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Gecko toe pads inspired in situ switchable superhydrophobic shape memory adhesive film.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Wang, Yongzhen Lai, Hua Qing Cheng, Zhongjun Zhang, Haiyang Zhang, Enshuang Lv, Tong Tong Liu, Yuyan Jiang, Lei |
| Copyright Year | 2019 |
| Abstract | Recently, smart adhesive superhydrophobic surfaces have attracted much attention. However, it is still a challenge to obtain a superhydrophobic surface with shape memory adhesive performance. Herein, inspired by the special back-scrolling/unfolding ability of gecko toe pads and corresponding tunable adhesion, we report such a film produced by sticking a layer of superhydrophobic pillar structured polyurethane (s-PU) onto a shape memory polyurethane-cellulose nanofiber (PU-CNF) substrate to mimic the hair-like skin structure and underlying muscle of the gecko toe pads, respectively. Similar to the muscle of the gecko toe pads, the excellent shape memory effect of the PU-CNF substrate can help the obtained film to memorize and repeatedly display different shapes and solid/water contact models. Thus reversible switching between multiple states from the low-adhesive rolling performance to the high-adhesive pinning performance can be realized. Meanwhile, based on its smart wetting performance, not only the traditional in situ capture/release of one microdroplet, but also the step-by-step release of different droplets can be realized on our film. This work reports a new superhydrophobic shape memory adhesive film, which offers a novel strategy for surface adhesion control and meanwhile opens a new road for applications in controlled droplet manipulation. |
| Starting Page | 8984 |
| Ending Page | 8993 |
| Page Count | 10 |
| File Format | PDF HTM / HTML |
| DOI | 10.1039/c9nr00154a |
| PubMed reference number | 31017157 |
| Journal | Medline |
| Volume Number | 11 |
| Issue Number | 18 |
| Alternate Webpage(s) | http://www.rsc.org/suppdata/c9/nr/c9nr00154a/c9nr00154a4.pdf |
| Alternate Webpage(s) | https://doi.org/10.1039/c9nr00154a |
| Journal | Nanoscale |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
