Abstract
A silicone with hydrogen bonds and double bonds in the side chain was synthesized by blending method, and its structure was determined using Fourier transform infrared (FTIR) and nuclear magnetic resonance (1H NMR). Then, the silicone was used to modify Al2O3, and the chemical composition and thermal stability of Al2O3 were verified by FTIR, X-ray diffraction (XRD), thermal gravimetric analysis (TG) and water contact angle (WCA). Polyacrylate was modified by silicone, modified Al2O3, and silicone and modified Al2O3, respectively, the obtained emulsion was called silicone/polyacrylate composite emulsion, Al2O3/polyacrylate composite emulsion and Al2O3–silicone/polyacrylate composite emulsion. To verify that both silicone and Al2O3 could improve the thermal stability and hydrophobicity of the composites to a certain extent, the composite emulsion and composite emulsion film were tested and characterized. FTIR confirmed the successful introduction of silicone and modified Al2O3 into the polyacrylate emulsion. Spherical particles with a diameter of about 68 nm were observed from particle size analysis and transmission electron microscopy (TEM). Scanning electron microscope (SEM) showed the distribution state of the modified monomer in the polymer matrix. TG and WCA analysis showed that the introduction of silicone and modified Al2O3 could improve the thermal stability and hydrophobicity of the polyacrylate film, and the contact angle of the silicone–Al2O3 composite film could reach 92°. Finally, the modified Al2O3 and silicone/polyacrylate were mixed and sprayed on the substrate to prepare a superhydrophobic coating, and the coating was characterized by atomic force microscope (AFM), SEM and WCA. The coating had excellent temperature resistance and self-cleaning properties, and the superhydrophobic filter cloth prepared by spraying the mixed emulsion on the filter cloth had excellent oil–water separation effect.
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The authors acknowledge that this work was supported by the National Natural Science Foundation of China (51568048).
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The authors acknowledge that this work was supported by the National Natural Science Foundation of China (51568048).
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CM contributed to conceptualization, methodology, software, formal analysis, investigation and writing—original draft. YL contributed to software, formal analysis, investigation and visualization. SZ contributed to validation, investigation and resources. JZ and HL contributed to validation and investigation. ZQ contributed to writing—review and editing, supervision and project administration.
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Ma, C., Li, Y., Zhan, S. et al. Synthesis and characterization of polyacrylate composite and its application in superhydrophobic coating based on silicone-modified Al2O3. Polym. Bull. 79, 5279–5303 (2022). https://doi.org/10.1007/s00289-021-03741-7
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DOI: https://doi.org/10.1007/s00289-021-03741-7