Synthesis of a fully bio-based self-catalyzed hyperbranched waterborne polyurethane as a sizing agent for enhancing the interfacial properties of CF/PA6 composites†
Shengtao Dai , Fei Yan , Siyu Zhang , Jiaming Guo , Lin Zhang , Yu Liu , Liu Liu , Yuhui Ao
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引用次数: 0
Abstract
The scientific community has dedicated the past decade to integrate its resources in pursuit of “sustainable development”, aiming to pave the way for a perpetually eco-friendly and sustainable future. As a part of this collective effort, traditional petroleum-based polyurethanes have been progressively substituted by environmentally friendly alternatives. In this study, a conservation-minded approach was implemented using a green solvent, γ-valerolactone, along with fully biogenic-derived reagents: epoxidized soybean oil, tartaric acid and l-lysine diisocyanate to develop a hyperbranched waterborne polyurethane (HWPU) sizing agent. Meanwhile, tertiary amine was integrated into the polyol structure, facilitating the self-catalytic process en route to polyurethane, thereby eliminating the need for highly toxic catalysts. The meticulously developed fully bio-based sizing agent notably enhanced the interfacial properties between the carbon fiber (CF) and nylon 6 resin matrix. Comprehensive mechanical property evaluations of the modified composites revealed 49.4% and 49.6% improvements in flexural strength and interlaminar shear strength, respectively, compared with pristine CF composites. Additionally, interfacial shear strength tests demonstrated a substantial increase of 66.1%. This work presents an attractive avenue for the prospective industrial production and application of a green HWPU sizing agent.
期刊介绍：
Green Chemistry is a journal that provides a unique forum for the publication of innovative research on the development of alternative green and sustainable technologies. The scope of Green Chemistry is based on the definition proposed by Anastas and Warner (Green Chemistry: Theory and Practice, P T Anastas and J C Warner, Oxford University Press, Oxford, 1998), which defines green chemistry as the utilisation of a set of principles that reduces or eliminates the use or generation of hazardous substances in the design, manufacture and application of chemical products. Green Chemistry aims to reduce the environmental impact of the chemical enterprise by developing a technology base that is inherently non-toxic to living things and the environment. The journal welcomes submissions on all aspects of research relating to this endeavor and publishes original and significant cutting-edge research that is likely to be of wide general appeal. For a work to be published, it must present a significant advance in green chemistry, including a comparison with existing methods and a demonstration of advantages over those methods.
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