中国塑料 ›› 2023, Vol. 37 ›› Issue (1): 1-7.DOI: 10.19491/j.issn.1001-9278.2023.01.001

• 材料与性能 •    下一篇

聚乳酸⁃羟基乙酸共聚物涂层对聚乳酸3D打印支架的性能影响

汪杰, 张伟蒙, 胡晶()   

  1. 北京工商大学化学与材料工程学院,北京 100048
  • 收稿日期:2022-09-13 出版日期:2023-01-26 发布日期:2023-01-26
  • 通讯作者: 胡晶(1982-),女,副教授,从事生物降解材料及降解机理,高性能3D打印材料、聚合物、金属及其复合材料3D打印成型工艺及机制,hujing@th.btbu.edu.cn
    E-mail:hujing@th.btbu.edu.cn
  • 基金资助:
    国家重点研发计划(2019YFD1101205)

Effect of poly(lactic acid)⁃co⁃hydroxyacetic acid copolymer coating on performance of poly(lactic acid) 3D printed scaffolds

WANG Jie, ZHANG Weimeng, HU Jing()   

  1. School of Chemistry and Materials Engineering,Beijing Technology and Business University,Beijing 100048,China
  • Received:2022-09-13 Online:2023-01-26 Published:2023-01-26
  • Contact: HU Jing E-mail:hujing@th.btbu.edu.cn

摘要:

通过熔融沉积(FDM)三维(3D)打印技术制备了61.7 %孔隙率和良好连通性的3D多孔聚乳酸(PLA)支架,使用浸涂法对PLA支架表面涂覆浓度分别为2 %、4 %、6 %、8 %的聚乳酸⁃羟基乙酸共聚物(PLGA)涂层,获得了不同浓度涂层的PLA/PLGA复合支架。通过扫描电子显微镜(SEM)、接触角测量仪、万能试验机和细胞计数试剂盒⁃8方法等测试手段,探究了不同浓度PLGA涂层对PLA支架的断面微观形貌、支架表面亲水性、力学强度以及细胞在支架上增殖活性等性能的影响规律。结果表明,与未经包裹的PLA支架相比,包裹PLGA的PLA支架表面接触角显著减小,PLGA的质量分数为6 %时接触角最小为(64.7±1.1) °;接种后经24 h培养PLA/PLGA支架表面细胞活性较纯PLA支架显著增强。

关键词: 三维打印, 支架, 聚乳酸, 聚乳酸?羟基乙酸共聚物, 涂层

Abstract:

Three⁃dimensional porous poly(lactic acid) (PLA) scaffolds with a porosity of 61.7 % and good connectivity were prepared by using a 3D⁃printing technology. Then, PLA/poly(lactic acid⁃co⁃hydroxyacetic acid) copolymer (PLGA) composite scaffolds were prepared by coating PLGA on the surface of the PLA scaffolds with different concentrations of PLGA using a dip⁃coating method. The effects of PLGA concentrations on the properties of PLA scaffolds such as cross⁃sectional microscopic morphology, scaffold surface hydrophilicity, mechanical strength, and the cell proliferation activity on the scaffolds were investigated by using scanning electron microscopy, contact angle analyzer, universal testing machine, and cell counting Kit⁃8. The results indicated that the PLGA⁃coated PLA scaffolds presented a significant decrease in contact angle compared to the PLA scaffolds without a PLGA coating. They exhibited the smallest contact angle of 64.7 ° ± 1.1 ° at a PLGA mass fraction of 6 %. The cell activity on the surface of PLGA/PLA composite scaffolds was enhanced significantly after the cell inoculation for 24 h.

Key words: 3Dimension printing, scaffold, poly(lactic acid), poly(lactic acid?co?hydroxyacetic acid) copolymer, coating

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