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首页> 外文期刊>繊維学会誌 >Effects of Polymer Molecular Weight on the Interaction between Acid Dyes and Poly(vinylpyrrolidone) in Inkjet Ink for Textiles
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Effects of Polymer Molecular Weight on the Interaction between Acid Dyes and Poly(vinylpyrrolidone) in Inkjet Ink for Textiles

机译：聚合物分子量对纺织品喷墨油墨中酸性染料与聚乙烯吡咯烷酮相互作用的影响

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摘要

The detailed understanding of the interaction between dyes and additives in the practical service condition is required to develop an inkjet ink for textiles. In the present study, the interaction between three acid dyes (C. I. Acid Red 88, 13, and 27) and a water-soluble polymer, poly(vinylpyrrolidone) (PVP), with different molecular weight was investigated. The binding constants of the dyes with PVP, K_(bind), were determined by means of the visible absorption spectrum measurements. The K_(bind) values decreased with an increase in the number of sulfonate groups in the acid dyes (an increase in the solubility of the dyes in water). This suggests that the affinity to PVP decreases with increasing water solubility. Furthermore, the binding constants were diminished by increasing molecular weight of PVP. It is presumably due to the conformation change of PVP with molecular weight. For further discussion, the thermodynamic parameters for the binding, viz. the enthalpy change, ΔH_(bind), and the entropy change, ΔS_(bind), were determined from the temperature dependence of K_(binnd). The ΔH_(bind) values for all the dyes were negative, showing that the binding processes are exothermic. The absolute values of ΔH_(bind) decreased with the increase in the number of sulfonate groups in the dye molecules. On the other hand, the increase of PVP molecular weight made the thermodynamic process to be less enthalpic and more entropic. Thus, the nature of the interaction should be affected by PVP molecular weight, because the polymer conformation is strongly influenced by the molecular weight.
机译：要开发用于纺织品的喷墨油墨，需要对染料和添加剂在实际使用条件下的相互作用有详细的了解。在本研究中，研究了三种酸性染料（C. I.酸性红88、13和27）与具有不同分子量的水溶性聚合物聚（乙烯基吡咯烷酮）（PVP）之间的相互作用。借助于可见吸收光谱测量来确定染料与PVP的结合常数K_（结合）。随着酸性染料中磺酸根基团数目的增加（染料在水中的溶解度增加），K_（结合）值降低。这表明对PVP的亲和力随水溶性增加而降低。此外，通过增加PVP的分子量来降低结合常数。据推测，这是由于PVP的构象随分子量的变化。为了进一步讨论，结合的热力学参数，即。根据K_（binnd）的温度依赖性确定焓变ΔH_（bind）和熵变ΔS_（bind）。所有染料的ΔH_（bind）值为负，表明结合过程是放热的。 ΔH_（bind）的绝对值随着染料分子中磺酸根基团数目的增加而降低。另一方面，PVP分子量的增加使热力学过程的焓变小而熵变大。因此，相互作用的性质应受PVP分子量的影响，因为聚合物的构象受分子量的强烈影响。

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  • 来源
    《繊維学会誌》 |2011年第11期|p.233-239|共7页
  • 作者

    Ju-Young Park; Yuichi Hirata; Kunihiro Hamada;

  • 作者单位

    Faculty of Textile Science and Technology, Shinshu University,3-15-1 Tokida, Ueda, Nagano 386-8567, Japan;

    Faculty of Textile Science and Technology, Shinshu University,3-15-1 Tokida, Ueda, Nagano 386-8567, Japan;

    Faculty of Textile Science and Technology, Shinshu University,3-15-1 Tokida, Ueda, Nagano 386-8567, Japan;

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