Synthesis of comb-like polycarboxylate dispersants and the effect of anchoring groups on the dispersion performance and stability for disperse dyes

IF 4.2 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments Pub Date : 2025-08-31 DOI:10.1016/j.dyepig.2025.113179

Shuntao Liu, Pengpeng Huang, Mingming Fan, Pingbo Zhang

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Abstract

To obtain a new type of amphiphilic dispersant for improving the dispersion performance of disperse dyes, a series of polycarboxylate sodium salt dispersants (MHT, MAT, MST, MLT) with different anchoring groups were prepared by polymerization with one of hydroxyethyl acrylate, acrylamide, sodium p-styrenesulfonate, and sodium allylsulfonate, using maleic anhydride as the main carboxylic acid monomer, and isoprenyl alcohol ethoxylate as solventized side chain. The effect of the ratio of hydrophilic to hydrophobic groups on the performance of the dispersants was also discussed to understand the molecular composition of the macromolecular polycarboxylate dispersants with polyether as the side chain and the effect of this ratio on the dispersion of hydrophobic dyes. When hydroxyethyl acrylate was used as the hydrophobic monomer and the molar ratio of hydrophilic to hydrophobic groups was 2:1, the average particle size of the dispersed dye solution was 292.9 nm, smaller than that of the milled commercially available dye. The zeta potential of the dye using MHT-4 as a dispersant reached −36.7 mV. Furthermore, the synthesis process of MHT-4 was straightforward, and the prepared dye solution demonstrated that the dispersed dye particles were characterized by small particle size, centralized distribution, and stability, making it easy to dye polyester fabrics with a suitable dyeing rate. Therefore, MHT-4 is an efficient dispersant suitable for dyeing with disperse dyes.

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梳状聚羧酸酯分散剂的合成及锚定基团对分散染料分散性能和稳定性的影响

为获得一种改善分散染料分散性能的新型两亲性分散剂，以马来酸酐为主要羧酸单体，以异戊醇乙氧基酯为溶剂侧链，以丙烯酸羟乙酯、丙烯酰胺、对苯乙烯磺酸钠和烯丙基磺酸钠中的一种为原料，通过聚合法制备了具有不同锚定基团的聚羧酸钠盐分散剂MHT、MAT、MST、MLT。探讨了亲疏水基团的比例对分散剂性能的影响，以了解以聚醚为侧链的高分子聚羧酸酯分散剂的分子组成及其比例对疏水染料分散性能的影响。以丙烯酸羟乙酯为疏水单体，亲疏水基团的摩尔比为2:1时，分散染料溶液的平均粒径为292.9 nm，比市购染料研磨后的平均粒径小。以MHT-4为分散剂的染料zeta电位达到−36.7 mV。此外，MHT-4的合成工艺简单，制备的染料溶液表明，分散的染料颗粒具有粒径小、分布集中、稳定性好等特点，易于以合适的染色率染色涤纶织物。因此，MHT-4是一种适用于分散染料染色的高效分散剂。

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来源期刊

Dyes and Pigments 工程技术-材料科学：纺织

CiteScore

8.20

自引率

13.30%

发文量

933

审稿时长

33 days

期刊介绍： Dyes and Pigments covers the scientific and technical aspects of the chemistry and physics of dyes, pigments and their intermediates. Emphasis is placed on the properties of the colouring matters themselves rather than on their applications or the system in which they may be applied. Thus the journal accepts research and review papers on the synthesis of dyes, pigments and intermediates, their physical or chemical properties, e.g. spectroscopic, surface, solution or solid state characteristics, the physical aspects of their preparation, e.g. precipitation, nucleation and growth, crystal formation, liquid crystalline characteristics, their photochemical, ecological or biological properties and the relationship between colour and chemical constitution. However, papers are considered which deal with the more fundamental aspects of colourant application and of the interactions of colourants with substrates or media. The journal will interest a wide variety of workers in a range of disciplines whose work involves dyes, pigments and their intermediates, and provides a platform for investigators with common interests but diverse fields of activity such as cosmetics, reprographics, dye and pigment synthesis, medical research, polymers, etc.