Recent Progress on Lignocellulosic-Based Polymeric Materials

A special issue of Polymers (ISSN 2073-4360). This special issue belongs to the section "Biobased and Biodegradable Polymers".

Deadline for manuscript submissions: 31 March 2025 | Viewed by 3420

Special Issue Editors


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Guest Editor
Faculty of Chemical Engineering and Environmental Protection “Cristofor Simionescu”, “Gheorghe Asachi” Technical University of Iasi, 700050 Iasi, Romania
Interests: biomass fractionation; hemicellulose extraction and characterization; pulping; papermaking; environmentally friendly materials; liquid chromatography
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Guest Editor
Faculty of Chemical Engineering and Environmental Protection, Department of Chemical Engineering, “Gheorghe Asachi” Technical University of Iasi, 700050 Iasi, Romania
Interests: bioresource processing modeling and design; transfer phenomena and unit operations of particulate solids (including applications in biomass processing)
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The concept of lignocellulosic materials refers to matter with a chemical composition that includes natural polymers such as cellulose, hemicelluloses, and lignin. Lignocellulosic materials are regarded as the most abundant category of biomass and originate in plants; they are characterized by heterogeneity, structural diversity, and chemical composition variability. This is the reason why their processing and valorization of various products may be regarded as challenging. In brief, research efforts are targeting both the finding of the particular, specific, and optimal conditions of raw material components’ separation and further value-adding all separated components. Cellulose fibers are raw materials for the production of a wide range of products: paper, bioplastics, and microfibrilated cellulose. Hemicelluloses and other carbohydrates are raw materials for sugar and fine organic chemicals and biofuels, while lignin is a candidate for the production of phenolic derivatives, adhesives, carbon nanofibers, bio-oils, biofuels, and bio-protection agents.

Today, the term lignocellulosic-based polymeric materials address both naturally occurring natural polymer-based bioresources, such as wood, straw, stalks, and other raw biomass types, as well as some of the products resulting from their processing. This Special Issue of Polymers intends to cover subjects concerning the characterization of lignocellulosic materials as well as the processing and applications of the obtained products.

You may choose our Joint Special Issue in Polysaccharides.

Dr. Adrian C. Puiţel
Dr. Mircea Teodor Nechita
Guest Editors

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Keywords

  • lignocellulosic biomass
  • biomaterials
  • fractionation
  • sugars
  • biofuels
  • hemicelluloses
  • lignin
  • fine chemicals

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Published Papers (2 papers)

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Research

12 pages, 2370 KiB  
Article
The Impact of Biomass Composition Variability on the Char Features and Yields Resulted through Thermochemical Processes
by Emanuel-Gheorghita Armanu, Marius Sebastian Secula, Bogdan-Marian Tofanica and Irina Volf
Polymers 2024, 16(16), 2334; https://doi.org/10.3390/polym16162334 - 18 Aug 2024
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Abstract
This paper explores the intricate relations between biomass polymeric composition, thermochemical conversion routes, char yields and features in order to advance the knowledge on biomass conversion processes and customize them to meet specific requirements. An exhaustive characterization has been performed for three types [...] Read more.
This paper explores the intricate relations between biomass polymeric composition, thermochemical conversion routes, char yields and features in order to advance the knowledge on biomass conversion processes and customize them to meet specific requirements. An exhaustive characterization has been performed for three types of biomasses: (i) spruce bark, a woody primary and secondary residue from forestry and wood processing; (ii) wheat straws—agricultural waste harvest from arable and permanent cropland; and (iii) vine shoots, a woody biomass resulting from vineyard waste. Chemical (proximate and ultimate analysis), biochemical, trace elements, and thermal analyses were performed. Also, Fourier transform infrared spectroscopy, Scanning Electron Microscopy, and thermogravimetric analysis were conducted to establish the compositional and structural characteristics of feedstock. The main polymeric components influence the amount and quality of char. The high hemicellulose content recommends wheat straws as a good candidate especially for hydrothermal carbonization. Cellulose is a primary contributor to char formation during pyrolysis, suggesting that vine shoots may yield higher-quality char compared to that converted from wheat straws. It was shown that the char yield can be predicted and is strongly dependent on the polymeric composition. While in the case of spruce bark and wheat straws, lignin has a major contribution in the char formation, cellulose and secondary lignin are main contributors for vine shoots char. Full article
(This article belongs to the Special Issue Recent Progress on Lignocellulosic-Based Polymeric Materials)
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18 pages, 4518 KiB  
Article
Bio-Based Materials as a Sustainable Solution for the Remediation of Contaminated Marine Sediments: An LCA Case Study
by Milvia Elena Di Clemente, George Barjoveanu, Francesco Todaro, Michele Notarnicola and Carmen Teodosiu
Polymers 2024, 16(15), 2101; https://doi.org/10.3390/polym16152101 - 23 Jul 2024
Viewed by 789
Abstract
Contaminated sediments may induce long-term risks to humans and ecosystems due to the accumulation of priority and emerging inorganic and organic pollutants having toxic and bio-accumulation properties that could become a secondary pollution source. This study focused on the screening of novel bio-based [...] Read more.
Contaminated sediments may induce long-term risks to humans and ecosystems due to the accumulation of priority and emerging inorganic and organic pollutants having toxic and bio-accumulation properties that could become a secondary pollution source. This study focused on the screening of novel bio-based materials to be used in the decontamination of marine sediments considering technical and environmental criteria. It aimed to compare the environmental impacts of cellulose-based adsorbents produced at lab scale by using different syntheses protocols that involved cellulose functionalization by oxidation and branching, followed by structuring of an aerogel-like material via Soxhlet extraction and freeze-drying or their combination. As model pollutants, we used 4-nitrobenzaldehyde, 4-nitrophenol, methylene blue, and two heavy metals, i.e., cadmium and chromium. When comparing the three materials obtained by only employing the Soxhlet extractor with different solvents (without freeze-dying), it was observed that the material obtained with methanol did not have a good structure and was rigid and more compact than the others. A Life Cycle Assessment (LCA) was conducted to evaluate the environmental performance of the novel materials. Apart from the hierarchical categorization of the materials based on their technical and environmental performance in eliminating organic pollutants and heavy metal ions, it was demonstrated that the cellulose-based material obtained via Soxhlet extraction with ethanol was a better choice, since it had lower environmental impacts and highest adsorption capacity for the model pollutants. LCA is a useful tool to optimize the sustainability of sorbent materials alongside lab-scale experiments and confirms that the right direction to produce new performant and sustainable adsorbent materials involves not only choosing wastes as starting materials, but also optimizing the consumption of electricity used for the production processes. The main results also highlight the need for precise data in LCA studies based on lab-scale processes and the potential for small-scale optimization to reduce the environmental impacts. Full article
(This article belongs to the Special Issue Recent Progress on Lignocellulosic-Based Polymeric Materials)
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