Park Ji-Soo, Park Chan-Woo, Han Song-Yi, Lee Eun-Ah, Cindradewi Azelia Wulan, Kim Jeong-Ki, Kwon Gu-Joong, Seo Young-Ho, Yoo Won-Jae, Gwon Jaeg-Young, Lee Seung-Hwan
Department of Forest Biomaterials Engineering, College of Forest and Environmental Sciences, Kangwon National University, Chuncheon 24341, Korea.
Institute of Forest Science, Kangwon National University, Chuncheon 24341, Korea.
Polymers (Basel). 2021 May 24;13(11):1709. doi: 10.3390/polym13111709.
We aimed to improve the mechanical properties of alginate fibers by reinforcing with various cellulose nanofibrils (CNFs). Pure cellulose nanofibril (PCNF), lignocellulose nanofibril (LCNF) obtained via deep eutectic solvent (DES) pretreatment, and TEMPO-oxidized lignocellulose nanofibril (TOLCNF) were employed. Sodium alginate (AL) was mixed with PCNF, LCNF, and TOLCNF with a CNF content of 5-30%. To fabricate microcomposite filaments, the suspensions were wet-spun in calcium chloride (CaCl) solution through a microfluidic channel. Average diameters of the microcomposite filaments were in the range of 40.2-73.7 μm, which increased with increasing CNF content and spinning rate. The tensile strength and elastic modulus improved as the CNF content increased to 10%, but the addition of 30% CNF deteriorated the tensile properties. The tensile strength and elastic modulus were in the order of LCNF/AL > PCNF/AL > TOLCNF/AL > AL. An increase in the spinning rate improved the tensile properties.
我们旨在通过用各种纤维素纳米纤维（CNF）增强来改善藻酸盐纤维的机械性能。使用了纯纤维素纳米纤维（PCNF）、通过深共熔溶剂（DES）预处理获得的木质纤维素纳米纤维（LCNF）以及TEMPO氧化木质纤维素纳米纤维（TOLCNF）。将海藻酸钠（AL）与CNF含量为5%-30%的PCNF、LCNF和TOLCNF混合。为了制造微复合长丝，将悬浮液通过微流体通道在氯化钙（CaCl）溶液中进行湿法纺丝。微复合长丝的平均直径在40.2-73.7μm范围内，其随着CNF含量和纺丝速率的增加而增大。随着CNF含量增加到10%，拉伸强度和弹性模量提高，但添加30%的CNF会使拉伸性能变差。拉伸强度和弹性模量的顺序为LCNF/AL > PCNF/AL > TOLCNF/AL > AL。纺丝速率的增加改善了拉伸性能。
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