Impact of high conductivity on particle transport to liquid droplets for liquid marble formation
Impact of high conductivity on particle transport to liquid droplets for liquid marble formation
复制标题
高电导率对液体大理石形成过程中颗粒传输至液滴的影响
DOI：
10.1039/d3lf00182b
复制
发表时间：
2024
期刊：
影响因子：
--
通讯作者：
Thomas C
中科院分区：
文献类型：
--
作者：
Thomas C
本研究探讨粒子导电性的影响，促进粒子的提取和运输到一个悬垂的液滴在电场的存在下，通过施加一个薄的金属外壳的镍或金到聚苯乙烯核粒子。尽管显著增加了材料的电导率，但向核颗粒中添加金属壳对初始颗粒提取和运输行为没有伴随的显著影响。对于相同的施加电势，从比核聚苯乙烯颗粒更小的分离距离提取金涂覆的颗粒，而从稍微增加的分离距离提取镍涂覆的颗粒。小的分离距离对应于提取所需的更强的静电力，因此用金包裹聚苯乙烯颗粒使它们更难提取。此外，当与具有导电聚合物壳的相同聚苯乙烯核颗粒相比时，这些金属涂覆的颗粒从显著更小的间隔距离提取。这更多地归因于增加的颗粒间内聚力，而不是由于金属涂层而增加的颗粒质量。此外，镍和金金属壳涂覆的颗粒具有不同的颗粒疏水性，影响所得液体大理石的最终稳定性。还与玻璃芯颗粒进行了比较，以观察恒定颗粒质量和改变电导率和颗粒间内聚力的影响，突出显示电导率的增加不如内聚力的相反效果显著。在此，我们得出结论，使用静电提取方法形成液体大理石的能力取决于导电性，密度和凝聚力的基本粒子特性的复杂相互作用。
This study investigates the influence of particle conductivity on the promotion of particle extraction and transport to a pendent liquid droplet in the presence of an electric field by applying a thin metal shell of nickel or gold onto polystyrene core particles. Despite significantly increasing the conductivity of the material, the addition of a metal shell to the core particles did not have a concomitant significant impact on initial particle extraction and transport behaviour. For the same applied potential, gold coated particles were extracted from a smaller separation distance than core polystyrene particles, while nickel coated particles were extracted from a slightly increased separation distance. Small separation distances correspond to a stronger electrostatic force required for extraction, so coating the polystyrene particles with gold made them more difficult to extract. Furthermore, these metal-coated particles were extracted from significantly smaller separation distances when compared to the same polystyrene core particles with conductive polymer shells. This is attributed more to increased inter-particle cohesion than from the increased particle mass as a result of the metal coating. In addition, the nickel and gold metal shell coated particles had differing particle hydrophobicity, impacting the final stability of the resultant liquid marble. Comparison is also made with glass core particles, to observe the impact of constant particle mass and changing conductivity and interparticle cohesion, highlighting that increasing conductivity is less significant than the opposing effect of cohesion. Herein, we conclude that the ability to form liquid marbles using an electrostatic extraction method is dependent on a complex interplay of fundamental particle properties of conductivity, density, and cohesion.
电镀
DOI：
10.1007/978-94-017-9780-1_347
发表时间：
2021
期刊：
Encyclopedic Dictionary of Archaeology
影响因子：
--
作者：
Seajin Oh;M. J. Madou
通讯作者：
M. J. Madou