Synthesis and characterization of thermoresponsive ZIF-8@PNIPAm-co-MAA microgel composites with enhanced performance as an adsorption/release platform,RSC Advances

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Synthesis and characterization of thermoresponsive ZIF-8@PNIPAm-co-MAA microgel composites with enhanced performance as an adsorption/release platform
RSC Advances ( IF 3.9 ) Pub Date : 2020-1-14 , DOI: 10.1039/c9ra09729e
Juan A Allegretto _{1,

2} , Juan M Giussi ₁ , Sergio E Moya ₃ , Omar Azzaroni ₁ , Matias Rafti ₁

Affiliation

Composite materials featuring a synergic combination of interesting properties such as stimuli responsiveness and tailored porosity are highly appealing due to their multiple possible applications. We hereby present an example which brings together such features by using poly(N-isopropyl-acrylamide)-derived thermo-responsive microgels and Zn-based Metal Organic Framework (MOF) ZIF-8, capable of selective adsorption. Such a composite was obtained by including methacrylic acid as a co-monomer in the microgel, in order to position carboxylic acid moieties within the polymeric matrix, which via preconcentration of MOF precursors would trigger confined heterogeneous nucleation. The highly integrated composite obtained features thermoresponsivity and permanent porosity. Methylene blue adsorption/desorption experiments were performed, revealing a dramatic enhancement of its cargo capacity together with an increased release efficiency.

中文翻译：

具有增强吸附/释放平台性能的热响应 ZIF-8@PNIPAm-co-MAA 微凝胶复合材料的合成和表征

复合材料具有有趣的特性（如刺激响应性和定制的孔隙率）的协同组合，由于其多种可能的应用而极具吸引力。我们在此展示了一个示例，该示例通过使用聚（ N-异丙基-丙烯酰胺）衍生的热响应微凝胶和能够选择性吸附的锌基金属有机框架 (MOF) ZIF-8将这些特征结合在一起。这种复合材料是通过在微凝胶中包含甲基丙烯酸作为共聚单体来获得的，以便将羧酸部分定位在聚合物基质中，其通过MOF前体的预浓缩将引发受限的异质成核。获得的高度集成的复合材料具有热响应性和永久孔隙率。进行了亚甲蓝吸附/解吸实验，揭示了其载货容量的显着增强以及释放效率的提高。

更新日期：2020-01-14

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