Effect of carboxylic acid functionalized graphene on physical-chemical and biological performances of polysulfone porous films. (1st June 2016)

• Record Type: Journal Article
• Authors: Ionita, Mariana; Crica, Livia Elena; Vasile, Eugenia; Dinescu, Sorina; Pandele, Madalina Andreea; Costache, Marieta; Haugen, Håvard Jostein; Iovu, Horia
• Is Part Of: Polymer. Volume 92(2016)
• Page Start: 1
• Page End: 12
• Publication Date: 2016-06-01
• Subjects: Carboxylic acid -- Graphene -- Polysulfone -- Porous films -- Transmission electron microscopy -- Cytoskeleton; Polymers -- Periodicals; Polymerization -- Periodicals; Polymères -- Périodiques; Polymérisation -- Périodiques; 547.7
• DOI: 10.1016/j.polymer.2016.03.040
• Languages: English
• ISSNs: 0032-3861

Abstract

Abstract: This study highlights the preparation and characterization of new polysulfone/carboxylic acid functionalized graphene (PSF/G-COOH) porous composite films. Materials structure, morphology, topography, hydrophilic–hydrophobic character, as well as thermal, mechanical and biological behavior were thoroughly evaluated. Raman spectrometry, X-ray diffraction and transmission electron microscopy evidenced the formation of homogenous configurations, with well-dispersed G-COOH layers within the PSF matrix. Both film sides were found to develop larger pores in the presence of G-COOH, whereas changes of selective layer thickness and macrovoids shape were also observed. Profilometry emphasized a smoothing effect imposed by G-COOH on both surfaces, ∼50% reduction of surface roughness was computed for 2 wt.% G-COOH. No significant vary was noticed for water contact angle, whereas biocomposites thermal and mechanical stability were found to be positively related to G-COOH concentrations. Biocompatibility and cell cytoskeleton assessments revealed good biocompatibility and emphasized cells affinity for G-COOH rich areas. Graphical abstract: Highlights: Carboxyl graphene based composite films were prepared by wet phase-inversion. SEM and profilometry indicated the smoothing effect of G-COOH on both film sides. Tensile tests revealed a strengthening effect provided by carboxyl graphene. 2 wt.% carboxyl graphene was most favorable concentration for cells attachment.