A facile route for irreversible bonding of plastic-PDMS hybrid microdevices at room temperature
A facile route for irreversible bonding of plastic-PDMS hybrid microdevices at room temperature
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DOI：
10.1039/b924753j
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发表时间：
2010-01-01
期刊：
影响因子：
6.1
通讯作者：
Lee, Nae Yoon
中科院分区：
文献类型：
--
作者：
Tang, Linzhi;Lee, Nae Yoon
塑料材料通常不与聚（二甲基硅氧烷）（PDMS）形成不可逆的键，而不管氧等离子体处理和随后的热处理。在本文中，我们在室温下进行塑料-PDMS键合，介导的形成一个化学稳定的胺-环氧键的接口。采用各种塑料材料，例如聚（甲基丙烯酸甲酯）（PMMA）、聚碳酸酯（PC）、聚酰亚胺（PI）和聚（对苯二甲酸乙二醇酯）（PET）作为塑料材料的选择。无论使用的塑料材料，表面被成功地改性胺和环氧官能团，证实了表面表征，如水接触角测量和X射线光电子能谱（XPS），和化学稳定的和不可逆的键合在室温下1小时内成功地实现。PDMS与PMMA和PC片的粘合强度分别测量为180和178 kPa，并且它们的包含微通道结构的组件分别承受高达74和84 psi（510和579 kPa）的引入的压缩空气，而不破坏微器件，代表了稳健且高度稳定的界面粘合。除了与平坦塑料基板结合的微通道模制的PDMS之外，微通道压花塑料也与平坦的PDMS片材结合，并且两种类型的结合组件显示出足够坚固的结合，耐受每分钟注射体积比所使用的微通道的总内部体积高近1000至2000倍的液体的强烈流入。除了观察粘结性能，我们还研究了潜在的表面胺和环氧官能团作为耐用的化学粘合剂，通过观察其存储时间依赖的粘结性能。
Plastic materials do not generally form irreversible bonds with poly(dimethylsiloxane) (PDMS) regardless of oxygen plasma treatment and a subsequent thermal process. In this paper, we perform plastic-PDMS bonding at room temperature, mediated by the formation of a chemically robust amine-epoxy bond at the interfaces. Various plastic materials, such as poly(methylmethacrylate) (PMMA), polycarbonate (PC), polyimide (PI), and poly(ethylene terephthalate) (PET) were adopted as choices for plastic materials. Irrespective of the plastic materials used, the surfaces were successfully modified with amine and epoxy functionalities, confirmed by the surface characterizations such as water contact angle measurements and X-ray photoelectron spectroscopy (XPS), and chemically robust and irreversible bonding was successfully achieved within 1 h at room temperature. The bonding strengths of PDMS with PMMA and PC sheets were measured to be 180 and 178 kPa, respectively, and their assemblies containing microchannel structures endured up to 74 and 84 psi (510 and 579 kPa) of introduced compressed air, respectively, without destroying the microdevices, representing a robust and highly stable interfacial bonding. In addition to microchannel-molded PDMS bonded with flat plastic substrates, microchannel-embossed plastics were also bonded with a flat PDMS sheet, and both types of bonded assemblies displayed sufficiently robust bonding, tolerating an intense influx of liquid whose per-minute injection volume was nearly 1000 to 2000 times higher than the total internal volume of the microchannel used. In addition to observing the bonding performance, we also investigated the potential of surface amine and epoxy functionalities as durable chemical adhesives by observing their storage-time-dependent bonding performances.