摘要
采用静电纺丝技术制备聚乳酸(PLA)/纳米氧化铈(CeO_(2))复合纤维,系统研究纺丝液浓度、纺丝电压、接收距离和CeO_(2)添加量对纤维形貌、热性能和生物活性的影响。结果表明:纺丝液质量分数为12%时,纤维形貌最佳,直径为306 nm,均匀性高;纺丝电压为28 kV时,纤维直径最小(404 nm),热性能稳定,晶体结构均一;接收距离为20 cm时,纤维形貌优良,直径适中;CeO_(2)质量分数为1.0%时,纤维直径减至213 nm,电导率增至0.043μS/cm,热性能良好,结晶度提升至24.22%。生物活性测试显示,CeO_(2)质量分数为1.5%时,骨髓间充质干细胞(BMSCs)增殖和分化效果最佳。研究揭示了CeO_(2)通过提高电导率和抗氧化作用优化纤维性能的机制,为开发高性能生物可降解纤维材料提供参考。
Polylactic acid(PLA)/nano-cerium oxide(CeO_(2))composite fibers were prepared by electrospinning technology,and the effects of spinning solution concentration,spinning voltage,receiving distance and CeO_(2) addition on fiber morphology,thermal properties and bioactivity were systematically studied.The results showed that when the mass fraction of spinning solution was 12%,the fiber morphology was the best,the diameter was 306 nm,and the uniformity was high.When the spinning voltage was 28 kV,the fiber diameter was the smallest(404 nm),the thermal properties were stable,and the crystal structure was uniform.When the receiving distance was 20 cm,the fiber morphology was excellent and the diameter was moderate.When the mass fraction of CeO_(2) was 1.0%,the fiber diameter was reduced to 213 nm,the conductivity increased to 0.043μS/cm,the thermal properties were good,and the crystallinity was increased to 24.22%.The bioactivity test showed that when the mass fraction of CeO_(2) was 1.5%,the proliferation and differentiation of bone marrow mesenchymal stem cells(BMSCs)was the best.The research reveals the mechanism by which CeO_(2) optimizes fiber properties through enhancing electrical conductivity and antioxidant effects,providing a reference for the development of high-performance biodegradable fiber materials.
作者
王增胜
王鸿炎
WANG Zengsheng;WANG Hongyan(Huanghe S&T University,Zhengzhou 450063,China)
出处
《塑料科技》
北大核心
2025年第9期128-133,共6页
Plastics Science and Technology
基金
河南省科技攻关计划项目(182102210407)
黄河科技学院研究生联合培养资助项目
黄河科技学院教学改革项目(kg233xm002)。
关键词
聚乳酸
纳米氧化铈
静电纺丝
热性能
生物活性
Polylactic acid(PLA)
Nano-cerium oxide
Electrospinning
Thermal properties
Bioactivity
