Adsorption Performance of Acid Dyes on Color-Adsorbing Nonwoven and Its Application in the Washing of Silk Textiles

ABSTRACT

In recent years, the use of color-adsorbing nonwoven as a dye transfer inhibitor to prevent the cross-staining of fabrics in home laundering has received great attention. In this work, a color-adsorbing nonwoven was used to adsorb the dyes desorbed from dyed silk textiles and thereby provide an anti-staining effect in the washing. The nonwoven consisted of cationic regenerated cellulose and polyolefin fibers and had an isoelectric point of 7.82. The adsorption properties of acid dyes on the nonwoven and the anti-staining of the nonwoven were studied. The adsorption kinetics and isotherms of acid dyes on the nonwoven followed the pseudo-second-order kinetic and Langmuir adsorption models, respectively. With increasing temperature, the adsorption saturation increased, and the Langmuir affinity constant decreased, indicating an exothermic effect. The adsorption of dyes with high molecular weight showed great temperature dependence. During the washing of dyed silk textiles, the strong adsorption capability of cationic cellulose for desorbed acid dyes contributed to the anti-staining effect of color-adsorbing nonwoven.

摘要

近年来，用具有吸色功能的非织造布（吸色片）作为染料转移抑制剂来防止家用洗涤中织物的交叉沾色受到了极大的关注。在本工作中，吸色片被用于吸附从染色蚕丝纺织品上解吸至洗涤液中的染料，从而在洗涤中起到防沾色作用。本研究所用吸色片由阳离子再生纤维素和聚烯烃纤维组成，等电点为7.82，讨论了酸性染料在吸色片上的吸附性能和吸色片的防沾色效果。酸性染料在吸色片上的吸附动力学和吸附等温线分别遵循准二级动力学和朗缪尔模型。随着温度的升高，吸附饱和度增加，朗缪尔亲和力常数降低，表明该吸附存在放热效应。分子质量高的染料的吸附表现出更大的温度依赖性。在染色蚕丝纺织品的洗涤过程中，吸色片的防沾色作用归因于其阳离子纤维素组分对解吸酸性染料的强吸附力。

KEYWORDS:

• Silk
• cationic cellulose
• color-adsorbing nonwoven
• acid dyes
• adsorption
• anti-Staining

关键词:

• 蚕丝
• 阳离子纤维素
• 吸色片
• 酸性染料
• 吸附
• 抗沾色

Disclosure statement

No potential conflict of interest was reported by the author(s).