Capillary forming method for preparing super oleophobic surface
A superoleophobic and forming technology, applied in the preparation of superoleophobic surface, the preparation of polymer superoleophobic surface, and the field of capillary forming method, can solve the problem of limited depth of secondary groove structure, complex and controllable preparation process problems such as poor performance, to achieve the effects of easy batch preparation, low preparation cost and simple equipment
Inactive Publication Date: 2015-07-08
JIANGSU UNIV
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However, due to the small diameter of the filaments in this method, the constructed secondary groove structure has limited depth
This limited-depth secondary groove structure affects both the superoleophobic properties of the surface and its stability.
At the same time, it is difficult to achieve the controllable preparation of the secondary groove structure by this method because the rule of filament arrangement is difficult to control.
[0005] In conclusion, in the current methods of preparing superoleophobic surfaces, the Bosch process requires expensive equipment and the preparation process is complicated, while in the electrospinning method, the controllability of the preparation of the secondary groove structure is poor, which greatly affects the surface Superoleophobic properties and their stability
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[0033] The micro-nano structure template is prepared by using a silicon substrate template through a photolithographic processing method, which is a mature micro-nano processing technology, and will not be described in detail here. The micro-nano structure of the prepared template is as follows: the structural form is a cylinder array, the diameter of the micro cylinder is 30 μm, the height is 50 μm, and the distance between the columns is 100 μm.
[0034] Both the liquid polymer and the smooth and flat substrate are made of PDMS. First, the two formulations of PDMS are weighed at a ratio of 10:1. After the two formulations are fully mixed, ~50 μL is poured on a smooth silicon wafer surface to prepare a smooth and flat substrate. As the substrate, place the silicon wafer on a horizontal surface. After the free spreading of PDMS is completed, send the silicon wafer loaded with PDMS into a vacuum drying oven, and place it in an environment of 60°C for 2 hours. The PDMS replica w...
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The invention relates to the field of functional surface preparation technology, and particularly relates to a capillary forming method for a preparing super oleophobic surface. The capillary forming method is suitable for preparation of a polymer super oleophobic surface, particularly suitable for the preparation of the super oleophobic surface under a simple condition. A pre-prepared micro-nano structure surface is employed as a template by the method; the template is put on a smooth and flat substrate which is coated by a liquid state polymer film; the template is separated 5-50 [mu]m from the substrate after contact with the separate speed ranging from 0.1 [mu]m / s to 5 [mu]m / s; the liquid state polymer is aggregated in a gap between the micro-nano structure and the substrate under the action of a capillary force; and at the time, the liquid state polymer is cured, so that a preparation of a secondary groove structure. Equipment required by the method is simple, preparation of the super oleophobic surface can be realized under a simple condition, preparation cost is low, and batch preparation can be easily realized.
Description
technical field [0001] The invention relates to the technical field of functional surface preparation, in particular to a capillary forming method for preparing a super-oleophobic surface, which is suitable for the preparation of a polymer super-oleophobic surface, especially for the preparation of a super-oleophobic surface under simple conditions. Background technique [0002] A superoleophobic surface refers to a surface that enables droplets with low surface tension (such as oil droplets) to present a large contact angle (>130°) on its surface. Since the oil droplets can have a larger contact angle, the surface extends the performance of the superhydrophobic surface to the oil environment, and can achieve more excellent self-cleaning and drag reduction performance. Therefore, superoleophobic surfaces have received extensive attention in recent years. [0003] In order to achieve the super-oleophobic performance of the surface, it is mainly achieved by constructing a ...
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IPC IPC(8): B81C1/00
Inventor 李健
Owner JIANGSU UNIV