Mechanical Strong, Highly Adhesive, Recyclable and Transparent Supramolecular Silicone Coatings with Easy Water/Oil Sliding

Traditional silicone materials have poor mechanical properties, poor interfacial adhesion and lack the ability to be reprocessed or recycled. Herein, we developed a novel strategy of incorporating dynamic noncovalent bonds (2-amino-4-hydroxy-6-methylpyrimidine (UPy)) into side chain of silicone back...

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Bibliographic Details
Published in:Chinese journal of polymer science 2023-11, Vol.41 (11), p.1796-1804
Main Authors: Lin, Yu-Cai, Chen, Feng, Yang, Shou-Bin, Gong, Shu-Yue, Luo, Yu-Xiang, Wei, Fang-Fang, Ding, Fu-Chuan, Bai, Wei-Bin, Jian, Rong-Kun
Format: Article
Language:English
Subjects:
Adhesive strength
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Coatings
Condensed Matter Physics
Elastomers
Industrial Chemistry/Chemical Engineering
Mechanical properties
Polymer Sciences
Recyclability
Recycling
Research Article
Service life
Silicones
Siloxanes
Stainless steels
Substrates
Surface layers
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Summary:Traditional silicone materials have poor mechanical properties, poor interfacial adhesion and lack the ability to be reprocessed or recycled. Herein, we developed a novel strategy of incorporating dynamic noncovalent bonds (2-amino-4-hydroxy-6-methylpyrimidine (UPy)) into side chain of silicone backbones to construct supramolecular silicone poly(urea-urethane) (SSPu) coatings with excellent mechanical performance, strong interfacial adhesion and multiple time recycling capability. Impressively, the prepared SSPu is endowed with simultaneously enhanced stiffness (272.0±23.2 MPa) and toughness (8.0±2.0 MJm −3 ). Besides, SSPu shows strong interfacial adhesion (up to 9.0±1.3 MPa) to diverse substrate (stainless steel, aluminum, copper, epoxy and glass) with long term stability. Moreover, SSPu exhibits excellent multi-recyclability and reusability without significantly decrease of its performance. In addition to the abovementioned features, the enrichment of siloxane backbones in the surface layer endows SSPu with robust repellency to water/oil. Our strategy provides a powerful route to fabricate a new multifunctional silicone elastomer. It is highly anticipated that our strategy can effectively extend the service life of silicone coating which can be applied in a wide variety of areas including self-cleaning, antifouling.
ISSN:0256-7679
1439-6203
DOI:10.1007/s10118-023-2966-7