High-density polyethylene superhydrophobic sheet/container with controllable rolling angle and preparation method thereof

Abstract

The invention belongs to the technical field of superhydrophobic material preparation and relates to high-density polyethylene superhydrophobic sheets / containers with controllable rolling angles and their preparation methods. The high-density polyethylene granules are first molded into 10 microns to 2 centimeters through a flat vulcanizer. of high-density polyethylene sheets, and then use a flat vulcanizer to laminate 2 to 4 high-density polyethylene sheets together in the mold, and then cool the laminated high-density polyethylene sheets to room temperature, or Move to the curved surface mold and fit it to the curved surface mold, then cool to room temperature. Finally, peel off the stacked high-density polyethylene sheets by hand, iron pliers or a universal testing machine to obtain a high-density roll-angle-controllable high-density polyethylene sheet. Polyethylene superhydrophobic sheet or container; the method is simple, scientific in principle, easy to operate, low in preparation cost, and environmentally friendly. The prepared superhydrophobic sheet / container has a high water contact angle and a controllable rolling angle.

Description

Technical field: [0001] The invention belongs to the technical field of preparation of superhydrophobic materials, and relates to a high-density polyethylene superhydrophobic sheet / container with controllable rolling angle and a preparation method thereof. Background technique: [0002] Hydrophobicity is one of the important characteristics of the material surface, which is determined by the chemical composition and micro-geometric structure of the surface. When a droplet comes into contact with a material surface, it either maintains the droplet shape or spreads to form a liquid film on the surface, a property usually measured by the water contact angle (WCA). Surfaces with a contact angle greater than 150° and a rolling angle less than 10° are generally referred to as superhydrophobic surfaces. The unique surface properties of superhydrophobic materials make them widely used in fields such as waterproof, antifouling, antifog, self-cleaning, fluid drag reduction, microflui...

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Problems solved by technology

Han Jianmei et al. (Journal of Colloid and Interface Science, 2008, 326: 360–365) reported that acrylic acid was grafted on the surface of high-density polyethylene polished by sandpaper by bulk photopolymerization, and the photopolymerization time was well controlled to obtain super Hydrophobic surface, and under different conditions, the adhesion of the surface is very different. This method needs to use volatile monomer acrylic acid for chemical photopolymerization. It needs to configure photoresist, which involves the uniformity of photopolymerization , product stability, and environmental pollution and cost issues, it is difficult to prepare in large areas; Xianliang Sheng and Jihua Zhang (Langmuir, 2009, 25(12): 6916-6922) reported the preparation of high Density polyethylene nanofiber surface, adjust the pore size and extrusion pressure of the alumina template, the rolling angle can be adjusted between 10° and 90°, this method requires a special nano-alumina template, and high concentration of Sodium hydroxide solution etches and removes the template, the steps are cumbersome, the experiment requirements are high, the cost is high, and it is difficult to industrialize

In addition, there is no report on the green, simple and low-cost preparation method of curved high-density polyethylene superhydrophobic container.

[0005] In summary, superhydrophobic high-density polyethylene with controllable rolling angle (from the ultra-small rolling angle where water droplets can hardly be stabilized to the super-large rolling angle that does not roll when water droplets tilt 90° or 180° on the surface) has been reported. , but the current method has problems such as cumbersome process, difficult control, long cycle, high cost and environmental pollution.

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