高等学校化学学报 ›› 2017, Vol. 38 ›› Issue (7): 1295.doi: 10.7503/cjcu20160701

• 高分子化学 • 上一篇    

四氧化三铁纳米粒子表面接枝聚L-谷氨酸苄酯多孔微载体的构建和性能

徐盛华, 夏鹏飞, 张坤玺, 高龙, 尹静波()   

  1. 上海大学材料科学与工程学院高分子材料系, 上海 200444
  • 收稿日期:2016-10-08 出版日期:2017-07-10 发布日期:2017-05-25
  • 作者简介:联系人简介: 尹静波, 女, 博士, 教授, 主要从事生物医用和生态环境高分子材料研究. E-mail: jbyin@oa.shu.edu.cn
  • 基金资助:
    上海市科委基础研究重点项目(批准号: 15JC1490400)和国家自然科学基金(批准号: 51373094)资助

Fabrication and Performance for Fe3O4 Nanoparticles Surface Grafted Poly(γ-benzyl-L-glutamate) Porous Microcarriers

XU Shenghua, XIA Pengfei, ZHANG Kunxi, GAO Long, YIN Jingbo*()   

  1. Department of Polymer Materials, School of Materials Science and Engineering,Shanghai University, Shanghai 201800, China
  • Received:2016-10-08 Online:2017-07-10 Published:2017-05-25
  • Contact: YIN Jingbo E-mail:jbyin@oa.shu.edu.cn
  • Supported by:
    † Supported by the Science and Technology Commission of Shanghai Municipality, China(No.15JC1490400) and the National Natural Science Foundation of China(No.51373094)

摘要:

在氨基化改性的四氧化三铁(Fe3O4)纳米粒子表面引发N-羧酸酐L-谷氨酸苄酯(BLG-NCA)开环聚合, 制得四氧化三铁/聚L-谷氨酸苄酯(PBLG)复合材料(Fe3O4-g-PBLG). 改变单体和引发剂比例可以调控Fe3O4-g-PBLG的接枝率, 采用热失重分析(TGA)测得实际接枝率分别为66.36%, 79.66%和89.52%. 通过双乳液挥发法制备磁性Fe3O4-g-PBLG多孔微载体, 其中接枝率为89.52%的微载体密度为1.034 g/mL, 孔隙率为92.57%, 粒径为200~300 μm, 孔径为40~50 μm, 保水率为370%~400%. 同时Fe3O4-g-PBLG微载体具有超顺磁性, 在外加磁场作用下可排布成任意形状, 对治疗复杂结构的骨缺损具有显著优势. 因此Fe3O4-g-PBLG多孔微载体在骨组织工程领域具有潜在应用价值.

关键词: 四氧化三铁, L-谷氨酸苄酯, 多孔微载体, 磁性能, 骨组织工程

Abstract:

Ferroferric oxide/poly(γ-benzyl-L-glutamate)(PBLG) composite materials(Fe3O4-g-PBLG) was synthesized by initiating γ-benzyl-L-glutamate-N-carboxyanhydride(BLG-NCA) polymerization on the surface of amino-functionalized ferroferric oxide(Fe3O4) nanoparticles. Fe3O4-g-PBLG composites was confirmed by Fourier transform infrared and X-ray diffraction. Thermogravimetric(TGA) study showed that the grafting ratios of Fe3O4-g-PBLG were 66.36%, 79.66%, and 89.52%, and grafting ratio of Fe3O4-g-PBLG composite could be controlled. The Fe3O4-g-PBLG with grafting ratio of 89.52% was used to fabricate magnetic Fe3O4-g-PBLG porous microcarriers. The porous microcarriers possessed suitable density(1.034 g/mL), porosity(92.57%), particle size(200—300 μm), pore size(40—50 μm) and water retention(370%—400%). Meanwhile, microcarriers exhibited superparamagnetism. Under the action of magnetic fields, the microcarriers can be arranged into any shape, showing significant advantages for the treatment of complex structure of the bone defects. These results showed that Fe3O4-g-PBLG porous microcarriers might be applied in bone tissue engineering.

Key words: Fe3O4, Poly(-benzyl-L-glutamate)(PBLG), Porous microcarrier, Magnetic property, Bone tissue engineering

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