TY  - JOUR
PY  - 2017//
TI  - Efficient flame-retardant and smoke-suppression properties of Mg-Al layered double hydroxide nanostructures on wood substrate
JO  - ACS applied materials and interfaces
A1  - Guo, Bingtuo
A1  - Liu, Yongzhuang
A1  - Zhang, Qi
A1  - Wang, Fengqiang
A1  - Wang, Qingwen
A1  - Liu, Yixing
A1  - Li, Jian
A1  - Yu, Haipeng
SP  - 23039
EP  - 23047
VL  - 9
IS  - 27
N2  - 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.<p />  <p>Language: en</p>
LA  - en
SN  - 1944-8244
UR  - http://dx.doi.org/10.1021/acsami.7b06803
ID  - ref1
ER  -