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材料研究学报  2016, Vol. 30 Issue (2): 131-140    DOI: 10.11901/1005.3093.2015.042
  本期目录 | 过刊浏览 |
聚苯胺微乳液的制备及与叔氟丙烯酸酯乳液复合涂层的防腐性能*
李玉峰1(), 祝晶晶2, 高晓辉2, 徐莹1
1. 齐齐哈尔大学材料科学与工程学院 齐齐哈尔 161006
2. 齐齐哈尔大学化学与化学工程学院 齐齐哈尔 161006
Preparation of Polyaniline Microemulsion and Anticorrosion Performance of Its Composite Coatings with Versatate-Fluoro-Acrylate Emulsion
LI Yufeng1,**(), ZHU Jingjing2, GAO Xiaohui2, XU Ying1
1. College of Material Science and Engineering, Qiqihar University, Qiqihar 161006, China
2. College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar 161006, China
引用本文:

李玉峰, 祝晶晶, 高晓辉, 徐莹. 聚苯胺微乳液的制备及与叔氟丙烯酸酯乳液复合涂层的防腐性能*[J]. 材料研究学报, 2016, 30(2): 131-140.
Yufeng LI, Jingjing ZHU, Xiaohui GAO, Ying XU. Preparation of Polyaniline Microemulsion and Anticorrosion Performance of Its Composite Coatings with Versatate-Fluoro-Acrylate Emulsion[J]. Chinese Journal of Materials Research, 2016, 30(2): 131-140.

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摘要: 

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.
关键词 ： 有机高分子材料,  聚苯胺,  微乳液,  叔氟丙烯酸酯,  复合涂层,  防腐蚀    
Abstract：

Polyaniline (PANI) microemulsion, which is miscible with acrylate emulsion, was synthesized with sodium dodecyl sulfate (SDS) as emulsifier. PANI/VFAc composite emulsions were prepared by blending PANI microemulsion and the versatate modified acrylate emulsion containing fluorine (versatate-fluoro-acrylate emulsion, VFAc). Then PANI/VFAc composite emulsion was applied on Q235 steel surface to prepare the composite anticorrosion coatings. The molecular structure and particle size of PANI were characterized by Fourier transformation infrared spectrum (FT-IR), transmission electron microscopy (TEM) and particle size analyzer. The influence of different proportion of PANI microemulsion and VFAc emulsion on properties such as hydrophobic, wet adhesion and anticorrosion of the formed coatings was studied. The results show that the composite coating exhibits the best hydrophobic property and corrosion resistance when the proportion of PANI microemulsion and VFAc emulsion is 1: 2. The anticorrosion mechanism of PANI/VFAc composite coating on Q235 steel was proposed.
Key words： organic polymer materials    polyaniline    microemulsion    versatate-fluoro-acrylate    composite coatings    anticorrosion
收稿日期: 2015-01-20     
ZTFLH:  TB324  
基金资助:* 黑龙江省博士后科研启动金LBH-Q13171和黑龙江省自然科学基金面上项目E201138资助项目
作者简介: 通讯作者：李玉峰, 教授
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https://www.cjmr.org/CN/10.11901/1005.3093.2015.042      或      https://www.cjmr.org/CN/Y2016/V30/I2/131

图1  PANI的红外光谱图
图2  PANI乳胶粒子的透射电子显微镜照片
图3  PANI微乳液的粒径分布
图4  不同比例PANI/VFAc复合涂层的接触角与接触时间的关系
PANI/VFAc Water absorption /% Wet adhesion
/grade		 Corrosion rate
/mma-1		 Rp / Ω Icorr / Acm-2 Ecorr / V PEF / %
PANI ---- 5 3.20×10-2 4.56×103 9.73×10-6 -0.49 ----
3∶1 13.55 2 9.38×10-3 3.27×104 7.97×10-7 -0.41 86.06
2∶1 6.82 1 1.30×10-3 2.37×105 1.10×10-7 -0.35 98.08
1∶1 3.29 0 1.03×10-3 3.00×105 8.72×10-8 -0.30 98.48
1∶2 2.11 0 1.74×10-4 1.76×106 1.48×10-8 -0.28 99.74
1∶3 2.08 0 5.59×10-4 5.49×105 4.75×10-8 -0.36 99.17
表1  涂覆PANI/VFAc复合涂层Q235钢的吸水率,湿附着力及极化曲线拟合数据
图5  涂覆不同比例PANI/VFAc复合涂层的Q235钢的极化曲线
图6  涂覆PANI和不同比例的PANI/VFAc 的涂层的Q235钢的电化学阻抗谱
图7  不同浸泡时间的涂层的电化学阻抗谱的等效电路
图8  涂覆PANI和不同比例PANI/VFAc 的涂层的Q235钢的盐雾试验照片
图9  Q235钢表面和在3.5% NaCl溶液中浸泡24h后PANI/VFAc涂层下Q235钢表面的扫描电子显微镜照片
图10  Q235钢表面和在3.5% NaCl溶液中浸泡24 h后PANI/VFAc涂层下Q235钢表面的X-射线光电子能谱 (全谱和O 1s谱)
图11  PANI/VFAc复合涂层对Q235钢的防腐蚀机理
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