超疏水聚苯胺胶囊的一步可控合成及其对有机涂层防腐性能的影响

doi:10.11902/1005.4537.2022.089

中国腐蚀与防护学报

2023, Vol. 43

Issue (2): 345-351 CSTR: 32134.14.1005.4537.2022.089 DOI: 10.11902/1005.4537.2022.089

中国腐蚀与防护学报编委、青年编委专栏

本期目录 | 过刊浏览

超疏水聚苯胺胶囊的一步可控合成及其对有机涂层防腐性能的影响

陈异凡¹, 孟凡帝¹^,²(

), 曲优异¹^,², 方芷晴¹^,², 刘莉¹, 王福会¹

^1.东北大学沈阳材料科学国家研究中心东北大学联合研究分部沈阳 110819
^2.东北大学材料科学与工程学院沈阳 110819

One-step Synthesis of Superhydrophobic Polyaniline Capsules and Its Effect on Corrosion Resistance of Organic Coatings

CHEN Yifan¹, MENG Fandi¹^,²(

), QU Youyi¹^,², FANG Zhiqing¹^,², LIU Li¹, WANG Fuhui¹

^1.Shenyang National Laboratory for Materials Science, Northeastern University, Shenyang 110819, China
^2.College of Material Science and Engineering, Northeastern University, Shenyang 110819, China

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摘要:

通过乳液聚合法，控制表面活性剂十二烷基苯磺酸钠 (SDBS) 的添加量，一步合成了具有超疏水性质、空心球形貌的聚苯胺胶囊，该微纳米空腔结构可实现缓蚀剂等物质的包覆功能。结果表明，不同表面活性剂添加量下的产物形貌均为空心球状，并且可实现水接触角由67°提升到152°的超疏水。将超疏水胶囊掺入涂层，在3.5%NaCl溶液中浸泡14 d后，低频阻抗模值为2.69×10¹⁰，与添加亲水性聚苯胺的环氧树脂涂层及不添加填料的环氧树脂涂层相比，涂层电阻超过一个数量级以上。其原因为粉末的超疏水性，增大了腐蚀介质在涂层中扩散阻力，同时由于长链烷基的掺杂，改善了聚苯胺粉末在环氧树脂中的相容性，提高了涂层致密性及耐蚀性。

关键词 ：聚苯胺, 超疏水, 空心球, 有机涂层

Abstract：

Polyaniline capsules with superhydrophobic and hollow spherical morphology were synthesized via emulsion polymerization method with different amount of surfactant sodium dodecylbenzenesulfonate (SDBS) as modification agent, in order to solve the problems of poor compatibility of polyaniline (PANI) with resin, and the lack of tight bonding interface in organic coatings. The results show that the morphologies of the prepared products with different surfactant additions are all hollow spherical, and their water contact angle can be increased from 67° to 152°, while it may be speculated that capsules with the inherent micro/nano cavity structure may be used to encapsulate corrosion inhibitors and other substances. Next, epoxy resin coatings without and with superhydrophobic capsules as coating fillers were prepared, and then comparatively tested in 3.5%NaCl solution for 14 d. It follows that the low-frequency impedance modulus value of the coatings with superhydrophobic capsules reaches c.a. 2.69×10¹⁰, in other word, the epoxy resin coatings with hydrophilic polyaniline as filler exhibit excellent corrosion resistance more than one order of magnitude superior to the blank ones. Which may be ascribed to that the super-hydrophobicity of the powder increases the diffusion resistance of the corrosive medium in the coating. At the same time, due to the doping of long-chain alkyl groups, the compatibility of polyaniline powder in epoxy resin is improved, therefore, the coating corrosion resistance is enhanced.

Key words： polyaniline superhydrophobic hollow sphere organic coating

收稿日期: 2022-03-31 32134.14.1005.4537.2022.089

ZTFLH:

TG174

基金资助:国家自然科学基金(52271052);国家自然科学基金(51901040)

作者简介: 陈异凡，男，1997年生，硕士生

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引用本文:

陈异凡, 孟凡帝, 曲优异, 方芷晴, 刘莉, 王福会. 超疏水聚苯胺胶囊的一步可控合成及其对有机涂层防腐性能的影响[J]. 中国腐蚀与防护学报, 2023, 43(2): 345-351.
Yifan CHEN, Fandi MENG, Youyi QU, Zhiqing FANG, Li LIU, Fuhui WANG. One-step Synthesis of Superhydrophobic Polyaniline Capsules and Its Effect on Corrosion Resistance of Organic Coatings. Journal of Chinese Society for Corrosion and protection, 2023, 43(2): 345-351.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2022.089 或 https://www.jcscp.org/CN/Y2023/V43/I2/345

图1 4种样品SEM图像

图2 4种粉末样品的红外光谱及XPS能谱

图3 N 1s的高分辨能谱

表1 产物中各种状态N的比例

图4 N 1s的高分辨能谱

图5 不同样品在树脂溶液中沉降不同时间的照片

图6 不同浸泡时间下的电化学阻抗谱及拟合电路

图7 低频阻抗及涂层电阻拟合结果

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