期刊
ACS MACRO LETTERS
卷 10, 期 5, 页码 635-641出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsmacrolett.1c00163
关键词
-
资金
- Agency for Science, Technology and Research (A*STAR)
- Science and Engineering Research Council of A*STAR, Singapore [A1786A0027]
This article presents the development of bio-/CO2-derived nonisocyanate polyurethane (NIPU) coatings, which have high levels of renewable carbon and self-healing properties through three different healing mechanisms: thermo-healing, moisture-healing, and self-healing at room temperature. The coatings feature a unique combination of recyclability and intrinsic healing capabilities, making them ideal for sustainable and functional applications.
Polymer coatings having high amounts of renewable carbon and self-healing properties are highly sought after in a sustainability perspective. We report here the development of bio-/CO2-derived nonisocyanate polyurethane (NIPU) coatings which are recyclable and healable via three different types of healing mechanisms. These NIPUs contain furan rings in their main chain which after cross-linking with bismaleimides form organogels having a thermo-reversible sol-gel transition and solvent-borne coatings with improved properties. Judicial selection of the bismaleimide cross-linker structure enabled us to produce recyclable and intrinsic healable coatings mediated by heat (thermo-healing), moisture (moisture-healing), and, more interestingly, dry conditions at room temperature (self-healing). The intrinsic moisture-healing property of NIPU-based coatings is unprecedented and is mainly due to the presence of hydroxyl functionalities in the NIPU structure. The uniqueness of these cross-linked biobased NIPU as recyclable coatings having triple healing sites present in their structure gives these materials potential for sustainable and functional applications.
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