Construction of hydrophobic core-shell flame retardant: A novel strategy towards reducing fire hazards and reinforcing mechanical properties of polypropylene

Hu, Jie; Hu, Jia-Yan; Chen, Yu-Jie; Tan, Liu; Luo, Qian; Yan, Wen-Juan; Tang, Zhe-Hong; Zhang, Juan-Juan; Wang, Lei; Wang, Nai-Liang; Xu, Sheng

doi:10.1016/j.clay.2024.107297

Cited by 4 publications

(1 citation statement)

References 59 publications

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“…The FTIR spectra of SiO 2 , SiO 2 @Cu 2 O, and SCP are presented in Figure a. For SiO 2 , the peaks observed at 1095 and 806 cm –1 were assigned to the asymmetric and symmetric stretching vibrations of Si–O–Si, − and the peaks at 3435 and 1640 cm –1 were attributed to the stretching vibrations of −OH. − Compared with the infrared absorption spectrum of SiO 2 , a notable absorption peak was visible in the SiO 2 @Cu 2 O FTIR spectrum at 615 cm –1 , corresponding to the shearing vibrational absorption peak of Cu–O. , With regard to SCP, signals at 1440, 1160, 916, and 741 cm –1 were associated with C–N, − PO, − P–N, − and P–C stretching vibrations, respectively. The comprehensive signals of SiO 2 , SiO 2 @Cu 2 O, and SCP provided clear evidence of the successful immobilization of Cu 2 O as well as the phosphorus and nitrogen elements on the surface of SiO 2 .…”

Section: Resultsmentioning

confidence: 99%

Hierarchical Nanospheres toward Flame-Retardant, Mechanically Strong, and Low-Toxicity Epoxy Resins

Rao,

Liu,

Zhao

et al. 2024

ACS Appl. Polym. Mater.

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To endow epoxy resins (EPs) with outstanding flame-retardant and smoke-inhibiting effects, a multifunctional nanoparticle (SCP) has been designed and prepared via a simple approach, wherein Cu 2 O, melamine, and phosphorus-containing flame retardants were successively deposited onto the surface of silica nanospheres. The incorporation of a low addition amount of 2 wt % SCP within the EP demonstrates a significant improvement in flame retardancy. This enhancement is evidenced by a notable increase in the limiting oxygen index to 29.2% and attainment of a V-1 rating in the vertical burning test, in contrast to the respective values of 23.8% and no rating for unmodified EP, respectively. Moreover, the total smoke production, peak of heat release rate, and peak production rate of CO of EP/SCP-2 during the cone calorimeter test decreased by 10.2%, 26.1%, and 37.0%, respectively. Besides, the incorporation of 2 wt % SCP also endows the EP composites with commendable mechanical properties and glass transition temperature (T g ), as evidenced by a 22.5% increase in impact strength, an 8.1% rise in tensile strength, and a 9.5% increase in T g , comparing with the unmodified EP. The flame-retardant mechanism analysis revealed that SCP functions within epoxy resin through both gas-phase and condensed-phase mechanisms. Overall, the proposed multifunctional nanoparticle strategy presents promising approaches for simultaneously enhancing the fire safety and mechanical performance of polymer materials.

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