Super-hydrophobic phenolic sheet and preparation method thereof

A technology of phenolic resin and laminate, which is applied in lamination, lamination equipment, lamination auxiliary operation, etc., can solve the problems of unsatisfactory, complicated preparation process, and failure to improve the hydrophobicity and wear resistance of phenolic resin laminates. Achieve the effect of convenient operation and simple preparation process

Active Publication Date: 2020-04-10
HUBEI POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the disadvantage of this method is that it does not improve the hydrophobicity and wear resistance of the phenolic resin laminate, and cannot meet the needs of practical applications.
However, the disadvantage of this method is that the preparation process is complicated, and the impact resistance and wear resistance of the laminate have not been improved, so it is difficult to carry out large-scale popularization and application.

Method used

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  • Super-hydrophobic phenolic sheet and preparation method thereof
  • Super-hydrophobic phenolic sheet and preparation method thereof
  • Super-hydrophobic phenolic sheet and preparation method thereof

Examples

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preparation example Construction

[0039] The invention provides a kind of preparation method of superhydrophobic phenolic resin laminate, comprises the steps:

[0040] S1. Preparation of phenolic resin laminate: Prepare a mixed solution of phenolic resin / organic solvent with a predetermined concentration, then use the mixed solution to infiltrate the paper-based material, and dry it at 110-130°C for 20-40 minutes to obtain a prepreg ; Then, the prepreg is stacked and thermocompressed to obtain a phenolic resin laminate;

[0041] S2. Prepare super-hydrophobic coating: prepare a polyvinyl chloride / tetrahydrofuran mixed solution, then add the organic solvent into the mixed solution, and stir to obtain a super-hydrophobic coating;

[0042] S3. Preparation of a superhydrophobic phenolic resin laminate: using the superhydrophobic coating described in step S2 to spray-coat and dry the surface of the phenolic resin laminate described in step S1 to obtain a superhydrophobic phenolic resin laminate.

[0043] Further, i...

Embodiment 1

[0057] see Figure 1-3 Shown, the preparation method of superhydrophobic phenolic resin laminate:

[0058] S1, preparation of phenolic resin laminate:

[0059] Bake the kraft paper for 1 hour at a temperature of 110°C. After drying, put it in a sealed bag and store it in a dry environment; Evenly apply a layer of the above-mentioned phenolic resin mixed solution on both sides of the kraft paper, and let it stand until the phenolic resin completely infiltrates the kraft paper; bake the soaked kraft paper at 110°C for a certain period of time for 30 minutes, take it out after drying, and cool it at room temperature.

[0060] Cut off the edges of the dried and cooled prepregs and cut them to the same size; turn on the flat vulcanizer, set the temperature to 120°C, and adjust the pressure to 2MPa; stack the cut 6 prepregs on the iron On the prepreg, press three iron plates on the prepreg, use ten sheets of paper to separate the prepreg and the iron plate, and separate the prepre...

Embodiment 2

[0071] The difference with embodiment 1 is: as Figure 4 As shown, the phenolic resin-coated laminate prepared in step S1 is subjected to surface grinding pretreatment, and other steps are the same as in Example 1, and will not be repeated here.

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Abstract

The invention provides a super-hydrophobic phenolic sheet and a preparation method thereof. The preparation method comprises the following steps: firstly, preparing a phenolic resin/organic solvent mixed solution with a preset concentration, infiltrating a paper-based material with the prepared mixed solution, and carrying out drying to obtain a prepreg; carrying out stacking hot press molding treatment and pretreatment on the prepreg to obtain a phenolic sheet; then, preparing a polyvinyl chloride/tetrahydrofuran mixed solution, and adding an organic solvent to obtain a super-hydrophobic coating; and finally, subjecting the surface of the phenolic sheet to spraying-drying treatment with the super-hydrophobic coating so as to obtain the super-hydrophobic phenolic sheet. The super-hydrophobic phenolic sheet provided by the invention has impact strength of 11.978 kJ/m<2>, a density of 1.41 g/cm<3>, elastic modulus of 23.8 GPa and bending strength of 642.7 Mpa and a contact angle of 160 degrees or above; and the contact angle of the super-hydrophobic phenolic sheet with kraft paper attached to the substrate of the phenolic sheet can be kept at 155 degrees or above, so the super-hydrophobic phenolic sheet has an excellent hydrophobic property.

Description

technical field [0001] The invention relates to the field of laminate material preparation, in particular to a superhydrophobic phenolic resin laminate and a preparation method thereof. Background technique [0002] As one of the three general-purpose resins, phenolic resin has good adhesion. The cured phenolic resin has high heat resistance, good dielectric properties, excellent ablation resistance and good mechanical properties. Blended with other polymers to achieve high performance and widely used in various fields of national economy such as aerospace, automobile, electronics, machinery, transportation and so on. However, after curing, the phenolic resin has the defects of high brittleness, poor impact resistance and non-abrasion resistance. Moreover, because phenol, one of the raw materials for phenolic resin synthesis, contains a large amount of hydrophilic group phenolic hydroxyl groups, and phenolic hydroxyl groups do not participate in the reaction during the synt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H27/30D21H17/48D21H17/06D21H21/18C09D127/06B32B29/00B32B29/06B32B37/06B32B37/10B32B38/08B32B33/00
CPCB32B29/005B32B29/06B32B33/00B32B37/06B32B37/10B32B38/08B32B2250/26B32B2255/26B32B2255/28B32B2260/028B32B2260/046B32B2307/554B32B2307/558B32B2307/73C09D127/06D21H17/06D21H17/48D21H21/18D21H27/30
Inventor 阮敏范士林李凡奇常忠维刑雅艺吕召春王德华
Owner HUBEI POLYTECHNIC UNIV
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