生物基PLA/PBS/PBAT三级混合物的泡与添加的纳米氧酸盐使用超临界CO2:操作策略对细胞结构的影响
Pei-Hua Chen1,2, Chin-Wen Chen3, Tzu-Hsien Chan3
1Department of Biomedical Engineering, National Taiwan University, Taipei 106319, Taiwan.
Molecules (Basel, Switzerland)
|May 14, 2025
概括
这项研究优化了使用超临界CO2的可生物降解聚合物的泡. 一个循序渐进的减压策略创造了一个双模细胞结构,非常适合组织工程应用.
科学领域:
- 材料科学 材料科学 材料科学
- 生物材料工程 生物材料工程
- 聚合物科学 聚合物科学
背景情况:
- 可生物降解的聚合物对于可持续材料和组织工程至关重要.
- 超临界二氧化碳 (SCCO2) 为聚合物提供了一个环保的发泡剂.
- 纳米酸 (nHA) 可以增强生物医学应用的聚合物特性.
研究的目的:
- 通过使用SCCO2.2,研究一种与nHA增强的新型PLA/PBS/PBAT混合物的发泡行为.
- 探索不同的泡策略对细胞结构和特性的影响.
- 为潜在的组织工程应用优化发泡参数.
主要方法:
- 使用了八种不同的泡策略,涉及温度和压力的变化 (例如,1T-1P,2T-1P,2T-2P).
- 使用扫描电子显微镜 (SEM) 来分析细胞形态和结构.
- 通过使用动态机械分析 (DMA) 测量水接触角和机械性能来评估水友性.
主要成果:
- 采用 (2T-2P,分阶段 ΔP) 策略,产生了一种双模细胞结构,具有明显的小 (105-164 μm) 和大 (476-889 μm) 细胞.
- 细胞大小受到中间压力降低和温度变化的显著影响.
- 报告了关键的发泡指标,包括细胞大小,密度,膨胀率,多孔度和开放细胞含量.
结论:
- 开发的泡策略有效地控制了可生物降解聚合物混合物的细胞结构.
- 实现的双模细胞结构表明了增强细胞透和组织再生的潜力.
- 该研究为为特定的生物医学应用量身定制可生物降解聚合物泡提供了基础.
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