Effects of nano-sized boron nitride on thermal decomposition and water resistance behaviour of epoxy-based intumescent coating

Ahmad, Faiz; Zulkurnain, Eza S.B.; Ullah, Sami; Amir, Norlaili

doi:10.1016/j.jaap.2018.03.002

Cited by 31 publications

(15 citation statements)

References 37 publications

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“…TGA results show that formulation IF2‐EG has 8.6% less residual weight than formulation IF1‐APP. During the degradation of IF1‐APP, borophosphate compound formed due to the presence of 11.76 wt% of APP 5.88 wt% of boric acid and increased the residual weight of the char 38 . While IF2‐EG does not show any by‐product in the XRD spectrum which may be due to the absence of APP as confirmed from Figure 6.…”

Section: Resultsmentioning

confidence: 68%

“…During the degradation of IF1-APP, borophosphate compound formed due to the presence of 11.76 wt% of APP 5.88 wt% of boric acid and increased the residual weight of the char. 38 While IF2-EG does not show any by-product in the XRD spectrum which may be due to the absence of APP as confirmed from Figure 6. A comparison of residual weight among the four formulations shows that IF5-APP-EG has the highest residual weight.…”

Section: Functional Groups Analysis Of the Charmentioning

confidence: 65%

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Effect of expandable graphite and ammonium polyphosphate on the thermal degradation and weathering of intumescent fire‐retardant coating

Ullah

Ahmad

Al‐Sehemi

et al. 2020

J of Applied Polymer Sci

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This research aims to study the effect of ammonium polyphosphate and expandable graphite on the intumescent coating formulations (ICF). The coating presented in this research article is based on carbon source expandable graphite (EG), blowing agent melamine, acid source ammonium polyphosphate (APP), epoxy resin as a binder with polyamide amine. The stability of the developed coating was verified at 950°C for 1‐hour fire test. The results showed that the coating is stable and well bond with the steel substrate. The char was characterized by using FESEM, XRD, FTIR, DTA, TGA, XPS, Py‐GCMS and Weathering Test. The morphology of the char was studied by SEM of the coating after furnace fire test. XRD and FTIR show the presence of graphite, borophosphate; boron oxide and sassolite in the residual char. TGA and DTG disclosed that EG improved the residual mass of coating. XPS analysis showed the char residue of IF5‐APP‐EG contains carbon and oxygen contents 47.50 and 40.70, respectively. Py‐GCMS analysis described that the IF5‐APP‐EG released less gaseous compounds. The weathering test illustrated that's the char expansion of coatings samples was decreased due to the presence of a humid environment and UV light. The IF5‐APP‐EG showed the maximum char expansion, lower substrate temperature and high residual weight among the studied formulations.

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Section: Resultsmentioning

confidence: 68%

Section: Functional Groups Analysis Of the Charmentioning

confidence: 65%

Effect of expandable graphite and ammonium polyphosphate on the thermal degradation and weathering of intumescent fire‐retardant coating

Ullah

Ahmad

Al‐Sehemi

et al. 2020

J of Applied Polymer Sci

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“…[6][7][8] The literature suggests that these materials can be helpful to improve the fire resistance of polymeric materials. [9][10][11][12] There are many possible routes for flame retardancy. Currently, researchers are focused on halogen-free intumescent fire retardant to replace halogenated and inorganic flame retardant polymers.…”

Section: Introductionmentioning

confidence: 99%

“…Intumescent coating is designed that its constituents expand when exposed to heat 6–8 . The literature suggests that these materials can be helpful to improve the fire resistance of polymeric materials 9–12 …”

Section: Introductionmentioning

confidence: 99%

Effects of expandable graphite on char morphology and pyrolysis of epoxy based intumescent fire‐retardant coating

Ullah

Ahmad

Al‐Sehemi

et al. 2021

J of Applied Polymer Sci

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The current study was designed to investigate the effects of expandable graphite (EG) on fire protection properties of intumescent fire-retardant coating for steel structures. Several formulations of intumescent coating were prepared and tested according to ISO 834 for char expansion. The chars were found without cracks and bonded with the steel substrate. The results showed that the coating slowly degraded during the test and char remained in contact with vertically tested coated substrate. The coated substrates were also tested for weather resistance using humid and ultraviolet environment. The char was characterized by using FESEM, XRD, FTIR, TGA, and XPS analysis. FESEM examined char morphology of the coatings after furnace fire test. XRD and FTIR showed the presence of graphite, borophosphate; boron oxide and sassolite in the char. TGA and DTGA results disclosed that EG improved the residual mass of coating. XPS analysis showed the percentages of carbon and oxygen are 48.50 and 43.45 in char of formulation with 12.8% EG. The results of weathering test coatings showed decreased in char expansion because of a humidity and UV light. The formulation with 9.8% EG showed the maximum char expansion and high residual mass among the formulations investigated in this study. The weathering tested coated samples showed their capability of fire protection.

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“…Meanwhile, the coating can also be decorative on the wood. Nevertheless, there are some defects to be improved to enhance its heat-shielding performance [17]. For example, the formation of char layer is oxidized with little hindrance over 500 • C and the foam structure of the char layer is loose and uncompacted [18].…”

Section: Introductionmentioning

confidence: 99%

Montmorillonite-Synergized Water-Based Intumescent Flame Retardant Coating for Plywood

Sun

Zhu

et al. 2020

Coatings

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In this study, montmorillonite (MMT) was used as an inorganic synergist to prepare the water-based intumescent flame retardant (IFR) ornamental coating for plywood. Results indicate that the 7 wt.% MMT modified IFR coating (No. 3) possess the best fire resistance (longer than 20 min) of the tested samples according to the fire performance, which significantly declines the specific extinction area by 44.12 m2·kg−1 compared to the coating without MMT by cone calorimeter. In addition, characterizations such as XPS, XRD, TG, SEM and FTIR were characterized to investigate the surface and bulk properties as well as the morphology of MMT synergized water-based IFR coating. It is revealed that the residual nitrogenous polyaromatic structure and 25.5% residual mass in the No. 3 coating are a result of the effect of MMT on the antioxidation properties of the char layer.

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Effects of nano-sized boron nitride on thermal decomposition and water resistance behaviour of epoxy-based intumescent coating

Cited by 31 publications

References 37 publications

Effect of expandable graphite and ammonium polyphosphate on the thermal degradation and weathering of intumescent fire‐retardant coating

Effect of expandable graphite and ammonium polyphosphate on the thermal degradation and weathering of intumescent fire‐retardant coating

Effects of expandable graphite on char morphology and pyrolysis of epoxy based intumescent fire‐retardant coating

Montmorillonite-Synergized Water-Based Intumescent Flame Retardant Coating for Plywood

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