涂层弹性模量对结冰附着强度的影响

Effect of elastic modulus of coating on ice-adhesion strength on substrate

通过对铝合金及聚甲基丙烯酸甲酯(PMMA)基底涂覆不同弹性涂层进行表面改性,研究了涂层弹性对基底结冰附着强度的作用。用单组份室温硫化硅橡胶WH-705与BOPP进行对比。采用水杯制冰结冰强度测试试验法,以结冰切向附着力为指标,测量铝合金和PMMA两种材料(典型金属和非金属材料)基底表面未涂覆和涂覆弹性涂层后的结冰附着强度。试验结果表明,相对于标准基底,涂覆弹性涂层后基底表面结冰强度有显著变化。其中,涂覆硫化硅橡胶的铝表面结冰强度降低73.27%,PMMA表面降低14.85%。分析表明,涂层的弹性系数、分布规律等对结冰附着强度的影响显著。本文研究可为弹性涂层在防除冰方面的实际应用提供依据。

In this paper,aluminum and Polymethylmethacrylate(PMMA)were used as experimental substrates,BOPP and RTV-1 WH-705 were used as two kinds of different elastic coatings,and the ice-adhesion strength on the coated substrate was measured with an Al-cup for ice making.The tangential ice-adhesion strength testing equipment was used to measure the ice-adhesion strength on uncoated and coated aluminum and PMMA substrates with the elastomeric coatings.Results show that elastic modulus of the coating has significant effect on the ice-adhesion strength on the substrates.Compared with uncoated substrates,the ice-adhesion strength on substrates coated with BOPP and RTV-1 WH-705 is decreased obviously.the ice-adhesion strength on aluminum substrate coated with elastic RTV-1 WH-705 is deduced by 73.27%,and that on PMMA substrate coated with elastic RTV-1 WH-705 is deduced by 14.85%.It is shown that the elastic coefficient and distribution of the coating have significant effects on the ice-adhesion strength.Thus rational choosing coatingsand coating distribution on substrate can effectively improve the anti-icing an de-icing properties of the substrates.