期刊
ACS APPLIED MATERIALS & INTERFACES
卷 6, 期 7, 页码 5094-5104出版社
AMER CHEMICAL SOC
DOI: 10.1021/am500265a
关键词
inorganic anions; nanocomposites; solvent mixing; thermal stability; flame retardancy; rheology
资金
- Fundamental Research Funds for the Central Universities [BLYJ201402, TD-JC-2013-3]
- Beijing Nova Programme [Z131109000413013]
- Program for New Century Excellent Talents in University [NCET-12-0787]
- National Natural Science Foundation of China [51308045]
- Key Laboratory of Functional Inorganic Material Chemistry (Heilongjiang University)
High-density polyethylene (HDPE) polymer nanocomposites containing Zn2Al-X (X=CO32-, NO3-, Cl-, SO42-) layered double hydroxide (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 a thermo gravimetric analyzer and micro-scale combustion calorimeter. Comparing to neat HDPE, the thermal stability of nanocomposites was significantly enhanced. With the addition of 15 wt 96 Zn2Al-Cl LDH, the 50% weight loss temperature was increased by 67 degrees C. 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%, 41%, 48%, and 54% 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.
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