Bolcu Dumitru, Stănescu Marius Marinel
Department of Mechanics, University of Craiova, 165 Calea Bucureşti, 200620 Craiova, Romania.
Polymers (Basel). 2020 Jul 24;12(8):1649. doi: 10.3390/polym12081649.
The need to protect the environment has generated, in the past decade, a competition at the producers' level to use, as much as possible, natural materials, which are biodegradable and compostable. This trend and the composite materials have undergone a spectacular development of the natural components. Starting from these tendencies we have made and studied from the point of view of mechanical and chemical properties composite materials with three types of hybrid matrix based on the Dammar natural hybrid resin and two types of reinforcers made of flax fabric. We have researched the mechanical properties of these composite materials based on their tensile strength and vibration behavior, respectively. We have determined the characteristic curves, elasticity modulus, tensile strength, elongation at break, specific frequency and damping factor. Using SEM (Scanning Electron Microscopy) analysis we have obtained images of the breaking area for each sample that underwent a tensile test and, by applying FTIR (Fourier Transform Infrared Spectroscopy) and EDS (Energy Dispersive Spectroscopy) analyzes, we have determined the spectrum bands and the chemical composition diagram of the samples taken from the hybrid resins used as a matrix for the composite materials under study. Based on the results, we have suggested that these composite materials could be used in different fields of activity.
在过去十年中，对环境保护的需求促使生产商层面展开了一场竞争，尽可能多地使用可生物降解和可堆肥的天然材料。这一趋势以及复合材料使得天然成分得到了显著发展。基于这些趋势，我们制备了以达玛天然混合树脂为基础的三种混合基体以及由亚麻织物制成的两种增强材料的复合材料，并从机械性能和化学性能的角度进行了研究。我们分别基于拉伸强度和振动行为研究了这些复合材料的机械性能。我们确定了特征曲线、弹性模量、拉伸强度、断裂伸长率、固有频率和阻尼因子。通过扫描电子显微镜（SEM）分析，我们获得了每个进行拉伸试验的样品断裂区域的图像，并且通过应用傅里叶变换红外光谱（FTIR）和能谱分析（EDS），我们确定了用作所研究复合材料基体的混合树脂样品的光谱带和化学成分图。基于这些结果，我们建议这些复合材料可用于不同的活动领域。
