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J Hazard Mater

Title:		Graphitic carbon nitride/phosphorus-rich aluminum phosphinates hybrids as smoke suppressants and flame retardants for polystyrene
Author(s):		Shi Y; Yu B; Duan L; Gui Z; Wang B; Hu Y; Yuen RKK;
Address:		"College of Environment and Resources, Fuzhou University, 2 Xueyuan Road, Fuzhou, 350002, PR China; State Key Laboratory of Fire Science, University of Science and Technology of China, 96 Jinzhai Road, Hefei, 230026, PR China. Electronic address: shiyq1986@fzu.edu.cn. State Key Laboratory of Fire Science, University of Science and Technology of China, 96 Jinzhai Road, Hefei, 230026, PR China; Nanotechnology Centre, Institute of Textiles & Clothing, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong. State Key Laboratory of Fire Science, University of Science and Technology of China, 96 Jinzhai Road, Hefei, 230026, PR China. State Key Laboratory of Fire Science, University of Science and Technology of China, 96 Jinzhai Road, Hefei, 230026, PR China. Electronic address: yuanhu@ustc.edu.cn. Department of Architecture and Civil Engineering, City University of Hong Kong,Tat Chee Avenue, Kowloon, Hong Kong"
Journal Title:		J Hazard Mater
Year:		2017
Volume:		20170306
Issue:
Page Number:		87 - 96
DOI:		10.1016/j.jhazmat.2017.03.006
ISSN/ISBN:		1873-3336 (Electronic) 0304-3894 (Linking)
Abstract:		"Graphitic carbon nitride/organic aluminum hypophosphites (g-C(3)N(4)/OAHPi) hybrids, i.e., CPDCPAHPi and CBPODAHPi, were synthesized by esterification and salification reactions, and then incorporated into polystyrene (PS) to prepare composites through a melt blending method. Structure and morphology characterizations demonstrated the successful synthesis of PDCPAHPi, BPODAHPi and their hybrids. The g-C(3)N(4) protected OAHPi from external heat and thus improved the thermal stability of OAHPi. Combining g-C(3)N(4) with OAHPi contributed to reduction in peak of heat release rate, total heat release and smoke production rate of PS matrix. Reduced smoke released has also been demonstrated by smoke density chamber testing. Additionally, introduction of the hybrids led to decreased release of flammable aromatic compounds. These properties improvement could be attributed to gas phase action and physical barrier effect in condensed phase: phosphorus-containing low-energy radicals generated from OAHPi effectively captured high-energy free-radicals evolved from PS; g-C(3)N(4) nanosheets retarded the permeation of heat and the escape of volatile degradation products. Therefore, g-C(3)N(4)/OAHPi hybrids will provide a potential strategy to reduce the fire hazards of PS"
Keywords:		Composites Flame retardancy Graphitic carbon nitride Smoke suppression;
Notes:		"PubMed-not-MEDLINEShi, Yongqian Yu, Bin Duan, Lijin Gui, Zhou Wang, Bibo Hu, Yuan Yuen, Richard K K eng Netherlands 2017/03/13 J Hazard Mater. 2017 Jun 15; 332:87-96. doi: 10.1016/j.jhazmat.2017.03.006. Epub 2017 Mar 6"