CN110625208A - Wavy structure superhydrophobic surface for anti-icing and preparation method thereof - Google Patents
Wavy structure superhydrophobic surface for anti-icing and preparation method thereof Download PDFInfo
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- 230000003075 superhydrophobic effect Effects 0.000 title claims abstract description 42
- 238000002360 preparation method Methods 0.000 title abstract description 6
- 230000002209 hydrophobic effect Effects 0.000 claims abstract description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000000463 material Substances 0.000 claims abstract description 24
- 238000005516 engineering process Methods 0.000 claims abstract description 12
- 239000000126 substance Substances 0.000 claims abstract description 12
- 238000005520 cutting process Methods 0.000 claims abstract description 11
- 239000000758 substrate Substances 0.000 claims abstract description 11
- 238000012545 processing Methods 0.000 claims abstract description 7
- 238000001039 wet etching Methods 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 15
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 14
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 12
- 238000012986 modification Methods 0.000 claims description 11
- 230000004048 modification Effects 0.000 claims description 11
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 8
- 239000008367 deionised water Substances 0.000 claims description 8
- 229910021641 deionized water Inorganic materials 0.000 claims description 8
- XPBBUZJBQWWFFJ-UHFFFAOYSA-N fluorosilane Chemical compound [SiH3]F XPBBUZJBQWWFFJ-UHFFFAOYSA-N 0.000 claims description 8
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 claims description 4
- 238000010301 surface-oxidation reaction Methods 0.000 claims description 4
- 238000002791 soaking Methods 0.000 claims description 3
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- 239000007788 liquid Substances 0.000 abstract description 5
- 239000002184 metal Substances 0.000 abstract description 4
- 229910052751 metal Inorganic materials 0.000 abstract description 4
- 238000009833 condensation Methods 0.000 abstract description 2
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- 238000004381 surface treatment Methods 0.000 abstract description 2
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- 239000000243 solution Substances 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H7/00—Processes or apparatus applicable to both electrical discharge machining and electrochemical machining
- B23H7/02—Wire-cutting
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
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- C23F1/00—Etching metallic material by chemical means
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- C23F1/32—Alkaline compositions
- C23F1/34—Alkaline compositions for etching copper or alloys thereof
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- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/10—Other heavy metals
- C23G1/103—Other heavy metals copper or alloys of copper
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Abstract
一种用于抗结冰的波浪结构超疏水表面及其制备方法，属于金属基材表面处理技术领域。包括：选取基材，采用线切割精加工技术在基材上加工波浪结构；对制得的波浪结构预处理，利用湿法刻蚀在波浪结构表面制备疏水微米花结构；将疏水微米花结构进行低表面能物质修饰，制得具有波浪结构的超疏水表面。此波浪结构超疏水表面为非对称表面，液滴撞击在波浪结构上产生非对称弹跳，与液滴撞击在等效的超疏水平面产生的对称性弹跳相比，非对称弹跳的固液接触时间缩短40％。本发明的波浪结构超疏水表面改善金属基材与水滴的接触特性，经低表面能物质修饰的微米花结构还可降低水滴滑过表面的粘滞力，降低水珠在基材表面的凝结程度，达到高效、清洁、低成本的抗结冰目的。
The invention discloses a wave-structured superhydrophobic surface for anti-icing and a preparation method thereof, belonging to the technical field of surface treatment of metal substrates. Including: selecting the base material, processing the wave structure on the base material by wire cutting finishing technology; pre-treating the prepared wave structure, using wet etching to prepare the hydrophobic micron flower structure on the surface of the wave structure; making the hydrophobic micron flower structure Modified with low surface energy substances to produce a super-hydrophobic surface with a wavy structure. The wave structure superhydrophobic surface is an asymmetric surface, and the droplet impacts on the wave structure to produce asymmetric bounce. Compared with the symmetrical bounce generated by the droplet impact on the equivalent superhydrophobic surface, the solid-liquid contact time of the asymmetric bounce 40% shorter. The superhydrophobic surface of the wave structure of the present invention improves the contact characteristics between the metal substrate and water droplets, and the micron flower structure modified by low surface energy substances can also reduce the viscosity of water droplets sliding over the surface, and reduce the degree of condensation of water droplets on the surface of the substrate , to achieve the purpose of anti-icing with high efficiency, cleanliness and low cost.
Description
技术领域technical field
本发明属于金属基材表面处理技术领域，涉及一种用于抗结冰的波浪结构超疏水表面及其制备方法。The invention belongs to the technical field of surface treatment of metal substrates, and relates to a wave-structure super-hydrophobic surface for anti-icing and a preparation method thereof.
背景技术Background technique
在低温环境下，输电通信线路、航空、航海或高铁运输等设备表面常常由于水汽凝结或过冷水滴撞击并积聚而发生结冰现象，这会给设备使用及人身安全带来极大危害。如，对于长距离输电的高压电线，覆冰使支撑高压线的铁塔加大了负重。严重的覆冰使铁塔无力支持这些电线而倒塌。而铁塔上的绝缘子串上有了覆冰就只能拉闸使输电线停止输电，于是造成大面积的电力中断；飞机、舰船上的测速、测压传感器探头结冰会导致仪表指示失真，机体、船体结冰将增加自身重量，增大航行阻力。因次，长期以来输电通信线路、航空、航海或高铁运输等设备表面的抗结冰问题受到高度重视。In a low temperature environment, the surface of power transmission and communication lines, aviation, navigation or high-speed rail transportation equipment often freezes due to condensation of water vapor or the impact and accumulation of supercooled water droplets, which will bring great harm to the use of equipment and personal safety. For example, for high-voltage wires for long-distance power transmission, icing increases the load on the iron towers supporting the high-voltage wires. Severe icing made the tower unable to support the wires and collapsed. However, if the insulator strings on the iron tower are covered with ice, they can only switch on the power transmission line to stop the power transmission, thus causing a large-scale power interruption; the probes of the speed measuring and pressure measuring sensors on the aircraft and ships will be frozen, which will cause the instrument indication to be distorted. The icing of the body and the hull will increase its own weight and increase the navigation resistance. Therefore, for a long time, the problem of anti-icing on the surface of equipment such as power transmission and communication lines, aviation, navigation or high-speed rail transportation has been highly valued.
工程上主要利用机械或加热技术来除冰、融冰，但这些方法往往伴随着复杂的结构设计和大量额外的能量消耗。近年来，超疏水技术受到广泛关注，在自清洁表面、微流体控制、油水分离等领域展现出了良好的应用前景。大量研究也表明，超疏水表面具有优异的抗结冰性能，即延迟、降低甚至完全阻止冰霜在固体表面的堆积。通过在材料表面构建疏水功能涂层，或者对原本的材料表面进行疏水处理使其具有抗结冰的性能，这些主动抗结冰技术受到了越来越多的关注。Engineering mainly uses mechanical or heating technology to de-ice and melt ice, but these methods are often accompanied by complex structural design and a lot of extra energy consumption. In recent years, superhydrophobic technology has received extensive attention, and has shown good application prospects in the fields of self-cleaning surfaces, microfluidic control, and oil-water separation. A large number of studies have also shown that superhydrophobic surfaces have excellent anti-icing properties, that is, delay, reduce or even completely prevent the accumulation of frost on solid surfaces. These active anti-icing technologies have received more and more attention by constructing hydrophobic functional coatings on the surface of materials, or by hydrophobically treating the original material surface to make it anti-icing.
目前，用于抗结冰的超疏水表面大多是基于平面进行疏水处理或是构建疏水功能涂层，而在同种疏水处理条件下，拥有波浪结构的超疏水表面比超疏水平面具有更好的抗结冰性能，而且波浪结构可以减少和避免水滴在表面的附着累积，或是在水滴未结冰之前更容易从表面借助于重力、风力或者其他外力的作用滑落，从而进一步减少了冰在其表面形成的机会。At present, most of the superhydrophobic surfaces used for anti-icing are based on the hydrophobic treatment of planes or the construction of hydrophobic functional coatings. Under the same hydrophobic treatment conditions, superhydrophobic surfaces with wavy structures have better performance than superhydrophobic surfaces. Anti-icing performance, and the wave structure can reduce and avoid the adhesion and accumulation of water droplets on the surface, or it is easier to slide off the surface by gravity, wind or other external forces before the water droplets freeze, thereby further reducing the ice on its surface. Opportunities for surface formation.
发明内容Contents of the invention
本发明针对现有超疏水表面大多基于平面进行疏水处理的局限性，提供一种用于抗结冰的波浪结构超疏水表面的制备方法。此波浪结构超疏水表面为非对称表面，液滴撞击在波浪结构上会产生非对称弹跳，沿两个垂直方向有明显的扩张和收缩，与液滴撞击在等效的超疏水平面产生的对称性弹跳相比，这种非对称弹跳的固液接触时间缩短了40％。因此，具备波浪结构的超疏水表面拥有超疏水特性的同时还可减少固液接触时间，减少热交换进而实现高效、清洁、低成本的抗结冰。The present invention aims at the limitation that most existing super-hydrophobic surfaces are subjected to hydrophobic treatment based on planes, and provides a method for preparing a wave-structured super-hydrophobic surface for anti-icing. The superhydrophobic surface of the wave structure is an asymmetric surface. When the droplet hits the wave structure, it will bounce asymmetrically, and there will be obvious expansion and contraction along two vertical directions, which is symmetrical with the impact of the droplet on the equivalent superhydrophobic horizontal plane. The solid-liquid contact time of this asymmetric bounce is shortened by 40% compared with the normal bounce. Therefore, the superhydrophobic surface with a wavy structure has superhydrophobic properties and can also reduce solid-liquid contact time and heat exchange to achieve efficient, clean, and low-cost anti-icing.
本发明是通过以下技术方案实现的：The present invention is achieved through the following technical solutions:
一种用于抗结冰的波浪结构超疏水表面，包括波浪结构基底、疏水微米花结构和低表面能物质修饰层，其中，疏水微米花结构均匀分布于波浪结构基底上表面，低表面能物质修饰层附着于疏水微米花结构上表面。A wavy structure superhydrophobic surface for anti-icing, including a wavy structure substrate, a hydrophobic microflower structure and a low surface energy material modification layer, wherein the hydrophobic microflower structure is evenly distributed on the upper surface of the wave structure substrate, and the low surface energy substance The modification layer is attached to the upper surface of the hydrophobic microflower structure.
所述的波浪结构为凹凸相间的半圆柱体结构，直径为4～20mm。所述的疏水微米花为球形结构，均匀分布于波浪结构上表面，其直径尺寸为5～20μm。所述的低表面能物质修饰层物质成分为三氯-(1H,1H,2H,2H)-全氟辛基硅烷。The wave structure is a semi-cylindrical structure with alternating concavities and convexities, with a diameter of 4-20 mm. The hydrophobic microflowers have a spherical structure, are uniformly distributed on the upper surface of the wave structure, and have a diameter of 5-20 μm. The material composition of the low surface energy material modification layer is trichloro-(1H,1H,2H,2H)-perfluorooctylsilane.
一种用于抗结冰的波浪结构超疏水表面的制备方法，包括以下步骤：A preparation method for an anti-icing wavy structure super-hydrophobic surface, comprising the following steps:
第一步，选取工业用纯铜为基材，采用线切割精加工技术在基材上加工波浪结构；The first step is to select industrial pure copper as the base material, and use the wire cutting finishing technology to process the wave structure on the base material;
所述的选取基材纯度大于99％。所述的线切割精加工技术是指在基材上利用线切割精加工方法加工出波浪结构，尺寸加工精度小于0.015mm。The purity of the selected base material is greater than 99%. The wire-cut finishing technology refers to processing the wave structure on the base material by using the wire-cut finishing method, and the dimensional processing accuracy is less than 0.015mm.
第二步，对制得的波浪结构进行预处理，利用湿法刻蚀在波浪结构表面制备疏水微米花结构；In the second step, the prepared wave structure is pretreated, and a hydrophobic micro flower structure is prepared on the surface of the wave structure by wet etching;
所述的对制得的波浪结构预处理包括如下操作：先用1mol/L的稀盐酸溶液腐蚀清洗，除去表面氧化/氢氧化膜，而后依次用丙酮、无水乙醇和去离子水超声清洗8～12min，之后用氮气吹干。The pretreatment of the prepared wave structure includes the following operations: first corrode cleaning with 1mol/L dilute hydrochloric acid solution to remove the surface oxidation/hydroxide film, and then ultrasonically clean it with acetone, absolute ethanol and deionized water for 8 ~12min, then dry with nitrogen.
所述的利用湿法刻蚀在波浪结构表面制备疏水微米花结构包括如下操作：配制2.5mol/L的NaOH和0.1mol/L的(NH4)2S2O8混合溶液，将预处理过的波浪结构在室温下浸泡反应60～90min后，取出用去离子水清洗，用氮气吹干。The preparation of the hydrophobic micron flower structure on the surface of the wave structure by wet etching includes the following operations: preparing a mixed solution of 2.5 mol/L NaOH and 0.1 mol/L (NH 4 ) 2 S 2 O 8 , pretreated After soaking and reacting for 60-90 minutes at room temperature, take out the wavy structure, wash it with deionized water, and dry it with nitrogen.
第三步，将疏水微米花结构用低表面能物质修饰，制得具有波浪结构的超疏水表面。In the third step, the hydrophobic microflower structure is modified with low surface energy substances to obtain a superhydrophobic surface with a wavy structure.
所述的疏水微米花结构进行低表面能物质修饰是指用1mmol/L氟硅烷的醇溶液浸泡疏水微米花结构表面40～60min，最后经80～150℃加热烘干1h以上。The modification of the hydrophobic microflower structure with low surface energy substances refers to immersing the surface of the hydrophobic microflower structure with 1 mmol/L fluorosilane alcohol solution for 40-60 minutes, and finally heating and drying at 80-150° C. for more than 1 hour.
所述的氟硅烷为三氯-(1H,1H,2H,2H)-全氟辛基硅烷。The fluorosilane is trichloro-(1H,1H,2H,2H)-perfluorooctylsilane.
本发明的有益效果在于：The beneficial effects of the present invention are:
(1)此波浪结构超疏水表面为非对称表面，当液滴撞击在波浪结构上时会产生非对称弹跳，与液滴撞击在等效的超疏水平面产生的对称性弹跳相比，这种非对称弹跳的固液接触时间缩短了40％。(1) The superhydrophobic surface of the wave structure is an asymmetric surface. When the droplet hits the wave structure, it will produce an asymmetric bounce. Compared with the symmetrical bounce generated by the droplet hitting the equivalent superhydrophobic surface, this The solid-liquid contact time for asymmetric bounces has been reduced by 40%.
(2)本发明以线切割精加工技术和表面修饰技术为基础，采用室温下在工业纯铜基材上构建具有波浪结构超疏水表面的方法实现。制备方法简单、易于操作、效率高、成本低，同时对金属基材的形状、材质无特殊要求。(2) The present invention is based on wire-cut finishing technology and surface modification technology, and is realized by constructing a super-hydrophobic surface with a wave structure on an industrial pure copper substrate at room temperature. The preparation method is simple, easy to operate, high in efficiency and low in cost, and has no special requirements on the shape and material of the metal substrate.
(3)与现有超疏水平面相比，具备波浪结构超疏水表面改善了水滴与表面的接触特性，拥有超疏水特性的同时还可减少固液接触时间，减少热交换，波浪结构还可进一步减少和避免水滴在表面的附着累积，在水滴未结冰之前更容易从表面借助于重力、风力或者其他外力的作用滑落，因此具备波浪结构超疏水表面具有更优异的抗结冰性能。(3) Compared with the existing super-hydrophobic surface, the super-hydrophobic surface with wave structure improves the contact characteristics between water droplets and the surface. With super-hydrophobic properties, it can also reduce the solid-liquid contact time and heat exchange. The wave structure can be further improved. Reduce and avoid the attachment and accumulation of water droplets on the surface, and it is easier to slide off the surface with the help of gravity, wind or other external forces before the water droplets freeze, so the super-hydrophobic surface with wave structure has better anti-icing performance.
附图说明Description of drawings
图1为本发明实施例1制备的具有波浪结构超疏水表面结构示意图及SEM图。Fig. 1 is a schematic diagram and an SEM image of a superhydrophobic surface with a wavy structure prepared in Example 1 of the present invention.
具体实施形式Specific implementation form
下面结合实施例和附图对本发明的技术方案做进一步详细说明。The technical solution of the present invention will be described in further detail below in conjunction with the embodiments and the accompanying drawings.
实施例1Example 1
本实施例的一种用于抗结冰的波浪结构超疏水表面的制备方法，包括以下具体步骤：A method for preparing an anti-icing wave-structured superhydrophobic surface of the present embodiment comprises the following specific steps:
第一步、选取基材，采用线切割精加工技术在基材上加工波浪结构；The first step is to select the base material, and process the wave structure on the base material by wire-cut finishing technology;
在本实例中，选取的基材为工业用纯铜，纯度大于99％。线切割精加工所使用的线切割机采用DK7732E数控快走丝线切割机，尺寸加工精度小于0.015mm。加工的波浪结构为凹凸相间的半圆柱体结构，直径为8mm，结构如图1所示。In this example, the selected base material is industrial pure copper with a purity greater than 99%. The wire cutting machine used for wire cutting finishing is DK7732E CNC fast-feeding wire cutting machine, and the dimensional processing accuracy is less than 0.015mm. The processed wave structure is a concave-convex semi-cylindrical structure with a diameter of 8 mm. The structure is shown in Figure 1.
第二步、对第一步制得的波浪结构预处理，利用湿法刻蚀在波浪结构表面制备疏水微米花结构；The second step is to pretreat the wave structure obtained in the first step, and prepare a hydrophobic micron flower structure on the surface of the wave structure by wet etching;
先用1mol/L的稀盐酸溶液腐蚀清洗，除去表面氧化/氢氧化膜，而后依次用丙酮、无水乙醇和去离子水超声清洗8min，之后用氮气吹干。再配制2.5mol/L的NaOH和0.1mol/L的(NH4)2S2O8混合溶液，将预处理过的波浪结构在室温下浸泡反应60min后，取出用去离子水清洗，用氮气吹干。制得的疏水微米花结构均匀分布于波浪结构上表面，单体结构为球形结构，其平均直径尺寸为5μm，SEM图如图1所示。First use 1mol/L dilute hydrochloric acid solution to etch and clean to remove the surface oxidation/hydroxide film, then use acetone, absolute ethanol and deionized water to ultrasonically clean for 8 minutes, and then blow dry with nitrogen. Then prepare a mixed solution of 2.5mol/L NaOH and 0.1mol/L (NH 4 ) 2 S 2 O 8 , soak and react the pretreated wave structure at room temperature for 60 minutes, take it out and wash it with deionized water, and use nitrogen gas to clean it. blow dry. The prepared hydrophobic microflower structure is evenly distributed on the upper surface of the wavy structure, and the monomer structure is a spherical structure with an average diameter of 5 μm. The SEM image is shown in FIG. 1 .
第三步、将疏水微米花结构用低表面能物质修饰，制得具有波浪结构的超疏水表面。In the third step, the hydrophobic microflower structure is modified with a low surface energy substance to obtain a superhydrophobic surface with a wavy structure.
用1mmol/L氟硅烷的醇溶液浸泡疏水微米花结构表面60min，最后经150℃加热烘干1h。其中所用的氟硅烷为三氯-(1H,1H,2H,2H)-全氟辛基硅烷，低表面能物质修饰层附着于疏水微米花结构上表面，其物质成分为三氯-(1H,1H,2H,2H)-全氟辛基硅烷。接触角为163.4°±2.6°。Soak the surface of the hydrophobic microflower structure with 1mmol/L fluorosilane alcohol solution for 60min, and finally heat and dry at 150°C for 1h. The fluorosilane used is trichloro-(1H,1H,2H,2H)-perfluorooctylsilane, and the low surface energy material modification layer is attached to the upper surface of the hydrophobic microflower structure, and its material composition is trichloro-(1H, 1H,2H,2H)-Perfluorooctylsilane. The contact angle is 163.4°±2.6°.
实施例2Example 2
本实施例的一种用于抗结冰的波浪结构超疏水表面的制备方法，包括以下具体步骤：A method for preparing an anti-icing wave-structured superhydrophobic surface of the present embodiment comprises the following specific steps:
第一步、选取基材，采用线切割精加工技术在基材上加工波浪结构；The first step is to select the base material, and process the wave structure on the base material by wire cutting finishing technology;
在本实例中，选取的基材为工业用纯铜，纯度大于99％。线切割精加工所使用的线切割机采用DK7732E数控快走丝线切割机，尺寸加工精度小于0.015mm。加工的波浪结构为凹凸相间的半圆柱体结构，直径为15mm。In this example, the selected base material is industrial pure copper with a purity greater than 99%. The wire cutting machine used for wire cutting finishing is DK7732E CNC fast-feeding wire cutting machine, and the dimensional processing accuracy is less than 0.015mm. The processed wave structure is a concave-convex semi-cylindrical structure with a diameter of 15 mm.
第二步、对第一步制得的波浪结构预处理，利用湿法刻蚀在波浪结构表面制备疏水微米花结构；The second step is to pretreat the wave structure obtained in the first step, and prepare a hydrophobic micron flower structure on the surface of the wave structure by wet etching;
先用1mol/L的稀盐酸溶液腐蚀清洗，除去表面氧化/氢氧化膜，而后依次用丙酮、无水乙醇和去离子水超声清洗10min，之后用氮气吹干。再配制2.5mol/L的NaOH和0.1mol/L的(NH4)2S2O8混合溶液，将预处理过的波浪结构在室温下浸泡反应90min后，取出用去离子水清洗，用氮气吹干。制得的疏水微米花结构均匀分布于波浪结构上表面，单体结构为球形结构，其平均直径尺寸为13μm。First use 1mol/L dilute hydrochloric acid solution to etch and clean to remove the surface oxidation/hydroxide film, then use acetone, absolute ethanol and deionized water to ultrasonically clean for 10 minutes, and then blow dry with nitrogen. Then prepare a mixed solution of 2.5mol/L NaOH and 0.1mol/L (NH 4 ) 2 S 2 O 8 , soak and react the pretreated wave structure at room temperature for 90 minutes, take it out and wash it with deionized water, and use nitrogen gas to clean it. blow dry. The prepared hydrophobic microflower structure is evenly distributed on the upper surface of the wavy structure, and the monomer structure is a spherical structure with an average diameter of 13 μm.
第三步、将疏水微米花结构用低表面能物质修饰，制得具有波浪结构的超疏水表面。In the third step, the hydrophobic microflower structure is modified with a low surface energy substance to obtain a superhydrophobic surface with a wavy structure.
用1mmol/L氟硅烷的醇溶液浸泡疏水微米花结构表面50min，最后经80℃加热烘干5h。其中所用的氟硅烷为三氯-(1H,1H,2H,2H)-全氟辛基硅烷，低表面能物质修饰层附着于疏水微米花结构上表面，其物质成分为三氯-(1H,1H,2H,2H)-全氟辛基硅烷。接触角为162.8°±2.3°。Soak the surface of the hydrophobic microflower structure with 1mmol/L fluorosilane alcohol solution for 50min, and finally heat and dry at 80°C for 5h. The fluorosilane used is trichloro-(1H,1H,2H,2H)-perfluorooctylsilane, and the low surface energy material modification layer is attached to the upper surface of the hydrophobic microflower structure, and its material composition is trichloro-(1H, 1H,2H,2H)-Perfluorooctylsilane. The contact angle was 162.8°±2.3°.
以上所述实施例仅表达本发明的实施方式，但并不能因此而理解为对本发明专利的范围的限制，应当指出，对于本领域的技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变形和改进，这些均属于本发明的保护范围。The above-mentioned embodiment only expresses the implementation mode of the present invention, but can not therefore be interpreted as the limitation of the scope of the patent of the present invention, it should be pointed out that, for those skilled in the art, under the premise of not departing from the concept of the present invention, Several modifications and improvements can also be made, all of which belong to the protection scope of the present invention.
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