Effect of microencapsulated ammonium polyphosphate on the durability and fire resistance of waterborne intumescent fire-retardant coatings / Zhitian Liu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 1 (01/2019)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 16, N° 1 (01/2019) . - p. 135-145 Titre : Effect of microencapsulated ammonium polyphosphate on the durability and fire resistance of waterborne intumescent fire-retardant coatings Type de document : texte imprimé Auteurs : Zhitian Liu, Auteur ; Mengqin Dai, Auteur ; Qinghua Hu ; Shi Liu ; Xiang Gao ; Fan Ren ; Qi Zhang Année de publication : 2019 Article en page(s) : p. 135-145 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Durée de vie (Ingénierie) Encapsulation Ignifugeants Composé chimique utilisé pour réduire l'inflammabilité. Il peut être incorporé au produit durant sa fabrication ou appliqué ultérieurement à sa surface. Polyphosphate d'ammonium Revêtements en phase aqueuse -- Additifs Index. décimale : 667.9 Revêtements et enduits Résumé : Large-scale addition of hydrophilic solid filler (i.e., ammonium polyphosphate) into waterborne intumescent fire-retardant coatings can cause many problems such as poor compatibility, easy absorption of moisture, and poor durability. In this work, microencapsulated ammonium polyphosphate with melamine formaldehyde resin (MFAPP) was prepared and applied in intumescent fire-retardant coatings to solve the problems mentioned. Due to the hydrophobicity of melamine formaldehyde (MF) resin, MFAPP exhibited better water resistance, thermal stability, and compatibility with polymer matrix, which was confirmed by Fourier transform infrared spectra, scanning electron microscopy (SEM), particle size test, water solubility, water contact angle, and thermogravimetric analysis (TGA). The effect of the MFAPP on durability and fire resistance of the fire-retardant coatings test were investigated by the static immersion test, fire resistance test, TGA, and SEM. Even immersed in distilled water for 12 h, the coatings containing MFAPP did not show obvious damage, indicating microencapsulation improved the water resistance of coatings. Furthermore, the fire-resistant time and thermal stability of the waterborne intumescent fire-retardant coatings were also improved remarkably by utilizing the microencapsulation of ammonium polyphosphate. Note de contenu : - EXPERIMENTAL : Materials - Preparation of samples - Fourier transform infrared (FTIR) spectra - The particle size and distribution of MFAPP and APP - Scanning electron microscopy (SEM) - Solubility in water of MFAPP and APP - Contact angle analysis - The static immersion test - Fire resistance test - Thermogravimetric analysis (TGA) - RESULTS AND DISCUSSION : Characterization of MFAPP - Fire resistance of the coatings - Thermal properties of MFAPP and fire-retardant coating containing MFAPP - Hydrophobicity of MFAPP and coating - Fire protection and thermal properties of coatings after the static immersion test - Table 1 : The formulation of the intumescent fire-retardant coatings DOI : 10.1007/s11998-018-0108-x En ligne : https://link.springer.com/article/10.1007/s11998-018-0108-x Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31977 [article]

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