在水中具有高水合能力和亚甲基蓝吸附能力的共聚水凝胶

IF 4.1 2区化学 Q2 POLYMER SCIENCE

Polymer Pub Date : 2024-11-06 DOI:10.1016/j.polymer.2024.127761

Estefanía Oyarce , Héctor Diaz , Andrés Boulett , Karina Roa , Julio Sánchez , Oscar G. Marambio , Guadalupe del C. Pizarro

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引用次数: 0

摘要

以甲基丙烯酸羟乙酯（HEMA）和甲基丙烯酸羟丙酯（HPMA）为基料，按不同的单体摩尔比制备了伊塔康酸单甲酯（βHI）共聚物。测定了共聚反应活性参数（r1 和 r2）。r1 和 r2 的值表明 P(βHI-co-HEMA)具有很高的交替共聚倾向。利用傅立叶变换红外光谱（FTIR）和 1H-NMR 光谱对共聚水凝胶进行了结构表征，观察到了组成官能团的特征信号。通过热重分析（TGA）观察了聚合物体系的典型热稳定性。此外，还评估了在水中的溶胀能力，在 pH 值为 10、0.05 M NaNO3 存在的条件下，P(βHI-co-HEMA) 和 P(βHI-co-HMA) 在 15 天内的溶胀率分别超过 655 % 和 1249 %。P(βHI-co-HEMA) 和 P(βHI-co-HPMA) 的甲基溴吸附量分别为 122.79 mg g-1 和 112.24 mg g-1。所得数据与埃洛维奇动力学模型和 Redlich-Peterson 等温线进行了拟合。热力学参数表明，吸附现象是自发的、内热的，而且发生的概率很高。在存在干扰离子（Na+、K+、Ca2+ 和 Cl-）的情况下，吸附效率会降低约 60%。这些吸附剂可重复使用，在纺织模拟废水中的甲基溴吸附效率很高（P(βHI-co-HEMA) 和 P(βHI-co-HPMA) 分别为 90% 和 80%）。根据所获得的结果，可以得出结论：P(βHI-co-HEMA) 和 P(βHI-co-HHPMA) 在吸附水分子、保留甲基溴和净化纺织工业模拟废水方面具有巨大的应用潜力。

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Copolymeric hydrogels with high capacities of hydration and methylene blue adsorption in water

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Copolymeric hydrogels with high capacities of hydration and methylene blue adsorption in water

Copolymers based on monomethyl hydrogen itaconate (βHI) with 2-hydroxyethyl methacrylate (HEMA) and βHI with 2-hydroxypropyl methacrylate (HPMA) were prepared in different monomer molar ratios. The reactivity parameters of copolymerization (r₁ and r₂) were determined. The values obtained for r₁ and r₂ indicate that P(βHI-co-HEMA) exhibits a high tendency towards alternate copolymerization. Structural characterization of the copolymeric hydrogels was carried out using Fourier transform infrared (FTIR) and ¹H NMR spectroscopies, where the characteristic signals of the constituent functional groups were observed. The typical thermal stability of the polymeric systems was observed by thermogravimetric analysis (TGA). In addition, the swelling capacity in water was evaluated, and a swelling percentage over 655 % and 1249 % presented P(βHI-co-HEMA) and P(βHI-co-HPMA) respectively, in a period of 15 days at pH 10, and presence of 0.05 M NaNO₃.

Additionally, methylene blue (MB) adsorption capacity was studied in batch mode by varying different experimental parameters. MB adsorption capacity of 122.79 mg g⁻¹ and 112.24 mg g⁻¹ were achieved for P(βHI-co-HEMA) and P(βHI-co-HPMA), respectively. The data obtained were fitted to the Elovich kinetic model and to a Redlich-Peterson isotherm. The thermodynamic parameters indicated that the adsorption phenomenon is spontaneous, endothermic and with a high probability of occurrence. The adsorption efficiency decreases by approximately 60 % in the presence of interfering ions (Na⁺, K⁺, Ca²⁺ and Cl⁻). The adsorbents are reusable and achieve high MB adsorption efficiency (90 % and 80 % for P(βHI-co-HEMA) and P(βHI-co-HPMA) respectively) in a textile-simulated wastewater. Based on the results obtained, it is concluded that P(βHI-co-HEMA) and P(βHI-co-HPMA) show great potential for use in adsorption of water molecules, for MB retention and purification of simulated effluents from the textile industry.

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来源期刊

Polymer 化学-高分子科学

CiteScore

7.90

自引率

8.70%

发文量

959

审稿时长

32 days

期刊介绍： Polymer is an interdisciplinary journal dedicated to publishing innovative and significant advances in Polymer Physics, Chemistry and Technology. We welcome submissions on polymer hybrids, nanocomposites, characterisation and self-assembly. Polymer also publishes work on the technological application of polymers in energy and optoelectronics. The main scope is covered but not limited to the following core areas: Polymer Materials Nanocomposites and hybrid nanomaterials Polymer blends, films, fibres, networks and porous materials Physical Characterization Characterisation, modelling and simulation* of molecular and materials properties in bulk, solution, and thin films Polymer Engineering Advanced multiscale processing methods Polymer Synthesis, Modification and Self-assembly Including designer polymer architectures, mechanisms and kinetics, and supramolecular polymerization Technological Applications Polymers for energy generation and storage Polymer membranes for separation technology Polymers for opto- and microelectronics.