通过静电纺丝法在铝合金上沉积的用于航空航天应用的憎冰防腐涂层。

Icephobic and Anticorrosion Coatings Deposited by Electrospinning on Aluminum Alloys for Aerospace Applications.

作者信息

Vicente Adrián, Rivero Pedro J, García Paloma, Mora Julio, Carreño Francisco, Palacio José F, Rodríguez Rafael

机构信息

Engineering Department, Campus de Arrosadía S/N, Public University of Navarre, 31006 Pamplona, Spain.

Institute for Advanced Materials and Mathematics (INAMAT2), Campus de Arrosadía S/N, Public University of Navarre, 31006 Pamplona, Spain.

出版信息

Polymers (Basel). 2021 Nov 28;13(23):4164. doi: 10.3390/polym13234164.

Abstract

Anti-icing or passive strategies have undergone a remarkable growth in importance as a complement for the de-icing approaches or active methods. As a result, many efforts for developing icephobic surfaces have been mostly dedicated to apply superhydrophobic coatings. Recently, a different type of ice-repellent structure based on slippery liquid-infused porous surfaces (SLIPS) has attracted increasing attention for being a simple and effective passive ice protection in a wide range of application areas, especially for the prevention of ice formation on aircrafts. In this work, the electrospinning technique has been used for the deposition of PVDF-HFP coatings on samples of the aeronautical alloy AA7075 by using a thickness control system based on the identification of the proper combination of process parameters such as the flow rate and applied voltage. In addition, the influence of the experimental conditions on the nanofiber properties is evaluated in terms of surface morphology, wettability, corrosion resistance, and optical transmittance. The experimental results showed an improvement in the micro/nanoscale structure, which optimizes the superhydrophobic and anticorrosive behavior due to the air trapped inside the nanotextured surface. In addition, once the best coating was selected, centrifugal ice adhesion tests (CAT) were carried out for two types of icing conditions (glaze and rime) simulated in an ice wind tunnel (IWT) on both as-deposited and liquid-infused coatings (SLIPs). The liquid-infused coatings showed a low water adhesion (low contact angle hysteresis) and low ice adhesion strength, reducing the ice adhesion four times with respect to PTFE (a well-known low-ice-adhesion material used as a reference).

摘要

作为除冰方法或主动方法的补充,防冰或被动策略的重要性显著增加。因此,许多开发憎冰表面的努力大多致力于应用超疏水涂层。最近,一种基于注入液体的多孔光滑表面(SLIPS)的新型防冰结构,因其在广泛应用领域中是一种简单有效的被动防冰方式,特别是在防止飞机结冰方面,而受到越来越多的关注。在这项工作中,通过使用基于确定诸如流速和施加电压等工艺参数的适当组合的厚度控制系统,采用静电纺丝技术在航空合金AA7075样品上沉积PVDF - HFP涂层。此外,从表面形态、润湿性、耐腐蚀性和光学透过率方面评估了实验条件对纳米纤维性能的影响。实验结果表明,微/纳米尺度结构得到了改善,由于纳米纹理表面内 trapped 的空气,优化了超疏水和防腐性能。此外,一旦选择了最佳涂层,就在冰风洞中对沉积态和注入液体的涂层(SLIPs)模拟的两种结冰条件( glaze 和rime)进行离心冰附着力测试(CAT)。注入液体的涂层表现出低水附着力(低接触角滞后)和低冰附着力强度,相对于用作参考的众所周知的低冰附着力材料PTFE,冰附着力降低了四倍。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/04a0/8659825/b70d52940d0c/polymers-13-04164-g001.jpg

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