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Rapid Commun."],"published-print":{"date-parts":[[2023,6]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Two kinds of polyaniline coupled graphitized carbon nitride nanosheets doped with different organic phosphoric acids (CP@PA, with phytic acid; CP@NP, with amino trimethyl phosphonic acid) are developed by in\u2010situ polymerization. According to the analysis of the section morphology and element distribution of epoxy resin (EP) composites, although CP@PA and CP@NP show completely different morphology, they can significantly enhance the dispersion of graphitized carbon nitride nanosheets in EP. Moreover, the different oxidation states of phosphorus contained in the CP@PA and CP@NP lead to varying effects on the fire safety of EP. The flame retardancy Index (FRI) is a dimensionless index to evaluate the performance of flame retardants. When used as a flame retardant, CP@NP (FRI = 3.22) is better than CP@PA (FRI = 1.29) in flame retardant, especially in suppressing thermal hazards. As a synergist of intumescent flame retardants (IFR), CP@PA (FRI = 26.12) is most effective in improving the comprehensive fire safety property of EP and achieves an \u201cExcellent\u201d rating. Therefore, two different flame\u2010retardant mechanisms of CP@PA and CP@NP are summarized by analyzing the combustion behavior and changes of condensed phase. In summary, this research may be helpful to the design of nano synergies for IFR systems.<\/jats:p>","DOI":"10.1002\/marc.202300071","type":"journal-article","created":{"date-parts":[[2023,4,21]],"date-time":"2023-04-21T09:43:51Z","timestamp":1682070231000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":12,"title":["Organic Phosphoric Acid Doped Polyaniline\u2010Coupled g\u2010C<sub>3<\/sub>N<sub>4<\/sub> for Enhancing Fire Safety of Intumescent Flame\u2010Retardant Epoxy Resin"],"prefix":"10.1002","volume":"44","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5037-0275","authenticated-orcid":false,"given":"Xilei","family":"Chen","sequence":"first","affiliation":[{"name":"College of Environment and Safety Engineering Qingdao University of Science and Technology  Qingdao Shandong 266042 P. R. 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