静电纺丝制备聚乳酸/纤维素纳米晶复合纤维

Polylactide/Cellulose Nanocrystal Composite Fibers Prepared through Electrospinning

采用静电纺丝法制备了完全生物可降解的聚乳酸/纤维素纳米晶复合纤维,并对纤维形态和结构进行了表征。结果表明,纳米棒状的纤维素纳米晶并不沿纤维轴择优取向。随纤维素纳米晶的浓度增加,复合纤维的直径逐渐减小,表面多孔结构数量也有所下降,这是由于纺丝液粘度的增加和极化程度的增加相互竞争所致。因此,纤维素纳米晶不仅可用于制备复合纤维,还可用于调控纤维的形态。

Polylactide/cellulose nanocrystal composite fibers were prepared by electrospinning. The morphology and structure of as-obtained fully biodegradable fibers were studied. The results reveal that nano-rod shaped cellulose nanocrystals are not oriented preferentially along with fiber axial direction. The presence of cellulose nanocrystals decreases electrospun fiber diameters and weakens the formation of surface pore structure. This is due to the competition between increased system viscosity and polarity. This work also provides an interesting way to regulate polylactide fiber morphology using cellulose nanocrystals.