| 引用本文: | 陈赛,马凤仓,耿芳,刘平,刘新宽,李伟.硬脂酸改性β-磷酸三钙及其复合材料机械性能研究[J].材料科学与工艺,2016,24(1):70-74.DOI:10.11951/j.issn.1005-0299.20160111. |
| CHEN Sai,MA Fengcang,GENG Fang,LIU Ping,LIU Xinkuan,LI Wei.Study on the surface modification of β-TCP by stearic acid and the mechanical properties of its composites[J].Materials Science and Technology,2016,24(1):70-74.DOI:10.11951/j.issn.1005-0299.20160111. |
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| 硬脂酸改性β-磷酸三钙及其复合材料机械性能研究 |
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陈赛1,马凤仓2,耿芳3,刘平2,刘新宽2,李伟2
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(1.上海理工大学 机械工程学院,上海 200082;2.上海理工大学 材料科学与工程学院,上海 200082; 3.微创骨科有限责任公司,上海 201318)
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| 摘要: |
| 为了提高β-磷酸三钙(β-TCP)复合材料的机械性能，采用硬脂酸(C17H25COOH)对β-TCP表面进行改性处理，研究了β-TCP与C17H25COOH的界面作用机理.利用透射电镜、傅里叶红外光谱、热重分析等技术分别对改性前后β-TCP的颗粒形貌、组分和表面—OH基团进行了表征，研究了改性β-TCP/聚左旋乳酸(PLLA)复合材料的机械性能，并利用扫描电镜观察了复合材料断面形貌.研究表明：硬脂酸包覆在β-TCP表面，改性后β-TCP粉末具有一定的疏水性, 硬脂酸的H+可以与β-TCP中的PO43-的一个O发生质子化反应形成—OH.改性β-TCP/PLLA复合材料的机械性能相比改性前有明显提高，改性后的β-TCP微粒在PLLA中分散均匀，两者结合紧密.
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| 关键词: β-磷酸三钙 硬脂酸 表面改性 复合材料 机械性能 |
| DOI：10.11951/j.issn.1005-0299.20160111 |
| 分类号:R318.08 |
| 文献标识码:A |
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| Study on the surface modification of β-TCP by stearic acid and the mechanical properties of its composites |
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CHEN Sai1, MA Fengcang2, GENG Fang3, LIU Ping2, LIU Xinkuan2, LI Wei2
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(1.School of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai 200082,China; 2.School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200082, China; 3. Shanghai MicroPort Orthopedics Company with Limited Liability, Shanghai 201318 ,China)
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| Abstract: |
| To improve the mechanical properties of beta-tricalcium phosphate(β-TCP) composite, β-TCP was modified using stearic acid (C17H25COOH). The mechanism of interfacial interactions between β-TCP particles and stearic acid was studied. The morphology, component and —OH of β-TCP′s surface before and after surface modification were studied by TEM, FTIR, TG, DTG and XPS. The mechanical properties and the morphology of fracture surface of the modified β-TCP/poly-L-lactic acid(PLLA) composite were also studied. The results indicate that the stearic acid coats on the surface of β-TCP particles, and the modified β-TCP powder is hydrophobic. H+ of stearic acid could produce protonation reaction with O of β-TCP′s PO43- and then generates —OH. Surface modification of β-TCP particles could improve the mechanical strengths of the β-TCP/PLLA composites dramatically. The β-TCP particles with surface modification distribute in the PLLA matrix uniformly and combine with the PLLA matrix closely.
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| Key words: β-tricalcium phosphate stearic acid surface modification composites mechanical properties |
