Shen Jiahao, Zhang Heng, Zhu Jingxin, Ma Yanlong, He Hongwei, Zhu Fengbo, Jia Lan, Zheng Qiang
College of Material Science and Engineering, Taiyuan University of Technology, Taiyuan, China.
Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering, Taiyuan, China.
Front Chem. 2022 Mar 2;10:855352. doi: 10.3389/fchem.2022.855352. eCollection 2022.
Waterborne polyurethane has been proven to be an ideal additive for the preparation of hydrogels with excellent mechanical properties. This work reports that a satisfactory adhesion of acrylamide hydrogels can be obtained by introducing a large amount of waterborne polyurethane into system. A series of polyurethane hydrogels was prepared by using one-pot method with acrylamide monomer and 2-hydroxymethyl methacrylate end-modified waterborne polyurethane emulsion. The hydrogels exhibit good strength (greater than 30 KPa), wide range of adjustable strain (200%-800%), and excellent compression fatigue resistance. The performance improvement is attributed to the fact that the polyurethane emulsion containing double bonds provides chemical crosslinking and forms polyurethane microregions due to hydrophilic and hydrophobic interactions. The hydrogel shows extensive and repeatable adhesion on diverse substrates. This simple preparation method through polyurethane crosslinked hydrogels is expected to become a low-cost and efficient preparation strategy for hydrogel adhesives.
水性聚氨酯已被证明是制备具有优异机械性能的水凝胶的理想添加剂。这项工作报道，通过向体系中引入大量水性聚氨酯，可以获得令人满意的丙烯酰胺水凝胶附着力。采用一锅法，以丙烯酰胺单体和2-羟甲基丙烯酸甲酯封端的水性聚氨酯乳液制备了一系列聚氨酯水凝胶。这些水凝胶表现出良好的强度（大于30kPa）、宽范围的可调应变（200%-800%）和优异的抗压缩疲劳性能。性能的提高归因于含双键的聚氨酯乳液提供化学交联，并由于亲水和疏水相互作用形成聚氨酯微区。该水凝胶在多种基材上表现出广泛且可重复的附着力。这种通过聚氨酯交联水凝胶的简单制备方法有望成为一种低成本、高效的水凝胶粘合剂制备策略。
