具有高延展性的甲基纤维素/纤维素纳米复合纤维
Methyl cellulose/cellulose nanocrystal nanocomposite fibers with high ductility
摘要：
将相应的纳米复合水凝胶在乙醇凝固浴中进行湿法纺丝，然后干燥，制备了具有高韧性和高韧性模量的甲基纤维素/纤维素嵌段共聚物（MC/CNC）纳米复合纤维。将水凝胶MC aq.浓度维持在1重量%，而CNC aq.负载量在0 - 3重量%范围内系统地变化。该方法产生25/75重量%/重量%至95/5重量%/重量%的MC/CNC纤维组合物。用80/20重量%/重量%的MC/CNC组合物实现了最佳的机械性能，允许高应变（36.1%）和韧性模量（48.3MJ/m^3），仍然保持高强度（190 MPa）。此外，我们证明了MC/CNC纤维的连续纺丝是可能的。结果表明，从环境友好的水溶剂纺MC基高韧性复合纤维的可能性。
英文摘要：
Methylcellulose/cellulose nanocrystal (MC/CNC) nanocomposite fibers showing high ductility and high modulus of toughness were prepared by a simple aqueous wet-spinning from corresponding nanocomposite hydrogels into ethanol coagulation bath followed by drying. The hydrogel MC aq. concentration was maintained at 1 wt-% while the CNC aq. loading was systematically varied in the range 0 - 3 wt-%. This approach resulted in MC/CNC fiber compositions from 25/75 wt-%/wt-% to 95/5 wt-%/wt-%. The optimal mechanical properties were achieved with the MC/CNC composition of 80/20 wt-%/wt-% allowing high strain (36.1 %) and modulus of toughness (48.3 MJ/m^3), still keeping a high strength (190 MPa). Further, we demonstrate that the continuous spinning of MC/CNC fibers is potentially possible. The results indicate possibilities to spin MC-based highly ductile composite fibers from environmentally benign aqueous solvents.
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