改性纳米MgO/PLLA复合薄膜的制备及性能

曹秀香; 张晶; 王亮; 杨进军; 陈民芳

改性纳米MgO/PLLA复合薄膜的制备及性能

曹秀香¹,
张晶¹,
王亮¹,
杨进军¹,
陈民芳^1,2,3,

1.
天津理工大学材料学院, 天津 300384;
2.
天津市光电显示材料与器件重点实验室, 天津 300384;
3.
显示材料与光电器件省部共建教育部重点实验室, 天津 300384

基金项目: 国家自然科学基金(51371126);天津市高等学校科技发展基金(20110301)

详细信息

通讯作者:
陈民芳, 博士, 教授, 研究方向为生物医用复合材料. E-mail:mfchentj@126.com

中图分类号: TB332
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出版历程
- 收稿日期: 2013-10-21
- 修回日期: 2013-11-20
- 刊出日期: 2014-12-14

Preparation and properties of modified MgO nanoparticles/PLLA composite films

1.
School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, China;
2.
Tianjin Key Laboratory of Display Materials & Photoelectric Devices, Tianjin 300384, China;
3.
The Key Laboratory for Photoelectric Materials & Devices of the Education Ministry of China, Tianjin 300384, China

摘要

摘要: 为了改善左旋聚乳酸(PLLA)的降解性,采用溶液共混法将PLLA和MgO纳米颗粒(MgO-NPs)进行复合,制备了一种具有良好力学性能的骨修复复合材料.结果显示:改性MgO纳米颗粒(g-MgO-NPs)在PLLA基体中的分散效果及界面结合性比未改性的好.4%(质量比)g-MgO-NPs的添加量使薄膜的拉伸强度从10.6 MPa增大到30.1 MPa,断裂伸长率从71%减小为59%,并使薄膜降解后的pH值趋于稳定,基本接近生理盐水的pH值.由此表明:g-MgO-NPs在一定程度上能改善聚乳酸复合膜的降解性及其力学性能.
- 左旋聚乳酸 /
- MgO纳米颗粒 /
- 复合薄膜 /
- 力学性能 /
- DL-苹果酸
Abstract: To improve the degradability of poly (L-lactic acid) (PLLA) and prepare the bone repair material with good mechanical properties, the composites consisting of PLLA and MgO nanoparticles (MgO-NPs) have been prepared. The result suggests that, compared with pure PLLA, modified MgO nanoparticles (g-MgO-NPs) significantly enhance its dispersion in PLLA matrix and its interfacial bonding with PLLA matrix. With addition of 4%(mass ratio) g-MgO-NPs, the tensile strength of film increases from 10.6 MPa to 30.1 MPa, and its elongation at break decreases from 71% to 59%. The pH of film tends to be a relatively stable value and be close to that of the physiological saline after degradation. It reveals that g-MgO-NPs improve the degradability and mechanical properties of polylactic acid composite films in a certain extent.
- poly (L-lactic acid) /
- MgO nanoparticles /
- composite films /
- mechanical property /
- DL-malic acid