Hidalgo Pamela, Salgado Luis, Ibacache Nayadeth, Hunter Renato
Department of Industrial Processes, Faculty of Engineering, Universidad Católica de Temuco, Rudecindo Ortega 02950, Temuco 4780000, Chile.
Department of Mechanical Engineering, Universidad de La Frontera, Casilla 54-D, Temuco 4811230, Chile.
Polymers (Basel). 2023 Apr 15;15(8):1895. doi: 10.3390/polym15081895.
In this study, we evaluated the use of bio-oil and biochar on epoxy resin. Bio-oil and biochar were obtained from the pyrolysis of wheat straw and hazelnut hull biomass. A range of bio-oil and biochar proportions on the epoxy resin properties and the effect of their substitution were investigated. TGA curves showed improved thermal stability for degradation temperature at the 5% (T5%), 10% (T10%), and 50% (T50%) weight losses on bioepoxy blends with the incorporation of bio-oil and biochar with respect to neat resin. However, decreases in the maximum mass loss rate temperature (T) and the onset of thermal degradation (T) were obtained. Raman characterization showed that the degree of reticulation with the addition of bio-oil and biochar does not significantly affect chemical curing. The mechanical properties were improved when bio-oil and biochar were incorporated into the epoxy resin. All bio-based epoxy blends showed a large increase in Young's modulus and tensile strength with respect to neat resin. Young's modulus was approximately 1955.90 to 3982.05 MPa, and the tensile strength was between 8.73 and 13.58 MPa for bio-based blends of wheat straw. Instead, in bio-based blends of hazelnut hulls, Young´s modulus was 3060.02 to 3957.84 MPa, and tensile strength was 4.11 to 18.11 Mpa.
在本研究中，我们评估了生物油和生物炭在环氧树脂中的应用。生物油和生物炭是通过小麦秸秆和榛子壳生物质的热解获得的。研究了一系列生物油和生物炭比例对环氧树脂性能的影响及其替代效果。热重分析（TGA）曲线表明，相对于纯树脂，在生物环氧树脂共混物中加入生物油和生物炭后，在5%（T5%）、10%（T10%）和50%（T50%）失重时的降解温度下，热稳定性得到了改善。然而，最大质量损失率温度（T）和热降解起始温度（T）有所降低。拉曼表征表明，添加生物油和生物炭后的网状化程度对化学固化没有显著影响。当将生物油和生物炭加入环氧树脂中时，机械性能得到了改善。所有生物基环氧树脂共混物相对于纯树脂而言，杨氏模量和拉伸强度都有大幅提高。对于小麦秸秆生物基共混物，杨氏模量约为1955.90至3982.05MPa，拉伸强度在8.73至13.58MPa之间。相反，对于榛子壳生物基共混物，杨氏模量为3060.02至3957.84MPa，拉伸强度为4.11至18.11MPa。
