Synthesis of hydrophobic zinc borate nanoflakes and its effect on flame retardant properties of polyethylene

Li, Shengli; Long, Beihong; Wang, Zichen; Tian, Yumei; Zheng, Yangong; Zhang, Qian

doi:10.1016/j.jssc.2010.02.017

Cited by 50 publications

(24 citation statements)

References 18 publications

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“…Among these, zinc borates with specific physical and chemical properties showing excellent thermal stability are efficiently used as eco‐friendly fire retardant additives and used in many applications such as tribology, smoke and afterglow suppressant, anti‐tracking agent, char promoter, preservative in wood composites . Improved flame retardancy with zinc borate is reported for various polymers; like ethylene vinyl acetate, polyamide‐6, polyethylene, poly(vinyl chloride) . However, utilization of these fillers in epoxy resin is reported only by few researchers.…”

Section: Introductionmentioning

confidence: 99%

Hydrated and anhydrous zinc borate fillers for tuning the flame retardancy of epoxy nanocomposites

Mahajan

Deshpande

Bari

et al. 2020

J of Applied Polymer Sci

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In this study, hydrous (Zn3B6O12·3.5H2O) and anhydrous (ZnB2O4) forms of zinc borates were synthesized at 150 and 175°C under moderate pressure conditions (85 and 150 psi, respectively). Synthesized zinc borates were controllably incorporated (1, 5, and 10 wt%) in epoxy resin to prepare their nanocomposites. The flame‐retardant and mechanical properties of these nanocomposites were determined and compared in terms of their flame spread testing, smoke density, limiting oxygen index, and flexural strength. Superior properties in terms of flame retardancy were observed for epoxy composites containing hydrous filler as compared to anhydrous zinc borates. Although flexural strength was observed to be decreased with increasing filler concentration, the marked drop is lower for composites with hydrous zinc borate as compared to the anhydrous one. The variations in flame‐retardant and mechanical properties of composites with both types of fillers are related to their morphological (field emission scanning electron microscopy), X‐ray diffraction (XRD) analysis, Fourier Transform Infrared (FTIR), differential scanning calorimetry, and thermogravimetry analysis and explained with condensed phase mechanism.

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Section: Introductionmentioning

confidence: 99%

Hydrated and anhydrous zinc borate fillers for tuning the flame retardancy of epoxy nanocomposites

Mahajan

Deshpande

Bari

et al. 2020

J of Applied Polymer Sci

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show abstract

“…Zinc borates have many important uses as ingredients in plastic, rubber, cement, glass, ceramic, electrical insulation, and even medicines. Moreover, zinc borates are employed as preservatives in wood composites, anticorrosive pigments in paint, and polymer additives for the promotion of char formation to suppress smoke and retard combustion [2][3][4]. Zinc borates are also commonly used as host lattices for photo-and thermoluminescent material phosphors as a result of their high thermal and chemical stability, convenient synthesis, and low cost.…”

Section: Introductionmentioning

confidence: 99%

Box–Behnken Experimental Design for Zinc Borate Zn2B6O11•7H2O

Polat¹,

Sayan²

2020

Journal of Boron

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The present study investigated the effect of the operating conditions on the crystallization of zinc borate. For zinc borate crystallization, sodium tetraborate decahydrate and zinc sulfate heptahydrate were used as reactants. In the first part of the study, the crystals were characterized by X-ray diffraction spectroscopy (XRD), Fourier-transform infrared spectroscopy (FTIR), light microscopy, and particle size and thermogravimetric analysis. The results show that the obtained crystals were in the form of Zn 2 B 6 O 11 •7H 2 O, and the operating conditions had a significant effect on the size, morphology, and filtration characteristics of the zinc borate crystals. In the second part of the study, Box-Behnken design (BBD) with response surface methodology (RSM) was employed to determine the optimal operating conditions for zinc borate crystallization. The effects of stirring rate, temperature, and reactant feed rate on the average particle size were investigated. The results show that the data sufficiently fit the second-order polynomial model. The crystallization conditions, including stirring rate, temperature, and reactant feed rate, were studied at 400-500 rpm, 45-85 ºC, and 300-900 mL/h, respectively. The minimum particle size (3.3 µm) was obtained at a stirring rate of 450 rpm, a temperature of 85 ºC, and a reactant feed rate of 300 mL/h.

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“…Zinc borate is a kind of important inorganic material, which can serve as the polymer additives to strengthen their mechanical strength and flame retardants against fire . They can also be used as additives for lubrication and preservatives in wood composites .…”

Section: Introductionmentioning

confidence: 99%

Cyclic Utilization of Zinc Borate Mother Solution via a New Method

Liu

Dong

Nai

et al. 2018

Crystal Research and Technology

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Zinc borate mother solution is cycled to prepare 2ZnO·3B 2 O 3 ·7H 2 O, 3ZnO·5B 2 O 3 ·14H 2 O, and 4ZnO·B 2 O 3 ·H 2 O based on the properties of borate depolymerization. The results show uniform quadrilateral-prism-like and octahedron-like 2ZnO·3B 2 O 3 ·7H 2 O are synthesized at different temperatures. Flake-like 3ZnO·5B 2 O 3 ·14H 2 O is fabricated as reaction time prolonging, and 2ZnO·3B 2 O 3 ·7H 2 O changed into 3ZnO·5B 2 O 3 ·14H 2 O spontaneously. Meanwhile, resulting 2ZnO·3B 2 O 3 ·7H 2 O is investigated to fabricate high aspect ratio of 4ZnO·B 2 O 3 ·H 2 O whisker. Impressively, uniform 4ZnO·B 2 O 3 ·H 2 O whisker can be resynthesized by the filtrates of 2ZnO·3B 2 O 3 ·7H 2 O and 3ZnO·5B 2 O 3 ·14H 2 O via the zero-waste technology.

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Synthesis of hydrophobic zinc borate nanoflakes and its effect on flame retardant properties of polyethylene

Cited by 50 publications

References 18 publications

Hydrated and anhydrous zinc borate fillers for tuning the flame retardancy of epoxy nanocomposites

Hydrated and anhydrous zinc borate fillers for tuning the flame retardancy of epoxy nanocomposites

Box–Behnken Experimental Design for Zinc Borate Zn2B6O11•7H2O

Cyclic Utilization of Zinc Borate Mother Solution via a New Method

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