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Super Strong and Multi-Reusable Supramolecular Epoxy Hot Melt Adhesives
ACS Materials Letters ( IF 9.6 ) Pub Date : 2021-06-14 , DOI: 10.1021/acsmaterialslett.1c00277
Peng Sun 1 , Yuquan Li 1 , Bo Qin 1 , Jiang-Fei Xu 1 , Xi Zhang 1
Affiliation  

Hot melt adhesives are widely applied owing to their solvent-free nature. Developing robust and multi-reusable hot melt adhesives without harsh bonding conditions remains a great challenge. Herein, we develop a novel strategy of incorporating flexible side chains into the network of highly noncovalently cross-linked hot melt adhesives to construct super strong and multi-reusable supramolecular epoxy hot melt adhesives (SEA). The SEA was prepared via polycondensation of diglycidyl ether of bisphenol A with O-(2-ureido-4[1H]-pyrimidinone)-O′-(2-aminopropyl)polypropylene glycol (the noncovalent cross-linker) and O-(2-aminopropyl)-O′-(2-methoxyethyl)polypropylene glycol (the flexible side chain). Impressively, the prepared SEA was endowed with a super high adhesion strength of 10.2 MPa, which is the highest adhesion strength in bonding stainless steel among hot melt adhesives constructed by dynamic bonds to the best of our knowledge. It also featured excellent multiple reusability with more than 80% of the original adhesion strength remained even after reuse for six times. Meanwhile, the SEA displayed an outstanding ability to bond diverse substrates tightly under considerably moderate bonding conditions (80 °C for 5 min). It is highly anticipated that this work will open a new avenue of designing hot melt adhesives with the high adhesion strength and excellent multiple reusability.

中文翻译:

超强、可多次重复使用的超分子环氧热熔胶

热熔胶由于其无溶剂性质而被广泛应用。开发坚固且可多次重复使用的热熔胶粘剂仍然是一项巨大的挑战。在此,我们开发了一种将柔性侧链结合到高度非共价交联的热熔胶网络中的新策略,以构建超强且可多次重复使用的超分子环氧热熔胶 (SEA)。SEA 是通过双酚 A 的二缩水甘油醚与O -(2-ureido-4[1H]-pyrimidinone) -O '-(2-氨基丙基)聚丙二醇(非共价交联剂)和O -(2 -氨基丙基) -O'-(2-甲氧基乙基)聚丙二醇(柔性侧链)。令人印象深刻的是,所制备的 SEA 具有 10.2 MPa 的超高粘合强度,这是据我们所知,在通过动态粘合构建的热熔胶中粘合不锈钢的最高粘合强度。它还具有优异的多次重复使用性,即使重复使用六次,仍保持原始粘合强度的80%以上。同时,SEA 在相当温和的粘合条件下(80°C 持续 5 分钟)显示出出色的粘合各种基材的能力。备受期待的是,这项工作将为设计具有高粘合强度和优异多次重复使用性的热熔胶开辟一条新途径。
更新日期:2021-07-05
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