title: Titanium alloy surface coatings using poly(sodium styrene sulfonate) and poly(acrylic acid).
abstract: BACKGROUND
  Osseointegration of implant materials with surrounding tissues is crucial for their long-term success.
  
  
  OBJECTIVE
  The aim of the present study was to investigate the extent of physisorption of polymers on a titanium alloy (Ti6Al4V) surface. In addition, the water contact angles on the physisorbed coatings were measured to compare the hydrophilicity of the modified surfaces.
  
  
  METHODS
  Ti6Al4V disks (13-mm diameter) were prepared to evaluate polymer adsorption on the alloy surface. The surface hydrophilicity was evaluated by contact angle (Θ) measurement. Physisorption of polymers on the surface was evaluated quantitatively by a colorimetric method.
  
  
  RESULTS
  The largest contact angles were recorded on samples polished with silicon carbide papers of 1200 and 500 grit (Poli1200 and Poli500 samples: 97.3 ± 4.8 and 84.8 ± 11.0, respectively). Treatment of polished samples with Kroll solution remarkable reduced the contact angles to 46.8 ± 11.6 and 58.6 ± 11.5 for Poli500+Kroll and Poli1200+Kroll, respectively. Contact angles were further reduced in response to PolyNaSS and PAA treatment. Regardless of surface treatment, there was no significant difference in the contact angles on surfaces after SiC 500 and 1200 grit polishing.
  
  
  CONCLUSIONS
  Physisorbed polymer coatings (such as PAA) on the Ti6Al4V surface can reduce the contact angle and improve the hydrophilicity and wettability of the alloy surface. Moreover, physisorption is a simple technique that does not require any special equipment.
authors.affiliation: Department of Stomatology, The First Hospital of JiLin University, 71 XinMin Street, Changchun, JiLin Province, China.
authors.forename: Cong Xiao
authors.initials: CX
authors.lastname: Zhang
authors.affiliation: LBPS, CSPBAT, UMR CNRS 7244, Université Paris 13, 99 Avenue JB Clément, Villetaneuse, France.
authors.forename: Celine
authors.initials: C
authors.lastname: Falentin-Daudre
authors.affiliation: LBPS, CSPBAT, UMR CNRS 7244, Université Paris 13, 99 Avenue JB Clément, Villetaneuse, France.
authors.forename: Veronique
authors.initials: V
authors.lastname: Migonney
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry*; D000497:Alloys; D003764:Dental Materials; D057927:Hydrophobic and Hydrophilic Interactions; D008422:Materials Testing; D016348:Osseointegration; D011108:Polymers / Q000737:chemistry*; D013451:Sulfonic Acids / Q000737:chemistry*; D014025:Titanium / Q000737:chemistry*
chemical_list: D000180:Acrylic Resins; D000497:Alloys; D003764:Dental Materials; D011108:Polymers; D013451:Sulfonic Acids; C031462:titanium alloy (TiAl6V4); C006903:carbopol 940; D014025:Titanium; C077114:styrenesulfonic acid polymer
keywords: Physisorption; colorimetric method; polyacrylic acid; polystyrene sodium sulfonate