Self-assembly followed by radical polymerization of ionic liquid for interfacial engineering of black phosphorus nanosheets: Enhancing flame retardancy, toxic gas suppression and mechanical performance of polyurethane

Cai, Wei; Hu, Yixin; Pan, Ying; Zhou, Xia; Chu, Fukai; Han, Longfei; Mu, Xiaowei; Zhuang, Zeyuan; Wang, Xin; Xing, Weiyi

doi:10.1016/j.jcis.2019.11.114

Cited by 94 publications

(38 citation statements)

References 48 publications

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“…For P2p spectra, bands at around 132.7, 134.3, and 135.1 eV can be assigned to P–C, P–O, and P=O groups, respectively. 45 As shown in the spectrum of Si2p, the band at 103.4 eV can be assigned to Si–P, while the peak at 104 eV can be attributed to Si–O. 46 These results show that more phosphate and silicate structures are formed in the residual char of HNTPC/EP, meaning superior condensed phase flame-retardant effect of phosphorus and silicon.…”

Section: Resultsmentioning

confidence: 88%

Synthesis of multielement phosphazene derivative and the study on flame-retardant properties of epoxy resin

Wang

Yang

Guo

et al. 2020

High Performance Polymers

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Herein, we have successfully synthesized phosphorus/nitrogen/silicon tri-elements compound phosphazene derivative hexa-[4-( N-(3-(triethoxysilyl)propyl)acetamide)phenoxy]cyclotriphosphazene (HNTPC) from hexachlorotriphosphazenitrile, methyl 4-hydroxybenzoate, and 3-triethoxysilylpropylamine, and it was used as an additive flame retardant in epoxy resin (EP). Then, the thermal stability and flame retardancy of the composite (HNTPC/EP) were tested. Thermogravimetric analysis showed that the presence of HNTPC made EP matrix decompose at a relatively low temperature, thus promoted the formation of a stable coke layer and protected the matrix from fire. Therefore, the amount of carbon residue was markedly increased at 800°C, indicating an outstanding condensed phase flame-retardant effect. Furthermore, various combustion test data manifested that the addition of HNTPC could significantly improve the flame-retardant performance of EP. In addition, the sample could pass the vertical burning tests (UL-94) V-1 grade when the addition amount was 10% and the limiting oxygen index value was 32.6%, the peak heat release rate and total heat release rate decreased by 40.0% and 21.5%, respectively. Besides, the results of scanning electron microscopy, Raman spectroscopy, and X-ray photoelectron spectroscopy also showed that HNTPC can promote the formation of carbon layer and improved the flame-retardant property of EP. Finally, the condensed phase and gas phase synergistic flame-retardant mechanism of HNTPC was proposed.

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Section: Resultsmentioning

confidence: 88%

Synthesis of multielement phosphazene derivative and the study on flame-retardant properties of epoxy resin

Wang

Yang

Guo

et al. 2020

High Performance Polymers

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“…The spectrum usually exhibited two strong overlapping diffusions which appeared at 1580 cm −1 (G band) and 1360 cm −1 (D band), respectively. The graphitization degree of the char residues was evaluated by the ratio of integral intensity of D and G bands recorded as I D / I G. 39 The lower I D / I G value meant that the char possessed higher graphitization degree 40‐42 . As presented in Figure 8, the I D / I G value of UPR/MVDOS‐18 was 2.59, which was lower than 3.01 of neat UPR, illustrating the MVDOS promoted the graphitization of UPR.…”

Section: Resultsmentioning

confidence: 98%

A novel P‐S‐Si‐based cage‐structural monomer for flame‐retardant modification of unsaturated polyester resin

Zhang

Song

et al. 2020

Polymers for Advanced Techs

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Currently, the issue of improving the flame‐retardant performance of unsaturated polyester resin (UPR) has drawn a lot of attention. In this study, methyl vinyl di (1‐thio‐2,6,7‐trioxal‐1‐phosphabicyclo [2.2] octane‐4‐methoxy) silane (MVDOS) with P‐N‐Si‐based cage unit was synthesized, and it was utilized as a reactive flame‐retardant monomer to modify UPR. The UPR/MVDOS composites were prepared by introducing different ratios of MVDOS into UPR via the reaction of crosslink. The efficiency of the resulted composites was investigated by using the limiting oxygen index (LOI), vertical burning test, and cone calorimeter test. The results showed that the composites reached the V‐0 rate without dripping, and the LOI value was 29.1% when the content of MVDOS was as low as 18 wt%. Cone calorimeter tests revealed the peak of heat release and CO production of UPR/MVDOS‐18 were 238.2 KW/m2 and 0.0167 g/s, which were respectively lower than the ones of neat UPR. The introduction of MVDOS also increased the stability of UPR composites. Furthermore, the scattering electron microscopy, laser Raman spectroscopy, and X‐ray photoelectron spectroscopy studies revealed that the incorporation of MVDOS stimulated the UPR matrix to generate char layer with increased graphitization degree, which provided a good barrier to prevent heat and oxygen from being transferred and then protected the materials inside from further burning. This research provides a new way to obtain flame‐retardant UPR composites with high performance.

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“…This can be explained by a proposed pyrolysis process that the weight loss at lower temperature was mostly attributed to carbonization of polymer chains which forms char residues. Cone calorimeter is an effective measurement of combustion property for most materials [32,33], including textiles [34]. Combustion property of cotton and ramie fabrics was measured by a cone calorimeter ( Figure 5).…”

Section: Thermal Conductivitymentioning

confidence: 99%

“…Cone calorimeter is an effective measurement of combustion property for most materials [32,33], including textiles [34]. Combustion property of cotton and ramie fabrics was measured by a cone calorimeter ( Figure 5).…”

Section: Thermal Stability and Combustion Propertiesmentioning

confidence: 99%

Comprehensive Property Investigation of Mold Inhibitor Treated Raw Cotton and Ramie Fabric

et al. 2020

Self Cite

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At present, research rarely focuses on side effects of the use of mold inhibitors on raw cotton and ramie fabric. Four different mold inhibitors (dimethyl fumarate (DMF), ethyl p-hydroxybenzoate (EHB), propyl p-hydroxybenzoate (PHB), and calcium sorbate (CS)) were used to treat raw cotton and ramie fabric through a dipping method. The optical properties, wettability, thermal conductivity, thermal stability, and combustion properties of treated cotton and ramie samples have been investigated. The reflectance of UV light was improved by the addition of mold inhibitors. In addition, the presence of EHB, PHB, and CS improved the wettability of raw cotton and ramie fabric. It was found that thermal conductivity was slightly increased, influencing the heat insulation effect of the fabrics. Since the additives are flammable, the presence of DMF, EHB, and PHB caused an increase in pHRR and THR for combustion of cotton samples. This addition of CS caused a decrease in pHRR and THR of cotton due to the flame retardancy of CS. This comprehensive investigation of the properties of raw cotton and ramie fabrics treated with these materials should provide a basis for the choice of mold inhibitors.

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Self-assembly followed by radical polymerization of ionic liquid for interfacial engineering of black phosphorus nanosheets: Enhancing flame retardancy, toxic gas suppression and mechanical performance of polyurethane

Cited by 94 publications

References 48 publications

Synthesis of multielement phosphazene derivative and the study on flame-retardant properties of epoxy resin

Synthesis of multielement phosphazene derivative and the study on flame-retardant properties of epoxy resin

A novel P‐S‐Si‐based cage‐structural monomer for flame‐retardant modification of unsaturated polyester resin

Comprehensive Property Investigation of Mold Inhibitor Treated Raw Cotton and Ramie Fabric

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