Implementation of a Circular Bioeconomy: Obtaining Cellulose Fibers Derived from Portuguese Vine Pruning Residues for Heritage Conservation, Oxidized with TEMPO and Ultrasonic Treatment

Liliana Araújo, Adriana R. Machado, Sérgio Sousa, Óscar L. Ramos, Alessandra B. Ribeiro, Francisca Casanova, Manuela E. Pintado, Eduarda Vieira and Patrícia Moreira ()
Additional contact information
Liliana Araújo: Centro de Investigação em Ciência e Tecnologias das Artes (CITAR), Universidade Católica Portuguesa, 4169-005 Porto, Portugal
Adriana R. Machado: Centro de Biotecnologia e Química Fina (CBQF), Universidade Católica Portuguesa, 4169-005 Porto, Portugal
Sérgio Sousa: Centro de Biotecnologia e Química Fina (CBQF), Universidade Católica Portuguesa, 4169-005 Porto, Portugal
Óscar L. Ramos: Centro de Biotecnologia e Química Fina (CBQF), Universidade Católica Portuguesa, 4169-005 Porto, Portugal
Alessandra B. Ribeiro: Centro de Biotecnologia e Química Fina (CBQF), Universidade Católica Portuguesa, 4169-005 Porto, Portugal
Francisca Casanova: Centro de Biotecnologia e Química Fina (CBQF), Universidade Católica Portuguesa, 4169-005 Porto, Portugal
Manuela E. Pintado: Centro de Biotecnologia e Química Fina (CBQF), Universidade Católica Portuguesa, 4169-005 Porto, Portugal
Eduarda Vieira: Centro de Investigação em Ciência e Tecnologias das Artes (CITAR), Universidade Católica Portuguesa, 4169-005 Porto, Portugal
Patrícia Moreira: Centro de Investigação em Ciência e Tecnologias das Artes (CITAR), Universidade Católica Portuguesa, 4169-005 Porto, Portugal

Agriculture, 2023, vol. 13, issue 10, 1-19

Abstract: Inspired by the principles of the circular economy, using vineyard pruning residues as a source of raw materials for producing nanocellulose is a promising approach to transforming vineyard resources into value-added products. This study aimed to obtain and characterize cellulose and cellulose nanofibers from such sources. The cellulose collected from different fractions of micronized stems (500, 300, 150 μm, and retain) of vines was submitted to autohydrolysis and finally bleached. Soon, it underwent treatment via (2,2,6,6-tetrametil-piperidi-1-nil)oxil (TEMPO) oxidation and ultrasonic to obtain nanocellulose fibers. The cellulose films were obtained at a microscale thickness of 0.05 ± 0.00; 0.37 ± 0.03; 0.06 ± 0.01 e 0.030 ± 0.01 mm, with the following particle size: 500 µm, 300 µm, 150 µm, and retain (<150 µm). The bleaching efficiency of the cellulose fibers of each particle size fraction was evaluated for color through a colorimeter. In addition, the extraction of cellulose fibers was assessed by infrared with Fourier transform, and size and shape were assessed by microscopy. Differential scanning calorimetry and X-ray diffraction were performed to confirm the thermal and crystalline properties. Combining autohydrolysis with a bleaching step proved to be a promising and ecological alternative to obtain white fractions rich in cellulose. It was possible to perform the extraction of cellulose to obtain nanocellulose fibers from vine pruning residues for the development of coatings for the conservation of heritage buildings from environmental conditions through an environmentally friendly process.

Keywords: bleached; circular economy; nanocellulose; valorization; heritage conservation (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2023
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/2077-0472/13/10/1905/pdf (application/pdf)
https://www.mdpi.com/2077-0472/13/10/1905/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jagris:v:13:y:2023:i:10:p:1905-:d:1250153

Access Statistics for this article

Agriculture is currently edited by Ms. Leda Xuan

More articles in Agriculture from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().