THE EFFECT OF NANODISPERSED ADDITIVES ON THE INTUMESCENT COATING DURABILITY
| Jazyk: | ukrajinština |
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| Rok vydání: | 2015 |
| Předmět: | |
| Zdroj: | Вісник НТУУ "КПІ імені Ігоря Сікорського". Серія: Хімічна інженерія, екологія та ресурсозбереження; № 1 (2015); 68-73 Proceedings of the NTUU “Igor Sikorsky KPI”. Series: Chemical engineering, ecology and resource saving; № 1 (2015); 68-73 |
| ISSN: | 2306-1626 |
| Popis: | Вивчено вплив домішок цетилтриметиламоній-монтморилонiту та нанооксиду титану на довговічність інтумесцентного покриття для металевих будівельних конструкцій. Встановлено, що додавання в інту-месцентну систему нанодисперсних речовин подовжує термін експлуатації покриття на три роки. При цьому більш ефективним для вогнезахисту є інтумесцентне покриття, що містить у своєму складі цетилтриметиламонiй-монтморилонiт. The widespread use of polymeric materials in the building industry as a constructional and surfacing materials makes special demands to their fire safety while preserving their mechanical and environmental properties. One of the modern "green" technologies of improving fire safety of polymer is the use of nanopowder substances. The use of nano-sized compounds and nanoclays as functional additives allows to achieve significant improvement in a number of properties of polymeric materials at much lower content of the additives in comparison with classic fillers.In Ukraine in the list of state standards methodology for determining the operation life of the fire protective coatings is absent, so the study used an approach that is set out in European Standard ETAG 018-2.The effect of cetyltrimethylammonium montmorillonite organoclay and nanooxide titanium additives for intumescent coatings durability for metal building constructions was studied. The operation life of intumescent coatings ammonium polyphosphate/pentaerythritol/melamine/ copolymer of ethylene and vinylacetate/titanium oxide with nanooxide titanium or cetyltrimethylammonium montmorillonite was determined by the method of accelerated climatic tests described in ETAG 018-2. The coating durability is 15 years in operation conditions Z2, which is longer than 3 years operating coating without nano-sized compounds. It was shown that the presence of nanodispersed fillers increases the polymer composition fire-protective efficiency. At the same time more effective for fire protection is intumescent coating, which contains in its composition cetyltrimethylammonium montmorillonite. In our view, these results can be explained by that the nanoparticles are involved as cores of char construction frame by chemical interactions with components of intumescent system.IR spectra of intumescent systems indicate of migration of ammonium polyphosphate and pentaerythritol on the surface coating after accelerated climatic tests, and accordingly are leached from the coating in the first place. Nanodispersed fillers presence significantly slows this process.The nano-sized particles can be recommended as efficient additive in development and improvement of fire-protective paints and intumescent materials with enhanced fire-protective, operating and environmental characteristics.Кeywords: nanoclay; nanooxide titanium; fire retardant; a copolymer of ethylene and vinylacetate; intumescent coating durability; fire-protective efficiency |
| Databáze: | OpenAIRE |
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