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Preparation of novel biomass humate flame retardants and their flame retardancy in epoxy resin
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2020-07-18 , DOI: 10.1002/app.49601 Guangya Liu 1 , Huili Shi 1 , Chanchal Kumar Kundu 1 , Zhiwei Li 1 , Xiaohong Li 1 , Zhijun Zhang 1
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2020-07-18 , DOI: 10.1002/app.49601 Guangya Liu 1 , Huili Shi 1 , Chanchal Kumar Kundu 1 , Zhiwei Li 1 , Xiaohong Li 1 , Zhijun Zhang 1
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Humic acid (HA), a biomass material with plentiful oxygen‐containing functional groups, showed huge potential to be considered as a promising charring agent in flame retardancy. In this study, this HA was modified with four different metal ions like Fe2+, Mn2+, Al3+, and Cu2+ and finally, introduced into the epoxy resin (EP) to enhance the flame retardancy of the EP and the dispersion of these flame retardants into the EP matrix. When 10 wt% of HA‐Fe and HA‐Mn were incorporated into EP matrix, the limiting oxygen index (LOI) was increased from 21.2% for EP to 26.6 and 25.3% for the EP composites and the peak heat release rate (pHRR) was reduced by 36 and 35.5%, respectively. Such a significant improvement in flame retardancy was attributed to the catalytic charring of HA in the presence of metal ions, which ultimately increased the residual char formation and produced compact char layers during the combustion process to retard the transfer of heat and combustible gases between the EP composites and the flame zone. Finally, this kind of application provided a feasible way for the development of an environmentally friendly flame retardant with high efficiency, which improved the fire safety of EP matrix.
中文翻译：
新型生物质腐植酸盐阻燃剂的制备及其在环氧树脂中的阻燃性
腐殖酸（HA）是一种具有大量含氧官能团的生物质材料，具有巨大的潜力，可被视为阻燃剂中有希望的炭化剂。在本研究中，此HA被Fe 2 +，Mn 2 +，Al 3+和Cu 2+四种不同的金属离子改性最后，将其引入环氧树脂（EP）中以增强EP的阻燃性，并将这些阻燃剂分散到EP基体中。当将10 wt％的HA-Fe和HA-Mn掺入EP基体中时，极限氧指数（LOI）从EP的21.2％增至EP复合材料的26.6和25.3％，以及峰值放热率（pHRR）分别减少了36％和35.5％。阻燃性的显着改善归因于HA在金属离子存在下的催化炭化，最终增加了残留炭的形成并在燃烧过程中产生了致密的炭层，从而阻止了EP之间的热量和可燃气体的传递。复合材料和火焰区。最后，
更新日期：2020-09-20
中文翻译：
新型生物质腐植酸盐阻燃剂的制备及其在环氧树脂中的阻燃性
腐殖酸（HA）是一种具有大量含氧官能团的生物质材料，具有巨大的潜力，可被视为阻燃剂中有希望的炭化剂。在本研究中，此HA被Fe 2 +，Mn 2 +，Al 3+和Cu 2+四种不同的金属离子改性最后，将其引入环氧树脂（EP）中以增强EP的阻燃性，并将这些阻燃剂分散到EP基体中。当将10 wt％的HA-Fe和HA-Mn掺入EP基体中时，极限氧指数（LOI）从EP的21.2％增至EP复合材料的26.6和25.3％，以及峰值放热率（pHRR）分别减少了36％和35.5％。阻燃性的显着改善归因于HA在金属离子存在下的催化炭化，最终增加了残留炭的形成并在燃烧过程中产生了致密的炭层，从而阻止了EP之间的热量和可燃气体的传递。复合材料和火焰区。最后，
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