Dynamic Reversible Evolution of Wrinkles on Floating Polymer Films under Magnetic Control
In this paper, we present a simple and versatile method to dynamically and reversibly tailor surface wrinkles on a floating polymer film by combining a magnetic droplet and neodymium magnet. The magnetic force from the attraction of the neodymium magnet to the magnetic droplet is the main reason for...
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doaj-9b7d0a2f58354966a29e0bdb20652d672021-04-23T23:02:32ZengMDPI AGCoatings2079-64122021-04-011149449410.3390/coatings11050494Dynamic Reversible Evolution of Wrinkles on Floating Polymer Films under Magnetic ControlChenchen Jiang0Xue Han1Juanjuan Wang2Lele Li3Enping Liu4Conghua Lu5School of Materials Science and Engineering, Tianjin University, Tianjin 300072, ChinaSchool of Materials Science and Engineering, Tianjin Key Laboratory of Building Green Functional Materials, Tianjin Chengjian University, Tianjin 300384, ChinaSchool of Materials Science and Engineering, Tianjin Key Laboratory of Building Green Functional Materials, Tianjin Chengjian University, Tianjin 300384, ChinaSchool of Materials Science and Engineering, Tianjin University, Tianjin 300072, ChinaSchool of Materials Science and Engineering, Tianjin University, Tianjin 300072, ChinaSchool of Materials Science and Engineering, Tianjin University, Tianjin 300072, ChinaIn this paper, we present a simple and versatile method to dynamically and reversibly tailor surface wrinkles on a floating polymer film by combining a magnetic droplet and neodymium magnet. The magnetic force from the attraction of the neodymium magnet to the magnetic droplet is the main reason for surface instabilities of floating polymer films, which can induce radial stress in the radial direction, and further, compressive stress in the circumferential direction. This compressive stress can trigger not only floating film wrinkling but also a wrinkle-fold transition. Surface morphologies on the floating polymer film have been systematically studied, by varying the distance between the magnetic droplet and neodymium magnet, polymer film thickness, and magnetic droplet volume. With the decrease in the distance between a magnetic droplet and a neodymium magnet, the decrease in polymer film thickness, and the increase in the magnetic droplet volume, the wrinkle numbers increase and even a wrinkle-fold transition happens. Additionally, the coupling effect of multiple magnetic droplets on the floating film has also been used to achieve novel surface wrinkle patterns, which greatly widens the applications of surface wrinkling.https://www.mdpi.com/2079-6412/11/5/494surface wrinklingfloating polymer filmsdynamical reversible wrinklesmagnetic field |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Chenchen Jiang Xue Han Juanjuan Wang Lele Li Enping Liu Conghua Lu |
spellingShingle |
Chenchen Jiang Xue Han Juanjuan Wang Lele Li Enping Liu Conghua Lu Dynamic Reversible Evolution of Wrinkles on Floating Polymer Films under Magnetic Control Coatings surface wrinkling floating polymer films dynamical reversible wrinkles magnetic field |
author_facet |
Chenchen Jiang Xue Han Juanjuan Wang Lele Li Enping Liu Conghua Lu |
author_sort |
Chenchen Jiang |
title |
Dynamic Reversible Evolution of Wrinkles on Floating Polymer Films under Magnetic Control |
title_short |
Dynamic Reversible Evolution of Wrinkles on Floating Polymer Films under Magnetic Control |
title_full |
Dynamic Reversible Evolution of Wrinkles on Floating Polymer Films under Magnetic Control |
title_fullStr |
Dynamic Reversible Evolution of Wrinkles on Floating Polymer Films under Magnetic Control |
title_full_unstemmed |
Dynamic Reversible Evolution of Wrinkles on Floating Polymer Films under Magnetic Control |
title_sort |
dynamic reversible evolution of wrinkles on floating polymer films under magnetic control |
publisher |
MDPI AG |
series |
Coatings |
issn |
2079-6412 |
publishDate |
2021-04-01 |
description |
In this paper, we present a simple and versatile method to dynamically and reversibly tailor surface wrinkles on a floating polymer film by combining a magnetic droplet and neodymium magnet. The magnetic force from the attraction of the neodymium magnet to the magnetic droplet is the main reason for surface instabilities of floating polymer films, which can induce radial stress in the radial direction, and further, compressive stress in the circumferential direction. This compressive stress can trigger not only floating film wrinkling but also a wrinkle-fold transition. Surface morphologies on the floating polymer film have been systematically studied, by varying the distance between the magnetic droplet and neodymium magnet, polymer film thickness, and magnetic droplet volume. With the decrease in the distance between a magnetic droplet and a neodymium magnet, the decrease in polymer film thickness, and the increase in the magnetic droplet volume, the wrinkle numbers increase and even a wrinkle-fold transition happens. Additionally, the coupling effect of multiple magnetic droplets on the floating film has also been used to achieve novel surface wrinkle patterns, which greatly widens the applications of surface wrinkling. |
topic |
surface wrinkling floating polymer films dynamical reversible wrinkles magnetic field |
url |
https://www.mdpi.com/2079-6412/11/5/494 |
work_keys_str_mv |
AT chenchenjiang dynamicreversibleevolutionofwrinklesonfloatingpolymerfilmsundermagneticcontrol AT xuehan dynamicreversibleevolutionofwrinklesonfloatingpolymerfilmsundermagneticcontrol AT juanjuanwang dynamicreversibleevolutionofwrinklesonfloatingpolymerfilmsundermagneticcontrol AT leleli dynamicreversibleevolutionofwrinklesonfloatingpolymerfilmsundermagneticcontrol AT enpingliu dynamicreversibleevolutionofwrinklesonfloatingpolymerfilmsundermagneticcontrol AT conghualu dynamicreversibleevolutionofwrinklesonfloatingpolymerfilmsundermagneticcontrol |
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1721512193926627328 |