Facile Preparation of Stable Superhydrophobic Coatings on Wood Surfaces using Silica-Polymer Nanocomposites

Chang, Huanjun; Tu, Kunkun; Wang, Xiaoqing; Liu, Junliang

doi:10.15376/biores.10.2.2585-2596

Cited by 40 publications

(24 citation statements)

References 24 publications

(24 reference statements)

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“…However, wood is susceptible to the absorbance of water and moisture, which renders wood vulnerable to fungi and dimensional instability, strongly reducing the durability and service lifetime [ 9 ]. The addition of superhydrophobic surfaces on a wood substrate has great potential to address these problems and extend the service life of the resulting products [ 10 ].…”

Section: Introductionmentioning

confidence: 99%

Preparation of Stable Superhydrophobic Coatings on Wood Substrate Surfaces via Mussel-Inspired Polydopamine and Electroless Deposition Methods

et al. 2017

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Mussel-inspired polydopamine (PDA) chemistry and electroless deposition approaches were used to prepare stable superhydrophobic coatings on wood surfaces. The as-formed PDA coating on a wood surface exhibited a hierarchical micro/nano roughness structure, and functioned as an "adhesive layer" between the substrate and a metallic film by the metal chelating ability of the catechol moieties on PDA, allowing for the formation of a well-developed micro/nanostructure hierarchical roughness. Additionally, the coating acted as a stable bridge between the substrate and hydrophobic groups. The morphology and chemical components of the prepared superhydrophobic wood surfaces were characterized by scanning electron microscopy (SEM), Fourier transform infrared (FT-IR) spectroscopy, and X-ray photoelectron spectroscopy (XPS). The PDA and octadecylamine (OA) modified surface showed excellent superhydrophobicity with a water contact angle (CA) of about 153 • and a rolling angle (RA) of about 9 • . The CA further increased to about 157 • and RA reduced to about 5 • with the Cu metallization. The superhydrophobic material exhibited outstanding stability in harsh conditions including ultraviolet aging, ultrasonic washing, strong acid-base and organic solvent immersion, and high-temperature water boiling. The results suggested that the PDA/OA layers were good enough to confer robust, degradation-resistant superhydrophobicity on wood substrates. The Cu metallization was likely unnecessary to provide significant improvements in superhydrophobic property. However, due to the amazing adhesive capacity of PDA, the electroless deposition technique may allow for a wide range of potential applications in biomimetic materials.

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Section: Introductionmentioning

confidence: 99%

Preparation of Stable Superhydrophobic Coatings on Wood Substrate Surfaces via Mussel-Inspired Polydopamine and Electroless Deposition Methods

et al. 2017

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“…With the rapid development of colloid and interface science, superhydrophobic materials have gained attention for their potential application in oil/water separation (Xue et al 2014;Chang et al 2015;Wang et al 2015 a;Lu and Hu 2016). Various substrate materials have been used to develop superhydrophobic oil sorbents.…”

Section: Introductionmentioning

confidence: 99%

Facile Fabrication of Superhydrophobic/Superoleophilic Cotton for Highly Efficient Oil/Water Separation

Wang¹,

Yu²,

Chen³

et al. 2016

BioResources

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a This paper presents a facile and versatile strategy to fabricate robust and superhydrophobic/superoleophilic cotton for the removal of oils and organic solvents from polluted water. The superwettability cotton was prepared via in-situ hydrolysis of tetraethoxysilane (TEOS) on the cotton fiber surface using polyvinylpyrrolidone (PVP) as a coupling agent and subsequent hexadecyltrimethoxysilane modification. By simply adjusting the molecular weight of PVP and the concentration of NH3•H2O, the surface roughness of SiO2-modified cotton fibers could be well controlled to generate cotton fibers with excellent superhydrophobicity. The prepared cotton fibers were used as superabsorbents for oil/water separation. It absorbed up to 35 times and 50 times its own weight of nhexane and chloroform, respectively, while repelling water completely. After collecting the absorbed oils via a simple squeezing method, the cotton could be reused for at least 5 cycles. Moreover, the whole procedure was carried out in a mild environment, with no intricate instruments or toxic reagents.

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“…In order to exploit nanotechnology for the development of radically new treatments that could result in large-scale use of nanomaterials in the commercially significant building and construction sector, thorough and comprehensive characterization of promising NPs is needed, as well as an understanding of their distribution into and interaction with the wood structure. 11,15 In order to analyze NPs in a complex matrix, such as wood, extremely sensitive methods capable of detecting NPs with high resolution are required. Depending on the material and the particle size, some NPs can be detected directly while others require additional labeling.…”

Section: ■ Introductionmentioning

confidence: 99%

Distribution of Silica-Coated Silver/Gold Nanostars in Soft- and Hardwood Applying SERS-Based Imaging

et al. 2015

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Nanoparticles (NPs) in aqueous suspension have just begun to be exploited for the preservative treatment of wood. However, at present, there is very little information available on the distribution of NPs in wood after impregnation, due to associated analytical challenges. In this study, we present the detection of model NPs in softwood and hardwood by surface-enhanced Raman spectroscopy (SERS). SERS is a highly sensitive analytical method requiring no fluorescent labeling. The NP distribution after impregnation is evaluated with one representative species of the two wood types. To show the feasibility of the method, we prepared SERS-active Au/Ag nanostars coated with silica to act as a model NP system. We show herein that NPs can be imaged in very low quantities in both wood types without any matrix interactions. The presence of the NPs in the wood was confirmed by scanning electron microscopy (SEM) imaging and energy dispersive X-ray analysis (EDX). The fast detection of NPs in a complex matrix, without complicated sample preparation, marks a huge step forward in the development and application of nanotechnology for wood preservation and the quest to optimize the properties of one of the world's most important raw materials.

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Facile Preparation of Stable Superhydrophobic Coatings on Wood Surfaces using Silica-Polymer Nanocomposites

Cited by 40 publications

References 24 publications

Preparation of Stable Superhydrophobic Coatings on Wood Substrate Surfaces via Mussel-Inspired Polydopamine and Electroless Deposition Methods

Preparation of Stable Superhydrophobic Coatings on Wood Substrate Surfaces via Mussel-Inspired Polydopamine and Electroless Deposition Methods

Facile Fabrication of Superhydrophobic/Superoleophilic Cotton for Highly Efficient Oil/Water Separation

Distribution of Silica-Coated Silver/Gold Nanostars in Soft- and Hardwood Applying SERS-Based Imaging

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