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Preparation method of surface super-hydrophobic composite material

A composite material and super-hydrophobic technology, which is applied in the field of preparation of surface super-hydrophobic composite materials, can solve the problems of low coating bonding strength, increased process, thermal damage, etc.

Inactive Publication Date: 2020-07-07
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is to add post-treatment process and thermal spraying process to prepare super-hydrophobic coating after the composite material is formed, which adds more processes, the process is cumbersome and the coating bonding strength is low.
[0006] CN201110077761 discloses a method for preparing a hydrophobic coating by thermal spraying. It uses thermal spraying technology to spray composite powder (micron-scale metal or alloy powder coated nano-scale ceramic powder) on the surface of the substrate to form a micro-nano secondary structure. Then use a hydrophobic organic coating to modify it to form a super-hydrophobic bionic surface. Due to the large thermal effect of thermal spraying, this method is suitable for spraying on metals to manufacture surface micro-nano structures. If it is applied to resin-based composite materials, it will inevitably cause thermal damage. , and the bonding strength is low, so it is not suitable for resin matrix composites

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The steps of the preparation method of this kind of surface superhydrophobic composite material are as follows:

[0033] 1. Preparation of Resin Matrix

[0034] First, weigh 1507g of allyl bisphenol A resin and 157.5g of PEK-C powder into the reactor, stir and mix evenly, and then heat the reactor to 130°C under the action of stirring. After the resin is completely melted, slowly add 1209g of crude double horse resin powder into the reaction kettle, finish adding within 3-5 minutes, the temperature drops to about 110°C, continue heating to 130°C, after the crude double horse resin powder is completely dissolved, Quickly pour the resin from the reaction kettle into a stainless steel bucket, then add 810g of T95 powder, 804g of fine Shuangma powder and 90g of PTFE powder into the bucket, and stir vigorously to obtain the Shuangma resin used for the outer film; in addition, it is prepared according to the same process The inner film is made of Shuangma resin, without addi...

Embodiment 2

[0043] The steps of the preparation method of this kind of surface superhydrophobic composite material are as follows:

[0044] 1. Preparation of Resin Matrix

[0045] First, weigh 1507g of allyl bisphenol A resin and 157.5g of PEK-C powder into the reactor, stir and mix evenly, and then heat the reactor to 130°C under the action of stirring. After the resin is completely melted, slowly add 1209g of crude double horse resin powder into the reaction kettle, finish adding within 3-5 minutes, the temperature drops to about 110°C, continue heating to 130°C, after the crude double horse resin powder is completely dissolved, Quickly pour the resin from the reaction kettle into a stainless steel bucket, then add 810g of T95 powder, 804g of fine Shuangma resin powder and 90g of PTFE powder into the bucket, and stir vigorously to obtain the Shuangma resin used for the outer film; in addition, follow the same process Shuangma resin is used to prepare the inner film, without adding PTFE...

Embodiment 3

[0054] The steps of the preparation method of this kind of surface superhydrophobic composite material are as follows:

[0055] 1. Preparation of Resin Matrix

[0056] First, weigh 1507g of allyl bisphenol A resin and 157.5g of PEK-C powder into the reactor, stir and mix evenly, and then heat the reactor to 130°C under the action of stirring. After the resin is completely melted, slowly add 1209g of crude double horse resin powder into the reaction kettle, and finish adding within 3-5 minutes. At this time, the temperature drops to about 110°C, continue heating to 130°C, and wait for the crude double horse resin powder to completely dissolve Finally, quickly pour the resin from the reaction kettle into the stainless steel barrel, then add 810g T95 powder, 804g fine Shuangma resin powder and 225g PTFE powder into the bucket respectively, and stir it vigorously to obtain the Shuangma resin used for the outer film; Shuangma resin is used to prepare the inner layer film with adva...

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Abstract

The invention relates to a preparation method of a surface super-hydrophobic composite material. According to the technical scheme, PTFE micro-powder particles with strong super-hydrophobic property and excellent high-temperature resistance are used as super-hydrophobic components to be added into a resin matrix for an outer-layer adhesive film, so that the super-hydrophobic property of the finalcomposite material is improved; matrix resin for an inner adhesive film and an outer adhesive film is respectively prepared, the adhesive films are prepared, a prepreg is prepared by adopting a step-by-step pre-impregnation method; and finally, slitting and paving according to specified width requirements are carried out, and putting into an autoclave for high-temperature curing molding is carriedout, thereby completing the preparation of the super-hydrophobic composite material. The method has the greatest advantages that the super-hydrophobic coating can be integrally formed in the preparation process of the composite material, the binding force between the prepared super-hydrophobic surface layer and the composite material is high, and the super-hydrophobic characteristics of the prepreg and the resin-based composite material can be improved. The super-hydrophobic resin-based composite material prepared by the invention has the advantages of self-cleaning property, strong moistureabsorption resistance, strong freezing resistance, stable hydrophobic property and the like, has great technical advantages, and is of great significance to the application of novel resin-based composite materials for aerospace.

Description

technical field [0001] The invention relates to a method for preparing a surface super-hydrophobic composite material, which belongs to the field of super-hydrophobic composite materials and preparation methods thereof. Background technique [0002] The wettability (also known as wettability) of the solid surface to the liquid is an important property of the material surface. It is the macroscopic performance of the structure and properties of the solid surface, the surface properties of the liquid, and the interaction between solid-liquid two-phase molecules. , the wettability of a solid surface can be measured by two important indicators, the contact angle and the rolling angle. People usually call the surface with a water contact angle greater than 90° a hydrophobic surface, and a surface with a water contact angle greater than 150° is a superhydrophobic surface. For a self-cleaning superhydrophobic surface, it is generally considered that the rolling angle is less than 1...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B37/06B32B37/10C08L79/08C08L63/00C08L27/18C08K7/06C08J5/24
CPCB32B37/06B32B37/10C08J5/24C08J2363/00C08J2379/08C08J2427/18C08K7/06
Inventor 张代军付善龙顾善群陈宇刘燕峰李军陈祥宝
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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