Engineered partially open-cage fluorinated polyhedral oligomeric silsesquioxane hybrid nanoparticle aggregates for surfaces with super-repellency to widespread liquids

Abstract

From an engineering viewpoint, to form a surface with superrepellency to widespread liquids, the decoration of fluorinated polyhedral oligomeric silsesquioxane (FPOSS) as the lowest surface energy molecule on microparticles or...

Engineering an Almost All-Waterborne System for Transparent yet Superhydrophobic Surfaces with High Liquid Impalement Resistance

“…As reported in our previous works, 5,7 the poc-FPOSS−2OH, consisting of a silicon−oxygen (Si−O) inorganic core with a partially open-cage-liked structure and a fluoroalkyl (with a controlled −CF 3 /−CF 2 chain length, −C 6 F 13 in this work) organic periphery, is an incompletely condensed fluoroalkyl silsesquioxane compound (Figures 1A and S1). Although the poc-FPOSS−2OH has extremely low surface energy (as it involves a FPOSS main body with the lowest surface energy γ s = 9.3 mN m −1 in artificially synthesized molecules 32 ), it is stably dispersible in this almost all-waterborne system and can The almost all-waterborne system with 6.34 wt% ethanol is a slightly milky suspension (Figure 1B) finally composed of 1.12 mM poc-FPOSS−2OH, 1.28 wt% SiNPs, and 1.28 wt% resin precursor, which can be stably stored for > 9 months (actual storage time is still being recorded).…”

“…Superhydrophobic surfaces (SHSs) have emerged as broadly applicable coating materials for antifouling (including self-cleaning, antifogging, and anti-icing), , antibacteria, , corrosion protection, , energy-efficient fluid transport, , water–oil separation, , etc., on account of their powerful repellency to aqueous liquids in terms of contact angles of ≥150° and roll-off angles of ≤10° at solid–gas interfaces. With rising concerns about health and ecology, the SHSs are asked to be fabricated in systems with extremely low and even zero volatile organic compound (VOC)-emission, that is, waterborne systems. − This is because most VOCs, including but not limited to arenes, alkanes, aldehydes, ketones, esters, and terpenoids, are generally deemed as environmentally unfriendly chemicals, which raise health risks (e.g., respiratory, neurological, and dermatologic impairments) and ecological risks (e.g., abnormal growth of plants and photochemical pollution). , As a rule, it seems that waterborne character and superhydrophobicity contradict each other, as low-surface-energy hydrophobic matter is intrinsically hard to dissolve or disperse into an aqueous medium.…”

“…S uperhydrophobic surfaces (SHSs) have emerged as broadly applicable coating materials for antifouling (including self-cleaning, antifogging, and anti-icing), 1,2 antibacteria, 3,4 corrosion protection, 5,6 energy-efficient fluid transport, 7,8 water−oil separation, 9,10 etc., on account of their powerful repellency to aqueous liquids in terms of contact angles of ≥150°and roll-off angles of ≤10°at solid−gas interfaces. With rising concerns about health and ecology, the SHSs are asked to be fabricated in systems with extremely low and even zero volatile organic compound (VOC)-emission, that is, waterborne systems.…”

Magnetic-directed fillers migration during micro-injection molding of magnetic polypropylene nanocomposite surfaces with uplifted light trapping microarchitectures for freezing delay and photothermal-enhanced de-icing

“…Examples include the housing for lightweight electric vehicles, wipers and transport pipes. Natural icing, however, can affect such parts [1][2][3][4][5]. Routinely, thermal and chemical treatments as well as mechanical deicing have been used to resolve icing issues, but they seem relatively costly and inadequate [6][7][8].…”

Strategy toward fluorinated polyhedral oligomeric silsesquioxane wrapping nanoparticles for superomniphobic surfaces

“…7 If a hierarchically micro/nanostructured topography has surface energy at a lower level, the surfaces enable super-repellency to more kinds of liquids, i.e., a broad superomniphobicity spectrum, which would contribute to a longer superomniphobic life and higher superomniphobic strength. 3,8 A lower-surface-energy hierarchically micro/nanostructured topography makes superomniphobic surfaces more efficiently applicable in real cases such as self-cleaning/antifouling, 9 anti-icing, 10 anti-bacteria, 11 corrosion protection, 12 and water-oil separation. 13 Fluorinated polyhedral oligomeric silsesquioxane (FPOSS), consisting of a silicon-oxygen (Si-O) inorganic core (cage-liked structure) and a fluoroalkyl chain (with a controlled -CF 3 /-CF 2 chain length) organic periphery or shell, 14,15 has the lowest surface energy (g s = 9.3 mN m À1 ) in artificially synthesized molecules.…”