Inorganic Antiflaming Wood Caused by a<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M1"><mml:mtext mathvariant="bold">Ti</mml:mtext><mml:msub><mml:mrow><mml:mtext mathvariant="bold">O</mml:mtext></mml:mrow><mml:mrow><mml:mtext mathvariant="bold">2</mml:mtext></mml:mrow></mml:msub></mml:math>-Decorated ZnO Nanorod Arrays Coating Prepared by a Facile Hydrothermal Method

Zhang, Hong; Zhang, Weigang; Jin, Chunde; Li, Song

doi:10.1155/2016/2358276

Cited by 11 publications

(4 citation statements)

References 44 publications

(44 reference statements)

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“…This MAHRE of Mg–Al LDH-coated wood decreased from 198.2 to 114.5 kW m –2 compared to the untreated sample, suggesting that the presence of Mg–Al LDH coating can indeed diminish the propensity for fire development. The combustion performance between Mg–Al LDH-coated wood and intumescent flame retardants and inorganic flame retardants in the literature (Table ) further indicates that Mg–Al LDH coating performs as well or better than other protective coatings on the market today. − …”

Section: Resultsmentioning

confidence: 93%

Efficient Flame-Retardant and Smoke-Suppression Properties of Mg–Al-Layered Double-Hydroxide Nanostructures on Wood Substrate

Guo

Liu

Zhang

et al. 2017

ACS Appl. Mater. Interfaces

177

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Improving the flame retardancy of wood is an imperative yet highly challenging step in the application of wood in densely populated spaces. In this study, Mg-Al-layered double-hydroxide (LDH) coating was successfully fabricated on a wood substrate to confer flame-retardant and smoke-suppression properties. The chemical compositions and bonding states characterized by energy-dispersive X-ray spectroscopy and X-ray photoelectron spectroscopy confirmed the coating constituents of Mg-Al LDH. The coating evenly covered the sample wood surfaces and provided both mechanical enhancement and flame-retardancy effects. The limiting oxygen index of the Mg-Al LDH-coated wood increased to 39.1% from 18.9% in the untreated wood. CONE calorimetry testing revealed a 58% reduction in total smoke production and a 41% reduction in maximum smoke production ratio in the Mg-Al LDH-coated wood compared to the untreated wood; the peak heat release rate and total heat release were also reduced by 49% and 40%, respectively. The Mg-Al LDH coating is essentially hydrophilic, but simple surface modification by fluoroalkyl silane could make it superhydrophobic, with a water contact angle of 152° and a sliding angle of 8.6°. The results of this study altogether suggest that Mg-Al LDH coating is a feasible and highly effective approach to nanoconstructing wood materials with favorable flame-retardant and smoke-suppression properties.

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Section: Resultsmentioning

confidence: 93%

Efficient Flame-Retardant and Smoke-Suppression Properties of Mg–Al-Layered Double-Hydroxide Nanostructures on Wood Substrate

Guo

Liu

Zhang

et al. 2017

ACS Appl. Mater. Interfaces

177

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“…Due to high catalytic properties, ZnO can significantly replace the role of metal catalysts [17][18][19]. Based on catalytic applications of ZnO, we selected it as a synergist, and we expect that it can show positive effects on flame retardancy of IFR systems [20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Influence of Zinc Oxide Nanoparticles and Char Forming Agent Polymer on Flame Retardancy of Intumescent Flame Retardant Coatings

et al. 2019

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Zinc oxide nanoparticles (ZnO NPs) were synthesized by a precipitation method, and a new charring–foaming agent (CFA) N-ethanolamine triazine-piperazine, melamine polymer (ETPMP) was synthesized via nucleophilic substitution reaction by using cyanuric chloride, ethanolamine, piperazine, and melamine as precursor molecules. FTIR and energy-dispersive X-ray spectroscopy (EDS) studies were employed to characterize and confirm the synthesized ETPMP structure. New intumescent flame retardant epoxy coating compositions were prepared by adding ammonium polyphosphate (APP), ETPMP, and ZnO NPs into an epoxy resin. APP and ETPMP were fixed in a 2:1 w/w ratio and used as an intumescent flame-retardant (IFR) system. ZnO NPs were loaded as a synergistic agent in different amounts into the IFR coating system. The synergistic effects of ZnO NPs on IFR coatings were systematically evaluated by limited oxygen index (LOI) tests, vertical burning tests (UL-94 V), TGA, cone calorimeter tests, and SEM. The obtained results revealed that a small amount of ZnO NPs significantly increased the LOI values of the IFR coating and these coatings had a V-0 ratings in UL-94 V tests. From the TGA data, it is clear that the addition of ZnO NPs could change the thermal degradation behaviors of coatings with increasing char residue percentage at high temperatures. Cone calorimeter data reported that ZnO NPs could decrease the combustion parameters including peak heat release rates (PHRRs), and total heat release (THR) rates. The SEM results showed that ZnO NPs could enhance the strength and the compactness of the intumescent char, which restricted the flow of heat and oxygen.

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“…The growth of ZnO rods in wood scaffolds and surfaces has received a lot of attention recently, due to its various potential applications and the mild reaction conditions employed. It has been shown to provide flame retardancy, , UV resistance, − resistance against biodegradation, , but also interesting wettability properties, such as superhydrophobicity , and superamphiphobicity . Among these properties, the (super)hydrophobic behavior is of particular interest to us.…”

Section: Resultsmentioning

confidence: 99%

Wood Composites with Wettability Patterns Prepared by Controlled and Selective Chemical Modification of a Three-Dimensional Wood Scaffold

Wang

Tian

Cabane

2017

ACS Sustainable Chem. Eng.

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Wood-composite materials with patterned wetting properties were synthesized by applying hydrothermal growth of ZnO rods into a wood scaffold. We exploited the natural morphological features of wood, to selectively modify the wood material via a self-directed deposition of ZnO in the biological scaffold. Characterizations using scanning electron microscopy, energy-dispersive X-ray spectroscopy, and X-ray powder diffraction confirmed the successful surface modification and revealed the predominant growth of ZnO rods on earlywood (EW) regions. The wetting properties of these new wood-composite materials have been extensively investigated to study the influence of the grooved wood surface structure and its chemical heterogeneity on the wettability. We demonstrate that the ZnO–wood samples have alternating hydrophilic and hydrophobic “strips”, corresponding to the EW and latewood grains from the native wood, and that the surfaces are endowed with an interesting anisotropic wetting property. Using these special wetting properties, we further modified ZnO–wood samples with inorganic and organic compounds and we report on basic experiments to show potential applications, in the design of biphasic materials and the control of water droplet movement on surfaces.

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Inorganic Antiflaming Wood Caused by aTiO2-Decorated ZnO Nanorod Arrays Coating Prepared by a Facile Hydrothermal Method

Cited by 11 publications

References 44 publications

Efficient Flame-Retardant and Smoke-Suppression Properties of Mg–Al-Layered Double-Hydroxide Nanostructures on Wood Substrate

Efficient Flame-Retardant and Smoke-Suppression Properties of Mg–Al-Layered Double-Hydroxide Nanostructures on Wood Substrate

Influence of Zinc Oxide Nanoparticles and Char Forming Agent Polymer on Flame Retardancy of Intumescent Flame Retardant Coatings

Wood Composites with Wettability Patterns Prepared by Controlled and Selective Chemical Modification of a Three-Dimensional Wood Scaffold

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