From bamboo leaf to aerogel: Preparation of water glass as a precursor

Kien Who Kow, Rozita Yusoff, A. R.Abdul Aziz, E. C. Abdullah

Research output: Journal PublicationArticlepeer-review

40 Citations (Scopus)

Abstract

In this study, water glass was synthesized from bamboo leaf as a precursor to produce silica aerogel. Bamboo leaf was combusted to produce bamboo leaf silica (BLS) and reacted with sodium hydroxide to form a water glass solution. The effects of the processing parameters such as the temperature, the time, and the agitation speed on the silica yield in water glass were studied. These processing parameters were optimized based on the regressed correlation to synthesize water glass. It was found that bamboo leaf contains approximately 20 wt.% of silica, which is higher than the silica content in rice husk. Characterizations of BLS confirmed that it has identical purity, amorphicity and chemical nature as rice husk silica. Optimization study also showed that BLS can be completely dissolved in NaOH in at least 2 h at 30 C and an agitation speed of 20 rpm, depending on the combination of the parameters.

Original languageEnglish
Pages (from-to)76-84
Number of pages9
JournalJournal of Non-Crystalline Solids
Volume386
DOIs
Publication statusPublished - 15 Feb 2014
Externally publishedYes

Keywords

  • Bamboo leaf
  • Rice husk
  • Silica aerogel
  • Water glass

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Materials Chemistry

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