In this section, you can access to the latest technical information related to the FUTURE project topic.

Uniform Spread of High?Speed Drops on Superhydrophobic Surface by Live?Oligomeric Surfactant Jamming

A water drop with a live?oligomeric surfactant additive exhibits uniform spreading after high speed impact on a superhydrophobic surface. Live?oligomeric surfactant molecules aggregate into dynamic worm?like micelle networks, which jam at the solid?liquid interface by entangling with surface micro/nanostructures to pin the contact line and jam at the spreading periphery to keep the uniform spreading lamellar shape. Inkjet printing of water?based inks on superhydrophobic surfaces is important in high?resolution bioarray detection, chemical analysis, and high?performance electronic circuits and devices. Obtaining uniform spreading of a drop on a superhydrophobic surface is still a challenge. Uniform round drop spreading and high?resolution inkjet printing patterns are demonstrated on superhydrophobic surfaces without splash or rebound after high?speed impacting by introducing live?oligomeric surfactant adhesion. During impact, the live?oligomeric surfactant molecules aggregate into dynamic, wormlike micelle networks, which jam at the solid?liquid interface by entangling with the surface micro/nanostructures to pin the contact line and jam at the spreading periphery to keep the uniform spreading lamellar shape. This efficient uniform spreading of high?speed impact drops opens a promising avenue to control drop impact dynamics and achieve high?resolution printing.

» Author: Siqi Luo, Zhidi Chen, Zhichao Dong, Yaxun Fan, Yao Chen, Bin Liu, Cunlong Yu, Chuxin Li, Haoyu Dai, Haofei Li, Yilin Wang, Lei Jiang

» Reference: doi:10.1002/adma.201904475

» Publication Date: 29/08/2019

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