Shen Yuxi, Gallet-Pandellé Alia, Kurita Hiroki, Narita Fumio
Department of Materials Processing, Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan.
Department of Frontier Sciences for Advanced Environment, Graduate School of Environmental Studies, Tohoku University, Sendai 980-8579, Japan.
Polymers (Basel). 2021 Nov 15;13(22):3944. doi: 10.3390/polym13223944.
Cellulose acetate (CA) is widely used as an alternative to conventional plastics because of the minor environmental impact of its decomposition cycle. This study synthesized five-layer environmentally friendly composites from CA bioplastic and basalt fibers (BFs) to produce a high-strength marine-biodegradable polymer. Maleic anhydride-grafted polypropylene (PP-g-MAH) was mixed with CA as a surface-active agent (SAA) to understand the effect of surface treatment on the mechanical properties of the composite. Tensile tests and scanning electron microscopy were conducted to observe the fracture surfaces. The ultimate tensile strength (UTS) of the BF/CA composite increased by approximately a factor of 4 after adding 11 vol.% unidirectional BF. When the SAA was added, the UTS of the composite with 11 vol.% BF was multiplied by a factor of about 7, which indicates that the surface treatment has a significant positive effect on the mechanical properties. However, the improvement is not apparent when the added BFs are in a plain weave with a vertical orientation. A photodecomposition experiment was then conducted by adding TiO. Observing the UTS changes of the CA and BF/CA composites, the effect of the photocatalyst on the decomposition of the materials was explored.
醋酸纤维素（CA）因其分解周期对环境影响较小，被广泛用作传统塑料的替代品。本研究由CA生物塑料和玄武岩纤维（BFs）合成了五层环保复合材料，以生产一种高强度的海洋生物可降解聚合物。将马来酸酐接枝聚丙烯（PP-g-MAH）与CA混合作为表面活性剂（SAA），以了解表面处理对复合材料力学性能的影响。进行了拉伸试验和扫描电子显微镜观察断裂表面。添加11体积%的单向BF后，BF/CA复合材料的极限拉伸强度（UTS）提高了约4倍。当添加SAA时，含11体积%BF的复合材料的UTS乘以约7倍，这表明表面处理对力学性能有显著的积极影响。然而，当添加的BF为垂直取向的平纹编织时，这种改善并不明显。然后通过添加TiO₂进行光分解实验。观察CA和BF/CA复合材料的UTS变化，探讨了光催化剂对材料分解的影响。
