A nanocellulose-based film with excellent antimicrobial and antioxidant activity was developed by adding Pickering emulsion which was stabilized by functionalized particles. First, TOCNC-g-PEI nanoparticles were prepared by grafting polyethyleneimine (PEI) onto TEMPO-oxidized cellulose nanocrystals (TOCNCs) and used to stabilize oregano essential oil (OEO) Pickering emulsions. The contact angle of TOCNC-g-PEI nanoparticles was 79.7°, and the minimum inhibitory concentration against L.monocytogenes and E.coli was 0.50 mg/mL. Second, the emulsion droplets were stably dispersed in cellulose nanofibril (CNF) suspensions owing to the depletion stability of CNFs. Finally, the films were dried and emulsion droplets formed oil core/CNF shell microcapsules in active CNF films and completely encapsulated OEO in active CNF films. The inhibition rates of the film against L.monocytogenes and E.coli were 97.28% and 97.23%, respectively. The influence of Pickering emulsion on the active CNF films was discussed. The developed active CNF films have promising application in food preservation and active packaging.

通过添加由功能化颗粒稳定的 Pickering 乳液，开发了一种具有优异抗菌和抗氧化活性的纳米纤维素基薄膜。首先，TOCNC- g -PEI 纳米粒子通过将聚乙烯亚胺 (PEI) 接枝到 TEMPO 氧化的纤维素纳米晶体 (TOCNCs) 上来制备，并用于稳定牛至精油 (OEO) Pickering 乳液。TOCNC-的接触角克-PEI纳米颗粒为79.7°，并抵靠最低抑菌浓度L.monocytogenes和大肠杆菌为 0.50 毫克/毫升。其次，由于 CNF 的消耗稳定性，乳液液滴稳定地分散在纤维素纳米纤维 (CNF) 悬浮液中。最后，将薄膜干燥，乳液液滴在活性 CNF 薄膜中形成油核/CNF 壳微胶囊，并在活性 CNF 薄膜中完全包封 OEO。对该膜的抑制率L.monocytogenes和大肠杆菌分别为97.28％和97.23％。讨论了Pickering乳液对活性CNF薄膜的影响。开发的活性CNF薄膜在食品保鲜和活性包装方面具有广阔的应用前景。