Konjac glucomannan/Pullulan films incorporated with cellulose nanofibrils-stabilized tea tree essential oil Pickering emulsions

Biopolymers , such as polysaccharides are increasingly concern in preparation of food packaging. However, those materials have weakness in properties of mechanics, hydrophobicity , and antibacterial, which limit their applications. In this work, we prepared emulsion (K-PL-CEOs) films with double network (DN) matrix by using konjac glucomannan (KGM) and Pullulan (PL), and incorporated with cellulose nanofibrils (CNF)-stabilized tea tree essential oil (TTEO) Pickering emulsions (CEOs). The effect of CEOs content on the structural and physicochemical properties of K-PL films was investigated. The results showed that CEOs were well dispersed in K-PL film forming matrix. The addition of CEOs could improve the thermal stability, UV-shielding, water resistance and mechanical properties of K-PL-CEOs films. Moreover, K-PL-CEOs films exhibited good antibacterial activity against E. coli and S. aureus . This paper demonstrated that K-PL-CEOs films can be potentially applied as food packaging.