期刊
CARBOHYDRATE POLYMERS
卷 212, 期 -, 页码 421-429出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2019.02.079
关键词
Chitosan; Nanosilica; Film-forming solution; LF-NMR; Performance
资金
- National Natural Science Foundation [31571784]
- Excellent Youth Foundation of Hubei Province Natural Science Foundation [2018CFA073]
- Fundamental Research Funds for the Central Universities [2662018JC022]
Chitosan based organic-inorganic composite films were prepared through direct incorporation of nanosilica particles in order to enhance their performance for potential packaging material. After the addition of nanosilica, the viscosity of film-forming solutions (FFSs) decreased obviously, and the G' of FFS with 25% of nanosilica was higher than that of other FFSs with nanosilica. In low field nuclear magnetic resonance (LF-NMR) determination, the addition of 25% of nanosilica gave rise to the lowest relaxation time and peak area proportion of T-21 component. Additionally, the changes of structure characteristic of composite films with different nanosilica content were analyzed through FTIR spectroscopy, SEM and XRD analysis. The thermal stability of films improved markedly with increasing nanosilica. The optimal mechanical properties of films were yielded at 25% of nanosilica. Furthermore, the introduction of nanosilica significantly (p < 0.05) decreased the swelling ratio of chitosan based films at pH 7.6 and pH 2.6.
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