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通过超疏水表面上的锯齿形超亲水图案设计,实现了液滴的自发定向移动,为微流控芯片提供了一种低能耗、高效的液滴操控方案。研究发现,液滴的运动由拉普拉斯力与润湿梯度力协同驱动,其速度与加速度受锯齿形图案长宽之比δ的调控。通过实验得出结论:与δ=50时相比,液滴沿δ=45、δ=40、δ=35、δ=30、δ=25、δ=20运动的最大速度显著提升了4.62%、9.73%、15.41%、21.80%、27.77%、34.31%。进一步研究液滴在倾斜角分别为3°、5°、8°的锯齿形超亲水表面上的自驱动性能,当倾角为3°、5°时,液滴能够克服粘滞力和自身重力自下而上自发运动,但当倾角增大到8°时,液滴只能在δ<30的表面实现爬坡运动。
Abstract：A serrated superhydrophilic pattern on a superhydrophobic surface is designed to achieve the spontaneous directional movement of droplets and provide a low-energy,efficient droplet manipulation solution for microfluidic chips.The research finds that droplet motion is driven synergistically by Laplace force and wetting gradient force,with velocity and acceleration regulated by the aspect ratio δ of the serrated pattern.Experimental results conclude that compared to δ=50,the maximum droplet velocity along δ=45,δ=40,δ=35,δ=30,δ=25,and δ=20 increased by 4.62%,9.73%,15.41%,21.80%,27.77% and 34.31% respectively.Further investigation into the self-propelled performance of droplets on serrated superhydrophilic surfaces with tilt angles of 3°,5°and 8° reveals that at 3° and 5° tilt angles,droplets can overcome viscous force and their own gravity to move spontaneously upward.However,when the tilt angle increases to 8°,droplets can only achieve uphill movement on surfaces with δ<30.
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基本信息:
中图分类号:O35
引用信息:
[1]胡翠书,邱超,张俊杰.液滴沿锯齿形超疏水-超亲水界面自发移动的运动特性研究[J].中国民航飞行学院学报,2026,37(01):28-32+48.
基金信息:
国家自然科学基金项目(No.52205238); 中央高校基本科研业务费专项资金(J2023-029)
2026-01-10
2026-01-10