Chen Deming, Xu Chunyan, Ye Haoran, Shi Yang, Sheng Yequan, Ge Shengbo, Zhang Minglong, Wang Hui
College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China.
Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China.
Polymers (Basel). 2022 Sep 2;14(17):3636. doi: 10.3390/polym14173636.
One-step thermoforming represents an effective approach to preparing glue-free biocomposites. This study aimed to produce glue-free biocomposites with high-temperature resistance and mechanical properties using phosphoric acid pretreatments combined with thermoforming. Due to the hot-moulding process, the cell wall was destroyed, which allowed the fibres to adhere closely together. Most hemicelluloses were hydrolysed through pretreatment with phosphoric acid, and the contact area between the cellulose and lignin was significantly increased. The biocomposites prepared by ball milling demonstrated remarkable flexural strength (49.03 MPa) and tensile strength (148.23 MPa). Moreover, they had excellent thermal stability, with the maximum temperature for pyrolysis rate at 374 °C, which was much higher than that of poplar (337 °C). In addition, the material released no formaldehyde during the preparation process, which is in line with the concept of green production.
一步热成型是制备无胶生物复合材料的有效方法。本研究旨在通过磷酸预处理结合热成型来生产具有耐高温性和机械性能的无胶生物复合材料。由于热成型过程，细胞壁被破坏，使得纤维能够紧密粘附在一起。大多数半纤维素通过磷酸预处理被水解，纤维素与木质素之间的接触面积显著增加。通过球磨制备的生物复合材料表现出显著的抗弯强度（49.03兆帕）和抗拉强度（148.23兆帕）。此外，它们具有出色的热稳定性，热解速率的最高温度为374℃，远高于杨树的热解温度（337℃）。此外，该材料在制备过程中不释放甲醛，符合绿色生产的理念。
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