Improvement of thermal stability and flame retardancy of polypolypropylene composite modified by ZnO and MoO₃ nanowires

Abstract

Herein, zinc oxide (ZnO) and molybdenum trioxide (MoO3) nanowires were prepared via the hydrothermal method. Then as‐prepared ZnO and MoO3 nanowires were fabricated to form ZnO/MoO3 compound nanostructure. ZnO/MoO3 compounds were incorporated into polypropylene (PP) with various loadings by melt blending. The D‐Optimal mixing design in Design‐Expert software was employed to study the effects of ZnO/MoO3 compound content on flame retardancy and mechanical properties of nanocomposites. Information on performance of thermal stability and flame retardancy of PP/ZnO/MoO3 nanocomposites was obtained through thermogravimetric analysis, cone calorimeter tests, and limiting oxygen index (LOI). The results reflected that the synthesized ZnO/MoO3 compound possessed high thermal stability and flame retardancy. The addition of 15 wt % ZnO nanowires and 13 wt % MoO3 nanowires increased LOI from 18.2 to 23.0%. Meanwhile, the tensile strength of the PP/ZnO/MoO3 nanocomposite decreased by 13.8% and the elongation at break of the PP nanocomposite increased by 20.4% compared with pure PP. Response surface analysis results also indicated that the loading of ZnO/MoO3 compound had an influence on the mechanical properties and flame retardancy of PP. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 48312.

Enhanced dielectric properties, thermal stability and ammonia sensing performance of poly(diphenylamine)/zinc oxide nanocomposites via one step polymerization

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“…They are n‐type semiconductors with a wide energy band gap (3.37 eV) and large exciton binding energy (60 meV). They find applications as attractive chemical‐gas sensors, biomedical applications, UV shielding material, high‐frequency electronic devices, fabrication of semiconductors and so forth 13,18,19 . The gas sensing and biosensing properties of ZnO nanoparticles are ascribed to their higher surface area, high electron transfer ability excellent catalytic efficiency, stability toward chemicals and strong adsorption ability 20…”

Functionalizing MXenes with molybdenum trioxide towards reducing fire hazards of thermoplastic polyurethane

“…Guo et al introduced zinc oxide (ZnO) and MoO 3 nanowires into the PP matrix via the hydrothermal method and found that the limiting oxygen index (LOI) of the PP composite with ZnO and MoO 3 nanowires increased from 18.2% (pure PP) to 23.0%. 25 Xu et al synthesized MoO 3 microrods, nanofibers and nanoplates via hydrothermal and high-temperature calcination methods, and then introduced MoO 3 into the polyurethane elastomer (PUE) to fabricate PUE composites. The results indicated that the PHRR of the PUE/MoO 3 composite was decreased by 61.0% in comparison with that of the pure PUE.…”

Design of super‐tough and antibacterialPPR/nano‐ZnOcomposites based on the excellent dispersion ofZnOparticles

“…As a multifunctional inorganic semiconductor material, 15 nano-ZnO has many functional characteristics, such as electrical properties, wide ultraviolet absorption, high light stability, thermal stability, biocompatibility and biodegradability, which make nano-ZnO can be used in many fields. [16][17][18][19][20] Among these functional characteristics of ZnO, the antibacterial performance is particularly prominent. 21 Of course, many studies showed that the toughening effect of ZnO is also obvious.…”