Application Of Oil Sludge Containing Calicium Carbonate In Flame Retardant Ethylene Vinyl Acetate Composites

Based on systematic study about the character of oil sludge and the development of its utilization in the world, combinating with the investigations about using solid waste as flame retardant, oil sludge containing CaCO3 were applied in flame retardant thylene vinyl acetate (EVA) composites. The composition and structure of oil sludge containing CaCO3 were analyzed by EDS, Elemental analysis, ICP-AES and XRD. After that, the flammable properties, smoke generation properties and the thermal degradation mechanism of EVA/OS composites and EVA/OS/Synergisms composites were studied by limiting oxgen index (LOI), cone calorimeter test (CCT), Scanning electron microscope (SEM), smoke density test (SDT) and TG-IR spectrometer (TG-FTIR). Several research outcomes are shown in the following:1 Synergistic flame retardant properities of OS and four kinds of phosphorous compounds were studied. Ammonium poly phosphate (APP), red phosphorus (RP), Nitrogen-phosphorus flame retardant (N-P), Melamine pyrophosphate (MPP) were compounded with OS in the different proportions, and then were made into a composite material combined with EVA. The flame retardant, smoke suppression and thermal degradation performances of the composites were studied. The synergistic flame retardant effects of four kinds of phosphorous compounds were compared. The results showed that the peak of heat release rate (PHRR) of pure EVA is 2016.5 kW/m2, and when 50wt% OS were added, PHRR of EVA/OS composites declined to 450.6 kW/m2. When 5wt%APP was added in, the PHRR of EVA/OS/APP composites was only 284.8 kW/m2; when 3wt%RP was added in, the PHRR of EVA/OS/RP composites was declined to 286.2 kW/m2; when 5wt% N-P was added in, PHRR of EVA/OS/N-P composites was only 318.3 kW/m2; when 5wt%MPP was added in, PHRR of EVA/OS/MPP composites was 389.3 kW/m2. So an appropriate proportion of four kinds of phosphorous compounds can effectively improve the flame retardant, smoke suppression and thermal degradation performances of the composite materials; when adding lwt% four kinds of phosphorous compounds respectively, the flame retardant effects were different, and RP had better synergistic flame retardant proterities in comparison with the other three kinds of phosphorous compounds.2 Synergistic flame retardant properities of OS and carbon black (CB), graphite powder (GP) were studied. CB and GP were compounded with OS in the different proportions, and then were made into a composite material combined with EVA. The flame retardant, smoke suppression and thermal degradation performances of the composites were studied. The results showed that when 3wt%CB was added, the PHRR of EVA/OS/CB composites was 251.1 kW/m2; when 9wt%GP was added in, the PHRR of EVA/OS/GP composites was only 229.8 kW/m2. So an appropriate proportion of CB and GP can effectively improve the flame-retardant, smoke suppression and thermal degradation performances of the composites.3 Synergistic flame retardant properities of OS and fumed silica (SiO2) were studied. SiO2 were compounded with OS in the different proportions, and then were made into a composite material combined with EVA. The experimental results demonstrate that when 5wt% SiO2 was added in, the PHRR of EVA/OS/SiO2 composites was declined into 363.5 kW/m2. So an appropriate proportion of SiO2 can effectively improve the flame retardant, smoke suppression and thermal degradation performances of the composites.4 The study about application of OS containing CaCO3 in flame retardant EVA composites not only provides an efficient way to the utilization of OS, but also confirms that the feasibility of OS as an efficient flame retardant in the EVA material which has advantages of low cost and efficient effects.