Liu Bo, Xu Ziyang, Fan Chuanchuan, Cui Chunyan, Yao Yuan, Xiao Meng, Liu Wenguang
School of Materials Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin, 300350, China.
Macromol Rapid Commun. 2021 May;42(9):e2100010. doi: 10.1002/marc.202100010. Epub 2021 Feb 26.
Water-resistant and high-strength adhesion on different surfaces has attracted considerable attention for decades. However, the adhesion performances of conventional adhesives suffer from deterioration in adhesion performances under water or wet conditions. This work proposes a dipole-dipole interaction strategy for fabricating a solvent-free adhesive that is synthesized via simple one-step copolymerization of dipole monomer acrylonitrile (AN), crosslinker poly(ethylene glycol) diacrylate (PEGDA) with variable length, and a monomer-soluble initiator that initiates room-temperature polymerization. The dipole-dipole interactions from cyan groups in AN concurrently contribute to strong cohesion and adhesion strength in bonding to a wide range of substrates including aluminum, ceramic, glass fiber, epoxy resin, polyethylene terephthalate, wood, and fractured large segmental bone. The adhesion strengths are dependent upon the length of PEGDA, and the shorter PEGDA-crosslinked PAN adhesive demonstrates outstanding water-resistant adhesion spanning pH 2 to pH 10 for 30 days with adhesion strength ranging from 3.31 to 3.97 MPa due to strong dipole-dipole pairing shielding. This dipole-dipole interaction and co-dissolution strategy open a new avenue for creating high-strength water-resistant adhesives for promising applications in engineering and hard-tissue repair.
几十年来，在不同表面上的防水和高强度粘附力一直备受关注。然而，传统粘合剂的粘附性能在水或潮湿条件下会变差。这项工作提出了一种偶极 - 偶极相互作用策略，用于制造一种无溶剂粘合剂，该粘合剂通过偶极单体丙烯腈（AN）、不同长度的交联剂聚乙二醇二丙烯酸酯（PEGDA）和引发室温聚合的单体可溶性引发剂的简单一步共聚反应合成。AN中氰基的偶极 - 偶极相互作用同时有助于在与包括铝、陶瓷、玻璃纤维、环氧树脂、聚对苯二甲酸乙二酯、木材和骨折的大段骨头等多种基材结合时具有很强的内聚力和粘附强度。粘附强度取决于PEGDA的长度，较短的PEGDA交联的PAN粘合剂由于强大的偶极 - 偶极配对屏蔽作用，在pH值2至10的范围内具有出色的防水粘附性，持续30天，粘附强度范围为3.31至3.97MPa。这种偶极 - 偶极相互作用和共溶解策略为制造高强度防水粘合剂开辟了一条新途径，有望在工程和硬组织修复中得到应用。
