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Mechanism of water adsorption capacity change of bamboo by heating

Änderung des Wasseradsorptionsvermögens von Bambus durch Erhitzen

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Abstract

The water adsorption capacity of moso bamboo (Phyllostachys pubescens) heated at 200 °C in air for various times was examined. The samples were subsequently placed in various humidities at 20 °C to obtain relevant isotherms. They were analyzed using the Hailwood and Horrobin theory, derived for hydrophilic macromolecules, and the Dubinin and Radushkevich theory, previously used to describe the behavior of microporous carbons. The results show that the water adsorption capacities of the samples changed after heating for 2 to 5 hrs, and imply that over this time the number of hydroxyl groups decreased markedly while the number of micropores formed increased.

Zusammenfassung

Untersucht wurde das Wasseradsorptionsvermögen von Mosobambus (Phyllostachys pubescens) nach unterschiedlich langer Wärmebehandlung in heißer Luft bei 200 °C. Die Proben wurden anschließend bei unterschiedlicher Luftfeuchte und 20 °C konditioniert, um die entsprechenden Sorptionsisothermen zu erhalten. Diese wurden anhand der für hydrophile Makromoleküle abgeleiteten Hailwood und Horrobin Theorie sowie der bereits früher zur Beschreibung des Verhaltens mikroporöser Kohlenstoffe verwendeten Theorie von Dubinin und Radushkevich analysiert. Die Ergebnisse ergaben, dass sich das Wasseradsorptionsvermögen der Proben nach einer Wärmebehandlung von 2 bis 5 Stunden geändert hat. Daraus lässt sich schließen, dass in dieser Zeit die Anzahl der Hydroxylgruppen deutlich abgenommen hat und gleichzeitig die Anzahl der sich gebildeten Mikroporen angestiegen ist.

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Authors and Affiliations

  1. Asian Natural Environmental Science Center, The University of Tokyo, Bunkyou-ku Yayoi 1-1-1, 113-8657, Tokyo, Japan

    Yoshimi Ohmae & Masafumi Inoue

  2. Graduate School of Agriculture and Life Sciences, The University of Tokyo, Bunkyou-ku Yayoi 1-1-1, 113-8657, Tokyo, Japan

    Yukie Saito

  3. Laboratory of Biomaterials Design, Division of Forest and Biomaterials Science, Graduate School of Agriculture, Kyoto University, Kita-Shirakawa, 606-8502, Kyoto, Japan

    Takato Nakano

Authors
  1. Yoshimi Ohmae
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  2. Yukie Saito
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  3. Masafumi Inoue
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  4. Takato Nakano
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Correspondence to Takato Nakano.

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Ohmae, Y., Saito, Y., Inoue, M. et al. Mechanism of water adsorption capacity change of bamboo by heating . Eur. J. Wood Prod. 67, 13–18 (2009). https://doi.org/10.1007/s00107-008-0281-1

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  • DOI: https://doi.org/10.1007/s00107-008-0281-1

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