In situ synthesis of layered double hydroxides-silicon dioxide hybrids and its flame retardancy in EVA composites

Zhou, Shaojie; Qian, Yi; Chen, Xilei; Li, Long

doi:10.1007/s10973-018-7331-7

Cited by 16 publications

(6 citation statements)

References 42 publications

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“…62 Further, the presence of silica in RHA also played a significant role in enhancing the flame retardant property. 63…”

Section: Limiting Oxygen Index Test (Loi)mentioning

confidence: 99%

Development of waste rice husk/PVC/GO nanocomposite using TA–CaO adduct and ESO as green additives

Dutta

2022

Journal of Thermoplastic Composite Materials

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In this study, a biobased composite utilizing waste rice husk ash (RHA) and polyvinyl chloride in a 1:1 ratio was prepared. The composites were prepared in a solventless, green pathway of melt blending using green additives such as tannic acid-calcium oxide (TA–CaO) adduct as a heat stabilizer and epoxidized soybean oil (ESO) as green compatibilizer. The addition of graphene oxide (GO) nanomaterial into the composite improved the thermal, mechanical, chemical and flame resistance properties of the composite. Composite reinforced with 0.5 phr GO, improved the tensile, flexural and, shore D hardness by 34, 37, 14%, respectively. The homogeneous dispersion of the GO layer in reinforced composite was evident from the transmission electron microscopy (TEM) study. Composites with GO as nano reinforcement showed relatively higher flame retardancy due to the synergistic effect of GO and silicon present in RHA. The composite with 0.5 phr loading of GO showed overall improvement in properties among the composites. It is expected that the incorporation of waste RHA along with other renewable bioresource materials will improve biodegradability and decrease the production cost of the composite.

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“…62 Further, the presence of silica in RHA also played a significant role in enhancing the flame retardant property. 63…”

Section: Limiting Oxygen Index Test (Loi)mentioning

confidence: 99%

Development of waste rice husk/PVC/GO nanocomposite using TA–CaO adduct and ESO as green additives

Dutta

2022

Journal of Thermoplastic Composite Materials

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“…As an important inorganic filler, hydrotalcite can enhance the thermal-insulation effect of the coatings effectively. Hydrotalcite (LDH) is an inorganic material with a layered bimetallic hydroxide structure, which is utilized in various applications [ 17 , 18 , 19 , 20 , 21 , 22 , 23 ]. Its small specific gravity and low thermal conductivity make it suitable for use in barrier-type thermal-insulation coatings.…”

Section: Introductionmentioning

confidence: 99%

Methyl-Trimethoxy-Siloxane-Modified Mg-Al-Layered Hydroxide Filler for Thermal-Insulation Coatings

et al. 2023

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The development of high-performance insulation materials that facilitate the reduction in building energy consumption is of paramount significance. In this study, magnesium–aluminum-layered hydroxide (LDH) was prepared by the classical hydrothermal reaction. By implementing methyl trimethoxy siloxane (MTS), two different MTS-functionalized LDHs were prepared via a one-step in situ hydrothermal synthesis method and a two-step method. Furthermore, using techniques, such as X-ray diffraction, infrared spectroscopy, particle size analysis, and scanning electron microscopy, we evaluated and analyzed the composition, structure, and morphology of the various LDH samples. These LDHs were then employed as inorganic fillers in waterborne coatings, and their thermal-insulation capabilities were tested and compared. It was found that MTS-modified LDH via a one-step in situ hydrothermal synthesis method (M-LDH-2) exhibited the best thermal insulating properties by displaying a thermal-insulation-temperature difference (ΔT) of 25 °C compared with the blank panel. In contrast, the panels coated with unmodified LDH and the MTS-modified LDH via the two-step method exhibited thermal-insulation-temperature difference values of 13.5 °C and 9.5 °C, respectively. Our investigation involved a comprehensive characterization of LDH materials and coating films, unveiling the underlying mechanism of thermal insulation and establishing the correlation between LDH structure and the corresponding insulation performance of the coating. Our findings reveal that the particle size and distribution of LDHs are critical factors in dictating their thermal-insulation capabilities in the coatings. Specifically, we observed that the MTS-modified LDH, prepared via a one-step in situ hydrothermal approach, possessed a larger particle size and wider particle size distribution, resulting in superior thermal-insulation effectiveness. In contrast, the MTS-modified LDH via the two-step method exhibited a smaller particle size and narrow particle size distribution, causing a moderate thermal-insulation effect. This study has significant implications for opening up the potential for LDH-based thermal-insulation coatings. We believe the findings can promote the development of new products and help upgrade industries, while contributing to local economic growth.

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“…However, like most organic polymers, EVA is highly flammable and a large volume of toxic smoke is released without leaving any char residue from EVA in the course of burning cycle 5,9–11 . A reasonable yet well‐accepted approach to solve this problem is to incorporate flame‐retardant additives to improve flame retardancy and anti‐dripping properties of EVA 8,12,13 . In recent years, a wide variety of flame retardant additives have been examined in EVA among which are mineral components (zinc borate, 14–18 magnesium hydroxide, 16,19,20 aluminium hydroxide 16,21,22 ), phosphorus‐based materials (red phosphorus, 23,24 ammonium polyphosphate (APP), 7,22,25–27 nitrogen‐based systems (melamine 28,29 ), and carbon‐based flame retardants (expandable graphite [EG], 30–33 graphene nanoplatelets, 34–36 and graphene oxide 30,37 ).…”

Section: Introductionmentioning

confidence: 99%

Flame retardancy effect of phosphorus graphite nanoplatelets on ethylene‐vinyl acetate copolymer: Physical blending versus chemical modification

Moradkhani

Fasihi

Brison

et al. 2021

Polymers for Advanced Techs

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A novel modified exfoliated graphite nanoplatelets (GNP‐g‐APP), resulting from grafting ammonium polyphosphate (APP) on exfoliated graphite nanoplatelets (GNP) was prepared and evaluated as flame retardant for ethylene‐vinyl acetate copolymer (EVA). The effect of modification on the thermal stability and flame retardancy of EVA was discussed. Thermogravimetric analysis (TGA), UL‐94, pyrolysis combustion flow calorimeter (PCFC), and mass loss calorimeter (MLC) analyses were employed for the evaluation of the thermal stability and flame retardancy of composites. The introduction of 20 wt.% GNP‐g‐APP into EVA resulted in significant enhancement in flame retardant properties with respect to the system containing physical mixture of GNP and APP. The former blend exhibited 57% decrease in the peak of heat release rate (pHRR), and 35% reduction in the total heat release (THR) than the latter one in MLC test. Thus, pHRR was decreased from 940 kW.m−2 for neat EVA to 403 kW.m−2 for EVA containing GNP‐g‐APP. V0 rating (auto‐extinguishable behavior) was also observed in UL 94 chemically modified sample. According to the present study, chemical modification of GNP with APP is more effective than a physical mixing of GNP and APP in improving the flame retardant properties of EVA.

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In situ synthesis of layered double hydroxides-silicon dioxide hybrids and its flame retardancy in EVA composites

Cited by 16 publications

References 42 publications

Development of waste rice husk/PVC/GO nanocomposite using TA–CaO adduct and ESO as green additives

Development of waste rice husk/PVC/GO nanocomposite using TA–CaO adduct and ESO as green additives

Methyl-Trimethoxy-Siloxane-Modified Mg-Al-Layered Hydroxide Filler for Thermal-Insulation Coatings

Flame retardancy effect of phosphorus graphite nanoplatelets on ethylene‐vinyl acetate copolymer: Physical blending versus chemical modification

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