文章摘要
纳米生物活性玻璃形貌与粒径控制研究
  
DOI:
中文关键词: 纳米生物玻璃  聚乙二醇  形貌  粒径
英文关键词: 
基金项目:“化工能源新技术”湖南省普通高校产学研合作示范基地(湘教通[2014]239号)
作者单位
周金华,侯英杰,易重庆,赵利启 湖南省湘维有限公司湖南 怀化 419323 
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中文摘要:
      摘要:以聚乙二醇(PEG)为分散剂,采用溶胶-凝胶技术结合冷冻干燥法制备了纳米生物玻璃(NBG).研究了PEG分子量和用量对纳米生物玻璃粒径和形貌的影响.采用热重-差热分析确定了纳米生物玻璃的烧结温度,并利用FTIR,TEM和XRD对其进行了表征.热重-差热分析结果表明:NBG的烧结温度为650 ℃,烧结后得到的生物玻璃为非晶态的.采用PEG-200制备的NBG为微米级颗粒,PEG-10 000制备的NBG粒径为50~80 nm,形状为空心球状;PEG-20 000制备的NBG,其形状为长条形的纳米棒(10×100 nm).随着PEG浓度的增加,其粒径愈小.
英文摘要:
      Nano-bioactive glass (NBG), with a composition of 35CaO-60SiO2-5P2O5 (mol%), was prepared via sol-gel method and freeze-dried technique using polyethylene glycol (PEG) as dispersant. The optimal sintering temperature was determined via TG/DTA, and NBG was characterized by FTIR, TEM and XRD. XRD pattern of NBG calcined at 650 ℃ in air confirmed that the calcined glass generally existed in amorphous state. The particle size of NBG prepared with PEG200 was >100 nm. The particle size of NBG prepared with PEG10 000 was 50~80 nm, and the shape of NBG was hollow spherical. The shape of NBG with PEG 20 000 was a long strip (10×100 nm). With increasing of PEG concentration, the particle size decreased.
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