纳米SiO2杂化环氧基氟代树脂涂层的制备与性能

Preparation and Properties of Nano-SiO_2 Hybrid Fluorinated Epoxy Resin Coating

以正硅酸乙酯(TEOS)和双[3-(三乙氧基硅烷)丙基]胺(BTA)为水解前驱体,十二烷基苯磺酸钠(SDBS)为表面活性剂,利用溶胶-凝胶法制备了氨基纳米硅溶胶(TB),将其与环氧基氟代丙烯酸树脂(FBSA)上的环氧基开环共聚,得到一种纳米杂化树脂(NA-FB),并以NA-FB为成膜物质,制得了纳米改性透明涂层。用FTIR、XPS、TEM和SEM对产物的形貌、结构及性能进行了表征和测试,探讨了SDBS用量对纳米TB体系稳定性和黏度的影响及纳米TB用量对涂层性能的影响。结果表明:纳米TB在微观上表现出多相分离的微球结构,分散均匀;SDBS的质量浓度为0.5 g/L时,纳米TB的稳定性可达60 d,黏度为2.8 m Pa·s;纳米TB的质量分数为10%(以FBSA质量计)时,涂层的硬度达到5H,涂层表面的接触角可达138°,附着力仍保持0级,且涂层表现出较高的透明性。

Amino-containing silicon sol（TB） was prepared via a sol-gel method using ethyl orthosilicate（TEOS） and double [3-（triethoxy silane） propyl] amine（BTA） as precursors,sodium dodecyl benzene sulfonate（SDBS） as the surfactant,respectively.Subsequently,a ring opening copolymerization reaction between fluorinated epoxy acrylic resin（FBSA） and TB led to a nano hybrid resin（NA-FB）.And nano-hybrid transparent coating was prepared by NA-FB.The structure,morphology and properties of the obtained samples were studied by FTIR,XPS,TEM and SEM.The effect of SDBS amount on stability and viscosity of TB system was investigated and TB amount was varied to study its influence on coating performance.The results indicated that nano TB exhibited microspheres structure of multiphase separation and uniform dispersion.Nano-TB had stability of 60 d and viscosity of 2.8 mPa·s when SDBS concentration was 0.5 g/L.The hardness,contact angle and adhesion of the coating containing mass fraction of 10% TB（of FBSA） reached 5H,138° and 0 level,respectively.And the coating showed high transparency.