Sol-gel transition of sonicated gellan gums in aqueous solutions

被引：0

作者：

Ogawa, Etsuyo ^{[1
]}

Sugimoto, Kiyoji ^{[1
]}

Takahashi, Rheo ^{[1
]}

Yajima, Hirofumi ^{[1
]}

Kubota, Kenji ^{[1
]}

Nishinari, Katsuyoshi ^{[1
]}

机构：

[1] Showagakuin Jr Coll, Chiba 2720823, Japan

来源：

Transactions of the Materials Research Society of Japan, Vol 31, No 3 | 2006年 / 31卷 / 03期

关键词：

gellan gum; sol-gel transition; coil-helix transition; aqueous solution; theology;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Gellan gum undergoes gelation by forming domains composed of associated double-helices. In this study, we investigated the coil to double-helix transition and the sol to gel transition of sonicated sodium-type gellan gums (Na-gellans) in aqueous solutions by theological measurements. Three well-purified Na-gellan samples with different molar masses were prepared by sonic irradiation and purification. Temperature dependence of storage modulus (G') and loss modulus (G") of these three samples were measured from 60 to 5 degrees C in aqueous solutions. It was found that the coil to double-helix transition temperatures (T-ch) for the three sonicated Na-gellans were almost the same, however, the sol-gel transition temperature (T,,) depended markedly on molar mass and T-sg of Na-gellans decreased with decreasing molar mass of the samples.

引用

页码：731 / 734

页数：4

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