Using Pencil Drawing To Pattern Robust Superhydrophobic Surfaces To Control the Mobility of Water Droplets

Wang, Chih-Feng; Wang, Tsai-Fu; Liao, Chih-Siang; Kuo, Shiao‐Wei; Lin, Han-Ching

doi:10.1021/jp204169p

Cited by 47 publications

(24 citation statements)

References 24 publications

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“…Generally, contact angle data are used to estimate the components of surface and interfacial tension . Hydrophobicity of some polybenzoxazine derivatives has been measured using this technique . In our case, we could foresee that the more the intramolecular bonding, the bigger the water contact angles.…”

Section: Synthesis Of Asymmetric Benzoxazine “Dimers”mentioning

confidence: 99%

Understanding the surface properties of polybenzoxazines: Interaction of polybenzoxazine model compounds with metal ions and water

Shen

Liu

Sebastián

et al. 2016

J of Applied Polymer Sci

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The structure of polybenzoxazines (and their properties) is mainly defined by the existence of intra-and intermolecular hydrogen bonds. The effect of different substituents present in the phenolic ring of polybenzoxazines can modulate these intermolecular forces and the interaction with other materials, such as metals. To extend this knowledge, a series of structure-controlled polybenzoxazines and polybenzoxazine model compounds have been synthesized. The interactions with different metal ions have been investigated using UV-vis and NMR analysis. Association constants have been estimated by UV-vis titration method and the effect of the presence of different substituents in the aromatic ring has been established. Water contact angles have also been measured. The different techniques give us information about the inner hydrogen bonding structure. Cyano group, present as substituent in polybenzoxazine compounds, acts as an additional coordination point towards metal ions and water. Our findings should allow modulating the adhesion and other surface properties of the benzoxazine-derived polymers by playing with the properties of the substituents and their structure (phenoxy/phenolic).

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Section: Synthesis Of Asymmetric Benzoxazine “Dimers”mentioning

confidence: 99%

Understanding the surface properties of polybenzoxazines: Interaction of polybenzoxazine model compounds with metal ions and water

Shen

Liu

Sebastián

et al. 2016

J of Applied Polymer Sci

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“…3i would be attributed to the difference in the aggregation states of the islands of nano protrusion EPF/carbon soot particles in the surface. 48 Therefore, the superhydrophobicity of EPF/candle soot particles and EPF/camphor soot particle composites is mainly a consequence of the presence of the islands of branch like nano protrusions and low surface energy additives on the surface. A water droplet with required size does not penetrate into the protruded rough structures, but is rather suspended on the structures, ensuing in heterogeneous surfaces composed of air and solids.…”

Section: B Surface Morphology Of Spray Coated Epf/candle Soot and Epmentioning

confidence: 99%

Thermally Triggered Transition of Superhydrophobic Characteristics of Micro- and Nanotextured Multiscale Rough Surfaces

2015

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In this paper, superhydrophobicity of multiscale hierarchical structures and wettability transition phenomenon of a water droplet on the superhydrophobic surface at different substrate temperature are extensively studied. Spin coating and spray coating methods have been regulated to fabricate EPF (Expanded polystyrene foam)/candle soot and EPF/camphor soot particle composites films. Maximum water contact angle of 165° and roll off angle of 2° were obtained with spray coated EPF/camphor soot composites which demonstrates their superhydrophobicity. By the measurement of water contact angle at different substrate temperature, we have demonstrated the influence of heat energy and pressure developed by micro water droplets during spreading phase. The reduction in water repellence observed on the protrusion induced hierarchical nanostructure is explained by the balancing pressure induced by a droplet of volume 4 µL and work of adhesion. The droplet contact area of hierarchical surfaces was profoundly influenced by change in viscosity of water droplets with temperature. The best performing spray coated EPF/camphor soot particle composite film impressively maintained superhydrophobicity with critical pressure of 200 Pa.The resulting insights can be used to tailor wettability of composite films, control liquid flow patterns for engineering applications such as micro-fluidics and bio-sensing devices.

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“…Polybenzoxazines (PBZs) form a new class of thermosetting phenolic resins that can be prepared through thermal curing polymerization of various BZ monomers, without using a catalyst and without releasing byproducts ( Figure ) . PBZs can possess many attractive features including a high carbon residue, low surface energy, low moisture absorption, good thermal and mechanical properties, excellent dimensional stability, a stable dielectric constant, excellent flame retardancy, and good electrical properties that are not found for other traditional phenolic resins (e.g., phenolic bismaleimides, advanced epoxies) . Nevertheless, PBZs have limited applications at high temperature, because their C–N–C bonds break readily at temperatures above 260 °C .…”

Section: Introductionmentioning

confidence: 99%

Functional Silica and Carbon Nanocomposites Based on Polybenzoxazines

Mohamed

Kuo

2018

Macro Chemistry & Physics

161

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The preparation of organic/inorganic hybrid materials comprising a polybenzoxazine (PBZ) matrix incorporating silicon‐based species (e.g., polydimethylsiloxane [PDMS], layered silicates [clays], and polyhedral oligomeric silsesquioxanes [POSS]) and carbon‐based materials (e.g., carbon black, carbon fibers, carbon nanotubes, and graphene) has received much attention in recent years because these composites display low water absorption, low surface free energy, low dielectric constants, flame‐retardancy, and excellent thermal and mechanical properties. This short review article describes the chemical and physical approaches that are used to prepare PBZs incorporating silica and carbon nanocomposites. In addition, recent reports of their physical properties are discussed, covering their dielectric constants and dynamic mechanical, thermal, electrical, and surface properties.

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Using Pencil Drawing To Pattern Robust Superhydrophobic Surfaces To Control the Mobility of Water Droplets

Cited by 47 publications

References 24 publications

Understanding the surface properties of polybenzoxazines: Interaction of polybenzoxazine model compounds with metal ions and water

Understanding the surface properties of polybenzoxazines: Interaction of polybenzoxazine model compounds with metal ions and water

Thermally Triggered Transition of Superhydrophobic Characteristics of Micro- and Nanotextured Multiscale Rough Surfaces

Functional Silica and Carbon Nanocomposites Based on Polybenzoxazines

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