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  1. 紀要論文
  2. 琉球大学農学部学術報告
  3. 31号
  1. 部局別インデックス
  2. 農学部

CMC の非ニュートン流動と動的粘弾性(農芸化学科)

http://hdl.handle.net/20.500.12000/3964
http://hdl.handle.net/20.500.12000/3964
2205d279-c91e-4431-8710-4e7ddfba2cfd
名前 / ファイル ライセンス アクション
KJ00000162204.pdf KJ00000162204.pdf
Item type デフォルトアイテムタイプ(フル)(1)
公開日 2008-02-14
タイトル
タイトル CMC の非ニュートン流動と動的粘弾性(農芸化学科)
言語 ja
作成者 田幸, 正邦

× 田幸, 正邦

ja 田幸, 正邦

仲村, 実久

× 仲村, 実久

ja 仲村, 実久

Tako, Masakuni

× Tako, Masakuni

en Tako, Masakuni

Nakamura, Sanehisa

× Nakamura, Sanehisa

en Nakamura, Sanehisa

アクセス権
アクセス権 open access
アクセス権URI http://purl.org/coar/access_right/c_abf2
内容記述
内容記述タイプ Other
内容記述 CMC, 分子量120,000,置換度0.80,の水溶液は1.5および2.0%濃度で塑性流動性を示し, それぞれの降伏値は6および10dyne/cm^2であった。流動指数は1.0%までは1.0,1.5および2.0%では屈折点前で1.1,後で1.6であった。ずり速度に対する屈折点の位置がキサンタンガムのそれらと一致した。動的粘弾性は2.0%で急激な増大が見られ, tanδは周波数に関係なくほぼ一定(1.8)であった。CMCのこのようなレオロジー特性は分子主鎖が部分的に会合していることによるものであることが認められた。
内容記述タイプ Other
内容記述 Non-Newtonian flow behavior and dynamic viscoelasticity of carboxymethylcellulose (CMC) solutions were measured using a rheogoniometer and their rheological properties were analyzed. Aqueous solutions of CMC at concentrations of 0.5 and 1.0% showed pseudoplastic behavior and those of 1.5 and 2.0% showed plastic behavior. The flow indices of the former were 1.0 and the latter were 1.1 before refraction point and 1.6 after it. The situation of the refraction points for shear rate were consistent with that of xanthan gum at concentration of 1.5 and 2.0%. The activation energy of flow of 1.0% CMC solution was 4.58Kcal/mole at a low temperature region and 5.95Kcal/mole at a high temperature region. Dynamic viscoelasticity of CMC solutions was remarkably high at 2.0%, and loss tangent was evaluated to be 1.8. This result indicated that intermolecular secondary bonding was formed partially. Dynamic viscoelasticity of CMC solutions increased at low temperature but decreased with increasing temperature, while loss tangent also decreased from 1.8 to 1.2 with increasing temperature from zero to 65℃. Thus, intermolecular secondary bonds seemed to be attributed to intra-and intermolecular hydrogen bonding.
内容記述タイプ Other
内容記述 紀要論文
出版者
言語 ja
出版者 琉球大学農学部
言語
言語 eng
資源タイプ
資源タイプ departmental bulletin paper
資源タイプ識別子 http://purl.org/coar/resource_type/c_6501
出版タイプ
出版タイプ VoR
出版タイプResource http://purl.org/coar/version/c_970fb48d4fbd8a85
識別子
識別子 http://hdl.handle.net/20.500.12000/3964
識別子タイプ HDL
収録物識別子
収録物識別子タイプ ISSN
収録物識別子 0370-4246
収録物識別子タイプ NCID
収録物識別子 AN00250548
収録物名
言語 ja
収録物名 琉球大学農学部学術報告
書誌情報
号 31, p. 57-66
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