• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Applied Polymer Science >Dextran-Rare Earth Ion Interactions.I.Dynamics in Aqueous Solutions
【24h】

Dextran-Rare Earth Ion Interactions.I.Dynamics in Aqueous Solutions

机译：葡聚糖-稀土离子相互作用。水溶液中的动力学

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The interaction of light-lanthanoid cations(La~(3+),Ce~(3+),and Nd~(3+)) with dextran in aqueous solutions was studied by viscosimetric ,turbidimetric ,and conductimetric methods.The effects of the type of the cation and the concentration of the cation on the interaction mechanism were investigated.Viscosity behavior of the solutions was interpreted using the Huggins and Kraemer equations;intrinsic viscosities and the slopes were calculated .The results found from the Huggins and Kraemer approaches accorded well.The order of interaction was determined as La~(3+)>Ce~(3+)>Nd~(3+).In all experimental methods applied,a critical concentration of the Ln~(3+) ion (approx=0.08 mol Ln~(3+)/L) was noted at which the observed property showed a significant change.Up to this critical concentration ,viscosities of the dextran/Ln~(3+) solutions decreased and after making an outstanding turn at this point increased toward higher concentrations .Turbidimetric and precipitation experments gave opposite results as expected but the same order for the cation and the same value o critical concentration.The results obtained from the application of a mathematical model to the precipitation data verified the conclusions attained by viscosimetry and conductimetry.
机译：通过粘度，比浊和电导方法研究了轻镧系阳离子（La〜（3 +），Ce〜（3+）和Nd〜（3+））与右旋糖酐的相互作用。研究了阳离子的类型和阳离子在相互作用机理上的浓度。使用Huggins和Kraemer方程解释了溶液的粘度行为;计算了本征粘度和斜率。相互作用的顺序确定为La〜（3 +）> Ce〜（3 +）> Nd〜（3+）。在所有应用的实验方法中，Ln〜（3+）离子的临界浓度（约=观察到0.08 mol Ln〜（3 +）/ L），观察到的性质发生了显着变化。直到达到此临界浓度，右旋糖酐/ Ln〜（3+）溶液的粘度降低，并在此转弯后表现出色点向较高浓度增加。浊度和降水实验给出相反的结果。结果与预期的相同，但阳离子的阶数相同，临界浓度相同。降水量数据数学模型的应用结果验证了粘度法和电导法得出的结论。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号