PDF(Pubmed)
Abstract：
Cork composites are byproducts from wine stopper production, resulting from the agglomeration of cork granules with a thermoset resin. The resulting compound is a versatile and durable material with numerous industrial applications. Due to its unique properties, such as low-density, high-strength, excellent energy absorption, and good thermal and acoustic insulators, cork composites find room for application in demanding industries such as automotive, construction, and aerospace. However, agglomerated cork typically has a polyurethane matrix derived from petrochemical sources. This study focuses on developing eco-friendly porous polyurethane biocomposites manufactured with the used cooking oil polyol modified with cork. Since cork and polyurethane foam are typically used for impact shock absorption, the manufactured samples were subjected to impact loading. The assessment of crashworthiness is performed through 100 J impact tests. A finite element numerical model was developed to simulate the compression of these new composites under impact, and the model validation was performed. The highest specific absorbed energy was obtained for petrochemical polyol composites with the 3% addition of natural or modified cork. The research conducted in this study showcased the feasibility of substituting certain petrochemical components used for the synthesis of the polyurethane matrix with ecological waste vegetable oil components.
摘要：
软木复合材料是酒塞生产的副产品，由于软木颗粒与热固性树脂的团聚而产生。所得化合物是具有许多工业应用的通用且耐用的材料。由于其独特的性质，比如低密度，高强度,出色的能量吸收，和良好的热和声绝缘体，软木复合材料在汽车等要求苛刻的行业中找到应用的空间，建筑,和航空航天。然而,附聚的软木通常具有衍生自石化来源的聚氨酯基质。本研究的重点是开发使用软木改性的食用油多元醇制造的生态友好型多孔聚氨酯生物复合材料。由于软木和聚氨酯泡沫通常用于冲击减震，制造的样品承受冲击载荷。耐撞性的评估是通过100J冲击试验进行的。开发了有限元数值模型来模拟这些新复合材料在冲击下的压缩，并进行了模型验证。添加3％的天然或改性软木时，石化多元醇复合材料的比吸收能量最高。在这项研究中进行的研究表明了用生态废植物油成分代替用于合成聚氨酯基质的某些石化成分的可行性。
