TY - JOUR
T1 - Magnetically controlled super-wetting surface switching between ultra-low and ultra-high droplet adhesion
AU - Tian, Limei
AU - Dou, Haixu
AU - Shao, Yanlong
AU - Yi, Yaozhen
AU - Fu, Xue
AU - Zhao, Jie
AU - Fan, Yong
AU - Ming, Weihua
AU - Ren, Luquan
N1 - Publisher Copyright:
© 2022
PY - 2023/1/15
Y1 - 2023/1/15
N2 - Controlled liquid adhesion behaviors on super-wetting surfaces have gained significant attention, however, precise controlling of adhesion behavior is extremely hard to realize due to some inherent limitation in surface chemistry or morphology. Herein, we report a silicone-oil-infused magnetic porous polydimethylsiloxane (SMPP) surface with magnetically tunable super-wetting behaviors. Benefiting from the magnetic-field-responsive structure and interconnected porous characteristics, the SMPP can use magnetic field to control the seepage and absorption of silicone oil in the micropore channels, thereby precisely changing the adhesion of the water droplets on the surface. Compared to conventional super-wetting surfaces, this SMPP surface displays reversible in-situ conversion from ultra-high to ultra-low droplet adhesion with sliding angles ranging from 3° to 180° that hold up well even after severe cutting or abrasion. We also demonstrated that this tunable adhesion behavior can be used not only to enhance droplet manipulation in spatiotemporal but also to design unique microfluidic microreactors and antigravity transport devices. We envision that this proof-in-concept surface can serve as an important component of integrated control systems for intelligent manipulators, biochemical reactions, fluid transport, and biomedical analysis.
AB - Controlled liquid adhesion behaviors on super-wetting surfaces have gained significant attention, however, precise controlling of adhesion behavior is extremely hard to realize due to some inherent limitation in surface chemistry or morphology. Herein, we report a silicone-oil-infused magnetic porous polydimethylsiloxane (SMPP) surface with magnetically tunable super-wetting behaviors. Benefiting from the magnetic-field-responsive structure and interconnected porous characteristics, the SMPP can use magnetic field to control the seepage and absorption of silicone oil in the micropore channels, thereby precisely changing the adhesion of the water droplets on the surface. Compared to conventional super-wetting surfaces, this SMPP surface displays reversible in-situ conversion from ultra-high to ultra-low droplet adhesion with sliding angles ranging from 3° to 180° that hold up well even after severe cutting or abrasion. We also demonstrated that this tunable adhesion behavior can be used not only to enhance droplet manipulation in spatiotemporal but also to design unique microfluidic microreactors and antigravity transport devices. We envision that this proof-in-concept surface can serve as an important component of integrated control systems for intelligent manipulators, biochemical reactions, fluid transport, and biomedical analysis.
KW - Magnetic response
KW - Microdroplet manipulation
KW - Robustness
KW - Tunable adhesion
UR - http://www.scopus.com/inward/record.url?scp=85144889751&partnerID=8YFLogxK
U2 - 10.1016/j.cej.2022.141093
DO - 10.1016/j.cej.2022.141093
M3 - Article
AN - SCOPUS:85144889751
SN - 1385-8947
VL - 456
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
M1 - 141093
ER -