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Flexible self-supported films were produced from rice hull ash silica extract. Silica was extracted from rice hull ash using 1 N NaOH. This extract was concentrated by volume reduction and adjusted to 3 N NaOH. Concentrated silica extracts in 3 N NaOH solution were used to produce flexible silicate films. XRD analysis showed that silicate existed in an amorphous form in the film. The effect of methyl...
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