Trichlorosilane Chemisorption on Surface-Modified Poly(tetrafluoroethylene)

Bin Zhao; William J. Brittain; Erwin A. Vogler

doi:10.1021/ma9811526

Trichlorosilane Chemisorption on Surface-Modified Poly(tetrafluoroethylene)

Bin Zhao, William J. Brittain, Erwin A. Vogler

Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

21 Scopus citations

Abstract

Modification of poly(tetrafluoroethylene) (PTFE) by trichlorosilane chemisorption to hydroxyl-modified (PTFE-OH) and silicate-modified (PTFE/SiO₂) PTFE is reported. PTFE/SiO₂ was prepared by exposure of PTFE-OH to SiCl₄ vapor. XPS and contact angle analyses were consistent with the chemical composition of PTFE-OH and PTFE/SiO₂. Chemisorption of trichlorosilanes from solution produced layers on PTFE-OH and PTFE/SiO₂. The FTIR absorption intensity for these layers was consistent with monolayer formation. Monolayers with Br, CF₃, CH₃, CD₃, and CH=CH₂ terminal groups were prepared. Relative to deuterated hexadecyltrichlorosilane (DHTS) monolayers on PTFE-OH, higher contact angles were observed for DHTS monolayers on PTFE/SiO₂ under a greater variety of deposition conditions. Reflectance FTIR indicated that the monolayers formed on PTFE-OH and PTFE/SiO₂ exhibited crystalline-like order consistent with a well-ordered monolayer. Thermal annealing of the DHTS monolayers for several days at 125°C did not produce any significant changes in water contact angles.

Original language	English (US)
Pages (from-to)	796-800
Number of pages	5
Journal	Macromolecules
Volume	32
Issue number	3
DOIs	https://doi.org/10.1021/ma9811526
State	Published - Feb 9 1999

All Science Journal Classification (ASJC) codes

Organic Chemistry
Polymers and Plastics
Inorganic Chemistry
Materials Chemistry

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title = "Trichlorosilane Chemisorption on Surface-Modified Poly(tetrafluoroethylene)",

abstract = "Modification of poly(tetrafluoroethylene) (PTFE) by trichlorosilane chemisorption to hydroxyl-modified (PTFE-OH) and silicate-modified (PTFE/SiO2) PTFE is reported. PTFE/SiO2 was prepared by exposure of PTFE-OH to SiCl4 vapor. XPS and contact angle analyses were consistent with the chemical composition of PTFE-OH and PTFE/SiO2. Chemisorption of trichlorosilanes from solution produced layers on PTFE-OH and PTFE/SiO2. The FTIR absorption intensity for these layers was consistent with monolayer formation. Monolayers with Br, CF3, CH3, CD3, and CH=CH2 terminal groups were prepared. Relative to deuterated hexadecyltrichlorosilane (DHTS) monolayers on PTFE-OH, higher contact angles were observed for DHTS monolayers on PTFE/SiO2 under a greater variety of deposition conditions. Reflectance FTIR indicated that the monolayers formed on PTFE-OH and PTFE/SiO2 exhibited crystalline-like order consistent with a well-ordered monolayer. Thermal annealing of the DHTS monolayers for several days at 125°C did not produce any significant changes in water contact angles.",

author = "Bin Zhao and Brittain, {William J.} and Vogler, {Erwin A.}",

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AU - Zhao, Bin

AU - Brittain, William J.

AU - Vogler, Erwin A.

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Y1 - 1999/2/9

N2 - Modification of poly(tetrafluoroethylene) (PTFE) by trichlorosilane chemisorption to hydroxyl-modified (PTFE-OH) and silicate-modified (PTFE/SiO2) PTFE is reported. PTFE/SiO2 was prepared by exposure of PTFE-OH to SiCl4 vapor. XPS and contact angle analyses were consistent with the chemical composition of PTFE-OH and PTFE/SiO2. Chemisorption of trichlorosilanes from solution produced layers on PTFE-OH and PTFE/SiO2. The FTIR absorption intensity for these layers was consistent with monolayer formation. Monolayers with Br, CF3, CH3, CD3, and CH=CH2 terminal groups were prepared. Relative to deuterated hexadecyltrichlorosilane (DHTS) monolayers on PTFE-OH, higher contact angles were observed for DHTS monolayers on PTFE/SiO2 under a greater variety of deposition conditions. Reflectance FTIR indicated that the monolayers formed on PTFE-OH and PTFE/SiO2 exhibited crystalline-like order consistent with a well-ordered monolayer. Thermal annealing of the DHTS monolayers for several days at 125°C did not produce any significant changes in water contact angles.

AB - Modification of poly(tetrafluoroethylene) (PTFE) by trichlorosilane chemisorption to hydroxyl-modified (PTFE-OH) and silicate-modified (PTFE/SiO2) PTFE is reported. PTFE/SiO2 was prepared by exposure of PTFE-OH to SiCl4 vapor. XPS and contact angle analyses were consistent with the chemical composition of PTFE-OH and PTFE/SiO2. Chemisorption of trichlorosilanes from solution produced layers on PTFE-OH and PTFE/SiO2. The FTIR absorption intensity for these layers was consistent with monolayer formation. Monolayers with Br, CF3, CH3, CD3, and CH=CH2 terminal groups were prepared. Relative to deuterated hexadecyltrichlorosilane (DHTS) monolayers on PTFE-OH, higher contact angles were observed for DHTS monolayers on PTFE/SiO2 under a greater variety of deposition conditions. Reflectance FTIR indicated that the monolayers formed on PTFE-OH and PTFE/SiO2 exhibited crystalline-like order consistent with a well-ordered monolayer. Thermal annealing of the DHTS monolayers for several days at 125°C did not produce any significant changes in water contact angles.

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Trichlorosilane Chemisorption on Surface-Modified Poly(tetrafluoroethylene)

Abstract

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