Increasing interest for polysaccharides investigation is based on their friendly behavior with environment and living organisms. The chemical structure, molar mass, chain conformation adopted in different media plays an important role for their performances in various practical applications. In this context, the viscometric behavior of two cationic pullulan and curdlan derivatives has been followed in water and salt solutions. The biopolyelectrolytes contain trimethylammonium propyl carbamate groups and trimethyl-N-(2-hydroxypropyl)ammonium ones attached to the backbone of pullulan and curdlan, respectively. The viscosity data have been interpreted in terms of the Wolf model. From the estimated values of the hydrodynamic parameters expressed by intrinsic viscosity [η], the hydrodynamic interaction parameter (b), etc., the dependence of the polyion conformation on the polyelectrolyte concentration and salt nature and concentration has been revealed; [η] decreased and b increased with increasing salt concentration and counterions valence. The viscosity data obtained in salt solutions allowed the estimation of the stiffness parameter (B), the expansion factors for the viscosity (α_η) and for the root mean-square radius of gyration, α_S, etc. and the establishment of counterions binding type as an “atmospheric ionic” one for the mononovalent counterions.

人们对多糖研究的兴趣日益浓厚是基于它们与环境和生物体的友好行为。不同介质中采用的化学结构、摩尔质量、链构象对其在各种实际应用中的性能起着重要作用。在这种情况下，跟踪了两种阳离子普鲁兰多糖和凝胶多糖衍生物在水和盐溶液中的粘度行为。生物聚电解质含有分别连接到支链淀粉和凝乳多糖主链上的三甲基铵丙基氨基甲酸酯基团和三甲基-N-(2-羟丙基)铵基团。粘度数据已根据 Wolf 模型进行解释。从特性粘度[ η]、流体动力学相互作用参数(b )等表示的流体动力学参数的估计值，揭示了聚离子构象对聚电解质浓度以及盐性质和浓度的依赖性；随着盐浓度和抗衡离子价数的增加，[η] 降低，b在盐溶液中获得的粘度数据可以估计刚度参数 (B)、粘度膨胀系数 (α _η ) 和均方根回转半径α _S等，并建立反离子结合类型为一价抗衡离子的“大气离子”。