Preparation and Performance Test of the Super-Hydrophobic Polyurethane Coating Based on Waste Cooking Oil

Abstract

In order to solve the problem of dust accumulation on the fin surface of a mine air cooler, a method of preparing super-hydrophobic polyurethane (SPU) coating based on waste cooking oil (WCO) was proposed. Firstly, the polyurethane prepolymer was synthesized with WCO as a raw material, and then the polyurethane prepolymer was modified with amino-terminated polydimethylsiloxane (ATP) to obtain SPU emulsion. The chemical structure and thermal stability of SPU were characterized by infrared spectrum and thermogravimetric analysis. A series of nanocomposites were prepared by combining modified silicon carbide (APT-SiC) particles and SPU emulsions. According to the parameters of pull-off strength, contact angle, sliding angle and thermal conductivity, the filler ratio of nanocomposites was optimized. The test results show that when the content of APT-SiC particles is 20 wt %, super-hydrophobic polyurethane coating can be obtained. The coating has good pull- off strength and thermal conductivity, and the contact angle and sliding angle are 161° and 3°, respectively. In addition, the practical application of the super-hydrophobic polyurethane coating was tested by related experiments. The experimental results show that the coating has good self-cleaning, wear resistance and anti-corrosion performance, can meet the requirements of air coolers in special environments, and has great application prospects.

Investigation of the Effects of Component Ratios on the Properties of Superhydrophobic Polyurethane/Fluorinated Acrylic Co-Polymer/SiO2 Nanocomposite Coatings

“…Inspired by the unique water repelling nature of lotus leaves, superhydrophobic surfaces have been extensively explored for various potential applications, such as anti-fogging, antiicing, anti-corrosion, oil/water separation, self-cleaning and anti-contamination, etc. [1][2][3][4][5][6][7]. Superhydrophobic surface has a water contact angle (WCA) higher than 150 • and a water rolling angle less than 10 • .…”

Recyclable Shape-Memory Waterborne Polyurethane Films Based on Perylene Bisimide Modified Polycaprolactone Diol

“…Polyurethane can be classified into waterborne polyurethane (WPU) and solvent-based polyurethane (SPU), based on the dispersion media. WPU and SPU have many comparable properties, such as high tensile strength, high abrasion resistance, high flexibility, good adhesion and good low-temperature resistance [ 1 , 2 ]. The difference between WPU and SPU is that the production and use of WPU does not release a large amount of volatile organic compounds (VOC), which is an inevitable problem in the production and use of SPU [ 3 , 4 ].…”

The Influence of Silica Nanoparticle-Based Modifying Agent on the Application of Hydrophobic Coatings

“…Y. Cheng et alattempted to address the problem of dust accumulation on the fin surface of a mine air cooler, prepared a superhydrophobic polyurethane (SPU) emulsion from a polyurethane prepolymer made from raw-material waste cooking oil (WCO), modified the emulsion with polydimethylsiloxane and terminated amino polymer (ATP) and developed multiple nanocomposites by incorporating SPU emulsions with modified silicone carbide (APT-SiC) particles; contact and sliding angles, pull-off strength and thermal conductivity were considered with a modified filler ratio in nanocomposites; the researchers produced a superhydrophobic (polyurethane) coating with an APT-SiC particle concentration of 20% by weight; the obtained coating demonstrated high pull-off strength and excellent heat conductivity with a contact angle of 161° [16].…”