In a significant stride towards sustainable maritime materials, researchers have developed a novel method to upcycle waste fluororubbers into high-performance, photocurable vinyl-terminated liquid fluororubbers (VTLF). This breakthrough, led by Donghan Li from the College of Materials Science and Engineering at Shenyang University of Chemical Technology in China, offers a promising solution to the longstanding challenges of recycling and high-value utilization of waste fluororubbers.
The process, detailed in the journal Advanced Science, employs a multifield coupling system that integrates microwave, mechanical, and steady-state temperature fields. This innovative approach facilitates both efficient recycling and high-value transformation of waste fluororubbers. The method begins with controlled oxidative degradation induced by alkali and hydrogen peroxide, yielding carboxyl-terminated liquid fluororubbers (CTLF). Subsequently, a condensation reaction system efficiently converts carboxyl groups into photoreactive vinyl groups, resulting in VTLF with elevated fluorine content (63.1%) and superior temperature resistance (T10% = 335°C).
The nonthermal effects of microwave fields reduce the total process time to just one hour, making the method both environmentally friendly and efficient. The resulting photocured VTLF exhibits comprehensive properties of conventional fluororubbers, excellent chemical stability, and unique light transmittance (94.21%).
For the maritime sector, this research opens up new avenues for designing and synthesizing novel fluoropolymers with diverse applications. The upcycled VTLF can be used in various maritime applications, such as coatings for ship hulls, seals, and gaskets, where high performance and durability are crucial. The method’s efficiency and environmental friendliness align with the maritime industry’s growing focus on sustainability and circular economy principles.
Donghan Li, the lead author, emphasizes the significance of this research: “This study proposes a green, straightforward upcycling strategy within the circular economy framework to mitigate environmental issues associated with rubber’s covalent crosslinking.” The method’s ability to transform waste into high-value materials not only addresses environmental concerns but also presents commercial opportunities for the maritime sector.
The research highlights the potential for the maritime industry to adopt innovative, sustainable materials that enhance performance and reduce environmental impact. As the sector continues to evolve, such advancements will be crucial in meeting the demands for durability, efficiency, and sustainability.