The design and fabrication of autonomous polymer-based surface tension-confined microfluidic platforms
The design and fabrication of autonomous polymer-based surface tension-confined microfluidic platforms
复制标题
DOI：
10.1007/s10404-007-0229-5
复制
发表时间：
2008-06
影响因子：
2.8
通讯作者：
M. Swickrath;Ae Suresh;Shenoy Ae;J. Adin;Mann Jr Ae;J. Belcher;Ae Robert;Kovar Ae;G. Wnek
中科院分区：
文献类型：
--
作者：
M. Swickrath;Ae Suresh;Shenoy Ae;J. Adin;Mann Jr Ae;J. Belcher;Ae Robert;Kovar Ae;G. Wnek
已经建立了一种用亲水性醋酸纤维素对疏水性聚氯乙烯（PVC）基材进行图案化的一步厚膜印刷工艺。利用限定厚度的间隔材料使相对的图案化基底材料紧密靠近。平行板配置的装置能够通过毛细作用支持自主流体输送。利用经济实惠的个人打印机来生成光掩模，可以实现最小可达到的路径宽度 313.3 ± 17.9 μm。此外，还提出了该系统的理论模型，该模型预测弯月面位置随时间和系统架构的变化，以及实验数据，结果发现与该模型非常一致。最后，对表面的曲率进行近似，并利用它来确定离散表面上所有点处气液界面处弯曲表面的真实压力跃变。发现曲率相关的压力跳跃结果与拉普拉斯压力近似一致。
A one-step thick film printing process has been established for patterning hydrophobic polyvinyl chloride (PVC) substrate materials with hydrophilic cellulose acetate. The opposing patterned substrate materials are brought within close proximity utilizing spacer material of defined thickness. The parallel-plate configured devices are capable of supporting autonomous fluid transport through capillarity. Minimum attainable path widths of 313.3 ± 17.9 μm can be achieved utilizing an affordable personal printer for photomask generation. In addition, a theoretical model for this system predicting meniscus position as a function of time and system architecture is posed along with experimental data which is found to be in good agreement with the model. Lastly, the curvature of the surface is approximated and exploited for the determination of the true pressure jump across the curved surface at the gas–liquid interface at all points on a discretized surface. The curvature associated pressure jump results are found to be consistent with the Laplace pressure approximation.