Buckling delamination induced microchannel: Flow regulation in microfluidic devices
Buckling delamination induced microchannel: Flow regulation in microfluidic devices
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屈曲分层引起的微通道：微流体装置中的流量调节
DOI：
10.1063/1.4962429
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发表时间：
2016-09-05
影响因子：
4
通讯作者：
Tan, Huifeng
中科院分区：
文献类型：
--
作者：
Kang, Jingtian;Wang, Changguo;Tan, Huifeng
屈曲脱层微通道作为微阀可用于微流控器件中调节流体流动。这种微阀由一个柔软的基底和一个坚硬的薄膜组成，在它们之间有一个预设的小缺陷。两个临界应变值，即开关应变和破坏应变，已被提出来确定工作应变区间，使用分析预测。在此区间内，微通道的横截面积可以通过膜/基底系统的不同压缩应变来控制和预测。然后，可以通过分析和数值模拟来估计该微通道内的流体流速，并通过交替压缩应变来调整以满足不同的值。最后通过一个演示实验验证了该方法的可行性。这种柔性微阀在传统刚性微阀不适用于柔性微流体控制系统的应用中具有潜在的应用价值。
The buckling delamination induced microchannel is employed to regulate fluid flow as a microvalve which can be utilized in microfluidic devices. This microvalve consists of a soft substrate and a stiff thin film, between which there is a pre-set small imperfection. Two critical strain values, namely, on-off strain and failure strain, have been proposed to determine the working strain interval using analytical predictions. Within this interval, the cross-sectional area of the microchannel can be controlled and predicted by different compressive strains of the film/substrate system. The fluid flow rate within this microchannel can be then estimated by both analytical and numerical simulations and adjusted to satisfy different values by alternating the compressive strain. In addition, a demonstrative experiment has been taken to verify the feasibility of this approach. This flexible microvalve has potential in the application where the use of traditional rigid microvalves is improper in flexible microfluidic...