Simple room temperature bonding of thermoplastics and poly(dimethylsiloxane)
Simple room temperature bonding of thermoplastics and poly(dimethylsiloxane)
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DOI：
10.1039/c01c00272k
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发表时间：
2011-01-01
期刊：
影响因子：
6.1
通讯作者：
Cho, Yoon-Kyoung
中科院分区：
文献类型：
--
作者：
Sunkara, Vijaya;Park, Dong-Kyu;Cho, Yoon-Kyoung
我们描述了一种在室温下将热塑性塑料与弹性体聚二甲基硅氧烷（PDMS）结合的简单而通用的方法。各种热塑性塑料，包括聚碳酸酯（PC）、环烯烃共聚物（COC）、聚甲基丙烯酸甲酯（PMMA）和聚苯乙烯（PS），在室温下与PDMS结合。热塑性塑料经氧等离子体活化后，再经氨基丙基三乙氧基硅烷改性，与等离子体处理的PDMS接触，瞬间形成不可逆键合。通过水接触角测量和x射线光电子能谱对表面改性热塑性塑料进行了表征。由PC、COC、PMMA和PS制备的粘结杂化器件的拉伸强度分别为430、432、385和388 kPa。组装的设备在内部内置注射泵可实现的最大通道压力（528 kPa）下显示出高抗爆裂性。此外，它们表现出非常高的水解稳定性；即使在37℃的水中储存了三周，也没有观察到明显的变化。此外，这种热塑性- pdms键合技术已成功用于制造相对较大尺寸的器件。例如，直径为12厘米的实验室圆盘在6000转/分的极高转速下进行离心流体泵送时，没有出现泄漏。
We describe a simple and versatile method for bonding thermoplastics to elastomeric polydimethylsiloxane (PDMS) at room temperature. The bonding of various thermoplastics including polycarbonate (PC), cyclic olefin copolymer (COC), polymethylmethacrylate (PMMA), and polystyrene (PS), to PDMS has been demonstrated at room temperature. An irreversible bonding was formed instantaneously when the thermoplastics, activated by oxygen plasma followed by aminopropyltriethoxysilane modification, were brought into contact with the plasma treated PDMS. The surface modified thermoplastics were characterized by water contact angle measurements and Xray photoelectron spectroscopy. The tensile strength of the bonded hybrid devices fabricated with PC, COC, PMMA, and PS was found to be 430, 432, 385, and 388 kPa, respectively. The assembled devices showed high burst resistance at a maximum channel pressure achievable by an in-house built syringe pump, 528 kPa. Furthermore, they displayed very high hydrolytic stability; no significant change was observed even after the storage in water at 37 degrees C over a period of three weeks. In addition, this thermoplastic-to-PDMS bonding technique has been successfully employed to fabricate a relatively large sized device. For example, a lab-on-a-disc with a diameter of 12 cm showed no leakage when it spins for centrifugal fluidic pumping at a very high rotating speed of 6000 rpm.