2020
Benito-González, Isaac; Jaén-Cano, Carmen M.; López-Rubio, Amparo; Martínez-Abad, Antonio; Martínez-Sanz, Marta
Valorisation of vine shoots for the development of cellulose-based biocomposite films with improved performance and bioactivity Artículo de revista
En: International Journal of Biological Macromolecules, vol. 165, pp. 1540-1551, 2020, ISSN: 0141-8130.
Resumen | Enlaces | BibTeX | Etiquetas: Agar, Bio-based packaging, Cellulosic fractions, Vine shoots, Waste biomass
@article{BENITOGONZALEZ20201540,
title = {Valorisation of vine shoots for the development of cellulose-based biocomposite films with improved performance and bioactivity},
author = {Isaac Benito-González and Carmen M. Jaén-Cano and Amparo López-Rubio and Antonio Martínez-Abad and Marta Martínez-Sanz},
url = {https://www.sciencedirect.com/science/article/pii/S014181302034602X},
doi = {https://doi.org/10.1016/j.ijbiomac.2020.09.240},
issn = {0141-8130},
year = {2020},
date = {2020-01-01},
journal = {International Journal of Biological Macromolecules},
volume = {165},
pages = {1540-1551},
abstract = {This work reports on the valorization of Tempranillo vine shoots for the development of bio-based packaging materials. Cellulose (F3) and nanocellulose (NANO F3) were produced by the conventional method, while less purified cellulosic fractions (F2A) and nanocrystals (NANO F2A) were extracted by simplified protocols (omitting Soxhlet and alkaline treatments) to reduce production costs and environmental impact and evaluate the potential added functionalities of these less purified materials. Although most of the hemicelluloses in F2A were digested upon acid hydrolysis, a small fraction remained in NANO F2A. On the other hand, the presence of a minor xylan fraction in F3 limited the access of sulphuric acid towards the cellulose microfibrils, hindering hydrolysis and producing heterogeneous fibrillar structures in NANO F3. The obtained materials were used to produce cellulosic films, as well as blends with agar, and their performance properties were evaluated. Overall, NANO F2A films showed the best compromise between performance and sustainability and presented additional antioxidant capacity. The properties of the films could be adjusted by the incorporation of agar, improving their ductility and water permeability.},
keywords = {Agar, Bio-based packaging, Cellulosic fractions, Vine shoots, Waste biomass},
pubstate = {published},
tppubtype = {article}
}
This work reports on the valorization of Tempranillo vine shoots for the development of bio-based packaging materials. Cellulose (F3) and nanocellulose (NANO F3) were produced by the conventional method, while less purified cellulosic fractions (F2A) and nanocrystals (NANO F2A) were extracted by simplified protocols (omitting Soxhlet and alkaline treatments) to reduce production costs and environmental impact and evaluate the potential added functionalities of these less purified materials. Although most of the hemicelluloses in F2A were digested upon acid hydrolysis, a small fraction remained in NANO F2A. On the other hand, the presence of a minor xylan fraction in F3 limited the access of sulphuric acid towards the cellulose microfibrils, hindering hydrolysis and producing heterogeneous fibrillar structures in NANO F3. The obtained materials were used to produce cellulosic films, as well as blends with agar, and their performance properties were evaluated. Overall, NANO F2A films showed the best compromise between performance and sustainability and presented additional antioxidant capacity. The properties of the films could be adjusted by the incorporation of agar, improving their ductility and water permeability.
Martínez-Sanz, Marta; Cebrián-Lloret, Vera; Mazarro-Ruiz, Jesús; López-Rubio, Amparo
Improved performance of less purified cellulosic films obtained from agar waste biomass Artículo de revista
En: Carbohydrate Polymers, vol. 233, pp. 115887, 2020, ISSN: 0144-8617.
Resumen | Enlaces | BibTeX | Etiquetas: Agar, Biopolymers, Cellulose, Packaging, Seaweed, Valorization
@article{MARTINEZSANZ2020115887,
title = {Improved performance of less purified cellulosic films obtained from agar waste biomass},
author = {Marta Martínez-Sanz and Vera Cebrián-Lloret and Jesús Mazarro-Ruiz and Amparo López-Rubio},
url = {https://www.sciencedirect.com/science/article/pii/S0144861720300618},
doi = {https://doi.org/10.1016/j.carbpol.2020.115887},
issn = {0144-8617},
year = {2020},
date = {2020-01-01},
journal = {Carbohydrate Polymers},
volume = {233},
pages = {115887},
abstract = {The residues generated after the extraction of agar from Gelidium sesquipedale by means of a hot-water treatment, with (NaOH+HW residue) and without (HW residue) an alkali pre-treatment have been valorized to produce high performance cellulosic films. Both residues were mainly composed of structural carbohydrates (in particular, agar), ashes and lipids. The residual agar could only be completely removed by applying a two-step process based on bleaching and alkaline treatments. The application of the alkaline pre-treatment for the extraction of agar did not significantly affect the properties of the films produced from the extracted fractions, hence making the HW residue more sustainable and economically viable. The agar remaining in the less purified fractions had a positive effect on the performance of the films, improving their transparency, mechanical properties and water vapour barrier, outperforming benchmark biopolymers; in addition, these materials presented antioxidant capacity inhibiting the degradation of β-carotene.},
keywords = {Agar, Biopolymers, Cellulose, Packaging, Seaweed, Valorization},
pubstate = {published},
tppubtype = {article}
}
The residues generated after the extraction of agar from Gelidium sesquipedale by means of a hot-water treatment, with (NaOH+HW residue) and without (HW residue) an alkali pre-treatment have been valorized to produce high performance cellulosic films. Both residues were mainly composed of structural carbohydrates (in particular, agar), ashes and lipids. The residual agar could only be completely removed by applying a two-step process based on bleaching and alkaline treatments. The application of the alkaline pre-treatment for the extraction of agar did not significantly affect the properties of the films produced from the extracted fractions, hence making the HW residue more sustainable and economically viable. The agar remaining in the less purified fractions had a positive effect on the performance of the films, improving their transparency, mechanical properties and water vapour barrier, outperforming benchmark biopolymers; in addition, these materials presented antioxidant capacity inhibiting the degradation of β-carotene.
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