在降解过程中表征网络的学性质和微观结构
Shivani Desai1, Benjamin J Carberry2, Kristi S Anseth2
1Department of Chemical and Biomolecular Engineering, Lehigh University, 124 E Morton St, Bethlehem, PA, 18015, USA. kes513@lehigh.edu.
Soft matter
|September 25, 2023
概括
这项研究描述了生物医学应用适应性聚合物网络的退化. 研究人员发现,多余醇含量的变化会影响网络弹性和降解动态,这对于设计有效的可植入材料至关重要.
科学领域:
- 生物材料科学 生物材料科学
- 聚合物化学 聚合物化学
- 类风病学 类风病学 类风病学
背景情况:
- 共价适应性网络对于细胞/药物输送和组织再生至关重要.
- 这些应用需要受控的降解和特定的微观结构特性.
- 了解降解动态是优化生物材料性能的关键.
研究的目的:
- 描述聚乙烯糖醇 (PEG) - 铁网络的降解.
- 调查过多的硫醇含量对网络微观结构和质学的影响.
- 在降解过程中将动态质性质与宏观材料行为相关联.
主要方法:
- 光聚合被用来形成PEG-thioester网络,其中多余的醇含量不同.
- 多重颗粒跟踪微风学 (MPT) 测量探头颗粒运动以确定风学性质.
- 时间治愈叠加 (TCS) 在凝-溶液过渡时分析了网络微观结构.
- 测量了诸如平衡模量和应力放松等宏观性质.
主要成果:
- 发现有0%和50%多余醇的网络是紧密交叉连接和弹性的.
- 具有100%多余硫醇的网络表现出理想的,透的网络的特性.
- 在降解过程中,MPT揭示了探头运动率的非单调增加,这表明网络重新安排.
- 宏观性质与微观结构分析一致,50%的多余醇网络显示出更大的弹性.
结论:
- 过多的醇含量显著影响PEG-thioester网络的弹性和降解行为.
- 这项研究提供了与生理条件相关的降解过程中网络重组的见解.
- 这项研究为设计具有可调节降解率和质性质的可植入生物材料提供了基础.
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