Cross-species bioinspired in situ reversible triple switchable wettability surface structures and applications for intelligent manipulation of liquid droplets

Abstract

The invention discloses a cross-species biological excitation in situ reversible triple switchable wettability surface structure for intelligent manipulation of droplets. The processing method is as follows: using femtosecond laser direct writing technology to make micropores on polytetrafluoroethylene The array is used as a template; the double-sided tape is stuck on the bottom of the polytetrafluoroethylene template, and the mixture of polydimethylsiloxane, curing agent and carbonyl iron powder is poured into the polytetrafluoroethylene template to form a micro-column array; Silica gel was cast on the polytetrafluoroethylene template, spin-coated, cured, and the polytetrafluoroethylene template was peeled off to obtain a superhydrophobic and high-adhesion surface structure; the femtosecond laser modified the obtained superhydrophobic and high-adhesion surface structure to obtain Cross-species bioinspired in situ reversible triple switchable wettability surface structures for intelligent manipulation of droplets. This wettable surface structure has the superior ability to switch between lotus effect, rice leaf anisotropy and rose petal effect in an in situ reversible manner.

Description

technical field [0001] The invention relates to the technical field of wettability surface structures, in particular to a cross-species bio-inspired in-situ reversible triple switchable wettability surface structure for intelligent manipulation of liquid droplets and its application. Background technique [0002] Existing technologies have made great contributions to human production and life by imitating the surface wettability of specific organisms to achieve specific functions. Such as a single self-cleaning bionic lotus leaf surface, a single anisotropic functional surface imitating rice leaves, and a single functional surface imitating the pinning effect of rose petals. From the perspective of scientific research and practical application, a single structure of this kind greatly limits the development of biomimetic functional surfaces. Therefore, research on cross-species biomimetic surfaces with switchable multiwettability has become the direction of efforts of resear...

AI Technical Summary

Problems solved by technology

First, tunable wettability on superhydrophobic surfaces is always tuned in an ex-situ manner, which greatly limits their applications in certain fields, such as the intelligent manipulation of liquid droplets.

Furthermore, to the best of our knowledge, although some tunable wettability surfaces have been demonstrated, whether by tuning surface chemistry or microstructure, all exhibit dual switchable wettability

It should be emphasized that none of them can achieve triple dynamic switching

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