期刊
JOURNAL OF ZHEJIANG UNIVERSITY-SCIENCE B
卷 22, 期 6, 页码 450-461出版社
ZHEJIANG UNIV
DOI: 10.1631/jzus.B2000683
关键词
Nanofiber; Nanocellulose; Agave americana L; Ricinus communis L; Crystallinity; Invasive species; Biomedical application
类别
资金
- Programa de Cooperacion Territorial INTERREG V-A MAC [MAC/4.6d/229]
- FCT-Fundacao para a Ciencia e a Tecnologia [UIDB/00674/2020]
- ARDITI-Agencia Regional para o Desenvolvimento da Investigacao Tecnologia e Inovacao [M1420-01-0145-FEDER-000005-CQM+, M1420-09-5369-FSE-000001, 002458/2015/132]
In this study, cellulose nanofibers were successfully extracted from invasive species Agave americana and Ricinus communis fibers, showing high crystallinity and cytocompatibility. The obtained nanofibers were characterized for morphology, chemical composition, and crystallinity using various techniques. Biological evaluation demonstrated that the nanofibers were cytocompatible with HEK293T cells, indicating their potential for biomedical applications.
In this study, the fibers of invasive species Agave americana L. and Ricinus communis L. were successfully used for the first time as new sources to produce cytocompatible and highly crystalline cellulose nanofibers. Cellulose nanofibers were obtained by two methods, based on either alkaline or acid hydrolysis. The morphology, chemical composition, and crystallinity of the obtained materials were characterized by scanning electron microscopy (SEM) together with energy-dispersive X-ray spectroscopy (EDX), dynamic light scattering (DLS), X-ray diffraction (XRD), and Fourier transform infrared (FTIR) spectroscopy. The crystallinity indexes (CIs) of the cellulose nanofibers extracted from A. americana and R. communis were very high (94.1% and 92.7%, respectively). Biological studies evaluating the cytotoxic effects of the prepared cellulose nanofibers on human embryonic kidney 293T (HEK293T) cells were also performed. The nanofibers obtained using the two different extraction methods were all shown to be cytocompatible in the concentration range assayed (i.e., 0-500 mu g/mL). Our results showed that the nanocellulose extracted from A. americana and R. communis fibers has high potential as a new renewable green source of highly crystalline cellulose-based cytocompatible nanomaterials for biomedical applications.
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