Characterization of fluidic transportation properties of open microchannels with a hydrophobic mesh

摘要：

　　Fluidic transportation in an open microchannel is crucial for applications in bioaerosols sampling.We demonstrated stable water transportation in an open microchannel covered with a hydrophobic mesh.The factors that affect the stability of water transportation in the open microchannel were investigated by theoretical calculations and experiments.The stability is dependent on the mesh properties and flow velocity in the microchannel and is sensitive to the geometry and the surface properties of the microchannel.The more hydrophobic the mesh and the smaller the mesh hole,the higher the maximum allowable pressure in the microchannel is and thus the water transportation is more stable.The maximum allowable pressure up to about 2000 Pa was achieved using a Teflon-coated mesh with hole size of 50μm.The maximum allowable flow velocity in the channel is determined by the channel geometry and the maximum allowable pressure of the mesh film.In a shallower and longer channel the maximum allowable velocity is lower.For a hydrophobic channel the capillary pressure caused by the surface tension disadvantages the stability of water transportation,and the adverse effect is more significant in a smaller channel.

关键词： Microfluidic open microchannel fluidic transportation hydrophobic mesh surface tension

作者: MA Zengshuai YE Xiongying DU Min

作者单位: State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision In State Key Laboratory of Precision Measurement Technology and Instruments, Department of PrecisionIns

会议类型: 国际会议

会议名称: 中国微米纳米技术学会第14届学术年会、第3届国际年会暨第6届微米纳米技术“创新与产业化国际研讨与展览会(CSMNT2012 & ICMAN2012)

会议地点: 杭州

会议语种:英文

页码: 1-6

在线出版日期: 2012-11-04（万方平台首次上网日期，不代表论文的发表时间）