Melo de Lima L R, Neves S, Pinho S, Coelho C, Almeida M F, Lopes M A, Fonseca C
FEUP, Department of Mechanical Engineering, University of Porto, Rua Dr. Roberto Frias, s/n, 4200-465 Porto, Portugal.
LEPABE, FEUP, Department of Mechanical Engineering, University of Porto, Rua Dr. Roberto Frias, s/n, 4200-465 Porto, Portugal.
Polymers (Basel). 2025 Apr 22;17(9):1136. doi: 10.3390/polym17091136.
Among the proposed leather recycling options, the incorporation of leather waste in rubber has been the subject of multiple studies, where the effects of leather content on the mechanical and rheological properties of the composites are usually studied. However, the effects of leather size have never been addressed in a systematic way. The reasons to study this parameter are twofold: it affects the physicochemical properties and processing conditions of the composites, and leather grinding is a costly and time-consuming process. In this work, leather waste (LW) with particle sizes ranging from ≤0.5 mm to ≤3 mm was incorporated in styrene-butadiene rubber (SBR) in contents of up to 50 phr. It was concluded that the composites with finer leather sizes exhibited a more uniform particles dispersion, and tensile strength was not significantly affected by the presence of LW, especially for the finer granulometries. However, there is a remarkable increase in the stiffness with the increase in leather content, particularly with the finer particles. The abrasion increased with the incorporation of leather across all particle sizes, especially for the ≤0.5 mm leather particles. The thermal stability of the composites was not affected by either the particle size or the amount of LW, except for high contents.
在提出的皮革回收方案中，将皮革废料掺入橡胶已成为多项研究的主题，这些研究通常探讨皮革含量对复合材料机械性能和流变性能的影响。然而，皮革尺寸的影响从未得到系统研究。研究这一参数的原因有两个：它会影响复合材料的物理化学性质和加工条件，而且皮革研磨是一个成本高且耗时的过程。在这项工作中，将粒径范围从≤0.5毫米至≤3毫米的皮革废料（LW）以高达50份/100份橡胶（phr）的含量掺入丁苯橡胶（SBR）中。得出的结论是，皮革尺寸更细的复合材料表现出更均匀的颗粒分散，并且拉伸强度不受LW存在的显著影响，特别是对于更细的粒度。然而，随着皮革含量的增加，尤其是对于更细的颗粒，刚度有显著增加。在所有粒径中，随着皮革的掺入磨损增加，特别是对于≤0.5毫米的皮革颗粒。除了高含量外，复合材料的热稳定性不受粒径或LW含量的影响。
