Abstract
Biodegradable polypropylene carbonate (PPC) has garnered significant attention for its commendable biodegradability and its role in mitigating the greenhouse effect. However, the inherent drawback of PPC, its low glass transition temperature (Tg), severely restricts its widespread use, especially at room temperature. In this study, we explore the utilization of MXene-OH/CNTs-OH (CM) hybrids, which encompass hydroxylated one-dimensional carbon nanotubes (CNTs-OH) and the two-dimensional layered structure of Ti3C2 (MXene-OH), to enhance the properties of PPC through hydrogen bonding complexation. By adjusting the content of nanofillers, the resulting PPC/CM composites demonstrate improved Tg, mechanical strength, and exceptional capability in supercritical foaming. Both experimental and theoretical analyses confirm that the CM crosslinking mechanism significantly elevates the Tg of the composite to 37.3 °C, while also enhancing tensile strength by 23.7% and antibacterial activity by 99.6%. This study presents a straightforward and practical method for developing functionalized, sustainable polymer foams with enhanced characteristics, poised for a diverse range of applications.
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