Biomass Chitosan-Induced Fe3O4 Functionalized Halloysite Nanotube Composites: Preparation, Characterization and Flame-Retardant Performance

Mengmeng Zhang; Yamin Cheng; Zhiwei Li; Xiaohong Li; Laigui Yu; Zhijun Zhang

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자료유형: 학술저널

저자정보: Mengmeng Zhang (Henan University) Yamin Cheng (Henan University) Zhiwei Li (Henan University) Xiaohong Li (Henan University) Laigui Yu (Henan University) Zhijun Zhang (Henan University)

저널정보: 성균관대학교 성균나노과학기술원 NANO NANO Vol.14 No.12

발행연도: 2019.1

수록면: 127 - 141 (15page)

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An inorganic–organic nanohybrid flame retardant, HNT@CS@Fe3O4, is prepared by Halloysite nanotubes (HNT) as nanotemplate, chitosan (CS) as char-forming agent and ferroferric oxide (Fe3O4) playing in a catalytic role, aiming to endow enhanced flame-retardant performance of its nanohybrid. Results show that HNT@CS@Fe3O4 nanohybrids have a corn-like structure and can significantly improve the flame retardancy and thermal stability of epoxy resin (EP). Especially, the initial thermal degradation temperature of EP/HNT@CS@Fe3O4 is significantly improved by 24 ℃ relative to pure EP, and the residual carbon yield under air atmosphere is 8.8 wt.%, which is significantly higher than other EP composites, indicating a higher thermal stability is offered by the as-prepared nanohybrid. The limiting oxygen index of EP/10HNT@CS@Fe3O4 is 31.3%, which is 10.2% higher than that of pure EP. Meanwhile, the HNT@CS@Fe3O4 nanofiller reduces the peak heat release rate, CO production and peak smoke production release of EP nanocomposite by 32.0%, 44.0% and 33.0% in a cone calorimeter test, respectively. This is because the HNT-based composite can form a three-dimensional network structure into the EP matrix to inhibit heat release and diffusion of flammable moieties upon burning of EP. In the meantime, the incorporated Fe3O4 nanoparticle can in situ catalyze the charring of CS and EP matrix on the surface of HNT during the combustion process, which also contributes to the significantly increased fire safety of EP.

#Halloysite nanotubes #chitosan #ferroferric oxide #epoxy resin #flame retardants

참고문헌 (46)

참고문헌 신청

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H. Gu / 2016 / J. Mater. Chem. C 4:5890

P. Mohan / 2013 / Polym. Plast. Technol. Eng 52:107

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