Flemish Institute for Technological Research-VITO, Separation & Conversion Technology, Boeretang 200, 2400 Mol, Belgium.
Biorizon, Auvergnedijk 2, 4612 PZ Bergen op Zoom, The Netherlands.
Molecules. 2020 Mar 5;25(5):1158. doi: 10.3390/molecules25051158.
The use of renewable resources for plastic production is an imperious need for the reduction of the carbon footprint and the transition towards a circular economy. With that goal in mind, fully biobased epoxy resins have been designed and prepared by combining epoxidized linseed oil, lignin, and a biobased diamine derived from fatty acid dimers. The aromatic structures in lignin provide hardness and strength to an otherwise flexible and breakable epoxy resin. The curing of the system was investigated by infrared spectroscopy and differential scanning calorimetry (DSC). The influence of the different components on the thermo-mechanical properties of the epoxy resins was analyzed by DSC, thermal gravimetric analysis (TGA), and tensile tests. As the content of lignin in the resin increases, so does the glass transition, the Young's modulus, and the onset of thermal degradation. This correlation is non-linear, and the higher the percentage of lignin, the more pronounced the effect. All the components of the epoxy resin being commodity chemicals, the present system provides a realistic opportunity for the preparation of fully biorenewable resins at an industrial scale.
可再生资源在塑料生产中的应用是减少碳足迹和向循环经济转型的迫切需求。考虑到这一目标，通过结合环氧化亚麻籽油、木质素和一种源自脂肪酸二聚体的生物基二胺，设计并制备了全生物基环氧树脂。木质素中的芳香结构为原本柔韧易碎的环氧树脂提供了硬度和强度。通过红外光谱和差示扫描量热法（DSC）研究了该体系的固化过程。通过 DSC、热重分析（TGA）和拉伸试验分析了不同成分对环氧树脂热机械性能的影响。随着树脂中木质素含量的增加，玻璃化转变温度、杨氏模量和热降解起始温度都会升高。这种相关性是非线性的，木质素的百分比越高，效果越明显。由于环氧树脂的所有成分都是商品化学品，因此该体系为在工业规模上制备全生物可再生树脂提供了现实机会。
