Liquid marble and water droplet interactions and stability.
Liquid marble and water droplet interactions and stability.
复制标题
液体大理石和水滴的相互作用和稳定性。
作者：
K. Ueno;G. Bournival;E. Wanless;S. Nakayama;E. Giakoumatos;Y. Nakamura;S. Fujii
利用高速摄像机和聚结装置研究了空气中两个独立水滴之间的相互作用。这种组合允许以毫秒分辨率可视化液滴聚结动力学，其提供关于液滴稳定性的信息。裸露的水滴在接触时迅速聚结，而通过用携带pH响应性聚[2-（二乙基氨基）乙基甲基丙烯酸酯]毛发（PDEA-PS颗粒）的聚苯乙烯颗粒涂覆液滴以形成液体大理石来实现液滴稳定性。装甲与PDEA-PS颗粒（液体大理石）的水滴（pH 3或10）与裸液滴在pH 3的不对称相互作用表现出中等稳定性与聚结后观察到的诱导时间。其中PDEA-PS颗粒具有疏水性表面的pH 10液体大理石的诱导时间比其中PDEA-PS颗粒具有亲水性表面的pH 3液体大理石的诱导时间长。此外，PDEA-PS颗粒在具有甲苯蒸气的液体大理石表面上的膜形成证实了胶囊形成，这防止了与相邻水滴的聚结，而不是在3毫秒内接触时润湿胶囊。本研究阐明了单个颗粒稳定液滴的稳定性，并对涉及其相互作用的工艺和制剂产生潜在影响。
The interactions between two individual water droplets were investigated in air using a combination of coalescence rig and high speed video camera. This combination allows the visualization of droplet coalescence dynamics with millisecond resolution which provides information on droplet stability. Bare water droplets coalesced rapidly upon contact, while droplet stability was achieved by coating the droplets with polystyrene particles carrying pH-responsive poly[2-(diethylamino)ethyl methacrylate] hairs (PDEA-PS particles) to form liquid marbles. The asymmetric interaction of a water droplet (pH 3 or 10) armoured with the PDEA-PS particles (liquid marble) with a bare droplet at pH 3 exhibited intermediate stability with coalescence observed following an induction time. The induction time was longer for the pH 10 liquid marble, where the PDEA-PS particles have a hydrophobic surface, than in the case of a pH 3 liquid marble, where the PDEA-PS particles have a hydrophilic surface. Furthermore, film formation of PDEA-PS particles on the liquid marble surface with toluene vapour confirmed capsule formation which prevented coalescence with the neighbouring water droplet instead wetting the capsule upon contact within 3 milliseconds. This study illuminates the stability of individual particle-stabilized droplets and has potential impact on processes and formulations which involve their interaction.
影响因子：
15
作者：
Wang, Weixing;Bray, Christopher L.;Cooper, Andrew I.
通讯作者：
Cooper, Andrew I.
影响因子：
3.9
作者：
Carter, Benjamin O.;Wang, Weixing;Cooper, Andrew I.
通讯作者：
Cooper, Andrew I.
影响因子：
4
作者：
Brown, C. V.;Al-Shabib, W.;Newton, M. I.
通讯作者：
Newton, M. I.