TY - JOUR
T1 - MXene/chitosan nanocoating for flexible polyurethane foam towards remarkable fire hazards reductions
AU - Lin, Bo
AU - Yuen, Anthony Chun Yin
AU - Li, Ao
AU - Zhang, Yang
AU - Chen, Timothy Bo Yuan
AU - Yu, Bin
AU - Lee, Eric Wai Ming
AU - Peng, Shuhua
AU - Yang, Wei
AU - Lu, Hong-Dian
AU - Chan, Qing Nian
AU - Yeoh, Guan Heng
AU - Wang, Chun H.
PY - 2020/1/5
Y1 - 2020/1/5
N2 - MXene/chitosan nanocoating for flexible polyurethane foam (PUF) was prepared via layer-by-layer (LbL) approach. MXene (Ti3C2) ultra-thin nanosheets were obtained through etching process of Ti3AlC2 followed by exfoliation. The deposition of MXene/chitosan nanocoating was conducted by alternatingly immersing the PUF into a chitosan solution and a Ti3C2 aqueous dispersion, which resulted in different number of bilayers (BL) ranging from 2, 5 and 8. Owing to the utilization of ultra-thin Ti3C2 nanosheets, the weight gain was only 6.9% for 8 BL coating of PUF, which minimised the unfavourable impact on the intrinsic properties of PUF. The Ti3C2/chitosan coating significantly reduced the flammability and smoke releases of PUF. Compared with unmodified PUF, the 8 BL coating reduced the peak heat release rate by 57.2%, alongside with a 65.5% reduction in the total heat release. The 8 BL coating also showed outstanding smoke suppression ability with total smoke release decreased by 71.1% and peak smoke production rate reduced by 60.3%, respectively. The peak production of CO and CO2 gases also decreased by 70.8% and 68.6%, respectively. Furthermore, an outstanding char formation performance of 37.2 wt.% residue was obtained for 8 BL coated PUF, indicating the excellent barrier and carbonization property of the hybrid coating.© 2019 Elsevier B.V. All rights reserved.
AB - MXene/chitosan nanocoating for flexible polyurethane foam (PUF) was prepared via layer-by-layer (LbL) approach. MXene (Ti3C2) ultra-thin nanosheets were obtained through etching process of Ti3AlC2 followed by exfoliation. The deposition of MXene/chitosan nanocoating was conducted by alternatingly immersing the PUF into a chitosan solution and a Ti3C2 aqueous dispersion, which resulted in different number of bilayers (BL) ranging from 2, 5 and 8. Owing to the utilization of ultra-thin Ti3C2 nanosheets, the weight gain was only 6.9% for 8 BL coating of PUF, which minimised the unfavourable impact on the intrinsic properties of PUF. The Ti3C2/chitosan coating significantly reduced the flammability and smoke releases of PUF. Compared with unmodified PUF, the 8 BL coating reduced the peak heat release rate by 57.2%, alongside with a 65.5% reduction in the total heat release. The 8 BL coating also showed outstanding smoke suppression ability with total smoke release decreased by 71.1% and peak smoke production rate reduced by 60.3%, respectively. The peak production of CO and CO2 gases also decreased by 70.8% and 68.6%, respectively. Furthermore, an outstanding char formation performance of 37.2 wt.% residue was obtained for 8 BL coated PUF, indicating the excellent barrier and carbonization property of the hybrid coating.© 2019 Elsevier B.V. All rights reserved.
KW - Chitosan
KW - Fire safety
KW - Layer-by-layer deposition
KW - MXene
KW - Nanocoating
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U2 - 10.1016/j.jhazmat.2019.120952
DO - 10.1016/j.jhazmat.2019.120952
M3 - RGC 21 - Publication in refereed journal
C2 - 31400715
SN - 0304-3894
VL - 381
JO - Journal of Hazardous Materials
JF - Journal of Hazardous Materials
M1 - 120952
ER -