Chemical Engineering Journal ( IF 13.3 ) Pub Date : 2023-04-07 , DOI: 10.1016/j.cej.2023.142868
Pengpeng Lu , Jingyang Xu , Weijun Tian , Chengchun Zhang , Shichao Niu , Jie Zhao , Weihua Ming , Luquan Ren
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Given the vulnerability of conventional antifogging coatings to mechanical damage, self-healing capability can significantly restore their functionality, but are difficult to materialize quickly and effectively. Herein, we report a facile UV-curable antifogging coating, based on host–guest interaction to obtain both ultra-fast self-healing performance and robust mechanical properties. Initially, a pair of host–guest supermolecules (HGSM) consisting of acrylic β-cyclodextrin (Aβ-CD) and acrylic adamantane (AAM) are synthesized and utilized as cross-linkers. Together with hydrophilic and hydrophobic moieties, 2-acrylamide-2-methylpropane sulfonic acid (AMPS) and methyl methacrylate (MMA), a robust antifogging coating with ultra-fast self-healing ability is developed via a facile UV curing process. Benefitting from the delicate balance of both hydrophilic and hydrophobic constituents, the resultant coatings display excellent antifogging performance with ∼90 % of light transmission, ranging from −20 °C to 85 °C. The unique non-covalent host–guest structure was covalently integrated into a cross-linked network, as-prepared coating and bulk gel exhibited ultra-fast self-healing capability, needing only ∼15 s to completely heal the cracks under the hot-steam environment (85 °C). And the bulk gels with host–guest recognition can significantly improve its self-healing efficiency to ∼88.3 %, significantly greater than its H-bonding counterpart (43.5 %). Notably, the prepared coating with strong adhesion properties (∼431 KPa) is robust enough to withstand 1,000 cycles of abrasion and 2 h of water immersion to maintain excellent antifogging performance. This strategy might open new avenues for accelerating the use of host–guest assembly to rapidly build effective antifogging/self-healing coatings and promote their applications in more harsh fogging conditions.
中文翻译:
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通过主客体策略实现具有超快自愈性能的坚固防雾涂层
鉴于传统防雾涂层易受机械损伤,自我修复能力可以显着恢复其功能,但难以快速有效地实现。在此,我们报告了一种简便的 UV 固化防雾涂层,该涂层基于主客体相互作用,以获得超快的自愈性能和稳健的机械性能。最初,合成了一对由丙烯酸 β-环糊精 (Aβ-CD) 和丙烯酸金刚烷 (AAM) 组成的主客体超分子 (HGSM),并将其用作交联剂。连同亲水和疏水部分,2-丙烯酰胺-2-甲基丙烷磺酸(AMPS) 和甲基丙烯酸甲酯 (MMA),一种坚固的防雾涂层,具有超快的自愈能力,是通过简单的紫外线固化工艺开发的。受益于亲水性和疏水性成分的微妙平衡,所得涂层显示出出色的防雾性能,透光率约为 90%,温度范围为 -20 °C 至 85 °C。独特的非共价主客体结构共价结合成交联网络,制备的涂层和散装凝胶表现出超快的自愈能力,仅需约 15 秒即可完全治愈热蒸汽下的裂缝环境 (85 °C)。具有主客体识别功能的块状凝胶可以显着提高其自愈效率至 ~88.3%,明显高于其氢键对应物 (43.5%)。尤其,制备的涂层具有很强的附着力(~431 KPa),足够坚固,可以承受 1,000 次磨损循环和 2 小时的水浸,以保持出色的防雾性能。该策略可能会为加速主客体组装的使用开辟新途径,以快速构建有效的防雾/自修复涂层,并促进其在更恶劣的雾化条件下的应用。