Rheological properties of deacetylated xanthan in aqueous media.

• TAKO Masakuni

  Department of Agricultural Chemistry, Faculty of Agriculture, University of the Ryukyus

• NAKAMURA Sanehisa

  Department of Agricultural Chemistry, Faculty of Agriculture, University of the Ryukyus

抄録

Flow properties of aqueous deacetylated xanthan solutions could be approximated to pseudoplastic behavior at concentrations below 0.1% but to plastic behavior above 0.3%. The flow indices in the power law for the deacetylated xanthan were somewhat different at various concentrations. The apparent viscosity of deacetylated xanthan decreased with increasing temperature at relatively low concentrations from 0.1 to 0.5%, however, it increased with increasing temperature, showed a maximum value at 40°C and decreased gradually at 1.0%. Compared with native xanthan, deacetylated material showed higher dynamic viscoelasticity at high concentrations. The dynamic viscoelasticity of deacetylated xanthan decreased with increasing temperature at various concentrations. The dynamic viscoelasticity of deacetylated xanthan was decreased by addition of urea (4.0M).<br> This suggests that acetate residues, which are attached to the inner mannose residues of the side chains, contribute to the intramolecular association, and that the side chains of xanthan become more flexible after deacetylation.

収録刊行物

• Agricultural and Biological Chemistry

  Agricultural and Biological Chemistry 48 (12), 2987-2993, 1984

  公益社団法人 日本農芸化学会

キーワード

• General Agricultural and Biological Sciences
• General Biochemistry, Genetics and Molecular Biology

詳細情報

• CRID: 1390282681443732480
• NII論文ID: 130000027087
• DOI: 10.1271/bbb1961.48.2987
• COI: 1:CAS:528:DyaL2MXnslequw%3D%3D
• ISSN: 18811280
• ISSN: 00021369
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可