Fujian Key Laboratory of Novel Functional Textile Fibers and Materials, Minjiang University, Fuzhou, 350108, China.
Fujian Key Laboratory of Novel Functional Textile Fibers and Materials, Minjiang University, Fuzhou, 350108, China.
Carbohydr Polym. 2021 Feb 15;254:117310. doi: 10.1016/j.carbpol.2020.117310. Epub 2020 Nov 4.
Aminated cellulose nanofibers (A-CNF) with high thermostability (>350 ℃), high crystallinity (81.25 %), and high dispersion stability were extracted from "biological grinding" biomass through one-pot microwave-hydrothermal synthesis. Worm-eaten wood powder (WWP) as the product of "biological grinding" by borers is a desirable lignocellulose for fabricating A-CNF in a green and cost-effective way since it is a well-milled fine powder with dimension of dozens of microns, which can be used directly, saving energy and labor. Generated A-CNF proved to be an excellent reinforcing and curing agent for constructing high performance epoxy nanocomposites. The nanocomposites exhibited a thermal conductivity enhancement of about 120 %, coefficient of thermal expansion reduction of 78 %, and Young's modulus increase of 108 % at a low A-CNF loading of 1 wt.%, demonstrating their remarkable reinforcing potential and effective stress transfer behavior. The process proposed herein might help to bridge a closed-loop carbon cycle in the whole production-utilization of biomass.
通过一锅微波水热合成法，从“生物研磨”生物质中提取出具有高热稳定性（>350℃）、高结晶度（81.25%）和高分散稳定性的氨基化纤维素纳米纤维（A-CNF）。虫蛀木粉（WWP）是“生物研磨”的产物，是一种理想的木质纤维素，可通过绿色且经济高效的方式来制造 A-CNF，因为它是一种经过精细研磨的几十微米级别的细粉，可以直接使用，节省能源和劳动力。生成的 A-CNF 被证明是构建高性能环氧树脂纳米复合材料的优秀增强和固化剂。在 1wt.%的低 A-CNF 负载下，纳米复合材料表现出约 120%的热导率增强、78%的热膨胀系数降低和 108%的杨氏模量增加，显示出其显著的增强潜力和有效的应力传递行为。本文提出的工艺可能有助于在生物质的整个生产利用过程中形成一个闭环碳循环。
