Fabrication of superhydrophobic wood surface by a sol–gel process

Wang, Shuliang; Liu, Changyu; Liu, Guochao; Zhang, Ming; Li, Jian; Wang, Chengyu

doi:10.1016/j.apsusc.2011.08.100

Cited by 177 publications

(95 citation statements)

References 28 publications

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“…A low surface energy coating on a surface with a high surface roughness can create a superhydrophobic surface. Extensive studies have been conducted to develop superhydrophobic surfaces on solid wood substrates [17][18][19][20][21][22][23][24]. Many methods have been developed to produce superhydrophobic surfaces on wood substrates, such as the sol-gel process [20], chemical methods [17,23], and deposition methods [22].…”

Section: Coating Protectionmentioning

confidence: 99%

“…A superhydrophobic film on a wood surface, with a water contact angle of 164°and sliding angle of less than 3°, was achieved using the combination of silica nanoparticles, which have a high surface roughness, and a low surface free energy film of perfluoroalkyltriethoxysilanes (POTS). This was performed using a sol-gel process and a POTS reagent fluorination treatment [20]. A water contact angle of 158°and sliding angle of approximately 4°were observed using superhydrophobic, spherical-like α-FeOOH films on wood surfaces.…”

Section: Coating Protectionmentioning

confidence: 99%

See 1 more Smart Citation

Dimensional Stabilization of Wood

Kocaefe

2015

Curr Forestry Rep

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This paper comprehensively reviews the relevant literature and presents the methods and processes used to investigate the dimensional stabilization of wood using various modification techniques, including (a) hydrophobization of wood surfaces to block the entrance and exit of water; (b) impregnation treatment with bulking agents, such as resin and wax, to maintain wood in a swollen state and diminish dimensional changes caused by moisture; (c) chemical treatment with different chemical agents to reduce the hygroscopicity of the wood; and (d) high temperature heat treatment, which modifies wood components, reducing accessible hydroxyl groups and decreasing the possibility of water absorption. The results of dimensionally stabilizing wood via different treatments are interpreted and compared, and the effects of treating conditions and parameters on the dimensional changes of wood are analyzed.

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Section: Coating Protectionmentioning

confidence: 99%

Section: Coating Protectionmentioning

confidence: 99%

Dimensional Stabilization of Wood

Kocaefe

2015

Curr Forestry Rep

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“…In addition, in situ synthesis of inorganic oxides as coatings on wood surfaces developed quickly, and a number of treatment methods have been developed or transitivity applied in this regard. Driven by sol-gel (Wang et al 2011c), sol-dip-coating (Liu et al 2011), layer-by-layer assembly, hydrothermal synthesis (Li et al 2010a;Liu et al 2013b), and chemical vapor deposition ), a variety of functional metal oxide nanometer (e.g., TiO 2 , ZnO, SiO 2 , CaCO 3 , FeOOH, AlOOH) coatings have been fabricated on wood surfaces, possessing the features of UV protection (Yu et al 2010), water resistance , superhydrophobicity (Fu et al 2012b), flame resistance (Sun et al 2010b;Wang et al 2014b), and antibacterial property ). These features significantly improved the utilization performance of wood.…”

Section: Diversified Modification Of Woodmentioning

confidence: 99%

Recent research and development advances of wood science and technology in China: impacts of funding support from National Natural Science Foundation of China

Zhao

2015

Wood Sci Technol

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In the past decades, the field of wood science and technology (WST) in the world has experienced significant changes in response to changes in resources, environments, technologies, and other emerging issues. WST in China is becoming a strong scientific discipline and has had an obvious impact on the global WST research and development (R&D) activities. In this article, a comprehensive review of the recent WST R&D advances in China is presented. Among various contributing factors, the National Natural Science Foundation of China (NSFC), a state funding agency for basic research, has played a critical role in helping to shape up the Chinese R&D activities in the field. NSFC funding information in the WST field from 1988 to 2014, including the number of approved projects, funding level, and supported program categories, was retrieved and analyzed. The positive roles of NSFC in supporting free exploration, cultivating research teams and youth talents, and promoting WST R&D are demonstrated. Hot spots in some focused research areas, key advances in the field, challenges, and future prospect of the Chinese WST development are outlined.

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“…These thin mesoporous coatings have high structural homogeneity and their adhesion can be tailored to different substrates [24,25]. Sol-gel based hydrophobic and water-repellent coatings have been investigated on different plant based materials such as wood [26,27] and cellulosic based materials [28][29][30]. Wood and cellulosic fibres modified with sol-gel material showed significant reduction in flammability and enhanced fireresistance properties.…”

Section: Introductionmentioning

confidence: 99%

Modification of hemp shiv properties using water-repellent sol–gel coatings

Hussain

Calabria-Holley

Jiang

et al. 2018

J Sol-Gel Sci Technol

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For the first time, the hydrophilicity of hemp shiv was modified without the compromise of its hygroscopic properties. This research focused on the use of sol-gel method in preparation of coatings on the natural plant material, hemp shiv, that has growing potential in the construction industry as a thermal insulator. The sol-gel coatings were produced by cohydrolysis and polycondensation of tetraethyl orthosilicate (TEOS) using an acidic catalyst. Methyltriethoxysilane (MTES) was added as the hydrophobic precursor to provide water resistance to the bio-based material. Scanning electron microscopy (SEM) and focused ion beam (FIB) have been used to determine the morphological changes on the surface as well as within the hemp shiv. It was found that the sol-gel coatings caused a reduction in water uptake but did not strongly influence the moisture sorption behaviour of hemp shiv. Fourier transformed infrared (FTIR) spectroscopy shows that the coating layer on hemp shiv acts a shield, thereby lowering peak intensity in the wavelength range 1200-1800 cm −1 . The sol-gel coating affected pore size distribution and cumulative pore volume of the shiv resulting in tailored porosity. The overall porosity of shiv decreased with a refinement in diameter of the larger pores. Thermal analysis was performed using TGA and stability of coated and uncoated hemp shiv have been evaluated. Hemp shiv modified with sol-gel coating can potentially develop sustainable heat insulating composites with better hygrothermal properties. A novel method for modification of hemp shiv using sol-gel technology. Graphical Abstract• Coating layer acts as a breathable membrane allowing the hemp shiv to retain its hygric characteristics.• Hemp shiv coated with sol-gel monolayer reduces its water absorption capacity by 200%.• The effects of sol-gel coating on surface morphology, thermal stability and porosity of the shiv increase with increase in coating thickness.

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Fabrication of superhydrophobic wood surface by a sol–gel process

Cited by 177 publications

References 28 publications

Dimensional Stabilization of Wood

Dimensional Stabilization of Wood

Recent research and development advances of wood science and technology in China: impacts of funding support from National Natural Science Foundation of China

Modification of hemp shiv properties using water-repellent sol–gel coatings

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