Takayama Tetsuo, Kobayashi Shunsuke, Yuasa Yuuki, Jiang Quan
Graduate School of Organic Materials Science, Yamagata University, Yonezawa 992-8510, Japan.
Polymers (Basel). 2024 Apr 16;16(8):1110. doi: 10.3390/polym16081110.
The mechanical recycling of discarded plastic products as resources for environmental preservation has recently gained research attention. In this context, it is necessary to use waste materials for fiber-reinforced thermoplastics (FRTP). Glass and carbon fibers are often damaged by shear and compression during melt-forming processes. To achieve a sustainable society, it is necessary for thermal recycling to produce minimal to no residue and for mechanical recycling to maintain the length of fibers used in FRTP to preserve their performance as a reinforcing agent. Aramid fibers (AFs) do not shorten during the melt-molding process, and their composites have excellent impact strength. On the other hand, plastics reinforced with glass or carbon fibers are reported to have a superior strength and modulus of elasticity compared to aramid fibers. This study investigates the dispersion of a carbon nanofiber (CNF), a whisker, as the third component in aramid-fiber-reinforced polypropylene (PP/AF). The results and discussion sections demonstrate how the dispersion of CNF in PP/AF can enhance the mechanical properties of injection-molded products without compromising their impact resistance. The proposed composition will have excellent material recyclability and initial mechanical properties compared to glass-fiber-reinforced thermoplastics.
将废弃塑料制品作为环境保护资源进行机械回收最近受到了研究关注。在这种背景下，有必要将废料用于纤维增强热塑性塑料（FRTP）。玻璃纤维和碳纤维在熔融成型过程中常因剪切和压缩而受损。为实现可持续社会，热回收产生的残渣应最少甚至无残渣，机械回收应保持FRTP中所用纤维的长度以维持其作为增强剂的性能。芳纶纤维（AFs）在熔融成型过程中不会缩短，其复合材料具有优异的冲击强度。另一方面，据报道，与芳纶纤维相比，玻璃纤维或碳纤维增强的塑料具有更高的强度和弹性模量。本研究考察了作为第三组分的碳纳米纤维（CNF）晶须在芳纶纤维增强聚丙烯（PP/AF）中的分散情况。结果与讨论部分展示了CNF在PP/AF中的分散如何在不损害注塑产品抗冲击性的情况下提高其机械性能。与玻璃纤维增强热塑性塑料相比，所提出的组合物将具有优异的材料可回收性和初始机械性能。
