Title:	Nanofibrillated cellulose originated from Rhododendron ponticum to produce scaffolds using 3D printing for biomedical applications.
Authors:	LIMA, T. A. de M. de LIMA, G. G. de MUNIR, N. COUTINHO, J. R. T. MITCHELL, G. R. MAGALHAES, W. L. E. NUGENT, M. J.
Affiliation:	TIELIDY A. DE M. DE LIMA, TECHNOLOGICAL UNIVERSITY OF THE SHANNON; GABRIEL GOETTEN DE LIMA, UNIVERSIDADE FEDERAL DO PARANÁ; NIMRA MUNIR, ATLANTIC TECHNOLOGICAL UNIVERSITY; JOANA RAQUEL TEIXEIRA COUTINHO, INSTITUTE POLYTECHNIC OF LEIRIA; GEOFFREY ROBERT MITCHELL, INSTITUTE POLYTECHNIC OF LEIRIA; WASHINGTON LUIZ ESTEVES MAGALHAES, CNPF; MICHAEL J.D. NUGENT, TECHNOLOGICAL UNIVERSITY OF THE SHANNON.
Date Issued:	2023
Citation:	International Journal of Biological Macromolecules, v. 253, 126556, 2023.
Description:	Rhododendron ponticum is an invasive species that spreads rapidly and is described as one of the biggest threats to peatlands in Ireland. This study offers an innovative approach to utilizing Rhododendron waste. Initially, sawdust was submitted to a bleaching treatment and the nanofibrillated cellulose (NFC) was obtained using two different methods: ultra-fine friction grinding and twin-screw extrusion with the assistance of TEMPO (2,2,6,6- tetramethyl-1-piperidinyloxy) pre-treatment. The samples processed through twin-screw extrusion exhibited the presence of NFC at five intervals, as confirmed by TEM analysis. However, these samples displayed a higher diameter deviation compared to those processed through grinding alone. Notably, after 20 extrusion steps, the NFC diameter became more uniform, reaching approximately 35 nm. Sedimentation tests showed that extrusion produced more homogeneous cellulose size than the grinder method. However, FTIR characterization for the samples showed a unique band related to C-O-C glycosidic linkage. The results showed that grinding breaks these groups resulting in crystallinity values lower than extrusion, 50 % compared 60 %. Therefore, NFC with 20 steps by grinding was blended with polycaprolactone to produce a 3D scaffold using a 3D printer at different ratios of 1–5 % addition. The effect of 1 % of NFC was unique showing significant enhanced mechanical properties compared to pure polycaprolactone (PCL), additionally, the NFC does not exhibit toxicity so these materials show promise for biomedical applications.
NAL Thesaurus:	Invasive species Extrusion Rhododendron ponticum
Keywords:	Plant-based materials Ultra-fine friction grinder Irlanda Celulose nanofibrilada Biomedicina
ISSN:	0141-8130
DOI:	http://dx.doi.org/10.1016/j.ijbiomac.2023.126556
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CNPF)