Preparation of organic pigment dispersants based on comb-shaped acrylic copolymer and their applications

IF 4.1 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments Pub Date : 2025-01-27 DOI:10.1016/j.dyepig.2025.112665

Tingwu Liu , Kexin Chen , Jianwei Han , Limin Wang

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引用次数: 0

Abstract

Optimizing the structure of comb-shaped acrylic copolymers is essential for developing high-performance organic pigment dispersants in waterborne coatings. In this study, a series of copolymers composed of benzyl methacrylate (BzMA) and poly(ethylene glycol) methyl ether methacrylate (mPEGMA) was synthesized via solution polymerization, maintaining a consistent molecular weight while varying the monomer ratios. The copolymers were comprehensively characterized using gel permeation chromatography (GPC), nuclear magnetic resonance (NMR), Fourier transform infrared spectroscopy (FTIR), and differential scanning calorimetry (DSC) analysis. Surface properties were investigated by measuring the critical micelle concentration (CMC), micellization energy, and limiting area at the liquid-gas interface as a function of polymer concentration and surface tension. The thickness of the hydration layer was calculated based on the structure, while the micelle size was determined using dynamic light scattering (DLS). Adsorption isotherms of the polymers on phthalocyanine blue were measured to evaluate changes in adsorption amount, adsorption energy, and limiting area at the solid-liquid interface in relation to the monomer ratio. Comparison of the results from adsorption and surface tension tests elucidated polymer conformations at both liquid-gas and solid-liquid interfaces. The dispersing performance of the polymers was also evaluated by testing the viscosity, particle size, and stability of pigment dispersions. This study provides insights into the design of effective polymeric dispersants for waterborne systems.

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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.