聚二甲基素表面修改微流体装置用于血分离
Margarida Gonçalves1,2, Inês Maia Gonçalves3,4,5, Joel Borges6,7
1Microelectromechanical Systems Research Unit, CMEMS-UMinho, University of Minho, Campus de Azurém, 4800-058 Guimarães, Portugal.
Polymers
|May 25, 2024
概括
研究人员修改了聚二甲基西洛 (PDMS) 微流体装置,以改善血分离. 使用聚乙烯氧化物 (PEO) 表面活性剂的表面修饰产生了水友性表面,提高了设备效率和样品纯度.
科学领域:
- 生物医学工程 生物医学工程
- 材料科学 材料科学 材料科学
- 分析化学 分析化学
背景情况:
- 微流体设备对于分析和临床诊断至关重要,使生物样本处理成为可能.
- 聚甲基 (PDMS) 是广泛使用的,但其疏水性质阻碍了在等离子体分离等应用中的性能.
- 疏水表面导致湿度差,液体混合问题,生物分子检测和血分离效率降低.
研究的目的:
- 调查表面修饰方法,以创建水友性PDMS微流体装置.
- 评估不同表面活性剂和改造技术的有效性,以改善PDMS的湿透性.
- 为了提高血分离在微流体设备中的效率.
主要方法:
- 使用立体石刻和PDMS双造制造微流体设备的制造.
- 使用Pluronic® F127,聚乙烯糖醇 (PEG) 和聚乙烯氧化物 (PEO) 表面活性剂的散装混合物和表面浸泡方法进行PDMS的表面修饰.
- 使用水接触角 (WCA) 测量和毛细血管流量研究来表征表面湿透性.
主要成果:
- 用2.5% (v/v) 的聚乙烯氧化物 (PEO) 表面活性剂修饰的PDMS表面长时间表现出最佳的水友特性 (WCA <50°).
- 经过PEO修改的PDMS表面保持了光学性能,没有降解.
- 毛细管流量研究表明,改进的微通道改善了流体处理和减少了空气泡的捕获.
结论:
- PDMS表面修改,特别是PEO,显著提高了微流体设备的水友性和性能.
- 改善的湿透性促进血分离,减少细胞聚合,并最大限度地减少气泡问题.
- 这种方法为开发更高效,更可靠的微流体诊断工具提供了一个有希望的策略.
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