散装聚氨的海岸硬度会对纳米纤维材料的性能产生不同的影响
Iwona Łopianiak1, Beata Butruk-Raszeja2, Michał Wojasiński2
1Faculty of Chemical and Process Engineering, Warsaw University of Technology, Warsaw, Poland; Doctoral School of Warsaw University of Technology, Warsaw, Poland.
Journal of the mechanical behavior of biomedical materials
|November 9, 2024
概括
聚氨硬度显著影响纳米纤维的特性. 更软的聚氨产生更高的抗拉强度,而更硬的聚氨则提供更大的孔隙性和刚性,这对于生物医学应用至关重要.
科学领域:
- 生物材料科学 生物材料科学
- 聚合物工程 聚合物工程
- 纳米技术 纳米技术
背景情况:
- 纳米纤维材料为生物医学应用提供了独特的特性.
- 聚氨的机械性能可以通过调整其硬度来调整.
- 溶液吹是一种生产聚氨纳米纤维的可行方法.
研究的目的:
- 为了研究散装聚氨硬度对纳米纤维材料特性的影响.
- 确定聚氨Shore硬度如何影响拉伸性能和血小板粘附.
- 评估不同类型的聚氨硬度等级对于纳米纤维生产的适用性.
主要方法:
- 从医用级聚氨 (Shore 75A-75D) 制造纳米纤维材料,使用溶液吹.
- 通过扫描电子显微镜来表征纳米纤维形态和多孔性.
- 通过拉力测试评估机械性能,并评估血小板粘附测试.
主要成果:
- 大量聚氨硬度显著影响纳米纤维的多孔性和拉伸性质.
- 最硬的聚氨 (75D) 产生了最多孔的材料 (约. 0.87孔径) 具有最高的扬模.
- 最柔软的聚氨 (75A) 产生了具有最高抗拉强度的较少多孔的地毯;所有材料都显示出出色的血小板粘附阻力 (覆盖率<1%).
结论:
- 聚氨硬度是定制纳米纤维材料特性的一个关键因素.
- 可以选择特定的硬度等级来实现所需的孔隙性,性或强度,用于诸如血管移植之类的应用.
- 溶液吹工艺有效地保留了各种硬度级别的聚氨纳米纤维中的血小板抗性等可取性质.
相关概念视频
01:21Polymer Classification: Crystallinity
2.8K
Unlike ionic or small covalent molecules, polymers do not form crystalline solids due to the diffusion limitations of their long-chain structures. However, polymers contain microscopic crystalline domains separated by amorphous domains.
Crystalline domains are the regions where polymer chains are aligned in an orderly manner and held together in proximity by intermolecular forces. For example, chains in the crystalline domains of polyethylene and nylon are bound together by van der Waals...
Crystalline domains are the regions where polymer chains are aligned in an orderly manner and held together in proximity by intermolecular forces. For example, chains in the crystalline domains of polyethylene and nylon are bound together by van der Waals...
2.8K
01:14Polymer Classification: Architecture
2.6K
Polymers are classified as linear or branched on the basis of their chain architecture. The polymer chains in linear polymers have a long chain-like structure with minimal to no branching at all. Even if a polymer features large substituent groups on the monomer, which appear as branches to the skeleton, it is not considered a branched polymer. A branched polymer contains secondary polymer chains that arise from the main polymer chain. The branching occurs when the polymer growth shifts from...
2.6K
01:08Molecular Weight of Step-Growth Polymers
2.2K
Step growth polymerization involves bi or multifunctional monomers. Bifunctional monomers react to form linear step growth polymers, whereas multifunctional monomers react to form non-linear or branched polymers.
As the step-growth polymerization involves step-wise condensation of monomers, the molecular weight also builds up eventually. Consequently, high molecular weight polymers are obtained at the late stages of the polymerization, where 99% of monomers have been consumed.
The extent of the...
As the step-growth polymerization involves step-wise condensation of monomers, the molecular weight also builds up eventually. Consequently, high molecular weight polymers are obtained at the late stages of the polymerization, where 99% of monomers have been consumed.
The extent of the...
2.2K