Robust Superhydrophobic Surface with Controlled Adhesion: In Situ Growth Depending on Its Bulk Phase Composition and Environment

Abstract

surfaces are almost in situ grown on its bulk phase under special environment in nature. It is still a doubt what influences can the bulk phase composition and external environment make on the structures and properties of in situ growth surface, whether we can fabricate a desired superhydrophobic surface by controlling bulk phase composition and external environment and show a unique idea to synthesize multifunctional surface materials.In situ synthesis is one of the commonly used methods for fabricating superhydrophobic surfaces. [10] In contrast to the general preparation methods, such as roughening the surface of low surface energy materials or modifying the existed rough surface with low surface energy materials, [11] this method tends to be facile and easy to be extensively produced so as to realize practical applications. [12] For instance, Huang et al. reported a superhydrophobic/superoleophilic nanofiber membrane via in situ polymerization on SiO 2 fiber membrane using benzoxazine and Al 2 O 3 nanoparticles. [13] Zhang and co-workers developed a simple in situ method to fabricate a durable superhydrophobic/superoleophilic cellulose/LDH (layered double hydroxide) membrane. [14] Lai et al. reported nanosized graphite blocks with ordered honeycomb structure via in situ grown on 3D copper foam skeleton, the as-obtained coatings had a robust superhydrophobic surface. [15] However, these researches only refer to the hydrophobicity of surfaces, seldom involve the regulation of wetting state, and pay little attention to the influence of bulk phase composition and growth environment on the wettability and wetting state.In this work, by means of an easy reaction model of preparing superhydrophobic surface, the effects of the bulk phase composition and external environment on wettability and wetting state of the in situ growth surfaces were explored, trying to show a unique idea for fabricating the superhydrophobic surface with regulated adhesion by controlling bulk phase composition and external environment. Benzoxazine is a low surface energy substance with the theoretical possibility of preparing superhydrophobic surface. [16] That using fluorine-free benzoxazine as matrix model, selecting different metal chlorides to In nature, the superhydrophobic surfaces are almost in situ grown on its bulk phase under special environment. However, it is still a doubt how the bulk phase composition and external environment influence the structures and properties of in situ growth surfaces. To investigate the influence, a strategy is devised via using fluorine-free benzoxazine as matrix model, selecting different metal chlorides to change the bulk phase composition of the matrix and utilizing different curing media to control the interface growth environment. It is found interestingly that the properties of in situ growth surfaces depend strongly on its bulk phase composition and external environment, and the superhydrophobic surface with controlled adhesion could be synthesized by in situ polymerization through one-step curi...

Fabrication of Micro-/Submicro-/Nanostructured Polypropylene/Graphene Superhydrophobic Surfaces with Extreme Dynamic Pressure Resistance Assisted by Single Hierarchically Porous Anodic Aluminum Oxide Template

“…Thus, wetting stabilities on micro-/nanostructured surfaces are urgently needed to be improved for practical applications. At present, researchers have proposed a variety of methods for the fabrication of hierarchical micro-/nanostructured surfaces with certain wetting stabilities, such as roughening, etching, laser irradiation, photofluidization, photolithography, chemical vapor deposition, self-assembly, and in situ growth . Precise micro-/nanostructure arrays or random patterns fabricated using the aforementioned technologies were achieved on solid surfaces.…”