基于有机硅改性聚氨酯弹性体的机翼前缘抗砂蚀防冰涂料  

Anti-sand erosion and anti-icing coating for leading edge of airfoil based on silicone modified polyurethane elastomer

作　　者：余明明 张昳 梁璐 王智勇 YU Mingming;ZHANG Yi;LIANG Lu;WANG Zhiyong(Department of the Stealth Material and Coating,AECC Beijing Institute of Aeronautical Materials,Beijing 100095,China)

机构地区：[1]中国航发北京航空材料研究院隐身与涂料所,北京100095

出　　处：《航空材料学报》2021年第5期28-34,共7页Journal of Aeronautical Materials

摘　　要：机翼前缘的抗砂蚀防冰涂层技术是国内外亟须解决的重要课题。以端羟基聚烯烃树脂(HTPO)和低表面能的端羟基聚硅氧烷(HPSO)树脂为软段,异佛尔酮二异氰酸酯(IPDI)及1,4-丁二醇(BDO)为硬段,通过聚合加成反应制备有机硅改性聚氨酯弹性体(Si-PUE)。以其为基体树脂,掺杂功能颜填料制备有机硅改性弹性聚氨酯涂层(Si-PUEc),并对其疏水性能、拉伸性能、抗砂蚀性能和防冰性能进行研究。结果表明:Si-PUEc的表面水接触角(water contact angle,WCA)为108°,具有良好的疏水性;对Si-PUEc的防冰性能进行考察,冰黏附强度仅为68.04 kPa,低于铝板表面冰黏附强度(235.36 kPa)的三分之一;此外,Si-PUEc的抗张强度为14.03 MPa,断后伸长率为370%,表现出优异的拉伸性能,经过砂尘实验后,Si-PUEc表面完好,无破损、开裂等漆膜缺陷,WCA仍然保持在108°。湿热老化实验前后,Si-PUEc的疏水性能、防冰性能、应力应变性能无明显变化。The anti-sand erosion and anti-icing coating technique is highly demanded in the leading edge of the airfoil surface.Herein,an anti-sand erosion and anti-icing coating(Si-PUEc)based on the silicone-modified polyurethane elastomer(Si-PUE)was fabricated and its hydrophobicity,tensile property,sand erosion resistance and anti-icing performance were investigated.The polyurethane elastomer was synthesized by a polyaddition reaction of hydroxy-terminated polyolefin resin and polyolefin resin as soft segments with isophorone diisocyanate and 1,4-butanediol as hard segments.The research results show that the Si-PUEc with a high water contact angle(WCA)of 108°exhibits a weak ice adhesion strength of 68.04 kPa,less than a third of that of the original bare aluminum plate surface(235.26 kPa).Moreover,the tensile strength of Si-PUEc is 14.03 MPa and the elongation at break is 370%,showing excellent tensile properties.After the sand and dust test,the surface of Si-PUEc is intact,without damage,cracking and other defects of the film,and the WCA remains at 108°.Before and after the damp-heat test,the hydrophobic performance,anti-icing performance,and stress-strain performance of Si-PUEc are not changed significantly.The distinctive composition and morphology of the polyurethane elastomer serves as the key that opens up a new strategy to design hydrophobic coatings for robust and durable anti-sand erosion and anti-icing coating applications in the leading edge of the airfoil surface.

关 键 词：聚氨酯弹性体 防冰涂层 疏水性 拉伸性 抗砂蚀性 

分 类 号：TB32[一般工业技术—材料科学与工程]