Khalili Pooria, Skrifvars Mikael, Dhakal Hom Nath, Dashatan Saeid Hosseinpour, Danielsson Mikael, Gràcia Alèxia Feiner
Swedish Centre for Resource Recovery, Faculty of Textiles, Engineering and Business, University of Borås, 510 90 Borås, Sweden.
Advanced Polymers and Composites (APC), School of Mechanical Design and Engineering, University of Portsmouth, Portsmouth PO1 3DJ, UK.
Polymers (Basel). 2023 Sep 19;15(18):3815. doi: 10.3390/polym15183815.
In this paper, sandwich composites were produced by compression moulding techniques, and they consisted of regenerated cellulose fabric (rayon) and bio-based polypropylene (PP) to form facings, while virgin and recycled polyamide (PA) textiles were used as core materials. To compare the mechanical performance between sandwich composites and typical composite designs, a control composite was produced to deliver the same weight and fiber mass fraction from rayon and PP. To evaluate the influence of recycled textile on the mechanical properties of the composites, a series of flexural, low velocity impact (LVI) and tensile tests were performed. It was found that the incorporation of thicker PA textile enhanced the bending stiffness by two times and the peak flexural force by 70% as compared to those of control. Substitution of a layer of recycled textile for two layers of rayon provided a good level of impact energy absorption capacity (28 J) and maximum force (4893-5229 N). The tensile strength of the four sandwich composites was reported to be in the range of 34.20 MPa and 46.80 MPa. This value was 91.90 for the control composite. The 2D cross-section slices of the composite specimens did not show any evidence of fiber tow debonding, fiber bundle splitting, or delamination.
在本文中，夹层复合材料通过模压成型技术制备而成，其由再生纤维素织物（人造丝）和生物基聚丙烯（PP）组成面层，同时使用原生和回收聚酰胺（PA）织物作为芯材。为了比较夹层复合材料与典型复合材料设计之间的力学性能，制备了一种对照复合材料，使其具有与人造丝和PP相同的重量和纤维质量分数。为了评估回收织物对复合材料力学性能的影响，进行了一系列弯曲、低速冲击（LVI）和拉伸试验。结果发现，与对照相比，加入较厚的PA织物使弯曲刚度提高了两倍，峰值弯曲力提高了70%。用一层回收织物替代两层人造丝可提供良好水平的冲击能量吸收能力（约28 J）和最大力（约4893 - 5229 N）。据报道，四种夹层复合材料的拉伸强度在34.20 MPa至46.80 MPa范围内。对照复合材料的该值为91.90。复合材料试样的二维横截面切片未显示出任何纤维束脱粘、纤维束分裂或分层的迹象。
