Citation

Gao Y, Wang J, Huang L, Yan X, Zhang X, Xing Z, Guo Z, Wang Q, He Q. ACS Appl. Mater. Interfaces 2014; 6(7): 5094-5104.

Copyright

(Copyright © 2014, American Chemical Society)

DOI

10.1021/am500265a

PMID

24597470

Abstract

High-density polyethylene (HDPE) polymer nanocomposites containing Zn2Al-X (X= CO32-, NO3-, Cl-, SO42-) LDH nanoparticles with different loadings from 10 to 40 wt% were synthesized using a modified solvent mixing method. Synthesized LDH nanofillers and the corresponding nanocomposites were carefully characterized using X-ray diffraction, scanning electron microscopy, and transmission electron microscopy, etc. The thermal stability and flame retardancy behavior were investigated using thermo gravimetric analyzer and microscale combustion calorimetry. Comparing to neat HDPE, the thermal stability of nanocomposites was significantly enhanced. With the addition of 15 wt% Zn2Al-Cl LDH, the 50% weight loss temperature was increased by 67 oC. After adding LDHs, the flame retardant performance was significantly improved as well. With 40 wt% of LDH loading, the peak heat release rate was reduced by 24.4%, 40.9%, 48% and 53.6% for HDPE/Zn2Al-Cl, HDPE/Zn2Al-CO3, HDPE/Zn2Al-NO3, and HDPE/Zn2Al-SO4, respectively. We also noticed that different interlayer anions could result in different rheological properties and the influence on storage and loss moduli follows the order of SO42- > NO3- > CO32- > Cl-. Another important finding of this work is that the influence of anions on flame retardancy follows the exact same order on rheological properties.

Language: en