期刊名称：Journal of Materials and Environmental Science
印刷版ISSN：2028-2508
出版年度：2016
卷号：7
期号：6
页码：1882-1897
出版社：University of Mohammed Premier Oujda
摘要：Bioglasses are important bioactive materials as they are used for the repair and reconstruction of bone tissues, by exhibitin g direct bonding with them. We used a sol -gel method to produce the bioglass po wders in the systems SiO 2 -CaO -Na 2 O-P 2 O 5 , SiO 2 -CaO-P 2 O 5 -ZnO and SiO 2 -CaO-Na 2 O-P 2 O 5 -ZnO. These glasses featured SiO 2 contents in the ran ge 40-65 mol %, 22 - 24 mol% of CaO, 2-6 mol % of P 2 O 5 , 20.5-24 mol % of Na 2 O and 4.5-15.5 mol% of ZnO. The formed crystalline phases were identified using X -ray diffraction. Infrared spectra of the bioglasses were measured before and after immersion in simulated bod y fluid and the results were compared with the same behavior for the parent bioglasses. Experimental results indicate the formation of two main crystalline phases of sodium calcium silicate (Na 2 CaSi 3 O 8 , Na 2 CaSi 3 O 9 ) according to the change in the bioglass composition. The effect of introduction of ZnO in SiO 2 -CaO-Na 2 O-P 2 O 5 system leads to the formation of a new crystalline phase of hexasodium tricalcium cyclohexasilicate (Na 6 Ca 3 Si 6 O 18 ). The in vitro studies showed the formation of an apatite-like layer covering areas of the material surface. The influence of both chemical and morphological factors on the in vitro bioactivity has been studied. The apparent density and contact angle variation with time were measured.
关键词：Bioactive glasses; Sol;gel; Zinc; in vitro bioactivity; Hydroxyapatite; Contact angle
