形态驱动的抗粘接,抗菌和细胞毒性作用在超水表面
Jianhong Hou1, Yiming Liang1, Xionggang Yang1
1Department of Orthopedics, The First People's Hospital of Yunnan Province & The Affiliated Hospital of Kunming University of Science and Technology, The Key Laboratory of Digital Orthopaedics of Yunnan Province, The International Union Laboratory for Intelligent Orthopedics of Yunnan Province, The Clinical Medicine Center of Spinal and Spinal Cord Disorders of Yunnan Province, Kunming, Yunnan 650032, China.
具有微纳米层次结构的超表面 (SHSs) 提供优越的液体排斥性和防性质. 它们的生物活性源于机械效应,而不仅仅是空气屏障,指导医疗和工业应用的设计.
科学领域:
- 材料科学 材料科学 材料科学
- 表面化学 表面化学
- 生物材料工程 生物材料工程
背景情况:
- 超水表面 (SHSs) 模仿自然的防水结构.
- SHS在生物医学,工业和环境领域都有潜在的应用.
- 了解形态依赖性性能对于优化SHS应用至关重要.
研究的目的:
- 系统地比较基于PTFE的微结构 (MS),纳米结构 (NS) 和微纳米层次 (MN) 的SHSs.
- 评估SHS的液体排斥性,抗,抗菌性能和细胞相容性.
- 阐明控制SHS生物活性和性能的机制.
主要方法:
- 基于PTFE的MS,NS和MN形态的SHS的制造和表征.
- 用各种液体的滑动角度测量评估液体排斥力.
- 使用ISO 22196等效方法对黄金葡萄球菌和大肠杆菌的抗菌活性的评估.
- 确定与L929纤维细胞的细胞相容性.
主要成果:
- MN表面表现出最强的抗粘性,有效地排斥高粘度液体.
- 多发性硬化和多发性硬化表面对S. aureus (>80%) 和大肠杆菌 (≈40%) 显示出显著的抗菌疗效.
- NS表面显示微不足道的抗菌活性,但保持高纤维细胞活力 (>95%),而MN表面降低活力 (≈70%).
结论:
- SHSs的生物活性是由微尺度封闭和纳米尺度突出所产生的机械杀菌效应决定的,而不仅仅是空气屏障.
- SHS的性能和生物相容性强烈依赖于它们的表面形态.
- 结果为优化医疗器械,防涂层和透明涂层的SHS提供了设计指南.
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