论文标题
（超级）在疏水表面上含三硅氧烷的量子点纳米流体的扩散和干燥
(Super)Spreading and drying of trisiloxane-laden quantum dot nanofluids on hydrophobic surfaces
论文作者
论文摘要
纳米流体对各个行业领域都有希望。然而，在干燥和纳米流体传播过程中，尤其是含有表面活性剂的润湿行为和沉积形成的理解仍然很差。在本文中，已经在实验中研究了基于量子点的纳米流体和蒸发驱动的自组装的蒸发动力学，在六甲基二烷烷，聚苯乙烯 - 和聚丙烯涂层的疏水液表面上的纳米固醇悬浮液中的蒸发动力学已被实验。此外，我们第一次迈出了一步，以理解超级表面活性剂纳米流体的润湿动力学。据表明，与纯液体的干燥无表面活性剂量子点纳米流体的干燥不是三种，而是四种蒸发模式，包括最后一个额外的固定模式，当接触角降低时，而三重接触线则由纳米晶体固定。与以前的研究相反，发现在水性表面活性剂溶液中添加纳米颗粒会导致扩散速率恶化和形成双咖啡环。对于所有检查的表面，都会在存在和不存在量子点纳米颗粒的情况下进行超级广播。尽管在所有底物上形成了咖啡环，但它们的形态不同。特别是，将结状结构纳入六甲硅烷基和聚苯乙烯涂层的表面上的环中
Nanofluids hold promise for a wide range of areas of industry. However, understanding of wetting behavior and deposition formation in course of drying and spreading of nanofluids, particularly containing surfactants, is still poor. In this paper, the evaporation dynamics of quantum dot-based nanofluids and evaporation-driven self-assembly in nanocolloidal suspensions on hexamethyldisilazane-, polystyrene-, and polypropylene-coated hydrophobic surfaces have been studied experimentally. Moreover, for the very first time, we make a step to understanding of wetting dynamics of superspreader surfactant-laden nanofluids. It was revealed that drying of surfactant-free quantum dot nanofluids in contrast to pure liquids undergoes not three but four evaporation modes including last additional pinning mode when contact angle decreases whilst triple contact line is pinned by the nanocrystals. In contrast to previous studies, it was found out that addition of nanoparticles to aqueous surfactant solutions leads to deterioration of spreading rate and to formation of double coffee ring. For all surfaces examined, superspreading in presence and absence of quantum dot nanoparticles takes place. Despite the formation of coffee rings on all substrates, they have different morphology. Particularly, the knot-like structures are incorporated into the ring on hexamethyldisilazane- and polystyrene-coated surfaces
