摘要：近年来，玉米秸秆的工业应用兴趣日益增加。本文基于废弃玉米秸秆，通过化学处理结合搅拌制备了化学处理纤维（CTF）。实验结果表明，化学处理后CTF中部分木质素被去除，导致表面形貌光滑、热稳定性更好、结晶度更高。将CTF与聚丙烯（PP）复合，加入PP-g-MAH和硅烷偶联剂（SCA）后，CTF与PP的相容性提高，PP复合材料力学性能也得到改善。PP/CTF/PP-g-MAH/SCA（50/50/6/0.95）复合材料的拉伸强度（54.9±5.4 MPa）、杨氏模量（1950±246 MPa）、比强度（49.4±3.9 MPa·g-1·cm3）和冲击强度（3.6±0.3 kJ/m2）均优于未加改性剂的复合材料。

Abstract：In recent years, there has been an increasing industrial interest in maize straws. In this work, chemical-treated fibers (CTF) were fabricated based on wasted maize straws by chemical treatment combined with stirring. The experimental results suggest that a part of lignin in CTF was removed after chemical treatment, which resulted in the smooth surface morphology, better thermal stability, and even higher degree of crystallinity of CTF. Furthermore, the CTF were used to composite with polypropylene (PP). With the addition of PP-g-MAH and silane coupling agent (SCA), the compatibility between CTF and PP was improved and thus the mechanical performance of PP composites was also improved. At the same time, the tensile strength (54.9±5.4 MPa), Young''s modulus (1950±246 MPa), specific strength (49.4±3.9 MPa·g-1·cm3) and impact strength (3.6±0.3 kJ/m2) of the PP/CTF/PP-g-MAH/SCA (50/50/6/0.95) composite were improved compared with the composite without modifiers.

论文链接：https://doi.org/10.1002/app.55202