Stability of UV/ozone-treated thermoplastics under different storage conditions for microfluidic analytical devices.
Stability of UV/ozone-treated thermoplastics under different storage conditions for microfluidic analytical devices.
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DOI：
10.1039/c7ra07435b
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发表时间：
2017-07-29
期刊：
影响因子：
3.9
通讯作者：
Lillehoj PB
中科院分区：
文献类型：
--
作者：
Lin TY;Pfeiffer TT;Lillehoj PB
经过 UVO 处理的塑料的疏水性恢复可以通过将其储存在除湿或真空条件下来抑制。热塑性塑料正在成为制造微流体装置的流行材料，并且对稳健的表面改性策略的需求日益增长。紫外线/臭氧 (UVO) 处理是一种简单有效的方法，可以使塑料表面更加亲水。之前有关 UVO 处理塑料稳定性的报告仅限于四个星期，这对于需要长期储存的应用来说是不够的。在这里，我们提出了关于经过 UVO 处理的塑料长达 16 周的长期稳定性的新发现，并表明储存条件对表面稳定性有显着影响。对储存在空气、除湿和真空条件下的经 UVO 处理的环烯烃共聚物 (COC)、聚碳酸酯 (PC) 和聚甲基丙烯酸甲酯 (PMMA) 进行静态接触角测量、X 射线光电子能谱 (XPS) 和原子力显微镜 (AFM)。我们发现，经UVO处理的COC和PC的疏水性恢复可以通过在除湿或真空条件下储存来抑制，而PMMA的稳定性不受储存条件的显着影响。进行的蛋白质吸附研究表明，与未经处理的塑料相比，经过 UVO 处理的塑料的蛋白质吸附量显着减少。最后，制造了经过 UVO 处理的 PMMA 微通道，并将其用于毛细管驱动流动，这表明较长的处理持续时间会产生更快的流速。这些综合结果为 UVO 处理塑料在微流体分析应用中的实用性提供了新的见解。
Hydrophobic recovery of UVO-treated plastics can be inhibited by storing them in dehumidified or vacuum conditions. Thermoplastics are becoming a popular material for fabricating microfluidic devices and there is an increasing need for robust surface modification strategies. UV/ozone (UVO) treatment is a simple and effective method for making plastic surfaces more hydrophilic. Prior reports on the stability of UVO-treated plastics are limited to four weeks, which is not sufficient for applications requiring long-term storage. Here, we present new findings on the long-term stability of UVO-treated plastics for up to 16 weeks and show that the storage condition has a significant impact on the surface stability. Static contact angle measurements, X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM) were performed on UVO-treated cyclic olefin copolymer (COC), polycarbonate (PC) and poly(methyl methacrylate) (PMMA) stored in air, dehumidified and vacuum conditions. We found that the hydrophobic recovery of UVO-treated COC and PC can be inhibited by storing them in dehumidified or vacuum conditions, whereas the stability of PMMA is not significantly influenced by the storage condition. Protein adsorption studies were carried out and showed that there is a significant reduction in the amount of protein adsorption on UVO-treated plastics compared with untreated plastics. Lastly, UVO-treated PMMA microchannels were fabricated and used for capillary-driven flow, which revealed that longer treatment durations generate faster flow rates. These collective results offer new insights into the utility of UVO-treated plastics for microfluidic analytical applications.
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影响因子：
6.1
作者：
Zimmermann, Martin;Schmid, Heinz;Delamarche, Emmanuel
通讯作者：
Delamarche, Emmanuel
等离子体处理的超疏水表面在不同环境条件下的稳定性
影响因子：
9.9
作者：
Chen, Faze;Liu, Jiyu;Liu, Xin
通讯作者：
Liu, Xin
DOI：
10.1126/science.1191035
发表时间：
2010-08-27
期刊：
Science (New York, N.Y.)
影响因子：
--
作者：
Gilbert PM;Havenstrite KL;Magnusson KE;Sacco A;Leonardi NA;Kraft P;Nguyen NK;Thrun S;Lutolf MP;Blau HM
通讯作者：
Blau HM
影响因子：
6.1
作者：
Toepke, Michael W.;Beebe, David J.
通讯作者：
Beebe, David J.
影响因子：
15.6
作者：
Rabe, Michael;Verdes, Dorinel;Seeger, Stefan
通讯作者：
Seeger, Stefan