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Enhancement of Fire Retardancy Using Surface-Modified Silica Spheres with Aluminum Hydroxide

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Abstract

Large surface area and fire-inert property of sub-micrometer silica spheres were employed to improve the fire retardant performance by attaching large number of Si–O–Al(OH)\(_{2}\) groups. Various amounts of AlCl\(_{3}\) were attached to the surface of silica spheres and the residual –AlCl\(_{2}\) was hydrolyzed by adding excess amount of KOH. Although the FESEM image of pure silica spheres showed smooth surface, the surface-modified silica spheres exhibited nanoparticles on the surface of silica spheres. The characteristic absorption peaks of Al–OH and Si–O–Al were detected by FTIR spectra. Silica spheres attached with Si–O–Al(OH)\(_{2}\) were uniformly distributed on the surface of cellulose acetate films. The performance of the fire retardant was greatly enhanced by increasing the amount of aluminum hydroxide.

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Correspondence to Kwang-Sun Kang.

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Kong, HS., Kim, BJ. & Kang, KS. Enhancement of Fire Retardancy Using Surface-Modified Silica Spheres with Aluminum Hydroxide. Arab J Sci Eng 42, 4473–4477 (2017). https://doi.org/10.1007/s13369-017-2721-x

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  • DOI: https://doi.org/10.1007/s13369-017-2721-x

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