Fabrication, characterization and biodegradability of oil–in–water pickering emulsions stabilized by cellulose nanocrystals

作者

Elena Udoratina¹ , Petr Sitnikov¹ , Philip Legki¹ , Julia Druz¹ , Nikita Ushakov¹ , Michael Torlopov¹

1. Institute of Chemistry of Komi Science Centre of the Ural Branch of the Russian Academy of Sciences

会议/活动

Asian Symposium on Advanced Materials (ASAM-8), July 2023 (Novosibirsk, Russian Federation)

海报摘要

This study has investigated the influence of cellulose nanocrystals (CNC) with native and partially acetylated surface on the formation, stability, rheology and biodegradability of the Pickering emulsion in a crude oil/water (co/w) system. In all investigated systems it was observed that the CNC concentrations of 7 mg/mL led to the emulsions showing stability over time. The increase in concentration of background electrolyte (NaCl) leads to the droplets of emulsions becoming smaller. It was demonstrated that the rheology of co/w emulsions stabilized by CNC depends to a large extent on colloid-chemical properties of nanocellulose particles. Calculations and experimental methods were used to study the changes in the acid-base properties of CNC on the surface of emulsion droplets. The formation of Pickering emulsions leads to the oxidation of oil by Rhodococcus egvi in aerobic conditions becoming more effective, provided that the environment includes mineral salts of nitrogen, potassium and phosphorus.

关键词

Pickering emulsion, Nanoparticles cellulose nanocrystals, Oil biodegradation

研究领域

Chemistry, Nanoengineering, Environmental Sciences

参考文献

1. I. Kalashnikova et al. New Pickering emulsions stabilized by bacterial cellulose nanocrystals, Langmuir 27 (12) (2011) 7471–7479. doi: 10.1021/la200971f
2. I. Kalashnikova et al. Cellulosic nanorods of various aspect ratios for oil in water Pickering emulsions, Soft. Matter, 9 (3) (2013) 952–959. doi: 10.1039/C2SM26472B
3. S. Parajuli et al.. Surface properties of cellulose nanocrystal stabilized crude oil emulsions and their effect on petroleum biodegradation, Colloids Surfaces A Physicochem. Eng. Asp, 596 (2020)124705. doi: 10.1016/j.colsurfa.2020.124705

基金

1. Russian Science Foundation (No. 22-23-00271)

补充材料

暂无数据

附加信息

利益冲突

No competing interests were disclosed.

数据可用性声明

The datasets generated during and / or analyzed during the current study are available from the corresponding author on reasonable request.

知识共享许可协议

Copyright © 2023 Udoratina et al. This is an open access work distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.