...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Materials Science >Solute adsorption and exclusion studies of the structure of never-dried and re-wetted cellulosic fibres
【24h】

Solute adsorption and exclusion studies of the structure of never-dried and re-wetted cellulosic fibres

机译：从未干燥和重新润湿的纤维素纤维结构的溶质吸附和排斥研究

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 total water capacity of a series of never-dried and re-wetted cellulosic fibres has been shown to correlate with the accessible volume described by a thermodynamic model. The model was applied to interpret the adsorption behaviour of a range of reactive dyes in electrolyte solutions and was successful in accounting for differences in fibre anionic charge. Comparative solute exclusion data indicated the existence of a population of very small spaces in never-dried cellulosic fibres, which may be associated with water disrupting the cellulose 1 (1) over bar0 crystal planes. Such intra-crystalline spaces may provide sites for uptake of planar substantive dyes and may also be accessible to sodium ions. The study showed that never-dried lyocell undergoes a large reduction in total wet capacity following initial drying, which is believed to be due to both exudation of crystal water and to inter-fibrillar crystallisation. This crystallisation mechanism may not be so effective for viscose and modal, which have poorer structural organization. Re-wetted lyocell exhibits high dye adsorption, which may result from the development of a uniform fibrillar morphology with a high surface area. This structural aspect is not expressed by the thermodynamic model.
机译：一系列未经干燥和重新润湿的纤维素纤维的总水容量已显示与热力学模型描述的可及体积相关。该模型用于解释一系列活性染料在电解质溶液中的吸附行为，并成功解决了纤维阴离子电荷的差异。比较的溶质排除数据表明，从未干燥的纤维素纤维中存在非常小的空间，这可能与水破坏bar0晶面上的纤维素1（1）有关。这样的晶体内空间可以提供摄取平面性直接染料的位点，并且钠离子也可以进入。研究表明，从未干燥的莱赛尔在初始干燥后，其总湿容量大幅度下降，这被认为是由于结晶水的渗出和原纤维间结晶所致。这种结晶机制对于结构组织较差的粘胶和莫代尔胶可能无效。重新润湿的莱赛尔纤维表现出较高的染料吸附性，这可能是由于具有高表面积的均匀原纤维形态的发展所致。热力学模型没有表达这种结构方面。

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