Mr. Yu Huang Profile

Yu Huang

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Proceedings Article | 15 December 2022 Paper

Laser composite fabrication of super-wetting membrane with micro square hole-nanowire structure for oil-water separation

Guoqiang Xin, Yu Huang, Youmin Rong

Proceedings Volume 12478, 124782S (2022) https://doi.org/10.1117/12.2654780

KEYWORDS: Copper, Nanowires, Laser drilling, Oxygen, Particles, Composites, Pollution, Oxides, Scanning electron microscopy, Picosecond phenomena

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Oil pollution damages the water, air, and soil, thus posing a threat to human health and biodiversity. The scientific and effective solution to oil pollution and the separation of oil and water has become an urgent problem to be solved. In this paper, a super-wetting oil-water separation membrane with micro square hole-nanowire composite structure and its laser composite preparation method are proposed. The influence of the scanning times of the picosecond UV laser on the evolution of pore formation was studied. The morphologies of laser-fabricated array holes without cleaning, alcohol cleaning and hydrochloric acid cleaning were analyzed. It was found that the covered particles could only be removed by cleaning with hydrochloric acid. The changes in the oxygen content of the inner wall and edge of the hole were analyzed by EDS, and it was found that the oxygen content could be greatly reduced only after cleaning with hydrochloric acid. The characterization of dynamic wettability indicated that the prepared membranes had excellent superhydrophilicity. The oilwater separation test verifies that oil and water can be effectively separated, which has a certain enlightening effect on the preparation of oil-water separation membrane by laser.

Proceedings Article | 2 December 2020 Paper

High corrosion resistance micro-structure of Al alloy fabricated by laser

Guoqiang Xin, Yu Huang, Youmin Rong

Proceedings Volume 11717, 117171W (2020) https://doi.org/10.1117/12.2587137

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As a kind of metal material with low density and high strength, Al alloy plays an important role in transportation, electric power and energy fields. Enhancing its corrosion resistance is of great significance to improving the application value. In this paper, the groove array micro-structure was fabricated on the surface of 5083 Al alloy by laser, and the surface free energy was further reduced to obtain a superhydrophobic Al alloy surface. The controllable laser fabrication process of the micro-structure and the corrosion resistance of the superhydrophobic surface were studied. Under the combined impact of laser ablation and in situ deposition, the groove depth first increases and then decreases, and the uniformity gets worse, as the number of scanning increases. The groove structure and hump structure can be obtained successively with the gradual increase of scanning interval. EDS results show that the materials sputtering to both sides of the groove had a most intense oxidation, and the ratio of oxygen element increased by 11.2%. The largest contact angle of the fabricated superhydrophobic surface can be 162°, which shows little adhesion. The electrochemical corrosion test results show that the current density has dropped by two orders of magnitude, and the corrosion inhibition rate is 98.9%, showing good corrosion resistance.

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