| 引用本文: | 李晓丹,刘小平,刘宏宇,何瑞,王锋,胡心雨,凌贤长.原位聚合法制备聚苯胺改性MoS2及其环氧复合涂层的防腐性能[J].材料科学与工艺,2021,29(6):18-26.DOI:10.11951/j.issn.1005-0299.20210186. |
| LI Xiaodan,LIU Xiaoping,LIU Hongyu,HE Rui,WANG Feng,HU Xinyu,LING Xianzhang.Preparation of polyaniline modified MoS2 by in-situ polymerization and anti-corrosion properties of its epoxy composite coating[J].Materials Science and Technology,2021,29(6):18-26.DOI:10.11951/j.issn.1005-0299.20210186. |
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| 原位聚合法制备聚苯胺改性MoS2及其环氧复合涂层的防腐性能 |
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李晓丹1,刘小平1,刘宏宇1,何瑞1,王锋1,胡心雨1,2,凌贤长2
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(1．催化与环境新材料重庆市重点实验室(重庆工商大学 环境与资源学院),重庆 400067;2．哈尔滨工业大学 重庆研究院,重庆 401151)
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| 摘要: |
| 为提高环氧涂料的防腐性能,本文引入MoS2纳米片作为阻隔剂,并在MoS2纳米片表面原位聚合聚苯胺(PANI),制备了夹层结构i-PANI@MoS2纳米片,利用PANI提高涂层的导电性,达到阳极钝化的效果。研究发现,当PANI与MoS2的摩尔配比增大到7∶1时,MoS2片层表面被PANI均匀覆盖,改性效果最好。与环氧树脂复合后,i-PANI@MoS2-7纳米片在环氧树脂中均匀分散,复合涂层导电率提高,PANI与MoS2起到了协同防腐作用,此时i-PANI@MoS2纳米片既作为涂层中的阻隔剂,又作为电化学腐蚀保护剂,因此复合涂层具有最大的阻抗值、最大腐蚀电压以及最小的腐蚀电流密度,防腐性能优异。但PANI与MoS2配比进一步增大,MoS2纳米片表面的聚苯胺会发生团聚,导致复合涂层的防腐性能下降。 |
| 关键词: 防腐 聚苯胺 MoS2 环氧 复合涂层 |
| DOI：10.11951/j.issn.1005-0299.20210186 |
| 分类号:TQ311 |
| 文献标识码:A |
| 基金项目:国家自然科学基金面上项目(42172321)；国家自然科学基金青年基金项目(51403025)；重庆市技术创新与应用发展专项面上项目(cstc2019jscx-msxmX0050)；重庆市教委科学技术研究项目(KJQN201900829,KJQN202100830)；重庆市高校工业污染控制新技术创新群体项目(CXQT19023)；重庆工商大学青年项目(1952015). |
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| Preparation of polyaniline modified MoS2 by in-situ polymerization and anti-corrosion properties of its epoxy composite coating |
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LI Xiaodan1, LIU Xiaoping1, LIU Hongyu1, HE Rui1, WANG Feng1, HU Xinyu1,2, LING Xianzhang2
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(1. Chongqing Key Laboratory of Catalysis and New Environmental Materials (College of Environment and Resources, Chongqing Technology and Business University), Chongqing 400067, China; 2. Chongqing Research Institute, Habin Institute of Technology, Chongqing 401151, China)
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| Abstract: |
| In order to improve the anti-corrosion performance of epoxy coatings, MoS2 nanosheets were introduced as barrier, and polyaniline (PANI) was in-situ polymerized on the surface of MoS2 nanosheets to prepare sandwich i-PANI@MoS2 nanosheets. PANI could improve the conductive properties of coatings, so as to achieve anode passivation. Results show that when the molar ratio of PANI to MoS2 was up to 7∶1, the surface of MoS2 nanosheets was evenly covered by PANI with the best modification effect. After compounding with epoxy resin, i-PANI@MoS2-7 nanosheets were evenly dispersed in the epoxy resin. The conductivity of the composite coating was increased. It was due to the synergistic anti-corrosion effect of PANI and MoS2, namely i-PANI@MoS2 nanosheets could not only be used as physical barriers, but also as electrochemical corrosion protectors in coatings. Thus, the composite coating had the maximum impedance value, the maximum corrosion voltage, and the minimum corrosion current density with excellent anti-corrosion performance. However, with the further increase in the ratio of PANI to MoS2, the PANI on the surface of MoS2 nanosheets agglomerated, resulting in the decline in the anti-corrosion performance of the composite coating. |
| Key words: anti-corrosion polyaniline MoS2 epoxy composite coating |
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