CN117798504B - Preparation method of reentrant corner structure with adjustable local wettability - Google Patents

Preparation method of reentrant corner structure with adjustable local wettability Download PDF

Info

Publication number
CN117798504B
CN117798504B CN202311854574.0A CN202311854574A CN117798504B CN 117798504 B CN117798504 B CN 117798504B CN 202311854574 A CN202311854574 A CN 202311854574A CN 117798504 B CN117798504 B CN 117798504B
Authority
CN
China
Prior art keywords
concave angle
angle structure
wettability
adjustable
laser
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202311854574.0A
Other languages
Chinese (zh)
Other versions
CN117798504A (en
Inventor
杨益
王霄鹏
张淼淇
李国强
宋岳干
王远
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Southwest University of Science and Technology
Original Assignee
Southwest University of Science and Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Southwest University of Science and Technology filed Critical Southwest University of Science and Technology
Priority to CN202311854574.0A priority Critical patent/CN117798504B/en
Publication of CN117798504A publication Critical patent/CN117798504A/en
Application granted granted Critical
Publication of CN117798504B publication Critical patent/CN117798504B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00Working by laser beam, e.g. welding, cutting or boring
    • B23K26/352Working by laser beam, e.g. welding, cutting or boring for surface treatment
    • B23K26/355Texturing
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00Working by laser beam, e.g. welding, cutting or boring
    • B23K26/60Preliminary treatment
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00Working by laser beam, e.g. welding, cutting or boring
    • B23K26/70Auxiliary operations or equipment

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)

Abstract

本发明公开了一种局部润湿性可调控的凹角结构的制备方法,包括:利用激光在基体材料的表面诱导微柱自生长得到微柱结构阵列;在微柱结构顶部覆盖材质不同于基体材料的异质材料胶带,利用飞秒激光在异质材料胶带表面原位制备出凹角顶部结构,得到蘑菇头微柱结构;在基体材料整体包括蘑菇头微柱结构表面喷涂超疏水涂层;利用飞秒激光原位扫除异质材料胶带表面中心局部区域的超疏水涂层,加工出亲水顶点,制备出局部润湿性可调控的凹角结构。本发明制备得到的凹角结构具有优异的水下气膜保持性和恢复性,具有良好的水下减阻能力。

The invention discloses a method for preparing a concave angle structure with adjustable local wettability, comprising: using a laser to induce microcolumn self-growth on the surface of a base material to obtain a microcolumn structure array; covering the top of the microcolumn structure with a heterogeneous material tape whose material is different from the base material, using a femtosecond laser to in-situ prepare a concave angle top structure on the surface of the heterogeneous material tape to obtain a mushroom head microcolumn structure; spraying a super-hydrophobic coating on the entire base material including the surface of the mushroom head microcolumn structure; using a femtosecond laser to in-situ sweep the super-hydrophobic coating in the central local area of the surface of the heterogeneous material tape, processing a hydrophilic vertex, and preparing a concave angle structure with adjustable local wettability. The concave angle structure prepared by the invention has excellent underwater air film retention and recovery, and has good underwater drag reduction capability.

Description

一种局部润湿性可调控的凹角结构的制备方法A method for preparing a concave angle structure with adjustable local wettability

技术领域Technical Field

本发明属于超疏水功能材料技术领域,更具体地说,本发明涉及一种局部润湿性可调控的凹角结构的制备方法。The present invention belongs to the technical field of super-hydrophobic functional materials, and more specifically, relates to a method for preparing a concave angle structure with adjustable local wettability.

背景技术Background technique

船舶航行途中受到的摩擦阻力约占全部阻力的50%,而对水下运动的鱼雷、潜艇等,这个比例可高达70%。这不仅降低了船舶航行的速度,还增加了能量的消耗,加剧了温室气体的排放。降低运动过程产生的摩擦阻力,对提高船舶运输的效率,节约能源,减少温室气体排放,降低污染等具有显著的作用。因此研究减阻增效技术已成为船舶行业普遍关注的问题。The frictional resistance encountered by ships during navigation accounts for about 50% of the total resistance, and for underwater torpedoes, submarines, etc., this proportion can be as high as 70%. This not only reduces the speed of ships, but also increases energy consumption and aggravates greenhouse gas emissions. Reducing the frictional resistance generated during the movement process has a significant effect on improving the efficiency of ship transportation, saving energy, reducing greenhouse gas emissions, and reducing pollution. Therefore, the research on drag reduction and efficiency improvement technology has become a common concern in the shipping industry.

其中,超疏水表面(SHSs)在水下可以束缚气膜层,把部分固液接触界面转变为气液接触界面,并在气液界面上产生速度滑移以减小流动阻力,是一种新型高效减阻方法;通过在船舶和航行器外表面构建具有特定疏水微结构层,来实现水下减阻,具有简便、经济及海洋防污功能的优点,在海洋工程等相关领域潜在应用广泛。然而大多数超疏水材料在在水下受到水流扰动后,容易造成其表面封存气膜的塌陷或消失,从而影响或丧失水下减阻性能。为了解决这些问题,需要设计一种新的结构,可以在水下保持长久稳定的气膜并具有高效的减阻性能。Among them, super-hydrophobic surfaces (SHSs) can bind air film layers underwater, transform part of the solid-liquid contact interface into a gas-liquid contact interface, and generate velocity slip on the gas-liquid interface to reduce flow resistance. It is a new and efficient drag reduction method; underwater drag reduction is achieved by constructing a specific hydrophobic microstructure layer on the outer surface of ships and aircraft. It has the advantages of simplicity, economy and marine anti-fouling function, and has potential applications in related fields such as marine engineering. However, most super-hydrophobic materials are prone to collapse or disappearance of the air film sealed on their surface after being disturbed by water flow underwater, thereby affecting or losing underwater drag reduction performance. In order to solve these problems, it is necessary to design a new structure that can maintain a long-term stable air film underwater and have efficient drag reduction performance.

发明内容Summary of the invention

本发明的一个目的是解决至少上述问题和/或缺陷,并提供至少后面将说明的优点。An object of the present invention is to solve at least the above-mentioned problems and/or disadvantages and to provide at least the advantages which will be described hereinafter.

为了实现根据本发明的这些目的和其它优点,提供了一种局部润湿性可调控的凹角结构的制备方法,包括以下步骤:In order to achieve these purposes and other advantages according to the present invention, a method for preparing a concave angle structure with adjustable local wettability is provided, comprising the following steps:

步骤一:利用激光在基体材料的表面诱导微柱自生长得到微柱结构阵列;Step 1: Using laser to induce micro-pillar self-growth on the surface of the substrate material to obtain a micro-pillar structure array;

步骤二:在微柱结构顶部覆盖材质不同于基体材料的异质材料胶带,利用飞秒激光在异质材料胶带表面原位制备出凹角顶部结构,得到蘑菇头微柱结构;Step 2: Cover the top of the micro-column structure with a heterogeneous material tape whose material is different from the base material, and use a femtosecond laser to in-situ prepare a concave corner top structure on the surface of the heterogeneous material tape to obtain a mushroom head micro-column structure;

步骤三:在基体材料整体包括蘑菇头微柱结构表面喷涂超疏水涂层;Step 3: spraying a super-hydrophobic coating on the entire substrate material including the surface of the mushroom head micro-column structure;

步骤四:利用飞秒激光原位扫除异质材料胶带表面中心局部区域的超疏水涂层,加工出亲水顶点,制备出局部润湿性可调控的凹角结构。Step 4: Use a femtosecond laser to in-situ remove the super-hydrophobic coating in the central local area of the surface of the heterogeneous material tape, process the hydrophilic vertex, and prepare a concave angle structure with adjustable local wettability.

优选的是,其中,所述基体材料为热缩性聚苯乙烯。Preferably, the base material is heat-shrinkable polystyrene.

优选的是,其中,所述步骤一中,使用飞秒激光在基体材料表面上连续绘制预编程的二维圆,通过烧蚀将二维圆内基体材料与x-y平面上的基体材料分离,随着激光扫描圆的次数增加,激光累积的热量导致底层基体材料收缩生长,形成微柱结构阵列。Preferably, in the step one, a femtosecond laser is used to continuously draw a pre-programmed two-dimensional circle on the surface of the base material, and the base material in the two-dimensional circle is separated from the base material on the x-y plane by ablation. As the number of times the laser scans the circle increases, the accumulated heat of the laser causes the underlying base material to shrink and grow, forming a microcolumn structure array.

优选的是,其中,所述步骤一中,激光的扫描功率为100~200mW,扫描速度为30~100mm/s,每个微柱结构的扫描次数为50~80次。Preferably, in the step 1, the scanning power of the laser is 100-200 mW, the scanning speed is 30-100 mm/s, and the number of scanning times for each microcolumn structure is 50-80 times.

优选的是,其中,所述步骤二中的异质材料胶带的材料包括铝箔、聚四氟乙烯、聚对苯二甲酸乙二醇酯、聚酰亚胺、聚二甲基硅氧烷中的一种。Preferably, the material of the heterogeneous material tape in step 2 includes one of aluminum foil, polytetrafluoroethylene, polyethylene terephthalate, polyimide, and polydimethylsiloxane.

优选的是,其中,所述步骤二中,在微柱结构阵列顶部覆盖的异质材料胶带上,利用飞秒激光原位连续绘制二维圆,直至切割出凹角顶部结构,并撕除多余异质材料。Preferably, in the step 2, a femtosecond laser is used to continuously draw two-dimensional circles in situ on the heterogeneous material tape covering the top of the micro-pillar structure array until the concave corner top structure is cut out, and the excess heterogeneous material is torn off.

优选的是,其中,凹角结构表面顶部异质材料胶带厚度为50μm。Preferably, the thickness of the heterogeneous material tape on the top of the concave angle structure surface is 50 μm.

优选的是,其中,所述步骤三中,超疏水涂层的材料包括Glaco溶液和疏水二氧化硅颗粒,超疏水涂层的喷涂方法为用喷枪将在距离基体材料10cm处喷涂。Preferably, in step three, the material of the super-hydrophobic coating comprises Glaco solution and hydrophobic silica particles, and the super-hydrophobic coating is sprayed with a spray gun at a distance of 10 cm from the base material.

一种局部润湿性可调控的凹角结构的应用,所述局部润湿性可调控的凹角结构应用于在船舶和航行器外表面构建实现水下减阻的疏水微结构层。The invention discloses an application of a concave angle structure with adjustable local wettability, wherein the concave angle structure with adjustable local wettability is applied to construct a hydrophobic microstructure layer on the outer surface of a ship or a spacecraft to achieve underwater drag reduction.

本发明至少包括以下有益效果:The present invention has at least the following beneficial effects:

其一,通过在聚苯乙烯(PS)表面上的激光原位诱导自生长来制造凹角结构,相较于传统微纳加工的凹角制备方法,具有制备工艺简单、制备时间短、参数可灵活控制和局部润湿性可调控等优点。First, the concave angle structure is manufactured by laser in situ induced self-growth on the polystyrene (PS) surface. Compared with the traditional micro-nano processing concave angle preparation method, it has the advantages of simple preparation process, short preparation time, flexible control of parameters and adjustable local wettability.

其二,制备的局部润湿性可调控的凹角结构顶部具备的亲水点可以在水下牢牢钉扎住气液界面,实现了更好的水下气膜保持性同时具备高效的减阻性能;Secondly, the hydrophilic points on the top of the prepared concave angle structure with adjustable local wettability can firmly pin the air-liquid interface underwater, achieving better underwater air film retention while having efficient drag reduction performance;

其三,通过利用聚苯乙烯(PS)衬底的柔韧性性,其良好的水下气膜保持与减阻性能可以很容易地转移到弯曲的表面上,具有出色的应用潜力。Third, by utilizing the flexibility of the polystyrene (PS) substrate, its good underwater air film retention and drag reduction performance can be easily transferred to curved surfaces, showing excellent application potential.

本发明的其它优点、目标和特征将部分通过下面的说明体现,部分还将通过对本发明的研究和实践而为本领域的技术人员所理解。Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention.

附图说明BRIEF DESCRIPTION OF THE DRAWINGS

图1为实施例1局部润湿性可调控的凹角结构的制备流程示意图;FIG1 is a schematic diagram of the preparation process of the concave angle structure with adjustable local wettability in Example 1;

图2为实施例1制备的局部润湿性可调控的凹角结构的SEM照片;FIG2 is a SEM photograph of a concave angle structure with adjustable local wettability prepared in Example 1;

图3为实施例1、对比例1-对比例2制备的凹角结构在空气中的减阻速度对比图;FIG3 is a comparison diagram of the drag reduction speed in air of the concave angle structures prepared in Example 1 and Comparative Example 1-Comparative Example 2;

图4为实施例1、对比例1-对比例2制备的凹角结构在重复实验下减阻率的变化对比图。FIG4 is a comparison diagram of the changes in drag reduction rate of the concave corner structures prepared in Example 1 and Comparative Example 1-Comparative Example 2 under repeated experiments.

具体实施方式Detailed ways

下面结合附图对本发明做进一步的详细说明,以令本领域技术人员参照说明书文字能够据以实施。The present invention will be further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

应当理解,本文所使用的诸如“具有”、“包含”以及“包括”术语并不排除一个或多个其它元件或其组合的存在或添加。It should be understood that terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

实施例1Example 1

如图1所示,本实施例提出一种局部润湿性可调控的凹角结构的制备方法,包括以下步骤:As shown in FIG1 , this embodiment provides a method for preparing a concave angle structure with adjustable local wettability, comprising the following steps:

步骤一:使用飞秒激光在聚苯乙烯(PS)板表面上连续绘制预编程的二维圆,扫描功率为140mw,扫描速度为50mm/s,扫秒次数为65次,通过烧蚀将二维圆内PS层与x-y平面上的基体分离,随着激光扫描圆的次数增加,激光累积的热量导致PS收缩生长,形成微柱结构;Step 1: Use a femtosecond laser to continuously draw a pre-programmed two-dimensional circle on the surface of a polystyrene (PS) plate. The scanning power is 140mw, the scanning speed is 50mm/s, and the number of scans is 65 times. The PS layer in the two-dimensional circle is separated from the substrate on the x-y plane by ablation. As the number of laser scanning circles increases, the accumulated heat of the laser causes the PS to shrink and grow, forming a microcolumn structure.

步骤二:在微柱结构顶部覆盖一层铝箔胶带,利用飞秒激光连续绘制二维圆,直至切割出蘑菇头顶部结构,并撕除多余铝箔胶带,得到蘑菇头微柱结构;Step 2: Cover the top of the micro-column structure with a layer of aluminum foil tape, use a femtosecond laser to continuously draw a two-dimensional circle until the mushroom head top structure is cut out, and tear off the excess aluminum foil tape to obtain a mushroom head micro-column structure;

步骤三:在聚苯乙烯(PS)板整体包括蘑菇头微柱结构表面喷涂SOFT99旗下的产品Glaco溶液,喷涂距离为10cm,得到超疏水涂层;Step 3: Spraying Glaco solution, a product of SOFT99, on the entire polystyrene (PS) board including the surface of the mushroom head micro-column structure at a spraying distance of 10 cm to obtain a super hydrophobic coating;

步骤四:利用飞秒激光原位扫除铝箔表面中心局部区域的超疏水涂层,加工出亲水顶点,制备出局部润湿性可调控的凹角结构;将本实施例制备得到的凹角结构记为HMMs。Step 4: Use a femtosecond laser to in-situ remove the super-hydrophobic coating in the central local area of the aluminum foil surface, process the hydrophilic vertex, and prepare a concave angle structure with adjustable local wettability; the concave angle structure prepared in this example is recorded as HMMs.

测得实施例1中凹角结构接触角为121°,滚动角为90°,具有高黏附性,在经过100次减阻实验后,减阻率为43.7%。The contact angle of the concave angle structure in Example 1 was measured to be 121°, the rolling angle was 90°, and it had high adhesion. After 100 drag reduction tests, the drag reduction rate was 43.7%.

对比例1Comparative Example 1

本对比例提出一种局部润湿性可调控的凹角结构的制备方法,该制备方法包含以下步骤:This comparative example proposes a method for preparing a concave angle structure with adjustable local wettability, and the preparation method comprises the following steps:

步骤一:微柱结构表面的加工:使用飞秒激光在聚苯乙烯(PS)板表面上连续绘制预编程的二维圆,扫描功率为140mw,扫描速度为50mm/s,扫秒次数为65次,通过烧蚀将二维圆内PS层与x-y平面上的基体分离,随着激光扫描圆的次数增加,激光累积的热量导致PS收缩生长,形成微柱结构表面;Step 1: Processing of micro-column structure surface: Use femtosecond laser to continuously draw pre-programmed two-dimensional circles on the surface of polystyrene (PS) plate, with a scanning power of 140mw, a scanning speed of 50mm/s, and a scanning frequency of 65 times. The PS layer in the two-dimensional circle is separated from the substrate on the x-y plane by ablation. As the number of laser scanning circles increases, the accumulated heat of the laser causes the PS to shrink and grow, forming a micro-column structure surface.

步骤二:喷涂超疏水涂层:采用SOFT99旗下的产品Glaco溶液,用喷枪将在距离聚苯乙烯(PS)板10cm出喷涂超疏水涂层;将本对比例制备得到的凹角结构记为SHMs。Step 2: Spraying super-hydrophobic coating: Using Glaco solution, a product of SOFT99, a super-hydrophobic coating was sprayed on a polystyrene (PS) plate at a distance of 10 cm using a spray gun; the concave corner structure prepared in this comparative example was recorded as SHMs.

测得对比例1中结构表面的接触角为154°,滚动角为4°,在经过100次减阻实验后,减阻率降为18.2%。The contact angle of the structure surface in Comparative Example 1 was measured to be 154°, and the rolling angle was 4°. After 100 drag reduction tests, the drag reduction rate dropped to 18.2%.

对比例2Comparative Example 2

本对比例提出一种局部润湿性可调控的凹角结构,该制备方法包含以下步骤:This comparative example proposes a concave angle structure with adjustable local wettability, and the preparation method comprises the following steps:

步骤一:凹角结构表面的加工:使用飞秒激光在聚苯乙烯(PS)板表面上连续绘制预编程的二维圆,扫描功率为140mw,扫描速度为50mm/s,扫秒次数为65次,通过烧蚀将二维圆内PS层与x-y平面上的基质分离,随着激光扫描圆的次数增加,激光累积的热量导致PS收缩生长,因此形成了微柱结构;Step 1: Processing of the concave angle structure surface: Use a femtosecond laser to continuously draw a pre-programmed two-dimensional circle on the surface of a polystyrene (PS) plate, with a scanning power of 140mw, a scanning speed of 50mm/s, and a scanning number of 65 times. The PS layer in the two-dimensional circle is separated from the matrix on the x-y plane by ablation. As the number of laser scanning circles increases, the accumulated heat of the laser causes the PS to shrink and grow, thus forming a microcolumn structure.

步骤二:接着在微柱结构阵列顶部覆盖的铝箔胶带,利用飞秒激光原位连续绘制二维圆,直至切割出凹角顶部结构,并撕除多余铝箔胶带,得到凹角结构;Step 2: Then, on the aluminum foil tape covering the top of the micro-pillar structure array, a femtosecond laser is used to continuously draw a two-dimensional circle in situ until the concave corner top structure is cut out, and the excess aluminum foil tape is torn off to obtain the concave corner structure;

步骤三:喷涂超疏水涂层:采用SOFT99旗下的产品Glaco溶液,用喷枪将在距离聚苯乙烯(PS)板10cm出喷涂超疏水涂层;将本对比例制备得到的凹角结构记为SHMMs。Step 3: Spraying super-hydrophobic coating: Using Glaco solution, a product of SOFT99, a super-hydrophobic coating was sprayed on a polystyrene (PS) plate at a distance of 10 cm using a spray gun; the concave corner structure prepared in this comparative example was recorded as SHMMs.

测得实施例2中结构表面的接触角为:152°,滚动角为:6°,在经过100次减阻实验后,减阻率为40.9%。The contact angle of the structure surface in Example 2 was measured to be 152°, and the rolling angle was 6°. After 100 drag reduction experiments, the drag reduction rate was 40.9%.

应用例1Application Example 1

本应用例提供了一种局部润湿性可调控的凹角结构的应用,局部润湿性可调控的凹角结构由实施例1制备得到,局部润湿性可调控的凹角结构应用于在船舶和航行器外表面构建实现水下减阻的疏水微结构层。This application example provides an application of a concave angle structure with adjustable local wettability. The concave angle structure with adjustable local wettability is prepared by Example 1. The concave angle structure with adjustable local wettability is used to construct a hydrophobic microstructure layer on the outer surface of ships and aircraft to achieve underwater drag reduction.

分别测定原始聚苯乙烯微柱结构(Hs)在空气和水中的减阻速度,实施例1制备的凹角结构(HMMs)、对比例1制备的凹角结构(SHMs)、对比例2制备的凹角结构(SHMMs)在水中的减阻速度,得到图3,从图3可以看出,Hs在空气中通过减阻测试光门的速度为176mm/s,在水阻力的影响下,其水下通过速度降至159mm/s。SHMs、SHMMs和HMMs的水下通过速度分别为165.9mm/s、168.6mm/s和166.8mm/s。其对应的减阻率分别为40.5%、56.4%和45.8%,均具有明显的减阻效果。The drag reduction speeds of the original polystyrene microcolumn structure (Hs) in air and water, the drag reduction speeds of the concave angle structure (HMMs) prepared in Example 1, the concave angle structure (SHMs) prepared in Comparative Example 1, and the concave angle structure (SHMMs) prepared in Comparative Example 2 in water were measured respectively, and Figure 3 was obtained. It can be seen from Figure 3 that the speed of Hs passing through the drag reduction test light gate in the air is 176 mm/s. Under the influence of water resistance, its underwater passing speed is reduced to 159 mm/s. The underwater passing speeds of SHMs, SHMMs and HMMs are 165.9 mm/s, 168.6 mm/s and 166.8 mm/s, respectively. The corresponding drag reduction rates are 40.5%, 56.4% and 45.8%, respectively, all of which have obvious drag reduction effects.

分别测定实施例1制备的凹角结构(HMMs)、对比例1制备的凹角结构(SHMs)、对比例2制备的凹角结构(SHMMs)在0~100次减阻试验过程中的减阻率数据,得到图4,从图4可以看出:在75~100次减速试验中,实施例1制备得到的凹角结构比对比例1和对比例2具有更大的减阻率,说明实施例1制备得到的凹角结构在水下能更稳定的钉扎住气膜,经过多次实验后其减阻率基本不发生改变。The drag reduction rate data of the concave angle structure (HMMs) prepared in Example 1, the concave angle structure (SHMs) prepared in Comparative Example 1, and the concave angle structure (SHMMs) prepared in Comparative Example 2 during 0 to 100 drag reduction tests were measured respectively, and Figure 4 was obtained. It can be seen from Figure 4 that in 75 to 100 deceleration tests, the concave angle structure prepared in Example 1 has a greater drag reduction rate than Comparative Examples 1 and 2, indicating that the concave angle structure prepared in Example 1 can pin the air film more stably underwater, and its drag reduction rate does not change substantially after multiple experiments.

这里说明的设备数量和处理规模是用来简化本发明的说明的。对本发明的应用、修改和变化对本领域的技术人员来说是显而易见的。The number of devices and processing scales described here are used to simplify the description of the present invention. Applications, modifications and variations of the present invention will be obvious to those skilled in the art.

尽管本发明的实施方案已公开如上,但其并不仅仅限于说明书和实施方式中所列运用,它完全可以被适用于各种适合本发明的领域,对于熟悉本领域的人员而言,可容易地实现另外的修改,因此在不背离权利要求及等同范围所限定的一般概念下,本发明并不限于特定的细节和这里示出与描述的图例。Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims (7)

1.一种局部润湿性可调控的凹角结构的制备方法,其特征在于,包括以下步骤:1. A method for preparing a concave angle structure with adjustable local wettability, characterized in that it comprises the following steps: 步骤一:利用激光在基体材料的表面诱导微柱自生长得到微柱结构阵列;Step 1: Using laser to induce micro-pillar self-growth on the surface of the substrate material to obtain a micro-pillar structure array; 步骤二:在微柱结构顶部覆盖材质不同于基体材料的异质材料胶带,利用飞秒激光在异质材料胶带表面原位制备出凹角顶部结构,得到蘑菇头微柱结构;Step 2: Cover the top of the micro-column structure with a heterogeneous material tape whose material is different from the base material, and use a femtosecond laser to in-situ prepare a concave corner top structure on the surface of the heterogeneous material tape to obtain a mushroom head micro-column structure; 步骤三:在基体材料整体包括蘑菇头微柱结构表面喷涂超疏水涂层;Step 3: spraying a super-hydrophobic coating on the entire substrate material including the surface of the mushroom head micro-column structure; 步骤四:利用飞秒激光原位扫除异质材料胶带表面中心局部区域的超疏水涂层,加工出亲水顶点,制备出局部润湿性可调控的凹角结构;Step 4: Use a femtosecond laser to in-situ sweep away the super-hydrophobic coating in the central local area of the surface of the heterogeneous material tape, process the hydrophilic vertex, and prepare a concave angle structure with adjustable local wettability; 所述基体材料为热缩性聚苯乙烯;The base material is heat-shrinkable polystyrene; 所述步骤一中,使用飞秒激光在基体材料表面上连续绘制预编程的二维圆,通过烧蚀将二维圆内基体材料与x-y平面上的基体材料分离,随着激光扫描圆的次数增加,激光累积的热量导致底层基体材料收缩生长,形成微柱结构阵列。In the step 1, a femtosecond laser is used to continuously draw a pre-programmed two-dimensional circle on the surface of the substrate material, and the substrate material in the two-dimensional circle is separated from the substrate material on the x-y plane by ablation. As the number of times the laser scans the circle increases, the accumulated heat of the laser causes the underlying substrate material to shrink and grow, forming a microcolumn structure array. 2.根据权利要求1所述的局部润湿性可调控的凹角结构的制备方法,其特征在于,所述步骤一中,激光的扫描功率为100~200mW,扫描速度为30~100mm/s,每个微柱结构的扫描次数为50~80次。2. The method for preparing a concave angle structure with adjustable local wettability according to claim 1, characterized in that in the step 1, the scanning power of the laser is 100-200 mW, the scanning speed is 30-100 mm/s, and the number of scans for each microcolumn structure is 50-80 times. 3.根据权利要求1所述的局部润湿性可调控的凹角结构的制备方法,其特征在于,所述步骤二中的异质材料胶带的材料包括铝箔、聚四氟乙烯、聚对苯二甲酸乙二醇酯、聚酰亚胺、聚二甲基硅氧烷中的一种。3. The method for preparing a concave angle structure with adjustable local wettability according to claim 1, characterized in that the material of the heterogeneous material tape in step 2 comprises one of aluminum foil, polytetrafluoroethylene, polyethylene terephthalate, polyimide, and polydimethylsiloxane. 4.根据权利要求1所述的局部润湿性可调控的凹角结构的制备方法,其特征在于,所述步骤二中,在微柱结构阵列顶部覆盖的异质材料胶带上,利用飞秒激光原位连续绘制二维圆,直至切割出凹角顶部结构,并撕除多余异质材料。4. The method for preparing a concave angle structure with adjustable local wettability according to claim 1 is characterized in that in the step 2, a femtosecond laser is used to continuously draw a two-dimensional circle in situ on the heterogeneous material tape covering the top of the microcolumn structure array until the concave angle top structure is cut out, and the excess heterogeneous material is torn off. 5.根据权利要求1所述的局部润湿性可调控的凹角结构的制备方法,其特征在于,凹角结构表面顶部异质材料胶带厚度为50μm。5. The method for preparing a concave angle structure with adjustable local wettability according to claim 1, characterized in that the thickness of the heterogeneous material tape on the top of the concave angle structure surface is 50 μm. 6.根据权利要求1所述的局部润湿性可调控的凹角结构的制备方法,其特征在于,所述步骤三中,超疏水涂层的材料包括Glaco溶液和疏水二氧化硅颗粒,超疏水涂层的喷涂方法为用喷枪将在距离基体材料10cm处喷涂。6. The method for preparing a concave angle structure with adjustable local wettability according to claim 1, characterized in that in the step 3, the material of the super-hydrophobic coating comprises a Glaco solution and hydrophobic silica particles, and the super-hydrophobic coating is sprayed with a spray gun at a distance of 10 cm from the base material. 7.一种局部润湿性可调控的凹角结构的应用,所述局部润湿性可调控的凹角结构由权利要求1-6任一项所述的局部润湿性可调控的凹角结构的制备方法制备得到,其特征在于,所述局部润湿性可调控的凹角结构应用于在船舶和航行器外表面构建实现水下减阻的疏水微结构层。7. An application of a concave angle structure with locally adjustable wettability, wherein the concave angle structure with locally adjustable wettability is prepared by the preparation method of a concave angle structure with locally adjustable wettability according to any one of claims 1 to 6, and is characterized in that the concave angle structure with locally adjustable wettability is used to construct a hydrophobic microstructure layer on the outer surface of ships and aircraft to achieve underwater drag reduction.
CN202311854574.0A 2023-12-29 2023-12-29 Preparation method of reentrant corner structure with adjustable local wettability Active CN117798504B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311854574.0A CN117798504B (en) 2023-12-29 2023-12-29 Preparation method of reentrant corner structure with adjustable local wettability

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311854574.0A CN117798504B (en) 2023-12-29 2023-12-29 Preparation method of reentrant corner structure with adjustable local wettability

Publications (2)

Publication Number Publication Date
CN117798504A CN117798504A (en) 2024-04-02
CN117798504B true CN117798504B (en) 2024-06-07

Family

ID=90431405

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311854574.0A Active CN117798504B (en) 2023-12-29 2023-12-29 Preparation method of reentrant corner structure with adjustable local wettability

Country Status (1)

Country Link
CN (1) CN117798504B (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103738913A (en) * 2013-12-31 2014-04-23 中山大学 Method for manufacturing quasi-three-dimensional micron-nanometer column array
CN205062210U (en) * 2015-10-29 2016-03-02 广东工业大学 Super thin oily surface texture of electrotyping forming
CN109226973A (en) * 2018-10-30 2019-01-18 江苏大学 A kind of laser-electrochemical deposition prepares the system and method for bionic super-hydrophobic metal surface
CN115716928A (en) * 2022-11-22 2023-02-28 西南科技大学 Preparation method of superamphiphobic surface with inclined stepped mushroom head microcolumn structure
TWM645800U (en) * 2023-06-02 2023-09-01 日揚科技股份有限公司 Laser-treated anti-deposition object

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE112013005113T5 (en) * 2012-10-23 2015-08-27 Imra America, Inc. Pulsed laser processing method for the production of superhydrophobic surfaces

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103738913A (en) * 2013-12-31 2014-04-23 中山大学 Method for manufacturing quasi-three-dimensional micron-nanometer column array
CN205062210U (en) * 2015-10-29 2016-03-02 广东工业大学 Super thin oily surface texture of electrotyping forming
CN109226973A (en) * 2018-10-30 2019-01-18 江苏大学 A kind of laser-electrochemical deposition prepares the system and method for bionic super-hydrophobic metal surface
CN115716928A (en) * 2022-11-22 2023-02-28 西南科技大学 Preparation method of superamphiphobic surface with inclined stepped mushroom head microcolumn structure
TWM645800U (en) * 2023-06-02 2023-09-01 日揚科技股份有限公司 Laser-treated anti-deposition object

Also Published As

Publication number Publication date
CN117798504A (en) 2024-04-02

Similar Documents

Publication Publication Date Title
US20070018055A1 (en) Aerodynamically efficient surface
Genç et al. Traditional and new types of passive flow control techniques to pave the way for high maneuverability and low structural weight for UAVs and MAVs
CN103641059A (en) Silicon-pillared metal film nano-structure array and preparation method thereof
CN117798504B (en) Preparation method of reentrant corner structure with adjustable local wettability
CN106828876B (en) A forward-swept natural laminar flow wing suitable for medium and short-range high-speed civil aircraft
CN112090710A (en) Multi-biological-characteristic inspired 'fog collection' composite double-sided miracle membrane and preparation method thereof
Hu et al. Drag reduction of turbulent boundary layer over sawtooth riblet surface with superhydrophobic coat
CN103678774B (en) Designing method for supersonic velocity thrust exhaust nozzle considering inlet parameter unevenness
Rathay et al. Parametric study of synthetic-jet-based control for performance enhancement of a vertical tail
CN115258033A (en) Micro-groove bionic drag reduction structure and preparation method thereof
CN107480402A (en) A kind of plane pneumatically captures SOT state of termination coverage and determines method
CN107284650B (en) A kind of Supercritical Airfoils With Natural Laminar Flow applied to intermediate range civil aircraft swept back wing
CN106563626A (en) Preparation method of super-hydrophobic resistance-reducing coating
Gong et al. On the aerodynamic loads and flow statistics of airfoil with deformable vortex generators
CN104777838B (en) Continuous variational inclination angle spraying track planning method for corner characteristic curved surface
CN202166827U (en) Coating equipment
CN112892623A (en) Surface channel structure for droplet directional control and preparation method thereof
Saito et al. Fluid drag reduction by penguin-mimetic laser-ablated riblets with yaw angles
CN107878748A (en) A kind of across medium aircraft casing structure and aircraft
CN112027051A (en) Film drag reduction mechanism suitable for aircraft fuselage
CN106752214A (en) A kind of bionical anti-freeze surface based on the improvement of noncontinuity wetability
CN116443238A (en) Virtual variable pit plasma turbulence friction drag reduction device and preparation method
CN111634881A (en) A method for preparing a new underwater spanwise grooved microstructure drag-reducing surface
CN222182150U (en) Structure for inducing water drop to move in targeted manner on surface of super-hydrophobic coating
US20230219684A1 (en) Enhanced controlled aerodynamics and hydrodynamics over surfaces patterned with hydrophilic and hydrophobic coatings

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant