title: Surfactant-assisted sonochemical synthesis of hollow calcium silicate hydrate (CSH) microspheres for drug delivery.
abstract: Hollow calcium silicate hydrate (CSH) microspheres with diameters around 1 microm were synthesized by a surfactant-assisted sonochemical route, and the products were characterized by XRD, SEM, FETEM and BET techniques. The results suggested that the ultrasound radiation, surfactant and Ca source were important factors which affected the formation of hollow microspheres. Based on the observation of products in different reaction systems, the possible mechanism for the formation of hollow CSH spheres was discussed. Furthermore, gentamicin, a typical anti-inflammatory drug, was used to investigate the drug loading and release behavior of the hollow spheres. The results indicated that CSH hollow spheres had high drug loading capacity and favorable drug release behavior, and might be used for preparation of bone grafts with drug delivery properties.
authors.affiliation: State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, People's Republic of China.
authors.forename: Meili
authors.initials: M
authors.lastname: Zhang
authors.forename: Jiang
authors.initials: J
authors.lastname: Chang
mesh_terms: D000042:Absorption; D017610:Calcium Compounds / Q000737:chemistry* / Q000528:radiation effects*; D004337:Drug Carriers / Q000737:chemistry* / Q000528:radiation effects*; D004339:Drug Compounding / Q000379:methods; D008863:Microspheres; D016062:Porosity; D017640:Silicates / Q000737:chemistry* / Q000528:radiation effects*; D013010:Sonication; D013501:Surface-Active Agents / Q000737:chemistry* / Q000528:radiation effects; D014867:Water / Q000737:chemistry
chemical_list: D017610:Calcium Compounds; D004337:Drug Carriers; D017640:Silicates; D013501:Surface-Active Agents; D014867:Water; C031293:calcium silicate