Smart hydrogels have attracted considerable attention as smart window materials. However, the existing gel-based smart windows are often unable to be applied to humid environments due to their extreme swelling in aquatic environments. Herein, a nucleobase-inspired water-resistant adhesive is successfully designed and cleverly applied in smart windows. The adhesive exhibits durable and robust adhesion in various aquatic environments, including water, seawater, physiological saline, NaCl solutions, and a wide range of pH solutions (pH = 1–10). The adhesive can maintain high adhesive strength (∼0.8 MPa) in different harsh water environments for up to six months. Remarkably, the adhesive can be directly brushed onto surfaces of various shapes and substrates for information encryption and smart windows. The smart windows not only display stable and recyclable transparency changes triggered by solvents but also impart ordinary brittle glass with excellent impact resistance for effective stress protection. The water-resistant adhesives exhibit promising applications in underwater sealing, underwater repairing, underwater electronic devices, and underwater soft robots. It is anticipated that the strategy of water-resistant adhesive coatings will offer a broad perspective for the advancement of next-generation smart windows.

中文翻译：

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适用于抗冲击智能窗户的坚固耐用的防水粘合剂

智能水凝胶作为智能窗户材料引起了广泛关注。然而，现有的基于凝胶的智能窗户由于在水生环境中极度膨胀，通常无法应用于潮湿环境。在此，成功设计了一种受核碱基启发的防水粘合剂，并巧妙地应用于智能窗户。该粘合剂在各种水生环境中表现出持久而强大的粘合力，包括水、海水、生理盐水、氯化钠溶液和各种 pH 溶液 (pH = 1–10)。该粘合剂在不同恶劣的水环境中可保持高达六个月的高粘合强度（∼0.8 MPa）。值得注意的是，该粘合剂可以直接涂刷在各种形状和基材的表面上，用于信息加密和智能窗户。智能窗不仅表现出由溶剂引发的稳定且可回收的透明度变化，而且赋予普通脆性玻璃优异的抗冲击性，以实现有效的应力保护。防水粘合剂在水下密封、水下修复、水下电子设备和水下软机器人等领域具有广阔的应用前景。预计防水粘合剂涂层的策略将为下一代智能窗户的发展提供广阔的前景。