Journal
CARBOHYDRATE POLYMERS
Volume 262, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2021.117902
Keywords
Cellulose; Characterization; Antibacterial activities; Epsilon-poly-L-lysine
Categories
Funding
- National Natural Science Foundation of China (NSFC) [31501436]
- Fundamental Research Funds for the Central Universities [Z1090220122]
- Key Research and Development Program of Shaanxi Province, China [S2020-YF-YBNY-0142]
- Natural Science Foundation of Jiangsu Province [BK20201480]
- Open Research Fund Program of Beijing Key Laboratory of Quality Evaluation Technology for Hygiene and Safety of Plastics, Beijing Technology and Business University, Beijing, China [QETHSP 2020008]
- Fund for Enterprise Technological Innovation in Haixi Prefecture of Qinghai Province [2018-N-502]
- Open Project of Key Laboratory of Green Chemical Process of Ministry of Education [GCP20200206]
- Hubei Key Laboratory of Novel Reactor and Green Chemical Technology (Wuhan Institute of Technology) [K202002]
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In this study, cellulose beads grafted with epsilon-poly-L-lysine were prepared through chemical reactions. The grafted beads showed strong antibacterial activities and biodegradability, indicating potential applications in water purification and food treatment fields.
In recent years, harmful microorganisms in water pose great harm to ecological environment and human health. To solve this problem, epsilon-poly-L-lysine (EPL) grafted cellulose beads were prepared via 2, 2, 6, 6-tetramethylpiperidine-1-oxyl (TEMPO) mediated oxidation and carbodiimide mediated cross-linking reaction. Hydroxyl groups on C6 of cellulose were oxidized to carboxyl groups by TEMPO and grafting reaction was achieved between newly formed carboxyl groups of cellulose and amino of EPL. The beads were characterized by FTIR, SEM, XRD and TGA. The crystalline form of cellulose transformed from cellulose I to cellulose II after being dissolved and regenerated. The grafted cellulose beads showed good antibacterial activities against Gramnegative Escherichia coli, Gram-positive Staphylococcus aureus and Alicyclobacillus acidoterrestris with 10 h. The beads could be biodegraded in soil after 28 days. It is expected that the bio-based composite beads could have potential applications in water purification and food treatment fields.
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