不同形貌纳米纤维素对天然橡胶力学性能的影响

将两种纳米纤维素[纤维素纳米丝（CNF）和纤维素纳米晶（CNC）]与天然胶乳通过溶液共混和浇注成膜制备CNF/天然橡胶（NR）和CNC/NR复合材料，考察CNF和CNC对NR的补强效果。结果表明：CNF与CNC对NR都具有补强效果，当二者用量相同时，CNF对NR的补强效果更显著；在成膜过程中，CNC发生沉降，在底部形成CNC富集层；当CNC用量大于5份时，CNC/NR复合材料在拉伸过程中CNC富集层发生滑脱分层；纳米纤维素与NR的极性相差较大，提高二者的相容性和界面结合力需进一步研究。;Two kinds of nanocellulose: cellulose nanofibrils (CNF) and cellulose nanocrystals (CNC) were solution blended with natural rubber (NR), and casting into films to obtain natural rubber/cellulose nanofibrils and natural rubber/cellulose nanocrystals composites. The impact of the content of the nanocellulose on the mechanical properties of natural rubber was studied. The results showed that both the CNF and CNC had an obvious reinforcing effect, and the reinforcing effect of CNF on NR is more significant than that of CNC with the same content. In addition, the CNC would settle down from the solution during the casting process and form a layer with enriched CNC at the bottom. When the CNC content was higher than 5%, the enriched CNC layer fell off from the film during the tensile test