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- W3202595577 endingPage "110804" @default.
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- W3202595577 abstract "Bio-based self-healing coating materials have attracted considerable interest owing to the advantages of extended life cycle, renewable raw materials, and performance comparable to petroleum-based coatings. A bio-based self-healing coating material was prepared using multifunctional alamine and bio-based modified acetoacetylated castor oil (MACO) containing acetoacetate moieties as well as acid groups. The MACO was synthesized using a transesterification reaction and thiol-ene click reaction (allowing control of the ratio of acid groups). Based on the different ratios of acid groups of MACO, three coating materials were prepared from an amine-acetoacetate reaction (or amine-carboxylic acid condensation reaction) using multifunctional alamine. The Young’s modulus, crosslinking density (ve), and glass transition temperature (Tg) of our prepared coating materials were improved with higher ratio of acid groups from the MACO. Hence, the ratio of acid groups in the bio-based coating can be employed to readily adjust the mechanical properties. For the bio-based coating of a representative film containing 50 % acid groups of -C = C in castor oil, the elongation strength and tensile strength were as high as 52 % and 5.53 MPa, respectively. The stress-relaxation and mechanical performance recovery experiments revealed that the film had a low activation energy (Ea) of 69 kJ/mol, and a self-healing efficiency of 80 % at 120 °C for 6 h. These results showed that the bio-based self-healing coating material exhibits good self-healing performance." @default.
- W3202595577 created "2021-10-11" @default.
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- W3202595577 date "2021-11-01" @default.
- W3202595577 modified "2023-09-30" @default.
- W3202595577 title "Bio-based self-healing coating material derived from renewable castor oil and multifunctional alamine" @default.
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- W3202595577 doi "https://doi.org/10.1016/j.eurpolymj.2021.110804" @default.
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