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以十二烷基硫酸钠(SDS)为乳化剂合成了能与丙烯酸酯类乳液混溶的聚苯胺(PANI)微乳液,然后将PANI微乳液混入叔碳酸乙烯酯改性的含氟丙烯酸酯(叔氟丙烯酸酯,VFAc)乳液中在Q235钢表面制备出复合防腐涂层。用红外光谱(FTIR)和透射电子显微镜(TEM)表征PANI的结构并测试PANI微乳液的粒径,研究了PANI微乳液与VFAc乳液的质量比对复合涂层疏水性、湿附着力及防腐蚀性能的影响。结果表明,当PANI微乳液与VFAc乳液质量比为1∶2时复合涂层有较好的疏水性和防腐蚀性能。提出了复合涂层的防腐蚀机理。
Polyaniline (PANI) microemulsions which can be miscible with acrylic emulsions were synthesized by using sodium dodecyl sulfate (SDS) as emulsifier. Then PANI microemulsions were mixed with vinyl versatate modified fluorinated acrylates Tert-fluoro acrylate, VFAc) emulsion in Q235 steel surface prepared composite anti-corrosion coating. The structure of PANI was characterized by FTIR and TEM, and the particle size of PANI microemulsion was tested. The effects of the mass ratio of PANI microemulsion to VFAc emulsion on the hydrophobicity, wet adhesion and anti-corrosion The impact of performance. The results show that the composite coating has good hydrophobicity and corrosion resistance when the mass ratio of PANI microemulsion to VFAc emulsion is 1: 2. Anticorrosion mechanism of composite coatings was proposed.