Biobased Flame Retardant Epoxy Resins and Composites

在石油储量日益减少和环境问题日益突出的情况下，开发高性能的可再生生物基环氧树脂并提出作为新的工程材料迫在眉睫。为了获得高性能的阻燃生物基环氧树脂，将设计、合成和研究新型含磷生物基环氧树脂。旨在使生物基环氧树脂和天然纤维增强的环氧树脂生物复合材料具有固有的阻燃性能。目标是获得优异的耐热性、阻燃性和机械性能。此外，还讨论了这些材料作为双(4-羟基苯基)-2，2-丙烷等含双酚A排泄物的替代品或部分替代品。我们探索具有刚性化学结构的丁香酚、白藜芦醇、咖啡酸等生物基料，并将它们与磷化合物反应，得到阻燃生物热固性材料。此外，我们还选择了苎麻纤维增强复合材料。对天然纤维进行改性，以改善其相容性和防火性能；将采用简单的处理以及逐层涂层。通过全面和多方法的研究，可以了解环氧树脂和复合材料在不同火灾情况下的燃烧性能和阻燃性能，从而了解它们的热解、燃烧和燃烧行为。将确定作用模式，并尽可能量化；通过系统比较不同的材料，将研究结构-性能关系。确定了最有希望的方法。除了科学目标之外，这个项目还至关重要地刺激了相关研究人员的流动性。在工作组中逗留5个月的嘉宾将使科学项目员工获得关于先进生物基环氧树脂的合成和制备、生物复合材料的制备以及对其分解、易燃和燃烧行为的研究的全面知识，从而促进国际科学教育。

Exploring renewable bio-based epoxy resin with high-performance and proposing them as new engineering materials is urgent because of the diminishing petroleum oil reserves and environmental concerns. In order to obtain fire-retardant bio-based epoxy resins with high performance, novel bio-based epoxides contain phosphorous will be designed, synthesized and investigated. It is the aim to endow the bio-based epoxide and natural fibre reinforced epoxide biocomposites with inherent flame retardancy. The goal is to obtain excellent heat-resistant, flame-retardant, and mechanical properties. Further, these materials are discussed as alternatives or partly replacement of bisphenol A containing educts such as bis(4-hydroxyphenylene)-2,2-propane. We explore raw bio-base materials with rigid chemical structure such as eugenol, resveratrol, caffeic acid and react them with phosphorus compounds to obtain flame retardant bio-thermosetting materials. Further, we go for ramie fibre reinforced composites. The natural fibres are modified to improve their compatibility as well as their fire performance; simple treatment will be applied as well as a layer-by-layer coating. Comprehensive and multimethodical investigation will yield an understanding of the pyrolysis, flammability, and fire behaviour of the epoxy resins and composites with respect to the fire performance and the flame retardancy achieved in different fire scenarios. The modes of action will be identified and as far as possible quantified; by the means of comparing systematically varied materials, the structure-property relationships will be investigated. The most promising approaches are identified. Apart from the scientific objectives this project crucially stimulates the mobility of the involved researchers. Five months guest stays in the working groups will enable the scientific project employee to get a comprehensive knowledge on synthesis and preparation of advanced bio-based epoxy resins, preparation of biocomposites, and investigating their decomposition, flammability, and fire behaviour, and thus will promote the international scientific education as well.