Laccase-mediated functionalization of chitosan with 4-hexyloxyphenol enhances antioxidant and hydrophobic properties of copolymer
- Qilu University of Technology (Shandong Academy of Sciences), Jinan (China); Univ. of Tennessee, Knoxville, TN (United States)
- Qilu University of Technology (Shandong Academy of Sciences), Jinan (China)
- Univ. of Tennessee, Knoxville, TN (United States)
In this paper, an effective method to functionalize chitosan with 4-hexyloxyphenol (HP) under homogeneous reaction conditions was developed using laccase as the catalyst. The resulting copolymer was characterized for chemical structure, grafted-HP content, surface morphology, thermal stability, antioxidant capacity, hydrophobic properties and tensile strength. Solid-state 13C NMR spectrum confirmed the incorporation of HP onto chitosan. X-ray diffraction (XRD) showed a decrease in the degree of crystallinity for laccase/HP treated chitosan compared to pure chitosan. The grafted-HP content in laccase/HP-treated chitosan first increased and then declined with increase of the initial HP/chitosan ratio. A heterogeneous surface with spherical particles on the laccase/HP treated chitosan was observed by environmental scanning electron microscopy (ESEM) and scanning probe microscopy (SPM). The laccase/HP treatment of chitosan improved the thermal stability of copolymer. More significantly, the HP functionalized chitosan showed greatly improved ABTS+ and DPPH radicals scavenging capacity, compared with pure chitosan. The hydrophobicity property of the HP functionalized chitosan also significantly increased although its tensile strength decreased. Finally, this new type of composite with double functionalities (i.e., antioxidant and hydrophobic) could potentially be used as food packaging materials or coating agents.
- Research Organization:
- Univ. of Tennessee, Knoxville, TN (United States); Qilu Univ. of Technology, Jinan (China)
- Sponsoring Organization:
- USDOE; Key Research and Development Program of Shandong Province (China); National Natural Science Fund (China); National Natural Science Foundation of China (NSFC)
- Grant/Contract Number:
- AC05-00OR22725; 2016GGX108002; 31370581; 31540009
- OSTI ID:
- 1468142
- Journal Information:
- Journal of Biotechnology, Vol. 269; ISSN 0168-1656
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Enhancing hydrophobicity, strength and UV shielding capacity of starch film via novel co-cross-linking in neutral conditions
|
journal | November 2018 |
Preparation of Gallic Acid-Grafted Chitosan Using Recombinant Bacterial Laccase and Its Application in Chilled Meat Preservation
|
journal | August 2018 |
Horseradish peroxidase-mediated synthesis of an antioxidant gallic acid- g -chitosan derivative and its preservation application in cherry tomatoes
|
journal | January 2018 |
Similar Records
Mechanical, Barrier and Antioxidant Properties of Chitosan Films Incorporating Cinnamaldehyde
Bioactivity Potentials of Biodegradable Chitosan/Gelatin Film Forming Solutions Combined with Monoterpenoid Compounds