采用静电纺丝法成功将纳米纤维素晶体(CNCs)植入聚乳酸(PLA)基体中,制备出网状结构的绿色纳米复合材料,并探讨了 PLA/CNCs 薄膜的微观形貌、结晶度、热学性能和机械性能随 CNCs 添加量的变化趋势.结果表明,随着 CNCs 添加量的增加,静电纺 PLA/CNCs 纳米复合材料薄膜珠状纤维减少,纤维直径增大；纳米复合纤维薄膜的结晶度提高了87．9％；纳米复合纤维薄膜的最大热解温度由369．36℃提升到380．02℃；纳米复合纤维的拉伸性能随CNCs添加量的增加而显著提高,CNCs 添加量为11％(质量分数)时得到的最大拉伸力和拉伸强度最大分别为3．76 N和4．58 MPa,与纯PLA薄膜相比分别提高了289％和159％.
An electrospinning process was successfully utilized to fabricate poly(lactic acid)/cellulose nanocrys-tals (PLA/CNCs)nanofibrous films.The morphological,crystallinity,thermal and mechanical properties of the PLA/CNCs nanofibrous composite films were investigated.The SEM results showed that the bead-on-string nanofibers gradually decreased with increasing the CNC content,while the fiber diameter increased.The crys-tallinity index (CI)of the nanofibrous film with 11wt% CNC content was up to 87.9%,compared with degree of crystallinity for the pure PLA nanofibrous film.The maximum thermal decomposition temperature was in-creased from 369.36 to 380.02 ℃ as CNC content increased from 0 to 11%.Tensile test indicated that the tensile strength of the PLA/CNC nanofibrous films was significantly increased with increasing CNC content.The nano-fibrous film with 11wt% CNCs showed the maximum tensile stress (3.76 N)and the highest tensile strength (4.58 MPa),which improved 289% and 159% respectively compared with the pure PLA film.
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