超疏水PDMS改性聚氨酯/黄铜复合涂层的制备及性能表征

doi:10.11896/cldb.21060116

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Abstract A composite coating with super-hydrophobicity and low infrared emissivity was prepared by glass rod scraping method using flake brass powders, nano-SiO₂ and polydimethylsiloxane (PDMS) modified polyurethane (PU) as functional pigments, micro-nano structural modifier and adhesive, respectively. The effects of the ratio (mass ratio) of PDMS to PU, the addition amount (quality score) of total fillers and the ratio (mass ratio) of brass powder to nano-SiO₂ on the coating properties were systematically discussed. The results show that the mass ratio of PDMS to PU has an important influence on the adhesion strength and hydrophobic properties of the coating. When the mass ratio of PDMS to PU is 1:9, the coating has outstanding super-hydrophobic properties, the adhesion strength of the coating can reach 1 grade, the water contact angle and sliding angle can reach 155° and 5°, respectively. The total filler addition amount has a significant impact on the coating performance. With the increase of the filler addition amount, the emissivity of the coating increases and the glossiness decreases. When the total filler content is 50%, the coating surface can form an obvious papillary micro-nano rough structure, so that the coating has outstanding super-hydrophobic properties. The mass ratio of brass powder to nano-SiO₂ can obviously affect the emissivity and hydrophobic properties of the coating. When the mass ratio of brass powder to nano-SiO₂ is 6.5:3.5, the coating can have good overall performance and outstanding self-cleaning performance. At this time, the emissivity of the coating can be as low as 0.716;the glossiness and adhesion strength are grade 1.8 and grade 1, respectively;the water contact angle and sliding angle are 151° and 8°, respectively.

Key words： composite coating low infrared emissivity super-hydrophobic self-cleaning adhesion strength glossiness

Published: 25 February 2023 Online: 2023-03-02

CLC number:

TN213

Fund:Natural Science Foundation of China (61705029), Anhui Provincial Natural Science Foundation of China (1808085MF187), Key Projects of the Excellent Young Talents Support Plan in Universities of Anhui Province (gxyqZD2020044), Major Science and Techno-logy Special Project of Anhui Province(202103a05020018), University Student Innovation Training Program Project of Anhui Province (S202010377116),and Student Innovation Training Program Project of Chuzhou University(2020CXXL116).

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	LYU Dandan
	LI Murong
	ZHANG Weigang

Cite this article:

LYU Dandan,LI Murong,ZHANG Weigang. Fabrication and Performance Characterization of PDMS Modified Polyurethane/ Brass Composite Coating with Super-hydrophobicity[J]. Materials Reports, 2023, 37(4): 21060116-6.

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http://www.mater-rep.com/EN/10.11896/cldb.21060116 OR http://www.mater-rep.com/EN/Y2023/V37/I4/21060116

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