| Title | Alkaline hydrolysis of biomass as an alternative green method for bioplastics preparation: In situ cellulose nanofibrillation |
|---|---|
| ID_Doc | 14532 |
| Authors | Merino, D; Athanassiou, A |
| Title | Alkaline hydrolysis of biomass as an alternative green method for bioplastics preparation: In situ cellulose nanofibrillation |
| Year | 2023 |
| Published | |
| Abstract | Mild acid hydrolysis of various plant residues has been proposed in recent years as a novel way of transforming biomass into bioplastics. However, the alkaline hydrolysis of such residues has not yet been studied for this purpose. In this work, an in-depth comparative study is carried out for the first time on the physicochemical, thermal, mechanical, and morphological aspects of the bioplastics produced by acid and alkaline hydrolysis starting from two different plant residues: spinach stems (SS) and peanut shells (PS). The chemical treatments followed here, produced self-standing SS bioplastics and hydrolyzed PS powders that were incorporated as fillers in a thermoplastic starch (TPS) matrix to obtain composites. The alkaline hydrolysis led to bioplastics with su-perior mechanical and barrier properties than those obtained from acid hydrolyzed biomass. The Young's modulus (YM) of SS-bioplastics produced upon alkaline hydrolysis, tripled, their tensile strength (TS) almost doubled, and their water vapor permeability (WVP) was reduced by 15%, compared to SS-bioplastics produced upon acidic hydrolysis. TPS-alkali hydrolyzed PS composites showed increments of 22% in YM, 10% in TS, and a reduction of about 30% in their WVP compared to the respective acid hydrolyzed composites. The physico-chemical, thermal, and morphological analysis confirmed that the main cause of these improvements was cel-lulose nanofibrillation, which was favored by the greater efficiency of the alkaline medium to hydrolyze the pectin, hemicellulose, and lignin polymers. This research represents a step ahead in understanding the processes of transforming non-edible vegetable wastes into sustainable bioplastics and comes in a critical moment when an urgent transition towards a circular economy is need, and industrial processes are expected to reduce their carbon footprint and generate zero waste. |
Similar Articles
| ID | Score | Article |
|---|---|---|
13131
|
Yu, YH; Guo, W; Qu, JJ; Wang, S; Wang, XG; He, Y; Yang, Y; He, Q; Liu, XD Preparation and characterization of dialdehyde cellulose nanocrystals from the waste nutshell(2023) | |
| 14277
|
Merino, D; Quilez-Molina, AI; Perotto, G; Bassani, A; Spigno, G; Athanassiou, A A second life for fruit and vegetable waste: a review on bioplastic films and coatings for potential food protection applications(2022)Green Chemistry, 24, 12 | |
| 13852
|
Romaní, A; Del-Río, PG; Rubira, A; Pérez, MJ; Garrote, G Co-valorization of discarded wood pinchips and sludge from the pulp and paper industry for production of advanced biofuels(2024) | |
| 20954
|
Rafiq, S; Bhat, MI; Ahmad, MI; Rashid, SJ; Fayaz, I; Sofi, SA; Muzaffar, K; Mir, MJ; Majid, D; Amin, T; Islam, RU; Dar, BN; Makroo, HA Non-edible biomass as innovative substrate for lipid biosynthesis: a step towards circular economy(2023) | |
| 12700
|
Pecoraro, MT; Mellinas, C; Piccolella, S; Garrigos, MC; Pacifico, S Hemp Stem Epidermis and Cuticle: From Waste to Starter in Bio-Based Material Development(2022)Polymers, 14.0, 14 | |
| 14317
|
Barkane, A; Jurinovs, M; Briede, S; Platnieks, O; Onufrijevs, P; Zelca, Z; Gaidukovs, S Biobased Resin for Sustainable Stereolithography: 3D Printed Vegetable Oil Acrylate Reinforced with Ultra-Low Content of Nanocellulose for Fossil Resin Substitution(2023)3D Printing And Additive Manufacturing, 10, 6 | |
| 9919
|
Efthymiou, MN; Tsouko, E; Papagiannopoulos, A; Athanasoulia, IG; Georgiadou, M; Pispas, S; Briassoulis, D; Tsironi, T; Koutinas, A Development of biodegradable films using sunflower protein isolates and bacterial nanocellulose as innovative food packaging materials for fresh fruit preservation(2022)Scientific Reports, 12.0, 1 | |
| 9254
|
Righetti, MC; Cinelli, P; Mallegni, N; Massa, CA; Aliotta, L; Lazzeri, A Thermal, Mechanical, Viscoelastic and Morphological Properties of Poly(lactic acid) based Biocomposites with Potato Pulp Powder Treated with Waxes(2019)Materials, 12.0, 6 | |
| 22418
|
Sharma, N; Allardyce, BJ; Rajkhowa, R; Agrawal, R Biodegradable Cellulose and Cellulose Nanofibres-Based Coating Materials as a Postharvest Preservative for Horticultural Products(2024)Journal Of Polymers And The Environment, 32.0, 3 | |
| 21185
|
Infurna, G; Botta, L; Maniscalco, M; Morici, E; Caputo, G; Marullo, S; D'Anna, F; Dintcheva, NT Biochar Particles Obtained from Agricultural Carob Waste as a Suitable Filler for Sustainable Biocomposite Formulations(2022)Polymers, 14.0, 15 |