Sang Lin, Zhao Mingyuan, Liang Qiushi, Wei Zhiyong
School of Automotive Engineering, State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116024, China.
Department of Polymer Science and Materials, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China.
Polymers (Basel). 2017 Aug 9;9(8):351. doi: 10.3390/polym9080351.
In this work, an economical modifier silane agent-KH550-was used for surface treatment of basalt fiber. Then, a biodegradable poly(butylene succinate) (PBS)/modified basalt fiber (MBF) biocomposite was successfully developed. The effects of silane treatment and fiber mass content on crystalline structure, isothermal crystallization process and mechanical performance of composites were evaluated. The interfacial crystallization of PBS on the surface of MBF was investigated by using a polarized optical microscope (POM). The transcrystalline (TC) structure could be clearly observed and it grew perpendicular to the surface of MBF, which boosted the nucleation ability on PBS crystallization and the strong interfacial interaction between PBS and silane-treated basalt fiber. Under isothermal crystallization kinetics, the incorporation of basalt fiber enhanced the crystallization rate and reduced the crystallization half-time values of composites compared with that of neat PBS due to a heterogeneous nucleation effect. Furthermore, tensile results confirmed that the presence of MBF could greatly improve the tensile strength and modulus. The predicted interfacial shear strength (IFSS) suggested that an enhancement of interfacial bonding could be realized via interfacial crystallization, which was also verified by SEM images. The PBS/MBF biocomposites can be applied in many fields as a low-cost, lightweight, and biodegradable composite material.
在本工作中，使用一种经济的改性剂硅烷试剂——KH550对玄武岩纤维进行表面处理。然后，成功制备了一种可生物降解的聚丁二酸丁二醇酯（PBS）/改性玄武岩纤维（MBF）生物复合材料。评估了硅烷处理和纤维质量含量对复合材料的晶体结构、等温结晶过程及力学性能的影响。利用偏光显微镜（POM）研究了PBS在MBF表面的界面结晶情况。可以清晰观察到横穿晶（TC）结构，其垂直于MBF表面生长，这提高了PBS结晶的成核能力以及PBS与硅烷处理的玄武岩纤维之间的强界面相互作用。在等温结晶动力学条件下，由于异相成核作用，与纯PBS相比，玄武岩纤维的加入提高了复合材料的结晶速率并降低了结晶半衰期值。此外，拉伸试验结果证实，MBF的存在可显著提高拉伸强度和模量。预测的界面剪切强度（IFSS）表明，可通过界面结晶实现界面结合的增强，扫描电子显微镜（SEM）图像也证实了这一点。PBS/MBF生物复合材料作为一种低成本、轻质且可生物降解的复合材料可应用于许多领域。
