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j.carbpol.2011.10.036.pdf | 294.29 kB | Adobe PDF | 見る/開く |
タイトル: | Stress relaxation of wood partially non-crystallized using aqueous NaOH solutions |
著者: | Tanimoto, Takashi Nakano, Takato |
著者名の別形: | 中野, 隆人 |
キーワード: | Stress relaxation Relaxation rate X-ray diffraction Crystallinity NaOH solution |
発行日: | Feb-2012 |
出版者: | Elsevier Ltd. |
誌名: | Carbohydrate Polymers |
巻: | 87 |
号: | 3 |
開始ページ: | 2145 |
終了ページ: | 2148 |
抄録: | Wood samples (Picea jezoensis Carr.) were treated with aqueous NaOH solutions (0–0.20 concentration fraction, 12 conditions), and bending tests were performed to measure stress relaxation. The relationship between mechanical properties and NaOH concentration is discussed. The relaxation modulus and relaxation rate were divided into three concentration ranges. Both decreased slightly for NaOH concentrations less than 0.10, decreased drastically for concentrations between 0.11 and 0.14, and decreased slightly for concentrations greater than 0.15. The change in relaxation behavior upon NaOH treatment was due to an increase in molecular chain mobility in non-crystallized regions along the microfibril longitudinal axis in wood as well as lignin swelling. Furthermore, the molecular chain response in this region required time; thus, the dependence of crystallinity on the relaxation rate was apparent in the long time region. |
著作権等: | © 2011 Elsevier Ltd. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。 This is not the published version. Please cite only the published version. |
URI: | http://hdl.handle.net/2433/152368 |
DOI(出版社版): | 10.1016/j.carbpol.2011.10.036 |
出現コレクション: | 学術雑誌掲載論文等 |
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