化学
生物高聚物
阿累尼乌斯方程
活化能
粘度
盐酸
热力学
二甲基亚砜
壳聚糖
阿伦尼乌斯图
物理化学
有机化学
聚合物
物理
作者
Wiem Ardhaoui,Emna Cherif
标识
DOI:10.1080/00319104.2023.2249578
摘要
ABSTRACTThe present work is concerned with experimental results of viscosimetric properties of materials biopolymer of chitosan solutions in HCl acid and dimethyl sulphoxide DMSO. The dynamic viscosity of solutions of Chitosan CH + DMSO/HCl over a wide range of concentrations (1 to 10) g/l and at different temperatures (293.15 to 318.15) K was measured. The reduced dynamic viscosity and the activation energy of reduced dynamic viscosity Eη are calculated. Biopolymer solutions exhibit a critical concentration c*, separating the dilute solutions and semi-dilute solutions. The most important results refer to the activation energy of reduced dynamic viscosity found from Arrhenius plots. The dependence of the activation energy on solution concentration and temperature is discussed. The biopolymer CH behaviour can be extrapolated from the Flory-Huggins theory by decomposing such as Eη = (Eη)di + (Eη)sdi + (Eη)cri. The dilute solution behaviour of Arrhenius is described by the CH-DMSO/HCL interaction and represented by the function (Eη)di. For the semi-dilute solution behaviour of non-Arrhenius which is described by the interaction between the CH–CH and represented by the function (Eη)sdi. The critical solution behaviour is described by the interaction between the CH-CH-DMSO/HCl and represented by the function (Eη)cri.KEYWORDS: Reduced viscosityactivation energytemperaturepolymerchitosanDMSO Disclosure statementNo potential conflict of interest was reported by the authors.
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