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著作: [玉井 伸岳]/巽 大輔/松本 孝芳/Rheological Properties and Molecular Structure of Tunicate Cellulose in LiCl/1,3-Dimethyl-2-imidazolidinone/[Biomacromolecules]

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EID
81304
EOID
657778
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2012年9月4日(火) 15:28:14
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大家 隆弘
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玉井 伸岳
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種別 必須 学術論文(審査論文)
言語 必須 英語
招待 推奨
審査 推奨
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学究種別 推奨
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著者 必須
  1. 玉井 伸岳([徳島大学.大学院社会産業理工学研究部.生物資源産業学域.応用生命系.応用生物資源学分野]/[徳島大学.生物資源産業学部.生物資源産業学科.応用生命講座])
    役割 任意
    貢献度 任意
    学籍番号 推奨
  2. (英) Tatsumi Daisuke / (日) 巽 大輔 / (読) たつみ だいすけ
    役割 任意
    貢献度 任意
    学籍番号 推奨
  3. (英) Matsumoto Takayoshi / (日) 松本 孝芳 / (読) まつもと たかよし
    役割 任意
    貢献度 任意
    学籍番号 推奨
題名 必須

(英) Rheological Properties and Molecular Structure of Tunicate Cellulose in LiCl/1,3-Dimethyl-2-imidazolidinone

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要約 任意

(英) Solution properties and molecular structure of tunicate cellulose (TC), an animal cellulose from Halocynthia roretzi, were investigated in terms of rheological and dilute solution properties. The solvent used is 8 wt % LiCl/1,3-dimethyl-2-imidazolidinone (DMI). A solution of dissolving pulp (DP), derived from plant, was also used for comparison. The weight-average molecular weight, Mw, and the limiting viscosity number, [eta], of the TC were evaluated to be 413 x 10(6) and 2645 mL/g, respectively. The TC solution showed the same concentration dependence of GN (GN=5.49 x 10(6)phiw(2.1)4 Pa; phiw: weight fraction of cellulose in solution; GN: plateau modulus) as the DP solution and, moreover, also as the solution of cotton linter (CC) in 8 wt % LiCl/N,N-dimethylacetamide (DMAc). This exponent of 2.1(4) indicates that network structure by entanglements was formed in these solutions. According to the theory of Fetters et al., moreover, such identity means that all of these celluloses have the identical chain structure though their biological origins are far different. On the other hand, the phiw-dependence of eta0-etas (eta0=zero shear rate viscosity of solution; etas=solvent viscosity) was different between the TC and the DP solution in the semidilute regime: the TC solution exhibited eta0-etas proportional, variant phiw(7.5) and the DP solution eta0-etas proportional, variant phiw4. According to the theory of Doi-Edwards, this exponent of 4 (the DP solution) indicates that the DP behaves as flexible polymers in the solution. In contrast, the dependence for the TC solution seems unexplainable on the basis of molecular theories. This difference probably signifies the difference in the relaxation process or mechanism in entanglement systems.

キーワード 推奨
  1. (英) Animals
  2. (英) Cellulose
  3. (英) Elasticity
  4. (英) Imidazoles
  5. (英) Lithium Chloride
  6. (英) Rheology
  7. (英) Shear Strength
  8. (英) Solutions
  9. (英) Urochordata
  10. (英) Viscosity
発行所 推奨
誌名 必須 Biomacromolecules([アメリカ化学会])
(pISSN: 1525-7797, eISSN: 1526-4602)
ISSN 任意 1525-7797
ISSN: 1525-7797 (pISSN: 1525-7797, eISSN: 1526-4602)
Title: Biomacromolecules
Title(ISO): Biomacromolecules
Publisher: American Chemical Society
 (NLM Catalog  (Scopus  (CrossRef (Scopus information is found. [need login])
必須 5
必須 2
必須 422 432
都市 任意
年月日 必須 2004年 3月 8日
URL 任意 http://pubs.acs.org/cgi-bin/article.cgi/bomaf6/2004/5/i02/pdf/bm034230s.pdf
DOI 任意 10.1021/bm034236h    (→Scopusで検索)
PMID 任意 15003002    (→Scopusで検索)
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備考 任意
  1. (英) Article.Affiliation: Division of Forest and Biomaterials Science, Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan.

  2. (英) Article.PublicationTypeList.PublicationType: Comparative Study

  3. (英) Article.PublicationTypeList.PublicationType: Journal Article

  4. (英) Article.PublicationTypeList.PublicationType: Research Support, Non-U.S. Gov't

  5. (英) MedlineDate: 2004 Mar-Apr