Preparation method of easy-to-demould concrete test mould with super-hydrophobic and super-smooth inner wall

By preparing a superhydrophobic/superslippery surface on the inner wall of the concrete mold, the problem of difficult demolding was solved, and the complete and non-destructive demolding of concrete and the efficient use of the mold were achieved.

CN121007757APending Publication Date: 2025-11-25TAISHAN UNIV
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Patent Information

Application Number
CN202511089387.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2022-10-18
Publication Date
2025-11-25

AI Technical Summary

Technical Problem

Existing concrete molds tend to stick to concrete during demolding, making demolding difficult. Common methods such as detachable molds are inefficient, release agents affect concrete quality, or require additional tools that can damage the molds.

Method used

A superhydrophobic/superslippery surface was prepared on the inner wall of a concrete mold. The micro-nano structure was formed by combining photolithography, vacuum evaporation deposition and chemical immersion. Lubricating oil was then injected to reduce the adhesion between the concrete and the inner wall of the mold.

Benefits of technology

This method enables easy demolding of concrete, avoids damage to specimens, improves work efficiency, reduces cleaning work, and enhances the durability and protective effect of the mold.

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Abstract

The invention discloses a preparation method of an easy-to-demold concrete test mold with super-hydrophobic and super-smooth inner wall, and belongs to the field of concrete test molds. The method comprises the following steps of: a, spin-coating negative photoresist, and obtaining a substrate with an inverted trapezoidal micron structure on the inner wall in an ultraviolet lithography manner; b, depositing a metal layer through vacuum evaporation; c, removing the metal layer on the upper surface of the inverted trapezoidal micron structure on the inner wall of the substrate; d, obtaining a micro-nano hierarchical structure on the metal layer; e, spin-coating molten wax, and after cooling, filling the micron-sized pores with solid wax; f, depositing aluminum through vacuum evaporation, and performing anodic oxidation to obtain a porous metal aluminum surface; g, solid wax is discharged, lubricating oil is injected, the whole pores are filled with the lubricating oil, and the super-hydrophobic and super-smooth surface is obtained; and h, splicing the base to obtain the easy-to-demould concrete test mould with super-hydrophobic and super-smooth performance. The cohesiveness of the concrete and the inner wall of the test mold is reduced, so that the concrete is easily separated from the inner wall of the concrete test mold.
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