Modification of the surface properties of polyimide films using polyhedral oligomeric silsesquioxane deposition and oxygen plasma exposure

Wohl, Christopher J.; Belcher, Marcus A.; Ghose, Subrata; Connell, John W.

doi:10.1016/j.apsusc.2009.05.030

Cited by 48 publications

(31 citation statements)

References 48 publications

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“…According to XPS standard spectra databases, theoretical composition and relative references, [38][39][40][41][42] the XPS spectra of the hybrid film was deconvoluted. The curve-fitting procedure including the addition of possible components, the area and positions of all components was carried out and then adjusted to obtain the best fit.…”

Section: Xps Analysismentioning

confidence: 99%

Atomic oxygen erosion resistance of titania–polyimide hybrid films derived from titanium tetrabutoxide and polyamic acid

Xiao¹,

Wang²,

Zhan³

2011

J of Applied Polymer Sci

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A series of polyimide/titania (PI/TiO 2 ) hybrid films have been successfully synthesized based on titanium tetrabutoxide (Ti(OEt) 4 ), 3,3 0 ,4,4 0 -bezonphenone tetracarboxylic dianhydride (BTDA), 4,4 0 -oxydianiline (ODA), and 1,3-bis(aminopropyl) tetramethyldisiloxane (APrTMOS) by a sol-gel process. The atomic oxygen (AO) exposure tests were carried out using a ground-based AO effects simulation facility. The chemical structure of PI/ TiO 2 films was characterized by Fourier transform-infrared (FT-IR) spectroscope before and after AO exposure. The glass transition temperature (T g ) and mechanical properties were examined by dynamic mechanical analysis (DMA) and universal mechanical testing machine, respectively. The tensile strength and elongation of the hybrid film decreased with the increase of TiO 2 content, whereas the T g increased with the increase of TiO 2 content. The effects of TiO 2 content on the morphology and structure evolvement of PI/TiO 2 hybrid films were also investigated using field emission scanning electron microscopy (FE-SEM) and X-ray photoelectron spectroscope (XPS), respectively. The results indicated that a TiO 2 -rich layer resulting from the Ti(OEt) 4 formed on the PI film after AO exposure, which decreased the mass loss rate and obviously improved the AO resistance of PI films.

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Section: Xps Analysismentioning

confidence: 99%

Atomic oxygen erosion resistance of titania–polyimide hybrid films derived from titanium tetrabutoxide and polyamic acid

Xiao¹,

Wang²,

Zhan³

2011

J of Applied Polymer Sci

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“…11 (a-b). In both systems dark points are observed, which represents the dispersion of POSS in PBZ-Cy-DDM and PBZ-Cy-DDE hybrid nanocomposites, which also suggests that POSS is uniformly dispersed within the matrix on the nanoscale level [38,39].…”

Section: Confocal Optical Microscopymentioning

confidence: 89%

Octakis(dimethylsiloxypropylglycidylether)silsesquioxane (OG-POSS) reinforced 1,1-bis(3-methyl-4-hydroxymethyl)cyclohexane based polybenzoxazine nanocomposites

et al. 2012

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Octakis(dimethylsiloxypropylglycidylether)silsesquioxane (OG-POSS) was used as a reinforcing agent to prepare polybenzoxazine nanocomposites. Benzoxazine was synthesized using 1,1-bis(3-methyl-4-hydroxyphenyl) cyclohexane, paraformaldehyde and two distinctive aromatic diamines, namely 4,4′-diaminodiphenylmethane (DDM) and 4,4′-diaminodiphenylether (DDE) through Mannich condensation. Polybenzoxazine-POSS hybrid nanocomposites were prepared by ring opening polymerization via thermal curing using benzoxazine precursors and OG-POSS (up to 10 wt %). Thermogravimetric analysis indicate that the nanocomposites display improved thermal stability. Morphological characteristic was studied by scanning electron microscopy. The dispersion of POSS in polybenzoxazine and nanostructure of the composites were confirmed by confocal optical microscopy (COM), transmission electron microscopy (TEM) and atomic force microscopic (AFM) analysis.

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“…Peaks at 1,245 cm −1 were assigned to O CO O vibrations from the long chain polymer backbone. The peak at 1,130 cm −1 could be assigned to POSS-containing siloxane bonding (Si O Si) [50][51][52][53][54]. Plasma-treated samples at 30 W had a similar spectrum as the untreated control with negligible variations in wavenumber.…”

Section: Surface Wettability and Energy Measurements Of Poss-pcu Filmsmentioning

confidence: 99%

Surface modification of POSS‐nanocomposite biomaterials using reactive oxygen plasma treatment for cardiovascular surgical implant applications

Solouk

Cousins

Mirzadeh

et al. 2011

Biotech and App Biochem

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In this study, central composite design (CCD) was used to develop predictive models to optimize operating conditions of plasma surface modification. It was concluded that out of the two process variables, power and duration of plasma exposure, the latter was significantly affecting the surface energy (γ(s) ), chemistry, and topography of polyhedral oligomeric silsesquioxane-poly(carbonate-urea)urethane (POSS-PCU) films. On the basis of experimental data, CCD was used to model the γ(s) using a quadratic modeling of the process variables to achieve optimum surface energy to improve the interaction between endothelial cells (ECs). It was found that optimal water θ for EC adhesion and retention, which was reported 55° from supporting literature (equivalent to γ(s) = 51 mN/m), was easily achievable using the following experimental conditions: (1) power output at 30 W for 75 Sec, (2) 90 W for 40 Sec, and (3) 90 W for 55 Sec in oxygen. In vitro cell culture and metabolic activity studies on optimized films [as in (1)] demonstrate increased adhesion, coverage, and growth of human umbilical vein endothelial cells that were confluent over a shorter time period (<24 H) than controls. Such materials enhanced the EC response and promoted endothelialization on optimized films, thus demonstrating their use as bypass graft materials.

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Modification of the surface properties of polyimide films using polyhedral oligomeric silsesquioxane deposition and oxygen plasma exposure

Cited by 48 publications

References 48 publications

Atomic oxygen erosion resistance of titania–polyimide hybrid films derived from titanium tetrabutoxide and polyamic acid

Atomic oxygen erosion resistance of titania–polyimide hybrid films derived from titanium tetrabutoxide and polyamic acid

Octakis(dimethylsiloxypropylglycidylether)silsesquioxane (OG-POSS) reinforced 1,1-bis(3-methyl-4-hydroxymethyl)cyclohexane based polybenzoxazine nanocomposites

Surface modification of POSS‐nanocomposite biomaterials using reactive oxygen plasma treatment for cardiovascular surgical implant applications

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