Beijing National Laboratory for Molecular Sciences, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.
University of Chinese Academy of Sciences, Beijing, 100049, China.
Adv Sci (Weinh). 2022 May;9(14):e2200072. doi: 10.1002/advs.202200072. Epub 2022 Mar 14.
Fogging on optical devices may severely impair vision, resulting in unacceptable adverse consequences. Hydrophilic coatings can prevent surface fogging by instantly facilitating pseudo-film water condensation but suffer from short antifogging duration due to water film thickening with further condensation. Here, an innovative strategy is reported to achieve longer antifogging duration via thickening the robust bonded hydrophilic/hydrophobic polymer heteronetwork coating to enhance its water absorption capacity. The combination of strong interfacial adhesion and hydrophilic/hydrophobic heteronetwork structure is key to this approach, which avoids interfacial failure and swelling-induced wrinkles under typical fogging conditions. The developed antifogging coating exhibits prolonged antifogging durations over a wide temperature range for repetitious usages. Eyeglasses coated with this coating successfully maintained fog-free vision in two typical scenarios. Besides, the coating recipes developed in this study also have potential as underwater glues as they demonstrate strong adhesions to both glass and polymer substrates in wet conditions.
光学器件上的雾化会严重影响视力，导致不可接受的不良后果。亲水性涂层可以通过瞬间促进伪膜水凝结来防止表面雾化，但由于水膜随着进一步的凝结而变厚，其防雾持续时间较短。在这里，报道了一种通过增稠强键合的亲水/疏水聚合物杂化网络涂层来实现更长防雾持续时间的创新策略，以提高其吸水性。强界面附着力和亲水/疏水杂化网络结构的结合是这种方法的关键，它可以避免在典型的雾化条件下发生界面失效和膨胀引起的皱纹。所开发的防雾涂层在较宽的温度范围内表现出延长的防雾持续时间，可重复使用。这种涂层涂覆的眼镜在两种典型情况下都能成功保持无雾视觉。此外，本研究中开发的涂层配方也有可能作为水下胶水，因为它们在潮湿条件下对玻璃和聚合物基材都具有很强的附着力。
