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日用化学工业（中英文）

日用化学工业 ›› 2022, Vol. 52 ›› Issue (6): 613-619.doi: 10.3969/j.issn.1001-1803.2022.06.006

• 开发与应用 • 上一篇    下一篇

棉织物洗涤中染料转移抑制的影响因素研究

孟明珠1,2,张真真1,2,梁帅童1,2,*(),张红娟1,2,王际平1,2   

  1. 1.上海工程技术大学 纺织服装学院,上海 201620
    2.上海纺织化学清洁生产工程技术研究中心,上海 201620
  • 收稿日期:2021-08-16 修回日期:2022-05-26 出版日期:2022-06-22 发布日期:2022-06-22
  • 通讯作者: 梁帅童

Study on the influencing factors of dye transfer inhibition in cotton fabric washing

Meng Mingzhu1,2,Zhang Zhenzhen1,2,Liang Shuaitong1,2,*(),Zhang Hongjuan1,2,Wang Jiping1,2   

  1. 1. School of Textile and Fashion Shanghai University of Engineering Science, Shanghai 201620, China
    2. Shanghai Engineering Research Center for Clean Production of Textile Chemistry, Shanghai 201620, China
  • Received:2021-08-16 Revised:2022-05-26 Online:2022-06-22 Published:2022-06-22
  • Contact: Shuaitong Liang

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摘要：

研究了水硬度、用水量、洗涤温度和染料转移抑制剂（Dye transfer inhibitor,DTI）对直接蓝6的转移抑制影响。实验结果显示水硬度越小,用水量越大,温度越高,染料转移抑制效果越好。洗涤体系中Ca2+和Mg2+的存在不仅降低了纤维表面的Zeta电位,还降低了染料与纤维之间的静电排斥力,染料不易脱落。水量越大,染料质量浓度越低,洗涤体系中的初始动压增大,织物内的染料较快流过,减少在织物上的沉积。高温下染料分子解吸速率大于染色速率,20 min的洗涤时间足以使染料从纤维上脱落。在0.3 g/L质量浓度范围内DTI中仅有聚乙烯吡咯烷酮和它的交联聚合物对染料有明显的抑制作用。聚合物因具有许多亲水基团,易与染料结合。而吡啶-n-氧化物和月桂基甜菜碱属于小分子表面活性剂。

关键词: 染料转移, 水硬度, 用水量, 温度, 质量浓度

Abstract:

Dye transfer in household washing has always been a problem that disturbs people. Herein, the influences of four factors including water hardness, water amount, washing temperature and Dye transfer inhibitor （DTI） on the transfer inhibition of Direct Blue 6 on cotton fabrics were studied. The response surface method （RSM） models of the 4 factors were built. All the RSM models show that water hardness is the most significant negative factor. Based on the DLVO theory, due to the presence of Ca2+ and Mg2+, the increase of water hardness can not only reduce the zeta potential of the fabric surface, but also cause the decrease of electrostatic repulsion between Direct Blue 6 and the fabric, and thus the dye won’t go off the fabric easily, that is, the dye is more likely to be adsorbed on the surface of the fabric. The increase of water amount can enhance the dye transfer inhibition effect. When the water amount increases, the initial mass concentration of dye is decreased, and the initial dynamic pressure of washing is increased, so that the dye flows through the fabric rapidly and the deposition on the fabric is reduced. The washing temperature also has a positive effect. When the washing temperature increases, the movement speed of dye molecules is increased, and the desorption rate is greater than the dyeing rate, so the dye molecules can shed from the fiber. Within the mass concentration range of 0.3 g/L DTI, only polyvinylpyrrolidone （PVP） and its cross-linked polymer have obvious inhibition effects on dye. Polymers have many hydrophilic groups and are easy to bind with direct dyes. However, pyridine-n-oxide （PNO） and lauryl betaine are small-molecule surfactants. Their structural differences make the RSM model show that polymers have better effects. The results of quantum chemical calculation also prove that the interactions between polymers and Direct Blue 6 are greater than the interactions between PNO and Direct Blue 6 or between lauryl betaine and Direct Blue 6. In addition, there is interplay between different washing factors. This work provides necessary basic information for the optimization of washing process for cotton fabrics and the modification of DTI.

Key words: dye transfer, water hardness, water consumption, temperature, mass concentration

中图分类号: 

  • TQ423