title: SEM and TEM for structure and properties characterization of bacterial cellulose/hydroxyapatite composites.
abstract: Preparation of composites with different properties and gradient of components is aimed at better performance of materials for bone substitution. Bacterial cellulose-hydroxyapatite (BC-HAP) composites with various mass ratio of the components (BC-25HAP, BC-4HAP, and BC-HAP) were prepared by a novel method of growing HAP nanocrystals (the linear size ≤30 nm) in water solutions in the presence of the BC gel-film micro-fragments. Varying the BC-HAP ratios leads to a gradual change of the physical properties of the materials. It was found that an increase in the BC content results in a decrease of the HAP crystal length and specific surface area, porosity, and pore volume while the values of density and Young's modulus values increase. SCANNING 38:757-765, 2016. © 2016 Wiley Periodicals, Inc.
authors.affiliation: Shubnikov Institute of Crystallography of FSRC "Crystallography and Photonics" of Russian Academy of Sciences, Moscow, Russia.
authors.forename: Natalia A
authors.initials: NA
authors.lastname: Arkharova
authors.affiliation: Shubnikov Institute of Crystallography of FSRC "Crystallography and Photonics" of Russian Academy of Sciences, Moscow, Russia.
authors.forename: Elena I
authors.initials: EI
authors.lastname: Suvorova
authors.affiliation: Faculty of Chemistry, Moscow State University, Moscow, Russia.
authors.forename: Alexander V
authors.initials: AV
authors.lastname: Severin
authors.affiliation: Institute of Macromolecular Compounds of Russian Academy of Sciences, St. Petersburg, Russia.
authors.forename: Albert K
authors.initials: AK
authors.lastname: Khripunov
authors.affiliation: National Research Centre "Kurchatov Institute", Moscow, Russia.
authors.forename: Sergey V
authors.initials: SV
authors.lastname: Krasheninnikov
authors.affiliation: Shubnikov Institute of Crystallography of FSRC "Crystallography and Photonics" of Russian Academy of Sciences, Moscow, Russia.
authors.forename: Vera V
authors.initials: VV
authors.lastname: Klechkovskaya
mesh_terms: D001672:Biocompatible Materials / Q000737:chemistry*; D002482:Cellulose / Q000737:chemistry*; D017886:Durapatite / Q000737:chemistry*; D055119:Elastic Modulus; D008855:Microscopy, Electron, Scanning / Q000379:methods*; D046529:Microscopy, Electron, Transmission / Q000379:methods*; D053761:Nanocomposites / Q000737:chemistry*; D016062:Porosity
chemical_list: D001672:Biocompatible Materials; D002482:Cellulose; D017886:Durapatite
keywords: HRTEM; bacterial cellulose; biocomposites; hydroxyapatite nanocrystals; porosity