Is MWCNT a good synergistic candidate in APP–PER–MEL intumescent coating for steel structure?

Beheshti, Amir; Heris, Saeed Zeinali

doi:10.1016/j.porgcoat.2015.10.023

Cited by 33 publications

(19 citation statements)

References 35 publications

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“…As it is known, peaks appeared for pentaerythritol 3418 cm −1 , 2955 cm −1 , and 1468 cm −1 because of OH stretch, CH stretch, and CH bend in pentaerythritol, respectively. These findings are in line with the related literature . From Figure , all of the peaks can be seen in composite materials and FR additives.…”

Section: Resultssupporting

confidence: 77%

“…Also, thermal degradation of melamine takes place at around 300–370 °C with a single step that produce ammonia (NH 3 ) and carbon dioxide (CO 2 ). These nonflammable gases blow the char that was previously formed by ammonium polyphosphate and pentaerythritol . In our study, ammonium polyphosphate decomposed about 260–516 °C with the producing ammonia and water in the first step.…”

Section: Resultsmentioning

confidence: 99%

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Flame resistant properties of LDPE/PLA blends containing halogen‐free flame retardant

Arslan

Dilsiz

2020

J of Applied Polymer Sci

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In this study, mixing petroleum-based low-density polyethylene (LDPE) with biodegradable poly(lactic acid) (PLA) is used as polymer matrix. Boron compounds, metal hydroxides, melamine (MLM), ammonium polyphosphate (APP), and pentaerythritol (PER) were used as reinforcement materials to improve flame resistance of polymer matrix. The composite materials were characterized by Fourier transform infrared spectroscopy, limiting oxygen index (LOI), thermogravimetric analysis, mechanical test, and scanning electron microscopy analyses. The LOI analysis showed that for samples, which included MLM, APP, and PER, the LOI values were dramatically improved. Especially, the LOI value of sample Q (LDPE80/PLA20/APP30/PER15/MLM15/ZB3) was enhanced about 95.17% compared to polymer mixing.

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Section: Resultssupporting

confidence: 77%

Section: Resultsmentioning

confidence: 99%

Flame resistant properties of LDPE/PLA blends containing halogen‐free flame retardant

Arslan

Dilsiz

2020

J of Applied Polymer Sci

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“…It was reported that MWCNT is negligible or insignificant in intumescent coating, because the anti-oxidation and thermal stability properties of coatings with and without MWCNT remained the same at later stages of the experiment due to degradation of MWCNTs at high temperature. The residual weights of coatings without MWCNT and with a concentration of 0.5 wt.% were almost the same [44]. However, our investigation suggests that a remarkably antagonistic effect exists between graphene and graphite doped APP-PER-PR-based coatings.…”

Section: Discussionmentioning

confidence: 53%

Effect of Graphene on Flame Retardancy of Graphite Doped Intumescent Flame Retardant (IFR) Coatings: Synergy or Antagonism

Wang

Zhao

2019

Coatings

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A comparative study between graphene and modified graphene oxide (mGO) on the flame retardancy of graphite doped intumescent flame retardant (IFR) coatings is preliminarily investigated by cone calorimeter (CC), XRD, and SEM, with the final aim of clarifying the interactions between different graphenes and graphite doped coatings (polyester resin-ammonium polyphosphate-urea-pentaerythritol). The CC results determine that graphene exerts an obviously antagonistic effect on flame resistance, evidenced by the increased peak heat release rate (p-HRR) of 56.9 kW·m−2 for SD8+graphene (sample coating contains graphite with a particle size of 8 μm and 0.5 wt.% graphene as dopant), which increased by 80.6% compared with SD8 (coating contains graphite with a particle size of 8 μm); substitution with graphene or mGO imparts an acceleration of fire growth, because graphene inertness improves the viscosity of melting system, evidenced by the cracked appearance and porous structure of SD8+graphene. However, the higher reactivity of mGO favors the combustion; the barrier effect inhibits the transfer of mass and heat simultaneously, leading to a slight influence on flame retarding efficiency.

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“…However, the poor flame-resistant property of epoxy-based composites severely restricts their applications [4]. Halogen-containing flame retardants are an effective choice to improve the flame retardancy, but they can also cause potential environmental problems by releasing toxic and corrosive gases such as hydrogen halides during combustion [5,6]. Therefore, the development of environmentally-friendly halogen-free flame retardants (HFFRs) has received rapidly growing attention from both academia and industry.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of DOPO-Functionalized MWCNT and Its High Flame-Retardant Performance in Epoxy Nanocomposites

Qiu

et al. 2020

Polymers

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In this work, functionalized multi-walled carbon nanotubes (MWCNT) were synthesized by the reaction between acylated MWCNT and 10-(2,5-dihydroxyphenyl)-9,10-dihydro-9 -oxa-10-phosphaphenanthrene-10-oxide (ODOPB). The obtained MWCNT-ODOPB was well dispersed into epoxy resins together with aluminum diethylphosphinate (AlPi) to form flame-retardant nanocomposites. The epoxy resin nanocomposite with phosphorus content of 1.00 wt % met UL 94 V-0 rating, exhibited LOI value of 39.5, and had a higher T g compared to neat epoxy resin, which indicates its excellent flame retardant performance. These experimental results indicated that MWCNT-ODOPB was a compatible and efficient flame retardant for epoxy resins. Moreover, cone calorimeter analysis showed that the peak heat release rate (pHRR), total heat release (THR) values, and CO 2 production profiles of the composites decreased with an increase in the additional amount of phosphorus. groups onto outside surfaces of carbon nanotubes further diversifies their functions [15][16][17]. For these reasons, functionalized carbon nanotubes with enhanced dispersibility and interfacial interaction in polymers have been applied as group carriers to improve the performance of polymer matrixes [18][19][20].In this study, DOPO-functionalized multi-walled carbon nanotubes (MWCNT) were synthesized by grafting 10-(2,5-dihydroxyphenyl)-9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (ODOPB) onto the outside surfaces of acylated MWCNT. The functionalized MWCNT was used as an additive together with nano-sized aluminum diethylphosphinate (AlPi) to form fire-resistant epoxy resin composites. The ER/AlPi/MWCNT-ODOPB nanocomposites with 1 wt % phosphorus content exhibited the best UL 94 rating (V-0) and an upgraded limiting oxygen index (LOI) value of 39.5. At the same time, the as-prepared composites also showed higher T g values than neat epoxy resin for a good interaction between epoxy chains and MWCNT-ODOPB. Besides, cone calorimeter tests (CCT) were used to study the fire hazards for MWCNT-ODOPB-modified epoxy resins. The results indicated a clear decrease in a peak heat release rate (pHHR) and a total release rate (TRR) with an increase in the phosphorus content. Furthermore, the CO 2 and CO production during related tests also exhibited the same trend.

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Is MWCNT a good synergistic candidate in APP–PER–MEL intumescent coating for steel structure?

Cited by 33 publications

References 35 publications

Flame resistant properties of LDPE/PLA blends containing halogen‐free flame retardant

Flame resistant properties of LDPE/PLA blends containing halogen‐free flame retardant

Effect of Graphene on Flame Retardancy of Graphite Doped Intumescent Flame Retardant (IFR) Coatings: Synergy or Antagonism

Preparation and Characterization of DOPO-Functionalized MWCNT and Its High Flame-Retardant Performance in Epoxy Nanocomposites

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