Premium
Superamphiphobic Porous Structure: Design and Implementation
Author(s) -
Li Fang,
Du Miao,
Xiao Jianliang,
Cao Can,
Xia Xueke,
Xie Jian,
Zhao Xinbing,
Song Yihu,
Zheng Qiang
Publication year - 2019
Publication title -
advanced materials interfaces
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.671
H-Index - 65
ISSN - 2196-7350
DOI - 10.1002/admi.201801973
Subject(s) - microscale chemistry , materials science , porosity , porous medium , graphene , oxide , nanotechnology , nanometre , composite material , water repellent , metallurgy , mathematics education , mathematics
Porous materials with an excellent super‐repellency exist in many applications in life and industry, and their preparation is convenient and cost effective. It would be advantageous to fabricate super‐repellent porous materials. However, because of a lack of understanding of the detailed relationship between structural features and super‐repellency, it is difficult to prepare porous materials with a superamphiphobicity. Based on a theoretical analysis and the discussion of several porous structures' repellant behaviors, the criteria for fabricating super‐repellent porous materials are proposed as: (1) the most appropriate pore size being tens of micrometers to ≈100–200 µm; (2) a larger pore height; (3) a smaller porous‐network thickness; and (4) an appropriate adequate secondary microscopic structure that favors the effective pinning of a gas–liquid–solid three‐phase contact line. According to the four criteria, an optimized superamphiphobic porous material is achieved, which is a dopamine/redox graphene‐oxide‐assembled microscale porous material, which displays a super‐repellency for droplets with a surface tension of 72.8–20 mN m −1 . By using the dopamine/graphene‐assembled microscale porous material, a low gate voltage (500 V) for water impaling is acquired.