Table 2 - uploaded by Zulhelmi Alif Abdul Halim
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TGA/DTG data of UP resin and UP composites
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... correlation between these values may influenced by the geometrical complexity of the sample such as particles shape and size, distribution and orientation of the dispersed particles, packing fraction, trapped air within the composite etc. The thermal stabilities of UP resin and its composites were investigated by TGA as shown in Figure 2. Incorporation of silica aerogel has a small effect on thermal stability of the UP resin as can be seen on the initial decomposition temperature (T d,I 10% ) at a 10% mass loss and maximum decomposition temperature (T d,max ) as shown in Table 2. Composite filled with coated aerogel particle, shows lower mass change over temperature (0.51%/°C)) and higher residue content (12.3%) most likely due to the thermal barrier effect of preserved aerogel structure. ...
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Recently, lightweight cork-based materials with excellent thermal stability and flame retardant have attracted great attention. New lightweight cork-based materials with improved thermal stability and flame-retardant characteristics were prepared using facile methods to deepen the application of cork materials in the indoor environment of buildings. In this work, silica aerogel composite corks (CoSiAe-S and CoSiAe-V) were quickly prepared by immersing corks of different tree species in the silica aerogel slurry by respiratory impregnation method. The structure, porosity and thermal stability of the composites were studied using infrared spectroscopy, sorption isotherms and thermogravimetric analytical measurements. The flame retardant and smoke suppression properties of particleboards produced from silica aerogel composite corks were also discussed. Results show that the silica aerogels are fixed in cork cells to form a network of stratified ‘pore inside a pore’ structure. Quercus suber corks (Cor-S) show better thermal stability than Quercus variabilis corks (Cor-V). The silica aerogel treated corks show good thermal stability. The flame retardant and smoke suppression properties of particleboards produced from silica aerogel composite corks (CoSiAe-SP and CoSiAe-VP) are significantly improved. For instance, the total heat release reduced by 26.46 % and 31.33 %, and the total smoke release decreased by 85.60 % and 52.04 %. The physical insulation and adsorption effect of silica aerogels in cork cells are considered to be the reasons for the improved flame retardant and smoke suppression.
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