通过反应性石墨烯氧化物来定制可生物降解的多乳酸/多乙烯基酸-共甲酸混合物的结构和特性
Xiaoming Guo1, Zhenjiang Fu1, Xin Liu1
1School of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China.
International journal of biological macromolecules
|February 3, 2025
概括
功能化石墨烯氧化物纳米粒子提高了聚乳酸 (PLA) 混合物的强度和灵活性. 这种新型兼容剂增强了用于组织工程和医疗器械的机械性能.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
背景情况:
- 混合物中聚乳酸 (PLA) 和聚乙烯基甲基甲基甲酸盐 (PBAT) 的相容性较差,导致机械性能降低.
- 现有的弹性体硬化PLA混合物由于固有的不相容性而遭受了显著的强度和模量损失.
研究的目的:
- 使用功能化石墨烯氧化物纳米粒子开发PLA/PBAT混合物的新型兼容剂.
- 研究两步制备过程对纳米粒子分散和混合物特性的影响.
- 提高PLA/PBAT混合物的机械性能,用于先进的应用.
主要方法:
- 通过"乙烯点击"反应合成硫化石墨烯氧化物-环氧化物 (SGO-GMA) 纳米粒子.
- 使用单步和双步SGO-GMA合并方法制备PLA/PBAT混合物.
- 混合物形态,结晶行为和机械性能 (拉伸强度,破裂时的延长,冲击强度) 的表征.
主要成果:
- 成功合成了SGO-GMA纳米颗粒,并证明了与PLA和PBAT的化学反应性.
- 这两步过程有效地将SGO-GMA固定在PLA/PBAT接口上,防止迁移并促进接口粘附.
- 通过两步方法加入1重%的SGO-GMA导致了显著的改进:拉伸强度为7.9%,破裂时延伸为40.7%,冲击强度为57.1%.
- 在单步过程中,PLA阶段的结晶率显著增加,而两步过程优化了界面相互作用.
结论:
- 开发的SGO-GMA纳米颗粒对PLA/PBAT混合物起到有效的兼容作用,尤其是在采用两步方法加入时.
- 由有效的功能化石墨烯氧化物兼容驱动的增强机械性能,为PLA在组织工程和医疗设备中开辟了道路.
- 这项研究提出了一个有前途的策略,通过有针对性的纳米粒子功能化和加工来提高可生物降解聚合物混合物的性能.
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