Journal of Inorganic Materials ›› 2017, Vol. 32 ›› Issue (7): 777-784.DOI: 10.15541/jim20160532

• Orginal Article • Previous Articles    

Effect of Gas-foaming Porogen-NaHCO3 and Citric Acid on the Properties of Injectable Macroporous Borate Bioactive Glass Cement

WU Ying-Ying1, YE Song1, YAO Ai-Hua1, LI Hai-Bin1, JIA Wei-Tao2, HUANG Wen-Hai1, WANG De-Ping1   

  1. (1. School of Materials Science and Engineering, Tongji University, Shanghai 201804, China; 2. Department of Orthopaedic Surgery, Shanghai Sixth People’s Hospital, Jiaotong University, Shanghai 200233, China)
  • Received:2016-09-20 Published:2017-07-20 Online:2017-06-23
  • About author:WU Ying-Ying (1992–), female, candidate of master degree. E-mail: tjclwyy2014@163.com
  • Supported by:
    National Natural Science Foundation of China (51372170, 81572105)

Abstract:

Borate bioactive glass (BBG) is a promising candidate material for bone tissue engineering. Mostly, it was applied in the form of scaffolds and granules. Till now, little work has been done to investigate the fabrication of porous borate bioactive glass cement (BBGC). In this work, we prepared an injectable macroporous BBGC via gas-foaming method, where NaHCO3 and citric acid were used as porogen. Porous structure was analyzed by using SEM. The properties of soaking products were characterized by XRD, FTIR and ATR. The injection test showed that the injection rate of BBGC was over 80%. SEM images presented that there were apparent pores in BBGC. The diameter of the macropores varied from 10 μm to 800 μm. Furthermore, the degradability of BBGC was greatly improved. After one month in vitro soaking, the weight loss of non-foamed BBGC was only 50wt%, while for the foamed samples, their weight loss reached 70wt%. Meanwhile, the XRD, FTIR and ATR results exhibited that there were hydroxyapatite (HA) formation and confirmed that the introduction of macropores into the BBGC did facilitate the mineralization reaction.

Key words: gas-foaming, bioactive borate glass cement (BBGC), macropores, fast-degrading

CLC Number: