Construction method of typical softwood superhydrophobic surface

A technology of super-hydrophobic surface and coniferous wood, which is applied in wood treatment, wood impregnation, wood impregnation, etc., can solve the problems of high cost of preparation method, complicated operation of preparation method, etc., and achieves low price, simple and easy spraying process, convenient and convenient. effect of operation

Inactive Publication Date: 2020-03-31
SOUTHWEST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to previous studies, there are two ways to prepare superhydrophobic surfaces: (1) constructing micro-nano-scale roughness on the surface of low surface free energy materials; (2) chemically modifying rough substrates with low surface free energy materials; The cost of the

Method used

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  • Construction method of typical softwood superhydrophobic surface
  • Construction method of typical softwood superhydrophobic surface
  • Construction method of typical softwood superhydrophobic surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Masson pine is a typical coniferous material. Therefore, in this embodiment, the cross-section of masson pine is selected as the substrate, and the cross-section of masson pine is used as the spraying surface. The construction method of the typical softwood superhydrophobic surface that this embodiment provides, such as figure 1 shown, including the following steps:

[0047] Step S1, substrate surface pretreatment: Process the masson pine into a wooden block of length × width × height = 25mm × 20mm × 8mm, use 120 mesh sandpaper for sanding treatment, and blow it with an air compressor with an exhaust pressure of 0.7Mpa Sweep for 15 seconds, then wash twice with distilled water and twice with 75% medical alcohol to remove dust and impurities on the surface of the substrate, and finally dry it in an oven at 102°C for 6 hours, and store it for spraying;

[0048] Step S2, Nano-Cu 2 Preparation of O-modified phenolic resin blend solution (the preparation principle is as fo...

Embodiment 2

[0060] The specific implementation steps of this embodiment and Example 1 are all the same, and the difference is: 0.55 g of surfactant added in step S2 (wherein, the content of sodium hexametaphosphate is 20%, the content of silane coupling agent KH550 20%, the content of polyvinylpyrrolidone is 60%), the concentration is 7% polyvinyl alcohol aqueous solution 50g; Nano Cu in step S3 2 The number of sprayed layers of the O-modified phenolic resin blended diluent is 8 layers; the stearic acid ethanol solution in step S4 is soaked for 3 hours at normal pressure. The static contact angle of water on the cross-section of the modified masson pine obtained in Example 2 is 151.5° (the test water drop is 4 μL), and the super-hydrophobic surface property is obtained. The treatment results are as follows: Figure 7 shown.

Embodiment 3

[0062] The specific implementation steps of this embodiment are the same as those of Example 1, except that: 0.5 g of surfactant added in step S2 (wherein, the content of sodium hexametaphosphate is 20%, and the content of silane coupling agent KH550 is 20%, the content of polyvinylpyrrolidone is 60%), the concentration is 50g of polyvinyl alcohol aqueous solution of 7.5%; Nano Cu in step S3 2 The number of sprayed layers of the O-modified phenolic resin blended diluent is 4 layers; the stearic acid ethanol solution in step S4 is soaked for 1 h at normal pressure. The static water contact angle of the cross-section of the modified masson pine obtained in Example 3 is 151° (the test water drop is 4 μL), and the superhydrophobic surface performance is obtained. The treatment results are as follows: Figure 8 shown.

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Abstract

The invention provides a construction method of a typical softwood superhydrophobic surface. The construction method includes: S1, pretreatment of surface of a base material; S2, preparation of a nanoCu2O modified phenolic resin blend liquid; S3, diluting and spray coating treatment; S4, normal pressure impregnation of stearic acid ethanol solution. In the invention, with the phenolic resin adhesive as a carrier and the nano Cu2O as a hydrophobic material, through the spray coating method with combination of the low surface energy substance, stearic acid, constructive modification of a superhydrophobic surface of typical softwood is carried out to achieve excellent hydrophobic effect. The spray coating is simple and is low in raw material cost, wherein the nano Cu2O can be generated during the synthesis of the phenolic resin adhesive, so that the preparation cost of the superhydrophobic surface of typical softwood is significantly reduced, and the method is low in cost, is simple in operation and has good hydrophobic protective effect, allows large-scale production, has extensive application prospect, is good in practicability, has high industrial promotion value, and brings beneficial condition to industrial production of large-size superhydrophobic wood material at large scale.

Description

technical field [0001] The invention belongs to the technical field of wood protection and modification, and in particular relates to a method for constructing a super-hydrophobic surface of a typical coniferous material. Background technique [0002] Superhydrophobic surfaces refer to solid surfaces with a water static contact angle greater than 150°. Due to their significance in industrial applications, they have received great attention from various industries in recent years. The applications of superhydrophobic surfaces and coatings are very extensive, including but not limited to self-cleaning, anti-fouling, anti-icing, anti-fog, waterproof and breathable clothing, anti-corrosion coatings, oil-water separation, microfluidic drag reduction, and liquid transport and drainage. The preparation of cellulose-based superhydrophobic materials, as a current research hotspot, has also attracted the attention of many scholars. [0003] Wood has the advantages of light weight, hi...

Claims

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Application Information

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IPC IPC(8): B27K3/02B27K3/50B27K3/52B27K5/04
CPCB27K3/02B27K3/0207B27K3/0214B27K3/0228B27K3/50B27K3/52B27K5/04B27K2240/70
Inventor 高伟展可解林坤郭聪楠赵思思夏僧蔚陆全雄
Owner SOUTHWEST FORESTRY UNIVERSITY
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