A temperature-responsive mixed matrix membrane based on poly(ionic liquid)@poly(N-isopropylacrylaminde) microgels and polyvinylidene fluoride for the selective separation of citrus flavonoids

IF 4.9 2区化学 Q1 CHEMISTRY, ANALYTICAL Microchemical Journal Pub Date : 2024-02-01 DOI:10.1016/j.microc.2024.110064

Zongkui Qin, Tian Lei, Shanshan Wang, Leilei Liu, Zhijian Tan

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Abstract

Herein, four novel poly(ionic liquid)@poly(N-isopropylacrylaminde) microgels were prepared and doped into polyvinylidene fluoride (PVDF) to fabricate eight temperature-responsive mixed matrix membranes (TRMs) for the efficient separation of natural citrus flavonoids, viz. naringin, neohesperidin, naringenin, and hesperetin. Dynamic light scattering of microgels in water at 20 and 50 ℃ confirmed their temperature-responsive properties. Water flux of TRMs at different temperatures proved their switchable response characteristic between 30 and 35 ℃. The mechanical property, pore size distribution, porosity, and specific surface area of these TRMs were measured. Moreover, the chemical structure, microstructure, hydrophobicity, thermostability, anti-fouling performance, and charge property were also confirmed for them. The M4 membrane exhibited a maximum separation selectivity of 81.66% at 20 ℃. Binding energy of G4 microgel to flavanone glycosides through H-bonding was greater than that of G4/flavanones. These TRMs, as a kind of novel separation materials, have the potential in the separation of various natural products.

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基于聚（离子液体）@聚（N-异丙基丙烯酰胺）微凝胶和聚偏氟乙烯的温度响应混合基质膜，用于选择性分离柑橘类黄酮化合物

本文制备了四种新型聚（离子液体）@聚（N-异丙基丙烯酰胺）微凝胶，并将其掺入聚偏氟乙烯（PVDF）中，制备了八种温度响应混合基质膜（TRMs），用于高效分离天然柑橘类黄酮，即柚皮苷、新橙皮苷、柚皮苷和橙皮素。微凝胶在 20 ℃ 和 50 ℃ 水温下的动态光散射证实了它们的温度响应特性。不同温度下 TRMs 的水通量证明了它们在 30 至 35 ℃ 之间的可切换响应特性。测量了这些 TRM 的机械性能、孔径分布、孔隙率和比表面积。此外，还确认了它们的化学结构、微观结构、疏水性、热稳定性、防污性能和电荷特性。M4 膜在 20 ℃ 时的最大分离选择性为 81.66%。G4 微凝胶通过 H 键与黄烷酮苷的结合能大于 G4/黄烷酮的结合能。这些 TRMs 作为一种新型分离材料，具有分离多种天然产物的潜力。

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来源期刊

Microchemical Journal 化学-分析化学

CiteScore

8.70

自引率

8.30%

发文量

1131

审稿时长

1.9 months

期刊介绍： The Microchemical Journal is a peer reviewed journal devoted to all aspects and phases of analytical chemistry and chemical analysis. The Microchemical Journal publishes articles which are at the forefront of modern analytical chemistry and cover innovations in the techniques to the finest possible limits. This includes fundamental aspects, instrumentation, new developments, innovative and novel methods and applications including environmental and clinical field. Traditional classical analytical methods such as spectrophotometry and titrimetry as well as established instrumentation methods such as flame and graphite furnace atomic absorption spectrometry, gas chromatography, and modified glassy or carbon electrode electrochemical methods will be considered, provided they show significant improvements and novelty compared to the established methods.