Zahra Mossayebi, Sadegh Shabani, Christopher D Easton, Paul A Gurr, Ranya Simons, Greg G Qiao
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引用次数: 0
摘要
设计有效的防雾涂层在抵御物理和化学损伤方面面临挑战,而且在侵蚀性环境中持续易分解。由于防雾涂层的坚固性取决于其物理化学结构特征,因此通过独特的制造策略进行精确控制至关重要。为了应对这一挑战,本文介绍了一种利用开环偏聚固态连续组装聚合物(ssCAPROMP)同时定向生长和交联的纳米级防雾薄膜的新方法。通过加入聚二甲基硅氧烷、聚(2-(甲基丙烯酰氧基)乙基)三甲基氯化铵(PMETAC)和可聚合降冰片烯(NB)悬垂基团,设计出了一种新型两亲性共聚物(指定为大交联剂),使 ssCAPROMP 能够在环境条件下生成防雾薄膜。这种新方法可产生独特的表面和分子特性。通过调整吸水性和纳米级组装参数,生产出了超薄(≤100 nm)防雾薄膜,其耐久性得到了增强,尤其是在强酸碱环境下的耐久性超过了商用防雾玻璃。针对外部干扰的厚度损失分析进一步验证了通过 ssCAPROMP 引入的稳定的表面系留化学成分,即使在加入最低含量的可交联 NB 分子(5 摩尔%)的情况下也是如此。此外,一种潜在的齐聚物润湿机制也阐明了防雾观察结果。这项研究为通过简便、稳健的表面化学方法探索纳米工程防雾涂层开辟了一条独特的途径。
Amphiphilic Nanoscale Antifog Coatings: Improved Chemical Robustness by Continuous Assembly of Polymers.
Designing effective antifog coatings poses challenges in resisting physical and chemical damage, with persistent susceptibility to decomposition in aggressive environments. As their robustness is dictated by physicochemical structural features, precise control through unique fabrication strategies is crucial. To address this challenge, a novel method for crafting nanoscale antifog films with simultaneous directional growth and cross-linking is presented, utilizing solid-state continuous assembly of polymers via ring-opening metathesis polymerization (ssCAPROMP). A new amphiphilic copolymer (specified as macrocross-linker) is designed by incorporating polydimethylsiloxane, poly(2-(methacryloyloxy)ethyl) trimethylammonium chloride (PMETAC), and polymerizable norbornene (NB) pendant groups, allowing ssCAPROMP to produce antifog films under ambient conditions. This novel approach results in distinctive surface and molecular characteristics. Adjusting water-absorption and nanoscale assembly parameters produced ultra-thin (≤100 nm) antifog films with enhanced durability, particularly against strong acidic and alkaline environments, surpassing commercial antifog glasses. Thickness loss analysis against external disturbances further validated the stable surface-tethered chemistries introduced through ssCAPROMP, even with the incorporation of minimal content of cross-linkable NB moieties (5 mol%). Additionally, a potential zwitter-wettability mechanism elucidates antifog observations. This work establishes a unique avenue for exploring nanoengineered antifog coatings through facile and robust surface chemistries.
期刊介绍:
Small serves as an exceptional platform for both experimental and theoretical studies in fundamental and applied interdisciplinary research at the nano- and microscale. The journal offers a compelling mix of peer-reviewed Research Articles, Reviews, Perspectives, and Comments.
With a remarkable 2022 Journal Impact Factor of 13.3 (Journal Citation Reports from Clarivate Analytics, 2023), Small remains among the top multidisciplinary journals, covering a wide range of topics at the interface of materials science, chemistry, physics, engineering, medicine, and biology.
Small's readership includes biochemists, biologists, biomedical scientists, chemists, engineers, information technologists, materials scientists, physicists, and theoreticians alike.