writer：Jifei Ge, Fushi Li, Yunbao Gao, Jing Jin, Wei Jiang
keywords：玉米秸秆, 高性能, 化学处理, 热压, 聚碳酸丙烯酯
source：期刊
specific source：Cellulose, 2021, 28(18), 11381-11395
Issue time：2021年

摘要：本文基于天然玉米秸秆，通过化学处理结合热压制备了超高强度和高模量致密化玉米秸秆，以满足工业需求并促进玉米秸秆利用。ATR-FTIR、XRD、TGA和化学组成分析表明，化学处理去除了部分木质素和半纤维素，但尽可能保留了纤维素。SEM表面形貌表明，热压部分消除了材料缺陷并增加了单位体积负载纤维数量，构建了更致密的微观结构。利用该方法，致密化玉米秸秆的拉伸强度（598.6 MPa）、断裂伸长率（6.2%）、杨氏模量（16.6 GPa）和比强度（434 MPa·g-1·cm3）相比天然玉米秸秆大幅提高。将高性能致密化玉米秸秆切碎纤维与可生物降解聚碳酸丙烯酯（PPC）成功复合，在汽车、建筑、家具甚至飞机领域具有巨大应用前景。

Abstract：In this work, ultrahigh strength and high modulus densified maize straws were fabricated based on natural maize straws by the chemical treatment combined with hot pressing to satisfy the needs of industry and promote the utilization of maize straws. The analysis of the ATR-FTIR, XRD, TGA, and chemical composition characterization indicated that chemical treatment removed part of lignin and hemicellulose but kept cellulose as much as possible. Surface morphologies from SEM images suggested that the hot pressing partly eliminated the defects of the material and increased the amount of loading fibers per unit volume, constructing materials with more densified microstructures. Through utilizing this method, the tensile strength (598.6 MPa), elongation at break (6.2%), Young''s modulus (16.6 GPa), and specific strength (434 MPa·g-1·cm3) of the densified maize straws were greatly enhanced compared with the natural maize straws. Therefore, the high-performance densified maize straws with chopped fibers were successfully composited with the biodegradable poly(propylene carbonate), predicting a huge application prospect in automobile, construction, furniture, and even airplane fields.

论文链接：https://doi.org/10.1007/s10570-021-04264-0