. Schneider, Kenneth J. Shea

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

The introduction of organic substituants into sol-gel materials can often result in networks that collapse during drying to afford non-porous xerogels. This can prove useful if non-porous coatings or membranes are the ultimate objectives. Collapse of porosity is also manifested in bridged polysilsesquioxanes with flexible bridging groups. Alkylene-bridged polysilsesquioxanes are hybrid xerogels whose organic bridging group is an integral constituent of the network polymer that can be systematically varied to probe the influence of its length on the xerogels' porosity and morphology. Our previous studies have shown that hexylene-bridged polysilsesquioxane xerogels prepared from 1,6-bis(triethoxysilyl)hexane under acidic conditions are nonporous while the pentylene-bridged polysilsesquioxanes prepared under the same conditions are porous. We also discovered that the more reactive 1,6-bis(trimethoxysilyl)hexane monomer could polymerize under acidic conditions to afford porous xerogels. Here, we have extended our study of bis(trimethoxysilyl)alkanes to include the heptylene (C7), octylene (C8), nonylene(C9) and decylene (C10) bridges so as to ascertain at what bridging group length the porosity collapses. The morphology of the resulting xerogels was characterized by nitrogen sorption porosimetry and electron microscopy. Solid state NMR was used to structurally characterize the materials.

Original languageEnglish (US)
Title of host publicationMaterials Research Society Symposium Proceedings
EditorsC. Sanchez, U. Schubert, R.M. Laine, Y. Chujo
Pages165-170
Number of pages6
Volume847
StatePublished - 2005
Externally publishedYes
Event2004 Materials Research Society Fall Meeting - Boston, MA, United States
Duration: Nov 29 2004Dec 2 2004

Other

Other2004 Materials Research Society Fall Meeting
CountryUnited States
CityBoston, MA
Period11/29/0412/2/04

Fingerprint

Xerogels
Drying
Gels
Porosity
Hexanes
Hexane
Alkanes
Paraffins
Electron microscopy
Sol-gels
polysilsesquioxane
Sorption
Polymers
Nitrogen
Monomers
Nuclear magnetic resonance
Membranes
Coatings

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

Cite this

Loy, D. A., Small, J. H., DeFriend, K. A., Wilson, K. V., Minke, M., Baugher, B. M., ... Shea, K. J. (2005). Collapse of porosity during drying of alkylene-bridged polysilsesquioxane gels. Influence of the bridging group length. In C. Sanchez, U. Schubert, R. M. Laine, & Y. Chujo (Eds.), Materials Research Society Symposium Proceedings (Vol. 847, pp. 165-170). [EE9.9]

Collapse of porosity during drying of alkylene-bridged polysilsesquioxane gels. Influence of the bridging group length. / Loy, Douglas A; Small, James H.; DeFriend, Kimberly A.; Wilson, Kennard V.; Minke, Mckenzie; Baugher, Brigitta M.; Baugher, Colleen R.; Schneider, Duane A.; Shea, Kenneth J.

Materials Research Society Symposium Proceedings. ed. / C. Sanchez; U. Schubert; R.M. Laine; Y. Chujo. Vol. 847 2005. p. 165-170 EE9.9.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Loy, DA, Small, JH, DeFriend, KA, Wilson, KV, Minke, M, Baugher, BM, Baugher, CR, Schneider, DA & Shea, KJ 2005, Collapse of porosity during drying of alkylene-bridged polysilsesquioxane gels. Influence of the bridging group length. in C Sanchez, U Schubert, RM Laine & Y Chujo (eds), Materials Research Society Symposium Proceedings. vol. 847, EE9.9, pp. 165-170, 2004 Materials Research Society Fall Meeting, Boston, MA, United States, 11/29/04.
Loy DA, Small JH, DeFriend KA, Wilson KV, Minke M, Baugher BM et al. Collapse of porosity during drying of alkylene-bridged polysilsesquioxane gels. Influence of the bridging group length. In Sanchez C, Schubert U, Laine RM, Chujo Y, editors, Materials Research Society Symposium Proceedings. Vol. 847. 2005. p. 165-170. EE9.9
Loy, Douglas A ; Small, James H. ; DeFriend, Kimberly A. ; Wilson, Kennard V. ; Minke, Mckenzie ; Baugher, Brigitta M. ; Baugher, Colleen R. ; Schneider, Duane A. ; Shea, Kenneth J. / Collapse of porosity during drying of alkylene-bridged polysilsesquioxane gels. Influence of the bridging group length. Materials Research Society Symposium Proceedings. editor / C. Sanchez ; U. Schubert ; R.M. Laine ; Y. Chujo. Vol. 847 2005. pp. 165-170
@inproceedings{dc780af5638b4d67bf6069d090294744,
title = "Collapse of porosity during drying of alkylene-bridged polysilsesquioxane gels. Influence of the bridging group length",
abstract = "The introduction of organic substituants into sol-gel materials can often result in networks that collapse during drying to afford non-porous xerogels. This can prove useful if non-porous coatings or membranes are the ultimate objectives. Collapse of porosity is also manifested in bridged polysilsesquioxanes with flexible bridging groups. Alkylene-bridged polysilsesquioxanes are hybrid xerogels whose organic bridging group is an integral constituent of the network polymer that can be systematically varied to probe the influence of its length on the xerogels' porosity and morphology. Our previous studies have shown that hexylene-bridged polysilsesquioxane xerogels prepared from 1,6-bis(triethoxysilyl)hexane under acidic conditions are nonporous while the pentylene-bridged polysilsesquioxanes prepared under the same conditions are porous. We also discovered that the more reactive 1,6-bis(trimethoxysilyl)hexane monomer could polymerize under acidic conditions to afford porous xerogels. Here, we have extended our study of bis(trimethoxysilyl)alkanes to include the heptylene (C7), octylene (C8), nonylene(C9) and decylene (C10) bridges so as to ascertain at what bridging group length the porosity collapses. The morphology of the resulting xerogels was characterized by nitrogen sorption porosimetry and electron microscopy. Solid state NMR was used to structurally characterize the materials.",
author = "Loy, {Douglas A} and Small, {James H.} and DeFriend, {Kimberly A.} and Wilson, {Kennard V.} and Mckenzie Minke and Baugher, {Brigitta M.} and Baugher, {Colleen R.} and Schneider, {Duane A.} and Shea, {Kenneth J.}",
year = "2005",
language = "English (US)",
volume = "847",
pages = "165--170",
editor = "C. Sanchez and U. Schubert and R.M. Laine and Y. Chujo",
booktitle = "Materials Research Society Symposium Proceedings",

}

TY - GEN

T1 - Collapse of porosity during drying of alkylene-bridged polysilsesquioxane gels. Influence of the bridging group length

AU - Loy, Douglas A

AU - Small, James H.

AU - DeFriend, Kimberly A.

AU - Wilson, Kennard V.

AU - Minke, Mckenzie

AU - Baugher, Brigitta M.

AU - Baugher, Colleen R.

AU - Schneider, Duane A.

AU - Shea, Kenneth J.

PY - 2005

Y1 - 2005

N2 - The introduction of organic substituants into sol-gel materials can often result in networks that collapse during drying to afford non-porous xerogels. This can prove useful if non-porous coatings or membranes are the ultimate objectives. Collapse of porosity is also manifested in bridged polysilsesquioxanes with flexible bridging groups. Alkylene-bridged polysilsesquioxanes are hybrid xerogels whose organic bridging group is an integral constituent of the network polymer that can be systematically varied to probe the influence of its length on the xerogels' porosity and morphology. Our previous studies have shown that hexylene-bridged polysilsesquioxane xerogels prepared from 1,6-bis(triethoxysilyl)hexane under acidic conditions are nonporous while the pentylene-bridged polysilsesquioxanes prepared under the same conditions are porous. We also discovered that the more reactive 1,6-bis(trimethoxysilyl)hexane monomer could polymerize under acidic conditions to afford porous xerogels. Here, we have extended our study of bis(trimethoxysilyl)alkanes to include the heptylene (C7), octylene (C8), nonylene(C9) and decylene (C10) bridges so as to ascertain at what bridging group length the porosity collapses. The morphology of the resulting xerogels was characterized by nitrogen sorption porosimetry and electron microscopy. Solid state NMR was used to structurally characterize the materials.

AB - The introduction of organic substituants into sol-gel materials can often result in networks that collapse during drying to afford non-porous xerogels. This can prove useful if non-porous coatings or membranes are the ultimate objectives. Collapse of porosity is also manifested in bridged polysilsesquioxanes with flexible bridging groups. Alkylene-bridged polysilsesquioxanes are hybrid xerogels whose organic bridging group is an integral constituent of the network polymer that can be systematically varied to probe the influence of its length on the xerogels' porosity and morphology. Our previous studies have shown that hexylene-bridged polysilsesquioxane xerogels prepared from 1,6-bis(triethoxysilyl)hexane under acidic conditions are nonporous while the pentylene-bridged polysilsesquioxanes prepared under the same conditions are porous. We also discovered that the more reactive 1,6-bis(trimethoxysilyl)hexane monomer could polymerize under acidic conditions to afford porous xerogels. Here, we have extended our study of bis(trimethoxysilyl)alkanes to include the heptylene (C7), octylene (C8), nonylene(C9) and decylene (C10) bridges so as to ascertain at what bridging group length the porosity collapses. The morphology of the resulting xerogels was characterized by nitrogen sorption porosimetry and electron microscopy. Solid state NMR was used to structurally characterize the materials.

UR - http://www.scopus.com/inward/record.url?scp=28844433679&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=28844433679&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:28844433679

VL - 847

SP - 165

EP - 170

BT - Materials Research Society Symposium Proceedings

A2 - Sanchez, C.

A2 - Schubert, U.

A2 - Laine, R.M.

A2 - Chujo, Y.

ER -