Cellulose nanocrystals based clove oil Pickering emulsion for enhanced antibacterial activity

An effective antibacterial system was developed by using dove essential oil Pickering emulsion (CO-PE). The carboxymethyl cellulose sodium modified cellulose nanoaystals (CNC) was used as the stabilizer of CO-PE, which were prepared by environmentally friendly approach of homogenization technology. The factors affecting the formation and stability of CO-PE were studied, such as CNC concentration, homogenization pressure, CO concentration and ionic concentration and pH. And the antibacterial performance of CO-PE against E. coli and S. aureus was investigated by determining the minimal inhibitory concentration (MIC). The results showed that 1% CNC stabilized CO-PE exhibited small droplet size and rough surface, and had good stability at high pH values or salt concentration, owing to the presence of CNC on interface of droplet. And the CNC-stabilized COPE exhibited higher antimicrobial activity at equivalent CO concentration, which might be attributed to efficiently adhere to bacterial membrane. Therefore, our research would provide new insights for antibacterial application of Pickering emulsions loading essential oils in the food and other industries. (C) 2020 Elsevier B.V. All rights reserved.

Automated summary

An effective antibacterial system using dove essential oil Pickering emulsion (CO-PE) was developed, with carboxymethyl cellulose sodium modified cellulose nanoaystals (CNC) as the stabilizer. Factors affecting the formation and stability of CO-PE were studied, and its antibacterial performance against E. coli and S. aureus was investigated. The results showed that 1% CNC stabilized CO-PE exhibited small droplet size and rough surface, with good stability at high pH values or salt concentration, and higher antimicrobial activity at equivalent CO concentration.