采用溶液浸渍-热压技术对溶剂处理的纤维素纳米纤维预制件进行力学表征。
Mechanical Characterization on Solvent Treated Cellulose Nanofiber Preforms Using Solution Dipping-Hot Press Technique.
作者信息
Thirunavukarasu Devendran, Shimamura Yoshinobu, Tohgo Keiichiro, Fujii Tomoyuki
机构信息
Department of Environment and Energy System, Graduate School of Science and Technology, Shizuoka University, 3-5-1 Johoku, Naka-ku, Hamamatsu, Shizuoka 432-8561, Japan.
Department of Mechanical Engineering, Shizuoka University, 3-5-1 Johoku, Naka-ku, Hamamatsu, Shizuoka 432-8561, Japan.
出版信息
Nanomaterials (Basel). 2020 Apr 29;10(5):841. doi: 10.3390/nano10050841.
Nanocomposites films were prepared by impregnating the solvent treated cellulose nanofiber (SCNF) preforms with epoxy resin using a solution dipping-hot press technique. We investigated the effect of SCNF preforms porosity on the amount of impregnated resin and tensile properties of the corresponding nanocomposites films. The porosity of the CNF preforms was successfully controlled using the solvent exchange with varying CNF concentration. The impregnated resin amount increased as the SCNF preforms porosity increased, respectively. Resulting nanocomposite films showed higher mechanical properties than that of the SCNF preforms. The best mechanical properties of composites were found with the combination of 1 wt % SCNF preform and low viscosity epoxy, exhibiting tensile strength and Young's modulus of 77 MPa and 4.8 GPa, respectively. The composite also showed high fiber volume fraction of more than 60%.
采用溶液浸渍-热压技术，通过用环氧树脂浸渍经溶剂处理的纤维素纳米纤维（SCNF）预制件来制备纳米复合薄膜。我们研究了SCNF预制件孔隙率对浸渍树脂量以及相应纳米复合薄膜拉伸性能的影响。通过与不同浓度的CNF进行溶剂交换，成功控制了CNF预制件的孔隙率。浸渍树脂量分别随着SCNF预制件孔隙率的增加而增加。所得纳米复合薄膜显示出比SCNF预制件更高的机械性能。在1 wt%的SCNF预制件与低粘度环氧树脂组合时，复合材料具有最佳机械性能，其拉伸强度和杨氏模量分别为77 MPa和4.8 GPa。该复合材料还显示出超过60%的高纤维体积分数。
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