Abstract: ［Objective］To address the poor water resistance and limited mechanical stability ofconventional organic anti-oil coatings，as well as the gradual deterioration of surface hydrophilicity ininorganic hydrophilic coatings during service.［Methods］A zwitterion-bearing hybrid anti-oil coatingwas prepared by co-condensation of zwitterionic siloxane with tetraethyl orthosilicate（TEOS） and aqueous silica sol. The wettability，surface composition and morphology，optical transmittance，pencil hardness，and adhesion of the coatings were characterized，and the effect of zwitterionic siloxane content on anti-oil performance under both dry and wet conditions was systematically investigated.［Results］The zwitterionic siloxane content induced a transition in surface structure from an inorganic-featured morphology to a more uniform and compact hybrid architecture，while maintaining a transmittance higher than 91%. When the content of zwitterionic siloxane reached 75wt% of the total mass of TEOS and SiO₂ nanoparticles，the obtained coating exhibited the optimal overall performance， with a pencil hardness of 3H and an adhesion grade of 0. Even after immersion in water for 200 h，the water contact angle remained below 5°，and the coating exhibited underwater superoleophobicity against various vegetable oils.［Conclusion］ For low-to medium-viscosity oils and oil fume contaminants adhered under dry conditions，the coating also showed excellent water-displacement-driven oil removalwettability and easy-cleaning performance.

Key words: anti-oil coating, zwitterion, inorganic-organic hybrid coatings, silica, hydrophilic coatings

摘要： 【目的】解决空气环境中传统有机防油涂层耐水性和力学稳定性不足、无机亲水涂层表面性能易衰减等问题。【方法】将两性离子硅氧烷与正硅酸乙酯（ TEOS）、水性硅溶胶共缩合制备杂化防油涂层。并对涂层的润湿性、表面组成与形貌、透过率、铅笔硬度及附着力进行表征，重点考察了两性离子硅氧烷含量对涂层干湿态防油性能的影响。【结果】随着两性离子硅氧烷含量增加，涂层表面结构由无机特征转变为均匀致密的杂化特征，可见光透过率高于 91%。两性离子硅氧烷质量为 TEOS和 SiO₂纳米粒子总质量的 75%时，样品综合性能较优，铅笔硬度为 3H，划格试验为 0级，水浸泡 200 h后水接触角仍低于 5°，对多种植物油表现出水下超疏油性。【结论】对干态条件下黏附的黏性油及油烟，该涂层均表现出良好的水置换驱动的去油润湿行为和易清洁特性。

关键词: 防油涂层, 两性离子, 无机有机杂化涂层, 二氧化硅, 亲水涂层

CLC Number: 

• TQ637