透波疏水涂层制备及性能研究

Preparation and properties study of wave-transmitting and hydrophobic coatings

透波涂层作为天线罩最外层材料,不仅要对天线罩起到保护和美观的作用,还要能实现透波的电磁功能。天线罩表面涂覆疏水涂层能有效降低水滴在其表面黏附性,减少水滴对天线罩透波性能的影响。本文通过在低介电的氟碳树脂涂层中引入介孔二氧化硅粒子,构造了疏水表面。研究结果表明:10wt%二氧化硅粒子涂层体系疏水角达到129.4°;同时,偶联剂改性介孔二氧化硅粒子提高了粒子在溶液中的分散性。对比研究涂层体系的耐冲击性能、铅笔硬度、附着力、介电性能、透波性能,结果表明10wt%改性介孔二氧化硅粒子涂层具有优异的综合性能,实现了天线罩涂层透波、疏水功能的一体化。

As the outermost material of the radome,the wave-transmitting coating not only protects and beautifies the radome,but also realizes the electromagnetic function of wave-transmitting.The hydrophobic coating on the surface of the radome can effectively reduce the adhesion of water droplets on its surface and reduce the influence of water droplets on the wave transmission performance of the radome.In this paper,a hydrophobic surface was constructed by incorporating mesoporous silica particles in a low-dielectric fluorocarbon resin coating.The research results show that the hydrophobic angle of the 10wt%silica particle coating system reaches 129.4°.At the same time,the modification of the mesoporous silica particles by the coupling agent improves the dispersibility of the particles in solution.We comparatively studied the impact resistance,pencil hardness,adhesion,dielectric properties,wave transmission properties of the coating systems.The results show that the coating ratio of modified 10wt%mesoporous silica particles has excellent comprehensive properties and wave-transmitting properties,and realizes the integration of wave-transmission and hydrophobic function of the randome coatings.