Polyacrylic acid (PAA) thickener was synthesized by inverse emulsion polymerization using acrylic acid and ammonia as aqueous monomers, potassium persulfate‑sodium pyrosulfite as redox system, 5# white oil as continuous phase, N, N′-Methylene bisacrylamide (MBA) as crosslinking agent. The Fourier transform infrared spectroscopy provided evidence for the synthesis of PAA. The scanning electron microscopy and transmission electron microscopy results indicated that the thickener has a spherical morphology and a nitrogen content of 11.22 %. To further improve the electrolyte resistance of the thickener, hydrophobic modified monomers were introduced into the polyacrylic acid molecular chain to construct a hydrophobic cross-linked network structure. The results showed that the viscosity and electrolyte resistance of the thickener were significantly improved. The modified thickener (PAA-SMA/LMA) was prepared by composite modification of octadecyl methacrylate and lauryl methacrylate, with a viscosity of 16,200 mPa·s (mass fraction of 2 wt%). The viscosity retention rates in the tap water and electrolyte solution were 88.69 % and 46.42 %, respectively. The dynamic light scattering and rheological results indicated that the particle size of the PAA-SMA/LMA was concentrated at 2.709 μm, and belonged to a pseudo-plastic fluid with good thixotropy. The PAA-SMA/LMA served as a carrier for dye transfer to nylon/wool carpets, meeting the requirements of ink-jet printing. The present study introduces a new approach to enhance the viscosity, rheological properties, and electrolyte resistance of thickeners. Furthermore, it provides a theoretical basis for the advancement of synthetic thickeners utilized in ink-jet printing processes.

中文翻译：

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地毯喷墨印花用耐电解液聚丙烯酸增稠剂的制备


以丙烯酸和氨水为水性单体，过硫酸钾-焦亚硫酸钠为氧化还原体系，5#白油为连续相，N,N'-亚甲基双丙烯酰胺（MBA）为交联剂，采用反相乳液聚合法合成聚丙烯酸（PAA）增稠剂。代理人。傅里叶变换红外光谱为PAA的合成提供了证据。扫描电镜和透射电镜结果表明，增稠剂的形貌为球形，氮含量为11.22%。为了进一步提高增稠剂的耐电解液性能，在聚丙烯酸分子链中引入疏水改性单体，构建疏水交联网络结构。结果表明，增稠剂的粘度和耐电解液性能显着提高。改性增稠剂（PAA-SMA/LMA）由甲基丙烯酸十八酯和甲基丙烯酸月桂酯复合改性而成，粘度为16,200 mPa·s（质量分数为2 wt%）。在自来水和电解质溶液中的粘度保留率分别为 88.69% 和 46.42%。动态光散射和流变结果表明PAA-SMA/LMA的粒径集中在2.709μm，属于假塑性流体，具有良好的触变性。 PAA-SMA/LMA作为染料转移到尼龙/羊毛地毯上的载体，满足喷墨印刷的要求。本研究介绍了一种提高增稠剂粘度、流变性能和耐电解质性的新方法。此外，它为喷墨印刷工艺中使用的合成增稠剂的进步提供了理论基础。