聚 (l-乳酸) 导向微孔材料的制备和抗菌性能
Yihong Li1, Yanjun Feng2, Qingyi Huang1
1School of Material Science and Engineering, Xihua University, Chengdu 610039, China.
Biomolecules
|November 27, 2024
概括
这项研究结合了固体热绘制和超临界CO2发泡,以创建面向微孔聚乳酸 (PLLA). 由此产生的材料表现出增强的抗拉强度,提高了性,并且由于聚甲基西洛而具有持续的抗菌特性.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物科学 聚合物科学
- 生物材料工程 生物材料工程
背景情况:
- 聚氨酸乳酸 (PLLA) 是一种可生物降解的聚合物,在各种领域都有潜在的应用.
- 开发具有改进机械性能和功能的先进PLLA材料对于更广泛的采用至关重要.
- 现有的加工技术在实现受控的微孔结构和提高性能方面往往面临局限性.
研究的目的:
- 在PLLA中使用固体热绘制 (SHD) 和超临界二氧化碳 (SC-CO2) 泡的组合开发出面向微孔结构.
- 调查聚甲基 (PDMS) 在增强核化和控制SC-CO2发泡过程中微孔均性的作用.
- 评估联合加工对PLLA机械性能 (抗拉强度,性) 和抗菌活性的影响.
主要方法:
- 采用固体热绘制 (SHD) 技术来诱导PLLA的方向.
- 绿色加工超临界二氧化碳 (SC-CO2) 泡被用于创建微孔结构.
- 聚甲基 (PDMS) 作为核化剂和结构调节添加剂在发泡过程中被引入.
主要成果:
- SHD和SC-CO2泡的组合成功地在PLLA中创建了一个面向的微孔结构.
- 导向诱导了PLLA结晶,导致拉伸强度显著提高,达到最大151.2 MPa.
- 微孔结构主要增强了性,破裂时的最大延长率达到148.3%.
- 添加PDMS提高了面向微孔的均性,并为PLLA材料传递了持续的抗菌特性.
结论:
- SHD和SC-CO2泡的协同组合是制造先进PLLA材料的有效策略.
- 开发的面向微孔PLLA具有卓越的机械强度和性.
- 纳入PDMS通过增强的处理和固有的抗菌功能提供了附加值,扩大了潜在的应用.
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