School of Energy and Materials, Shanghai Polytechnic University, Shanghai 201209, China.
School of Materials and Metallurgy, University of Birmingham, Birmingham B15 2TT, UK.
Int J Mol Sci. 2022 Dec 12;23(24):15757. doi: 10.3390/ijms232415757.
Hydrogels with a three-dimensional network structure are particularly outstanding in water absorption and water retention because water exists stably in the interior, making the gel appear elastic and solid. Although traditional hydrogels have good water absorption and high water content, they have poor mechanical properties and are not strong enough to be applied in some scenarios today. The proposal of double-network hydrogels has dramatically improved the toughness and mechanical strength of hydrogels that can adapt to different environments. Based on ensuring the properties of hydrogels, they themselves will not be damaged by excessive pressure and tension. This review introduces preparation methods for double-network hydrogels and ways to improve the mechanical properties of three typical gels. In addition to improving the mechanical properties, the biocompatibility and swelling properties of hydrogels enable them to be applied in the fields of biomedicine, intelligent sensors, and ion adsorption.
具有三维网络结构的水凝胶在吸水和保水方面表现出色，因为水稳定地存在于内部，使凝胶呈现出弹性和固态。尽管传统的水凝胶具有良好的吸水性和高含水量，但它们的机械性能较差，强度不足以应用于当今的一些场景。双网络水凝胶的提出极大地提高了水凝胶的韧性和机械强度，使其能够适应不同的环境。在保证水凝胶性能的基础上，它们本身不会因过度的压力和张力而受损。本综述介绍了双网络水凝胶的制备方法和三种典型凝胶的机械性能改善方法。除了改善机械性能外，水凝胶的生物相容性和溶胀性能使其能够应用于生物医学、智能传感器和离子吸附等领域。
