夏安南,郝秀清,钟国政,何燕茹,周金堂.羰基铁–环氧树脂基吸波材料疏水结构的制备及性能研究[J].表面技术,2022,51(5):312-324.
XIA An-nan,HAO Xiu-qing,ZHONG Guo-zheng,HE Yan-ru,ZHOU Jin-tang.Preparation of Hydrophobic Structure of Carbonyl Iron-Epoxy Resin Based Absorbing Material and Its Corrosion Resistance and Absorbing Properties[J].Surface Technology,2022,51(5):312-324 |
| 羰基铁–环氧树脂基吸波材料疏水结构的制备及性能研究 |
| Preparation of Hydrophobic Structure of Carbonyl Iron-Epoxy Resin Based Absorbing Material and Its Corrosion Resistance and Absorbing Properties |
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| DOI：10.16490/j.cnki.issn.1001-3660.2022.05.032 |
| 中文关键词: 吸波材料 疏水微结构 耐蚀性 皮秒激光加工 微细铣削加工 微波吸收性能 |
| 英文关键词:absorbing material hydrophobic microstructure corrosion resistance picosecond laser processing micro milling microwave absorption property |
| 基金项目:国家自然科学基金(51875285，52172295);中央高校基本科研业务费专项资金(NE2020005) |
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| Author | Institution |
| XIA An-nan | College of Mechanical & Electrical Engineering,Nanjing 210016, China |
| HAO Xiu-qing | College of Mechanical & Electrical Engineering,Nanjing 210016, China |
| ZHONG Guo-zheng | College of Mechanical & Electrical Engineering,Nanjing 210016, China |
| HE Yan-ru | College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China |
| ZHOU Jin-tang | College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China |
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| 中文摘要: |
| 目的 改善羰基铁–环氧树脂基电磁波吸收材料在海洋环境中的耐腐蚀性和电磁波吸收性能。方法 将皮秒激光加工与微细铣削技术相结合，在羰基铁–环氧树脂复合材料表面制备复合疏水微结构，采用单因素实验分别考察了栅格间距为30、20 μm时皮秒激光加工功率、扫描速度、扫描次数对所制备表面结构接触角的影响规律，采用扫描电子显微镜对激光加工后的结构形貌进行分析，筛选出疏水性能较好的激光加工参数;选用不同直径的微细铣刀对所筛选的激光参数加工后的表面进行微细铣削，得到复合疏水结构，并采用共聚焦显微镜和光学显微镜观察复合结构的形貌，根据复合结构的疏水性能和加工效率，筛选合适的微细铣刀直径。通过耐腐蚀性能测试对比未处理试样、仅经过皮秒激光加工后试样、仅经过微细铣削加工后试样及复合加工后试样在质量分数为5%的NaCl溶液中的耐腐蚀能力，采用矢量网络分析仪对比各结构的电磁波吸收能力。结果 当激光加工的栅格间距为20 μm，激光功率为3.5 W，激光扫描速度为1 000 mm/s，扫描次数为5时，所得到的表面微结构静态水接触角达到143°;在该表面上使用直径200 μm的微细铣刀得到的复合结构接触角达到137.5°，且加工效率较高。实验结果表明，仅经过皮秒激光加工和复合加工均能改善材料的耐腐蚀性能，使材料在NaCl(5%)溶液中浸泡5 d也无明显腐蚀痕迹，还能减少材料表面羰基铁的流失，延长材料的使用寿命。此外，复合结构对改善材料吸波性能的效果较好，可将吸波材料的最大反射损耗从–36.5 dB提升至–45.2 dB。结论 通过皮秒激光加工和微细铣削组合加工在羰基铁–环氧树脂基吸波材料表面制备的复合疏水结构可以改善其在海洋环境中的耐腐蚀性，并提升其电磁波吸收能力。 |
| 英文摘要: |
| In order to improve the corrosion resistance and electromagnetic wave absorption properties of carbonyl iron- epoxy resin based electromagnetic wave absorbing material without changing the material in Marine environment, a method of preparing composite hydrophobic microstructures on the surface of carbonyl iron-epoxy resin composite material by picosecond laser processing and micro milling was proposed in this paper. The effects of picosecond laser processing power, scanning speed and scanning times on the contact angle of the fabricated structures were investigated by single factor experiments when the grid spacing was 30 μm and 20 μm respectively. The structure morphology after laser processing was analyzed by scanning electron microscope, and the contact angle of the surface prepared under various laser processing parameters was measured to select the laser processing parameters with better hydrophobic performance and high processing efficiency. The experimental results showed that when the grid spacing was 20 μm, the laser pulse frequency was 300 kHz, the spot diameter was 20 μm, the pulse width was 10 ps, the wavelength was 532 nm, the laser power was 3.5 W, and the laser scanning speed was 1 000 mm/s, besides, when the number of laser scanning was 10, the static water contact angle of the surface can reach 143°, which were the picosecond laser processing parameters finally selected. The micro milling cutters with different diameters were used to conduct the micro milling for the surface machined with the selected laser parameters to obtain the composite hydrophobic structure, which was observed by confocal microscopy and optical microscopy. According to the hydrophobic performance and machining efficiency of the composite structure, a micro milling cutter with a diameter of 0.2 mm was selected, and the contact angle of the composite structure can reach 137.5° with higher processing efficiency. The corrosion resistance of unprocessed samples, picosecond laser processed samples, micro milling processed samples and composite processed samples in 5wt.% NaCl solution was compared by corrosion resistance test. The test results showed that both combined processing and picosecond laser processing can improve the corrosion resistance of the material, and the material has no obvious corrosion traces even after soaking in 5wt.% NaCl solution for five days. In addition, EDS analysis showed that the composite structure can reduce the loss of carbonyl iron on the surface and prolong the service life of the absorbing material. The electromagnetic wave absorption capacity of each structure was measured by vector network analyzer. According to the absorbing performance test, the composite structure can better improve the absorbing performance of the material, and the maximum reflection loss of the absorbing material can be increased from–36.5 dB to –45.2 dB. The composite hydrophobic structure prepared by picosecond laser and micro-milling on the surface of carbonyl iron-epoxy resin based electromagnetic wave absorbing material can improve its corrosion resistance and electromagnetic wave absorption capacity in Marine environment. This paper is of great significance to the improvement of anti-corrosion and absorbing properties of absorbing materials used in the ocean, and also provides a new research direction for the application and function of hydrophobic structures. |
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