Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 628, Issue -, Pages 1070-1081Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2022.08.017
Keywords
Waterborne polyurethane; Anti-smudge; Self-cleaning; High transparency; Coating
Categories
Funding
- National Natural Science Foundation of China [22178238]
- Pioneers & Leader Research and Development Program of Zhejiang Province [2022C01190]
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A novel anti-smudge coating based on waterborne polyurethane, polydimethylsiloxane, and hexamethoxymethylmelamine has been developed. The coating exhibits excellent transparency, resistance to liquid corrosion, and anti-smudge capabilities, even when subjected to bending or impact.
A novel anti-smudge coating, based on waterborne polyurethane (WPU), Polydimethylsiloxane (PDMS) and Hexamethoxymethylmelamine (HMMM) was constructed. Specifically, hydroxyl capped WPU emulsions grafted with PDMS (WPU-g-PDMSx) were prepared firstly, then the Hexamethoxymethylmelamine (HMMM) was used as the crosslinking agent to block the polar hydrophilic hydroxyl groups and the carboxyl groups in WPU-g-PDMSx and increase the cross-linking density of the coating. Oily markers, water, hexadecane, fingerprint liquid, and common liquids in life (milk, coffee, ink and cooking oil) were utilized to demonstrate the anti-graffiti and self-cleaning characteristics of coatings. Aside from having great transparency and exceptional resistance to liquid corrosion, the coating still retains its anti-smudge capabilities even when bent or impacted, and they also exhibit 5B adhesion and 5H pencil hardness. This work provides novel idea and strategy for the preparation of WPU anti-smudge coatings. (C) 2022 Elsevier Inc. All rights reserved.
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