盐和温度对水溶液中的香糖多糖的作用
Emmanuel M Nsengiyumva1,2, Mark P Heitz2, Paschalis Alexandridis1
1Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York (SUNY), Buffalo, NY 14260, USA.
International journal of molecular sciences
|January 11, 2024
概括
香 (XG) 的粘度受到温度和盐离子的显著影响. 高温扩展XG链,而等盐通过选电荷收缩它们,影响其质.
科学领域:
- 聚合物科学 聚合物科学
- 物理化学 物理化学
- 材料科学 材料科学 材料科学
背景情况:
- 赞坦 (XG) 是一种多用途的离子多糖,被广泛用作风湿学修饰剂.
- 它的物理化学特性对于食品和石油工业的应用至关重要.
研究的目的:
- 为了研究温度和不同盐类 (Na+,K+,Ca2+) 对水溶液中的香甘属性的影响.
- 在不同的条件下量化内在粘度和线圈半径的变化.
主要方法:
- 准备了含有不同度的NaCl,KCl和CaCl2的松竹溶液.
- 内在粘度 ([η]) 通过分析相对和特定粘度数据,使用Huggins,Kraemer和Rao模型来确定.
- 评估了温度 (20-50°C) 和盐度 (0.05-100mM) 对XG特性的影响.
主要成果:
- 与盐溶液相比,在水中的香甘固有粘度 ([η]) 对温度升高的敏感性更高.
- 盐计量器选了桑坦上的离子电荷,降低了高达60%的内在粘度,并减少了线圈半径.
- 离子 (Ca2+) 在电荷选中比单价离子 (Na+,K+) 更有效.
- 温度升高促进了链条的扩张,抵消了由盐引起的结构收缩.
结论:
- 温度和盐度显著影响了桑坦的溶液行为和风湿性质.
- 反离子的电荷选效应,特别是双价离子,导致的结构收缩.
- 了解这些相互作用是优化桑坦在各种工业应用中的性能的关键.
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