TY - JOUR
T1 - Surface modification of cellulose nanocrystal and its applications in flame retardant epoxy resin
AU - Suo, Yifan
AU - Gao, Wei
AU - Chen, Zhongwei
AU - Yu, Yuan
AU - Chen, Tingting
AU - Li, Changxin
AU - Zhang, Qingwu
AU - Jiang, Juncheng
N1 - Publisher Copyright:
© 2022 Wiley Periodicals LLC.
PY - 2022/7/20
Y1 - 2022/7/20
N2 - In this work, surface modification of cellulose nanocrystal (CNC) with diphenyl phosphate and Zn(OAc)2·2H2O was prepared by a green method to obtain CNC-based flame retardant CNC@DPP@Zn and then added into epoxy resins (EP). The structure, morphology, and thermal stability of CNC@DPP@Zn were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDS), and thermogravimetric analysis (TG). Flame retardancy and combustion behavior of EP/CNC@DPP@Zn composites were characterized by TG, limiting oxygen index (LOI) test, vertical burning (UL-94) test and cone calorimeter tests (CCT). The results of CCT demonstrated that the peak heat release rate (pHRR), total heat release (THR), and total smoke production (TSP) of EP/8CNC@DPP@Zn composites reduced by 38.3%, 15.5%, and 36.0%, respectively, compared with pure EP. The char residues after CCT were characterized by laser Raman spectroscopy (LRS) and scanning electron microscope (SEM). Finally, the flame retardancy mechanism of CNC@DPP@Zn was proposed.
AB - In this work, surface modification of cellulose nanocrystal (CNC) with diphenyl phosphate and Zn(OAc)2·2H2O was prepared by a green method to obtain CNC-based flame retardant CNC@DPP@Zn and then added into epoxy resins (EP). The structure, morphology, and thermal stability of CNC@DPP@Zn were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDS), and thermogravimetric analysis (TG). Flame retardancy and combustion behavior of EP/CNC@DPP@Zn composites were characterized by TG, limiting oxygen index (LOI) test, vertical burning (UL-94) test and cone calorimeter tests (CCT). The results of CCT demonstrated that the peak heat release rate (pHRR), total heat release (THR), and total smoke production (TSP) of EP/8CNC@DPP@Zn composites reduced by 38.3%, 15.5%, and 36.0%, respectively, compared with pure EP. The char residues after CCT were characterized by laser Raman spectroscopy (LRS) and scanning electron microscope (SEM). Finally, the flame retardancy mechanism of CNC@DPP@Zn was proposed.
KW - flame retardance
KW - thermogravimetric analysis
KW - thermosets
UR - http://www.scopus.com/inward/record.url?scp=85130381779&partnerID=8YFLogxK
U2 - 10.1002/app.52617
DO - 10.1002/app.52617
M3 - 文章
AN - SCOPUS:85130381779
SN - 0021-8995
VL - 139
JO - Journal of Applied Polymer Science
JF - Journal of Applied Polymer Science
IS - 28
M1 - e52617
ER -