超疏水复合涂层的制备和性能研究

doi:10.11901/1005.3093.2017.391

材料研究学报

2018, Vol. 32

Issue (7): 502-512 DOI: 10.11901/1005.3093.2017.391

研究论文

本期目录 | 过刊浏览

超疏水复合涂层的制备和性能研究

高硕洪^1,², 刘敏²(

), 庞晓军², 张小锋², 邓畅光², 梁兴华², 邓春明²

1 广东工业大学材料与能源学院广州 510006
2 广东省新材料研究所现代材料表面工程技术国家工程实验室广东省现代表面工程技术重点实验室广州 510651

Fabrication and Properties of Super-hydrophobic Composite Coatings

Shuohong GAO^1,², Min LIU²(

), Xiaojun PANG², Xiaofeng ZHANG², Changguang DENG², Xinghua LIANG², Chunming DENG²

1 School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China
2 Guangdong Institute of New Materials, National Engineering Laboratory for Modern Materials Surface Engineering Technology, Key Lab of Gunagdong for Modern Surface Engineering Technology, Guangzhou 510651, China

引用本文:

高硕洪, 刘敏, 庞晓军, 张小锋, 邓畅光, 梁兴华, 邓春明. 超疏水复合涂层的制备和性能研究[J]. 材料研究学报, 2018, 32(7): 502-512.
Shuohong GAO, Min LIU, Xiaojun PANG, Xiaofeng ZHANG, Changguang DENG, Xinghua LIANG, Chunming DENG. Fabrication and Properties of Super-hydrophobic Composite Coatings[J]. Chinese Journal of Materials Research, 2018, 32(7): 502-512.

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摘要:

采用大气等离子喷涂工艺(APS)制备了双层Al₂O₃/PTFE复合涂层和单层Al₂O₃-PTFE复合涂层两种涂层结构体系的疏水复合涂层,使用扫描电子显微镜(SEM)、3D表面形貌仪、显微硬度计、接触角测试仪和摩擦磨损试验机分别表征了复合涂层的微观形貌、相组成、粗糙度、硬度、疏水性能以及耐磨性能。评价复合涂层的性能并进而研究了Al₂O₃陶瓷作为粘结层和硬质颗粒填充相以及工艺参数对复合涂层的疏水性能和耐磨性能的影响。结果表明：无论Al₂O₃陶瓷作为粘结层还是硬质填充相添加到涂层中,都显著提高了单一PTFE涂层的摩擦学性能。Al₂O₃-PTFE复合涂层的耐磨性能优于Al₂O₃/PTFE复合涂层,两复合涂层的磨损率和摩擦系数依次为2.84×10^-5 mm³/N·m、9.97×10^-5 mm³/N·m和0.51、0.38;复合涂层的表面都具有良好的疏水性能,与水的静态接触角分别为155.4°和148.9°。良好的疏水性能源于表面粗糙的微纳米级突起结构和表面存在密集分布的低表面能氟化物的协同作用。进行摩擦磨损试验后表面的突起结构受到一定的破坏,涂层的疏水性能有所下降,但是Al₂O₃/PTFE复合涂层仍然具有超疏水性。

关键词 ：复合材料, 超疏水复合涂层, 大气等离子喷涂, 疏水性能, 耐磨性能

Abstract：

Composite coatings of double-layered Al₂O₃/PTFE and single-layered Al₂O₃-PTFE were prepared via atmospheric plasma spraying (APS) process. The morphology, phase composition, roughness, hardness, hydrophobic property and wear resistance of the composite coatings were characterized by scanning electron microscope (SEM), 3D topography tester, micro-hardness tester, contact angle tester and friction and wear tester respectively. The influence of Al₂O₃ bond coat, Al₂O₃ hard particle filling and different process parameters on the hydrophobic property and wear resistance of the composite coatings were assessed. Results show that the wear resistance of the single PTFE coating were improved significantly by inducing Al₂O₃ ceramic as a bond coat or as hard particle filling phase into the composite coatings; The wear resistance property of Al₂O₃-PTFE composite coatings was superior to that of the Al₂O₃/PTFE composite coatings, correspondingly the wear rate of which was 2.84×10^-5 mm³/N·m and 9.97×10^-5 mm³/N·m respectively, the friction coefficient is 0.51 and 0.38 respectively; While the surface of the two composite coatings showed good hydrophobic properties with static contact angle of 155.4° and 148.9° respectively, which may be attributed to the compacted micro-nano convex structure on the rough surface and the synergistic effect of fluoride with low surface energy distributed on the composite coating surface. After the friction and wear test, the surface structure of the two composite coatings was damaged, hence the hydrophobicity of the coatings degraded, even so, the Al₂O₃/PTFE composite coating still exhibits super-hydrophobicity.

Key words： composites superhydrophobic composite coatings atmospheric plasma spraying hydrophobic property wear-resistance

收稿日期: 2017-07-03

ZTFLH:

TG147

基金资助:国家重点研发计划(2017YFB0306100), 广东省科学院项目(2017GDASCX-0202);广东省科技计划(201313050800031, 201413050502008, 2014B070706026, 2013B061800053);广东省自然基金团队项目(2016A030312015)

作者简介:

作者简介高硕洪,男,1992年生,硕士

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https://www.cjmr.org/CN/10.11901/1005.3093.2017.391 或 https://www.cjmr.org/CN/Y2018/V32/I7/502

表1 双层Al2O3/PTFE涂层喷涂工艺参数

图1 等离子喷涂送粉示意图

表2 单层Al2O3-PTFE涂层喷涂工艺参数

图2 摩擦磨损试验机的工作示意图

图3 Al2O3/PTFE和Al2O3-PTFE复合涂层的表面形貌

图4 涂层颗粒的表面形貌

图5 Al2O3/PTFE和Al2O3-PTFE复合涂层的截面形貌

表3 涂层的力学性能

图6 Al2O3/PTFE和Al2O3-PTFE复合涂层表面的3D形貌

图7 Al2O3/PTFE复合涂层表面的EDS谱图

图8 Al2O3/PTFE复合涂层表面的EDS谱图

图9 Al2O3-PTFE复合涂层表面位置1的EDS成分分析

图10 微纳米结构利于实现超疏水的模型示意图

图11 Al2O3/PTFE和Al2O3-PTFE复合涂层静态接触角示意图

图12 Al2O3/PTFE和Al2O3-PTFE复合涂层的摩擦系数曲线

图13 Al2O3/PTFE和Al2O3-PTFE复合涂层表面磨痕形貌图

表4 复合涂层的摩擦磨损结果

图14 摩擦磨损后的Al2O3/PTFE和Al2O3-PTFE复合涂层静态接触角

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