GELATION MECHANISM OF IONIC POLYSACCHARIDES

被引：7

作者：

GAMINI, A ^{[1
]}

CIVITARESE, G ^{[1
]}

CESARO, A ^{[1
]}

DELBEN, F ^{[1
]}

PAOLETTI, S ^{[1
]}

机构：

[1] UNIV TRIESTE,DEPT BIOCHEM BIOPHYS & MACROMOLEC CHEM,I-34127 TRIESTE,ITALY

来源：

MAKROMOLEKULARE CHEMIE-MACROMOLECULAR SYMPOSIA | 1990年 / 39卷

关键词：

D O I：

10.1002/masy.19900390113

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Experimental results obtained by membrane equilibria, osmotic pressure, viscosity and circular dichroism measurements on alginate and pectate solutions in the presence of Ca2+ ions are presented. From equilibrium dialysis data both electrostatic and cooperative interactions seem to describe the binding process of Ca2+ ions onto polymer chains. An increase of the number-average molecular weight MBAR(n) for both polysaccharides with calcium ion concentration is observed. An increase of polymer dimensions can well account for the observed increase of the intrinsic viscosity [eta] with bound Ca2+ ion concentration at several ionic strengths.

引用

页码：143 / 154

页数：12

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