为简化超疏水涂层的制备过程,提高耐磨性,以端羟基聚二甲基硅氧烷(HTPDMS)、微/纳米二氧化硅分2步改性双酚A型环氧树脂,涂层的固化过程采用紫外光固化技术,然后对涂层的表面性能进行了一系列的测试表征.探究了HTPDMS用量和二氧化硅用量对涂层接触角和其他性能的影响.结果表明,当HTPDMS添加量为环氧树脂质量的80%时,环氧树脂可获得最好的改性效果.当改性环氧树脂与微/纳米二氧化硅的质量比为10∶1.5∶1.5时,采用复配型光引发剂,紫外汞灯照射10 min,即可得到接触角>154°滚动角<1°的超疏水涂层.
To simplify the preparation process of super-hydrophobic coatings and improve its wear resistance, the bisphenol A epoxy resin is modified in two steps with hydroxyl-terminated polydimethylsiloxane(HTPDMS)and Micro/Nano silica.UV curing technology was used to cure the coatings.The surface properties of the coatings were characterized by static contact angle measurement, field emission scanning electron micro-scope(FESEM)and atomic force microscope(AFM).The effect of the amount of HTPDMS and silica on the contact angle and other properties of the cured coating was investigated.The results show that when the amount of HTPDMS added is 80% of the epoxy resin, the best modification effect on the epoxy resin cam be obtained.When the mass ratio of the modified epoxy resin to the Micro/Nano silica is 10∶1.5∶1.5, and a compound photo initiator and a UV mercury lamp are irradiated for 10 minutes, the super-hydrophobic coating can be obtained, with contact angle(CA)of >154° and rolling angle(RA)of <1°.
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