Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology, College of Chemical and Biological Engineering, Zhejiang University , Hangzhou 310027, People's Republic of China.
Langmuir. 2017 Oct 3;33(39):10340-10350. doi: 10.1021/acs.langmuir.7b02691. Epub 2017 Sep 22.
In this work, a novel substrate building block, magnetic FeO nanoparticles armed with dopamine molecules were developed via mussel-inspired metal-coordination bonds. Combined with glycidyl methacrylate, polydimethylsiloxane propyl ether methacrylate, and diethylenetriamine, the original silicone oil swelling slippery liquid-infused porous surfaces (SLIPS) were first prepared by reversible coordinate bonds and strong covalent bonds cross-linking process. The matrix mechanical characteristics and surface physicochemical properties were systematically investigated. Results showed that the mechanical property of copolymer matrix and surface wettability of SLIPS can be remarkably recovered, which were due to the synergistic interactions of magnetic nanoparticles' intrinsic photothermal effect, reversible Fe-catechol coordination, and diffused lubricating liquid. After irradiating with sunlamp for 2 h and sequentially healing for 10 h under ambient conditions, the crack almost disappeared under optical microscopy with 78.25% healing efficiency (HEf) of toughness, and surface slippery was completely retrieved to water droplets. The efficient self-heal of copolymer matrix (66.5% HEf after eighth cutting-healing cycle) and recovering of slipperiness (SA < 5° and 5° < SA < 17° after fourth and eighth cutting-centrifuging-healing cycles, respectively) would extend longevity of SLIPS when subjected to multiple damages. Moreover, the prepared SLIPS displayed superb self-cleaning and liquid-repellent properties to a wide range of particulate contaminants and fluids.
在这项工作中，通过贻贝启发的金属配位键，开发了一种新型的基底构建块，即带有多巴胺分子的磁性 FeO 纳米粒子。通过与甲基丙烯酸缩水甘油酯、丙基聚二甲基硅氧烷甲基丙烯酸酯和二乙烯三胺结合，首次通过可逆配位键和强共价键交联过程制备了原始的硅油膨胀滑液注入多孔表面（SLIPS）。系统研究了基质的力学特性和表面物理化学性质。结果表明，共聚物基质的力学性能和 SLIPS 的表面润湿性可以得到显著恢复，这是由于磁性纳米粒子固有光热效应、可逆 Fe-儿茶酚配位和扩散润滑液的协同相互作用。在太阳光下照射 2 小时后，并在环境条件下连续愈合 10 小时，在光学显微镜下几乎看不到裂纹，韧性的愈合效率（HEf）达到 78.25%，水滴完全恢复到滑溜状态。共聚物基质的高效自愈合（第八次切割-愈合循环后的 HEf 为 66.5%）和滑溜性的恢复（第四次和第八次切割-离心-愈合循环后的 SA 分别为<5°和 5°<SA<17°）在受到多次损伤时会延长 SLIPS 的使用寿命。此外，所制备的 SLIPS 对各种颗粒污染物和流体表现出出色的自清洁和拒液性能。
