当前位置:首页>南京>南京航空航天大学【双层嵌入结构环氧基超疏水涂层:机械耐久性与耐腐蚀性】

南京航空航天大学【双层嵌入结构环氧基超疏水涂层:机械耐久性与耐腐蚀性】

  • 2026-04-02 05:09:59
南京航空航天大学【双层嵌入结构环氧基超疏水涂层:机械耐久性与耐腐蚀性】

南京航空航天大学【双层嵌入结构环氧基超疏水涂层:机械耐久性与耐腐蚀性】

【引用格式】Wang H, Zhu W, Shen Y, et al. Mechanical durability and corrosion resistance of epoxy based superhydrophobic coating with double-layer embedded structure[J]. Polymer, 2026, 343: 129467.

海洋等高盐高湿环境中,超疏水涂层易与基材剥离、耐腐蚀性不足,限制其对金属的长效防护

本研究设计双层嵌入结构环氧基超疏水涂层(FCEC):底层为环氧粘结层,顶层为氟化碳纳米管(F-CNT)/ 环氧复合层。F-CNT 调控表面微纳乳突结构,形成稳定 “空气 cushion” 阻挡腐蚀介质;环氧双层嵌入增强与 Q235 碳钢基材的结合力,粘结强度达 30 MPa。涂层 WCA 最高 162.41°,经 500 次磨损、350 次胶带剥离后仍保持疏水;盐雾测试 30 天仅轻微腐蚀,极化电阻达 2.8×10⁶ Ωcm²,为海洋、工业环境金属防护提供耐用方案

1.双层嵌入结构增强附着力

底层环氧与基材紧密结合,顶层 F-CNT / 环氧嵌入底层,粘结强度 30 MPa,较硅烷偶联剂粘结层提升 33.3%

2.F-CNT 调控表面功能

F-CNT 既降低表面能,又构建微纳乳突结构,形成 “空气 cushion”,显著阻碍腐蚀介质渗透

3.极端机械耐久性

可耐受 500 次砂纸磨损、350 次胶带剥离、120 h 水流冲击,仍保持疏水性能,解决超疏水涂层易磨损缺陷

4.强耐腐蚀性

盐雾环境中 30 天仍有效防护,电化学阻抗远高于纯环氧涂层,对 Cl⁻、Na⁺等腐蚀离子阻隔性优异

图1. CNT 改性过程。

图2. F-CNT@EP 超疏水涂层的制备过程。

图3. (a) 水滴在改性前纳米颗粒上的状态;(b) 水滴在改性后纳米颗粒上的状态;(c) 改性前纳米颗粒的微观形貌;(d) 改性后纳米颗粒的微观形貌;(e) 纳米颗粒改性前后的 FTIR 光谱;(f) 纳米颗粒改性前后的 XPS 全谱;(g) CNT 的高分辨率 C 1s 谱;(h) F-CNT 的高分辨率 C 1s 谱;(i) F-CNT 的高分辨率 F 1s 谱;(j) F-CNT 的高分辨率 O 1s 谱;(k) F-CNT 的高分辨率 Si 2p 谱。

图4.(a) FCEC 接触角与 F-CNT 含量的关系;(b) 纯环氧树脂表面的微观形貌;(c) F-CNT 含量为 30% 时的微观形貌;(d) FCEC 表面的 EDS 分析。

图5.(a–d) 不同 F-CNT 含量下的三维形貌图像

图6.(a) 不同粘结层的拉拔强度;(b) 以硅烷偶联剂为粘结层的耐磨测试;(c) 胶带剥离试验及胶带附着力损失示意图;(d) 摩擦磨损试验及摩擦损失示意图

图 7:(a) FCEC 在 3.5% NaCl 溶液中的极化曲线;(b, d) 超疏水涂层的电化学阻抗谱 Bode 图;(c, e) 超疏水涂层的电化学阻抗谱 Nyquist 图;(f) Q235/EP/30%/60% 样品在 3.5 wt% NaCl 水溶液中浸泡后的等效电路模型。

图 8:(a–c) 不同时间段的盐雾试验照片;(d–f) 盐雾试验前后样品的表面形貌;(g) 盐雾试验前后表面元素分布;(h) 盐雾试验后涂层表面的三维形貌图像;(i) 盐雾试验后涂层表面的 XPS 分析。

图 9:(a, b) 盐雾腐蚀后超疏水涂层的电化学阻抗谱 Bode 图;(c–f) 盐雾腐蚀后超疏水涂层的电化学阻抗谱 Nyquist 图;(g) 盐雾试验前样品在 3.5 wt% NaCl 水溶液中的等效电路模型;(h) 10 天盐雾试验后样品在 3.5 wt% NaCl 水溶液中的等效电路模型;(i) 20 天和 30 天盐雾试验后样品在 3.5 wt% NaCl 水溶液中的等效电路模型。

图 10:(a) 超疏水涂层的防腐机理;(b) 超疏水涂层长期损伤机理模型图。

https://doi.org/10.1016/j.polymer.2025.129467

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  1. CONNECT:[ UseTime:0.000467s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000605s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000309s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000312s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000620s ]
  6. SELECT * FROM `set` [ RunTime:0.000307s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000623s ]
  8. SELECT * FROM `article` WHERE `id` = 482364 LIMIT 1 [ RunTime:0.000710s ]
  9. UPDATE `article` SET `lasttime` = 1775405115 WHERE `id` = 482364 [ RunTime:0.002040s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000235s ]
  11. SELECT * FROM `article` WHERE `id` < 482364 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000386s ]
  12. SELECT * FROM `article` WHERE `id` > 482364 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000346s ]
  13. SELECT * FROM `article` WHERE `id` < 482364 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.003468s ]
  14. SELECT * FROM `article` WHERE `id` < 482364 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000836s ]
  15. SELECT * FROM `article` WHERE `id` < 482364 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.001155s ]
0.095451s