羧基功能化聚甲基丙烯酸甲酯类微球的制备及对亚甲基蓝的吸附

张令辉, 高旻, 郭爽, 闫雪峰, 于良民

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材料工程 ›› 2025, Vol. 53 ›› Issue (2) : 219-226. DOI: 10.11868/j.issn.1001-4381.2024.000062
研究论文

羧基功能化聚甲基丙烯酸甲酯类微球的制备及对亚甲基蓝的吸附

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Preparation of carboxyl-functionalized poly (methyl methacrylate) microspheres and their adsorption behavior towards methylene blue

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摘要

采用无皂乳液聚合法,用甲基丙烯酸甲酯、丙烯酸(功能单体)、苯乙烯、甲基丙烯酸烯丙酯(交联剂)合成了羧基功能化聚甲基丙烯酸甲酯微球,通过丙烯酸用量对微球的形貌及羧基含量进行调控,对产物进行了SEM,FT-IR以及TG的表征。并系统的探究了产物对亚甲基蓝(MB)染料吸附性能的影响。结果表明,丙烯酸的用量为单体总物质的量的1/3时聚合物微球形貌均一,粒径为854 nm左右,且对MB染料具有良好的吸附效果。在303.15 K下,聚合物微球对MB染料的理论最大吸附量为177.69 mg·g-1。该吸附过程是一个自发的放热过程,吸附数据符合拟二阶动力学模型和Langmuir等温线模型。在经历5次吸附-再生循环之后,微球对MB染料仍保持了97%以上的吸附效率。

Abstract

The carboxyl-functionalized poly(methyl methacrylate) microspheres were successfully synthesized via soap-free emulsion polymerization, utilizing methyl methacrylate and styrene as monomers, acrylic acid as functional monomer, and methyl methacrylate isobutylene as crosslinking agent. These microspheres were employed to adsorb methylene blue (MB), and the impact of acrylic acid contents on the morphology and adsorption capacity of the microspheres was systematically investigated. The SEM, FT-IR, and TG were employed to comprehensively analyze the synthesized products. The results reveal that, when the amount of acrylic acid is 1/3 of the total amount of monomers, the microspheres exhibit uniform morphology with a narrow particle size distribution of about 854 nm. These microspheres demonstrate excellent adsorption performance for methylene blue dye at 303.15 K, with a theoretical maximum adsorption capacity of 177.69 mg·g-1. The adsorption process is exothermic, and the adsorption data fit well with the pseudo-second-order kinetic model and Langmuir isotherm model. After 5 cycles of adsorption-regeneration, the microspheres still maintain an adsorption efficiency of more than 97% for MB.

关键词

聚合物微球 / 甲基丙烯酸甲酯 / 丙烯酸 / 吸附 / 亚甲基蓝

Key words

polymer microsphere / methyl methacrylate / acrylic acid / adsorption / methylene blue

中图分类号

O63

引用本文

导出引用
张令辉 , 高旻 , 郭爽 , . 羧基功能化聚甲基丙烯酸甲酯类微球的制备及对亚甲基蓝的吸附. 材料工程. 2025, 53(2): 219-226 https://doi.org/10.11868/j.issn.1001-4381.2024.000062
Linghui ZHANG, Min GAO, Shuang GUO, et al. Preparation of carboxyl-functionalized poly (methyl methacrylate) microspheres and their adsorption behavior towards methylene blue[J]. Journal of Materials Engineering. 2025, 53(2): 219-226 https://doi.org/10.11868/j.issn.1001-4381.2024.000062

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基金

海南省自然科学基金资助项目(522CXTD520)

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