毕业设计(论文)--疏水涂层在环境机械上的应用与研究.docx

PAGE 毕业设计(论文) 疏水涂层在环境机械上的 应用研究 第PAGE \* MERGEFORMATV页 疏水涂层在环境机械上的应用研究 摘 要 环境保护是当今世界四大支柱产业之一，是今后世界产业发展的热点和重点。城市环保中垃圾的处理是一项重要的内容，处理垃圾时所用的环境机械因为其特殊的使用环境而易被污染。针对这一现状，本课题研究了一种疏水涂层来提高设备的防污性。 通过偶联剂改性后的二氧化硅纳米颗粒和有机硅树脂制成混合液，采用喷涂法制备出了具备超疏水性的复合涂层。研究了二氧化硅、硅树脂不同含量配比以及喷涂工艺对涂层疏水性能的影响, 结果表明，复合涂层的接触角随二氧化硅含量的增加而增加。在二氧化硅含量大于4.5%（质量分数）时，涂层显现超疏水性；当二氧化硅含量为5.6%（质量分数）、硅树脂含量为27.5%（质量分数）时,涂层与水的接触角达到152.4o。通过扫描电子显微镜（SEM）观察涂层表面的微观结构,发现超疏水性的涂层具备微纳复合阶层结构,类球状突起粒径在20 QUOTE m左右，类球状突起上分布纳米团聚颗粒，直径约100nm。这种类似荷叶表面的微纳复合粗糙结构,结合硅树脂的低表面能，使得复合涂层具备了超疏水性能。在环保机械上制备此类涂层，将有助于改善设备的防污性。 关键词：环境机械，疏水涂层，喷涂工艺，微纳复合结构  The Application Research of Hydrophobic and Oleophobic Coating in Environmental Machinery Abstract Environmental protection industry is current world one of four big pillar industries, is the future of world industry development focus.City Environmental Protection of city garbage treatment is an important content of garbage disposal, the environmental machinery because of its special use environment and prone to corrosion and pollution.In view of this situation we design a hydrophobic coating to improve equipment fouling resistance. We use the coupling agent modified silica nanoparticles and a silicone resin mixed liquid, spray coating was prepared with super hydrophobic composite coating. And we study of silicon dioxide, silicon resin content of different proportion on hydrophobic coating performance, the results showed that the contact angle of composite coating with silicon dioxide content increased.In the silica content is greater than 4.5%(mass fraction), coating show superhydrophobic; when the silica content of 5.6%(mass fraction), silicone resin content is 27.5%(mass fraction), coating and water contact angle reaches 152.4o.Through scanning electron microscopy (SEM) observation coating surface microstructure, found super hydrophobic coating with micro-nano composite stratum structure, spherical protrusions particle diameter is about 20 μ m, spherical protrusions on the distribution of nan