Polymer ( IF 4.1 ) Pub Date : 2023-08-18 , DOI: 10.1016/j.polymer.2023.126274 Xiangzhao Wang , Xiaobin Huang , Zemin Ji , Wenbin Hu , Haoqiang Sheng , Xiaofei Li
Icephobic coatings have attracted wide attention due to low energy consumption, low cost, and high efficiency. However, the icephobic coating is vulnerable to external damage due to long-term exposure, which can result in icephobic properties loss and limit its industrial application. Herein, the novel amphiphilic epoxy self-healing icephobic coating was designed by a compound with multiple hydrophilic groups, polydimethylsiloxane (PDMS) with hydrophobic groups and 4, 4′-diaminodiphenyldisulfide (APD) with reversible bonds. Moreover, considering the resource crisis, the biobased epoxy (GTE) was selected as the compound containing hydrophilic groups. In this study, the GTE will form hydrogen bonds with water molecules to achieve an anti-icing effect, while PDMS mainly play a deicing effect due to low surface energy. Due to the reasonable design, the icephobic coating showed good comprehensive icephobic properties: a 12.5-fold increase in icing delay time (802 s) and a 6.6-fold decrease in ice adhesion strength (32.6 kPa) compared with bare aluminum. Furthermore, the crystallization temperature of water was reduced by about 11 °C. More importantly, the APD with reversible disulfide bonds provides the icephobic coating with self-healing performance, removability, and excellent UV shielding performance. The coating provides a new idea for the preparation of sustainable and durable coatings with comprehensive icephobic performance.
中文翻译:
基于生物基环氧树脂和可逆二硫键的具有紫外线屏蔽和可去除性的自修复疏冰涂层
疏冰涂料因能耗低、成本低、效率高而受到广泛关注。然而,疏冰涂层由于长期暴露而容易受到外部损伤,导致疏冰性能损失,限制了其工业应用。在此,新型两亲环氧自修复疏冰涂层由具有多个亲水基团的化合物、具有疏水基团的聚二甲基硅氧烷(PDMS)和具有可逆键的4, 4'-二氨基二苯基二硫醚(APD)设计。此外,考虑到资源危机,选择生物基环氧树脂(GTE)作为含有亲水基团的化合物。在本研究中,GTE 将形成氢键PDMS由于表面能低,主要起到除冰作用。由于合理的设计,疏冰涂层表现出了良好的综合疏冰性能:与裸铝相比,结冰延迟时间(802 s)增加了12.5倍,冰附着强度(32.6 kPa)降低了6.6倍。此外,水的结晶温度降低了约11℃。更重要的是,具有可逆二硫键的APD为疏冰涂层提供了自修复性能、可去除性和优异的紫外线屏蔽性能。该涂料为制备具有综合疏冰性能的可持续耐用涂料提供了新思路。