Rheological properties of hydrogels based on ionic liquids
Rheological properties of hydrogels based on ionic liquids
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DOI：
10.1016/j.polymertesting.2020.106943
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发表时间：
2021-01-01
期刊：
影响因子：
5.1
通讯作者：
Kragl, U.
中科院分区：
文献类型：
--
作者：
Jastram, A.;Claus, J.;Kragl, U.
基于聚合离子液体的水凝胶越来越多地应用于医疗和制药行业，如植入物、药物输送系统、隐形眼镜材料、骨替代品和支架涂层。因此，它们需要具有生物相容性、柔韧性和对外部压力的抵抗力。为了满足这些要求，人们对这些有趣的聚合物的设计、合成和表征产生了很大的兴趣。在这项工作中，研究了十种不同聚合离子液体基水凝胶的力学性能，如凝胶动力学、抗剪切应变能力以及对压缩和拉伸的响应，完成了这些材料流变行为的描述。有趣的是，拉伸测量结果表明，导致破坏的临界应变范围从4.8 +/- 1.1到47.9 +/- 15.1%，压缩测量的临界应变范围从7.8 +/- 3.6到高于59.8 +/- 17.3%，剪切时的线性粘弹性范围从14 +/- 8到267 +/- 26%。这些结果允许改进设计，“选择最好的材料”工具箱用于医疗应用。
Hydrogels, based on polymerized ionic liquids, are increasingly used in the medical and pharmaceutical industry as implants, drug delivery systems, contact lens material, bone substitutes and stent coatings. Therefore they need to be biocompatible, flexible and resistant to external stress. In order to meet these requirements, there is a large interest in design, synthesis and characterization of these interesting polymers. In this work, mechanical properties such as gelation kinetics, shear strain resistance, and response to compression and stretching of ten different polymerized ionic liquid-based hydrogels were examined, completing the picture of the rheological behavior of these materials. Interestingly, the investigations of stretching measurements showed a wide range of critical strains leading to failure from 4.8 +/- 1.1 to 47.9 +/- 15.1%and in compression measurements critical strain from 7.8 +/- 3.6 to higher than 59.8 +/- 17.3%, as well as a linear viscoelastic range in shear from 14 +/- 8 to 267 +/- 26%. These results allow improved design with a "choose-the-best-material"-toolbox for medical applications.