title: Temperature-sensitivity and cell biocompatibility of freeze-dried nanocomposite hydrogels incorporated with biodegradable PHBV.
abstract: The structure, morphology, thermal behaviors and cytotoxicity of novel hydrogels, composed of poly(N-isopropylacrylamide)(PNIPAM) and biodegradable polyester poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) under nanoclay hectorite "Laponite XLG" severed as physical cross-linker, were characterized by X-ray diffraction, scanning electron microscopy, gravimetric method, differential scanning calorimetry, and cell culture experiments. It was found that, due to the introduction of hydrophobic PHBV, the homogeneity of interior pore in the pure PNIPAM nanocomposite hydrogel was disrupted, the transparency and swelling degree gradually decreased. Although the weight ratio between PHBV and NIPAM increased from 5 to 40 wt.%, the volume phase transition temperature (VPTTs) of hydrogel were not altered compared with the pure PNIPAM nanocomposite hydrogel. No matter what PHBV content, the PHBV/PNIPAM/Hectorite hydrogels always exhibit good stimuli-responsibility. In addition, human hepatoma cells(HepG2) adhesion and spreading on the surface of PHBV-based hydrogels was greatly improved than that of pure PNIPAM nanocomposite hydrogel at 37 °C due to the introduction of PHBV.
authors.affiliation: State Key Laboratory of Hollow Fiber Membrane Materials and Processes, School of Materials Science and Engineering, Tianjin Polytechnic University, No.399 Binshui West Road,Tianjin, 300387, People's Republic of China. zqs8011@163.com
authors.forename: Qingsong
authors.initials: Q
authors.lastname: Zhang
authors.forename: Li
authors.initials: L
authors.lastname: Chen
authors.forename: Youyu
authors.initials: Y
authors.lastname: Dong
authors.forename: Si
authors.initials: S
authors.lastname: Lu
mesh_terms: D000180:Acrylic Resins / Q000494:pharmacology; D001672:Biocompatible Materials / Q000494:pharmacology*; D001673:Biodegradation, Environmental; D002152:Calorimetry, Differential Scanning; D049109:Cell Proliferation / Q000187:drug effects; D005612:Freeze Drying; D056945:Hep G2 Cells; D006801:Humans; D020100:Hydrogels / Q000737:chemistry / Q000494:pharmacology*; D007700:Kinetics; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D053761:Nanocomposites / Q000737:chemistry*; D044367:Phase Transition / Q000187:drug effects; D011091:Polyesters / Q000494:pharmacology*; D017640:Silicates / Q000494:pharmacology; D013696:Temperature; D014961:X-Ray Diffraction; D000094122:Polyhydroxybutyrates
chemical_list: D000180:Acrylic Resins; D001672:Biocompatible Materials; D020100:Hydrogels; D011091:Polyesters; D017640:Silicates; C052620:poly(3-hydroxybutyrate)-co-(3-hydroxyvalerate); D000094122:Polyhydroxybutyrates; C013547:hectorite; C052970:poly-N-isopropylacrylamide
keywords: Cell biocompatibility; Hydrogel; Temperature-sensitivity; poly(3-hydroxybutyrate-co-3-hydroxyvalerate); poly(N-isopropylacrylamide)