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TOCNC-g-PEI nanoparticle encapsulated oregano essential oil for enhancing the antimicrobial activity of cellulose nanofibril packaging films
Carbohydrate Polymers ( IF 10.7 ) Pub Date : 2021-09-10 , DOI: 10.1016/j.carbpol.2021.118654
Min Wu 1 , Jian Yang 2 , Shunli Chen 2 , Peng Lu 1 , Ruifang Wang 2
Affiliation  

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.



中文翻译:

TOCNC-g-PEI纳米颗粒包裹的牛至精油增强纤维素纳米原纤维包装膜的抗菌活性

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-PEI纳米颗粒为79.7°,并抵靠最低抑菌浓度L.monocytogenes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。

更新日期:2021-09-16
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