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具有增强性能的热响应性ZIF-8@PNIPAm-MAA微凝胶复合材料的合成与表征，作为一种吸附/释放平台。

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

作者信息

Allegretto Juan A, Giussi Juan M, Moya Sergio E, Azzaroni Omar, Rafti Matias

机构信息

Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, CONICET Calle 64 y Diag. 113 1900 La Plata Argentina

Universidad Nacional de San Martin (UNSAM) San Martín Argentina.

出版信息

RSC Adv. 2020 Jan 14;10(5):2453-2461. doi: 10.1039/c9ra09729e.

DOI:10.1039/c9ra09729e
PMID:35496105
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9048415/
Abstract

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(-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 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.

摘要

具有刺激响应性和定制孔隙率等有趣特性协同组合的复合材料，因其多种可能的应用而极具吸引力。在此，我们展示一个通过使用聚（-异丙基丙烯酰胺）衍生的热响应微凝胶和具有选择性吸附能力的锌基金属有机框架（MOF）ZIF-8将这些特性结合在一起的例子。这种复合材料是通过在微凝胶中加入甲基丙烯酸作为共聚单体来制备的，以便在聚合物基质中定位羧酸基团，MOF前体的预浓缩会引发受限的异相成核。所获得的高度集成的复合材料具有热响应性和永久孔隙率。进行了亚甲基蓝吸附/解吸实验，结果表明其负载能力显著提高，释放效率也有所增加。

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