Surface properties of fluorinated oxetane polyol modified polyurethane block copolymers

Kim, Yu Seung; Lee, Jae‐Suk; Ji, Qing; McGrath, James E.

doi:10.1016/s0032-3861(02)00458-5

Cited by 122 publications

(82 citation statements)

References 26 publications

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“…[22][23][24] Other works 6 have favored the conclusion that hard blocks of polyurethanes are more biostable than soft segments. The well ordered bilayered surface structure (i.e., top fluorocarbon tails-dominated and underneath hard segments-dominated layers) of FPCUs may further improve the biostability of this kind of polymer.…”

Section: Remarks and Future Workmentioning

confidence: 99%

“…Considering the low surface energy, high chemical stability, and the good biocompatibility of fluoropolymers, [22][23][24] this fluorocarbon-covered surface could improve the biostability of the polymer. Tang and Santerre et al 25,26 have investigated the fluorocarbon chain end-capped poly(ether urethane)s used as surface modifying macromolecules (SMMs) to the base polyurethanes.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and characterization of fluorocarbon chain end‐capped poly(carbonate urethane)s as biomaterials: A novel bilayered surface structure

Xie

Tan

et al. 2007

J Biomedical Materials Res

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Poly(carbonate urethane)s (PCUs) are usually considered as biostable elastomers for long-term implantation. However, their hydrolytic stability is still questionable. The biodegradation appears to be initiated by oxidative and hydrolytic substances released by inflammatory cells. Therefore, the biostability of polyurethane might be improved with control of surface structure to reduce inflammatory response. A new type of PCUs end-capped with perfluoro chains was synthesized to explore a new avenue. A fluorinated alcohol, 2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-pentadecafluoro-1-octanol (PDFOL), was end-capped to the backbones of PCUs by reaction of the --OH in PDFOL with the --NCO end groups in PCU backbones. Contact angle measurement, X-ray photoelectron spectroscopy, atomic force microscopy, and attenuated total reflectance-Fourier transform infrared spectroscopy were used to examine their surface structure and properties. Elemental analysis, gel permeation chromatography, differential scanning calorimetry, and tensile testing were used to assess bulk chemistry and properties. The fluorocarbon end-capped poly (carbonate urethane)s (FPCUs) maintained the high mechanical properties (about 40 MPa tensile strength) and typical microphase separation structure of polyurethane elastomers. Results from surface analyses revealed the presence of a double-layered structure at the surfaces of the FPCUs. The first one was composed of fluorocarbon tails rising up on the uppermost layer and the second one made up of hard-segments. This novel bilayered surface structure could protect the weak carbonate linkages in soft segments, and consequently, may potentially increase the biostability of this kind of polyurethanes.

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Section: Remarks and Future Workmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of fluorocarbon chain end‐capped poly(carbonate urethane)s as biomaterials: A novel bilayered surface structure

Xie

Tan

et al. 2007

J Biomedical Materials Res

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“…Previous studies have reported high abrasion resistance for coatings that have low friction resistance. The studies by McGrath et al [32] also show decreases in friction resistance with the increasing fluorine content in the polymeric coatings. Thermal properties of the hybrid films were evaluated by TGA and DSC analyses.…”

Section: Resultsmentioning

confidence: 89%

Investigation of Coating Performance of UV-Curable Hybrid Polymers Containing 1H,1H,2H,2H-Perfluorooctyltriethoxysilane Coated on Aluminum Substrates

Çakır

2017

Coatings

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This study describes preparation and characterization of fluorine-containing organicinorganic hybrid coatings. The organic part consists of bisphenol-A glycerolate (1 glycerol/phenol) diacrylate resin and 1,6-hexanediol diacrylate reactive diluent. The inorganically rich part comprises trimethoxysilane-terminated urethane, 1H,1H,2H,2H-perfluorooctyltriethoxysilane, 3-(trimethoxysilyl) propyl methacrylate and sol-gel precursors that are products of hydrolysis and condensation reactions. Bisphenol-A glycerolate (1 glycerol/phenol) diacrylate resin was added to the inorganic part in predetermined amounts. The resultant mixture was utilized in the preparation of free films as well as coatings on aluminum substrates. Thermal and mechanical tests such as DSC, thermo-gravimetric analysis (TGA), and tensile and shore D hardness tests were performed on free films. Water contact angle, gloss, Taber abrasion test, cross-cut and tubular impact tests were conducted on the coated samples. SEM examination and EDS analysis was performed on the fractured surfaces of free films. The hybrid coatings on the aluminum sheets gave rise to properties such as moderately glossed surface; low wear rate and hydrophobicity. Tensile strength of free films increased with up to 10% inorganic content in the hybrid structure and this increase was approximately three times that of the control sample. As expected; the % strain value decreased by 17.3 with the increase in inorganic content and elastic modulus values increased by a factor of approximately 6. Resistance to ketone-based solvents was proven and an increase in hardness was observed as the ratio of the inorganic part increased. Samples which contain 10% sol-gel content were observed to provide optimal properties.

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“…These imaging conditions correspond to moderate tapping according to Magonov et al 18 Under these moderate force tapping conditions, phase data are sensitive to local stiffness differences of domains in the top several nanometers from the uppermost surface. 19 …”

Section: Afm Measurementmentioning

confidence: 99%

Comparison of two approaches to grafting hydrophilic polymer chains onto polysulfone films

Tian

Zhong

Sun

et al. 2006

J of Applied Polymer Sci

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To reduce the surface protein adsorption of polysulfone (PSf) film, we improved the hydrophilicity of this film by photochemical grafting of methoxypoly (ethylene glycol) (MPEG) derivatives on its surface. Grafting was achieved with both the simultaneous method and the sequential method. Surface analysis of the grafted film by X-ray photoelectron spectroscopy (XPS) revealed that the PEG chains had successfully grafted onto the surface of the film. The grafting efficiencies by simultaneous and sequential methods were 20.8% and 10.2%, respectively. With an atomic force microscope (AFM), the surface topography of PEG-grafted films by these two methods was compared. Static water contact angle measurement indicated that the surface hydrophilicity of the film had been improved. Protein adsorption measurement showed that the surface protein adsorption of the modified film was significantly reduced compared with that of the unmodified PSf film.

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Surface properties of fluorinated oxetane polyol modified polyurethane block copolymers

Cited by 122 publications

References 26 publications

Synthesis and characterization of fluorocarbon chain end‐capped poly(carbonate urethane)s as biomaterials: A novel bilayered surface structure

Synthesis and characterization of fluorocarbon chain end‐capped poly(carbonate urethane)s as biomaterials: A novel bilayered surface structure

Investigation of Coating Performance of UV-Curable Hybrid Polymers Containing 1H,1H,2H,2H-Perfluorooctyltriethoxysilane Coated on Aluminum Substrates

Comparison of two approaches to grafting hydrophilic polymer chains onto polysulfone films

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