Kong Lingbo, Kong Xiangfei, Ji Zhiyong, Wang Xiaomei, Zhang Xu
Hebei key Laboratory of Functional Polymers, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, P.R. China.
School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300401, P.R. China.
ACS Appl Mater Interfaces. 2020 Nov 4;12(44):49694-49704. doi: 10.1021/acsami.0c15531. Epub 2020 Oct 22.
We propose a facile and effective route for large-scale fabrication of a superhydrophobic thermal energy storage (STES) sprayable coating with heat storage capacity and superhydrophobicity based on polydivinylbenzene (PDVB) nanotubes (NTs). Herein, the STES coating was applied on wood by convenient spraying, and the PDVB NTs played an integral role in the STES coating. On the one hand, PDVB NTs act as a support material to adsorb and prevent the leakage of industrial paraffin wax (IPW) because of the lipophilicity of PDVB NTs and the capillary forces between the PDVB NTs and the melted IPW. By improving the specific surface area of PDVB NTs, the PDVB NTs show a great loading capacity for IPW (78.29 wt %), which contributes to the large latent heat of fusion (119.6 J/g) of the STES coating. Moreover, the STES coating possesses good thermal reliability and thermal energy conversion ability. On the other hand, PDVB NTs as a framework combine with fluorine-containing SiO nanoparticles to form a hierarchical structure of the STES coating, which endows the STES coating satisfactory water-repellent properties with a water contact angle of 157.7° and a sliding angle of 1.3°. In addition, the coating possesses outstanding resistance against corrosive liquids and UV irradiation as well as has self-cleaning properties. Surprisingly, the knife scratch test confirms that even if the surface of the STES coating is destroyed, the revealed surface will also present superhydrophobicity. Simultaneously, the STES coating has good adhesion strength that maintains excellent superhydrophobicity under ultrasonic treatment, finger rubbing, and severe friction due to the contribution of ethyl α-cyanoacrylate. Therefore, the STES coating has both great phase change behaviors and remarkable superhydrophobic properties to resist the erosion of the natural environment, which will pave the way for its application in practice.
我们提出了一种简便有效的方法，用于大规模制备基于聚二乙烯基苯（PDVB）纳米管（NTs）的具有储热能力和超疏水性的超疏水热能存储（STES）可喷涂涂层。在此，通过便捷的喷涂将STES涂层应用于木材上，并且PDVB NTs在STES涂层中发挥着不可或缺的作用。一方面，由于PDVB NTs的亲脂性以及PDVB NTs与熔化的工业石蜡（IPW）之间的毛细作用力，PDVB NTs作为支撑材料吸附并防止IPW泄漏。通过提高PDVB NTs的比表面积，PDVB NTs对IPW表现出很大的负载能力（78.29 wt%），这有助于STES涂层具有较大的熔化潜热（119.6 J/g）。此外，STES涂层具有良好的热可靠性和热能转换能力。另一方面，PDVB NTs作为骨架与含氟SiO纳米颗粒结合形成STES涂层的分级结构，这赋予STES涂层令人满意的疏水性能，水接触角为157.7°，滑动角为1.3°。此外，该涂层具有出色的抗腐蚀性液体和抗紫外线辐射能力以及自清洁性能。令人惊讶的是，刀划试验证实即使STES涂层的表面被破坏，露出的表面也会呈现超疏水性。同时，由于α-氰基丙烯酸乙酯的作用，STES涂层具有良好的附着强度，在超声处理、手指摩擦和剧烈摩擦下仍能保持优异的超疏水性。因此，STES涂层兼具出色的相变行为和显著的超疏水性能，以抵抗自然环境的侵蚀，这将为其实际应用铺平道路。
