Valorization of Polymers in Wood

A special issue of Polymers (ISSN 2073-4360). This special issue belongs to the section "Polymer Analysis and Characterization".

Deadline for manuscript submissions: 31 March 2025 | Viewed by 609

Special Issue Editors


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Guest Editor
1. Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Jiangsu Province Key Laboratory of Biomass Energy and Materials, Nanjing 210042, China
2. Co-Innovation Center for Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China
Interests: biomass fractionation; lignin characterization; green solvents; bio-based material; enzymatic hydrolysis

E-Mail
Guest Editor
1. Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Jiangsu Province Key Laboratory of Biomass Energy and Materials, Nanjing 210042, China
2. Co-Innovation Center for Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China
Interests: biomass fractionation; lignin characterization; green solvents; bio-based material; enzymatic hydrolysis

Special Issue Information

Dear Colleagues,

Lignocellulose consists of cellulose, hemicellulose and lignin. These components can be upgraded into fuels, chemicals and materials, with the potential of substituting petroleum-based products in part or in whole. Due to their complex hierarchy and chemical structures, technologies aiming to separate their main components in biomasses are desired for obtaining pure cellulose/hemicellulose and high-quality lignin, which are the starting materials used for downstream utilizations. Moreover, the processes responsible for converting lignocellulose into high-value chemical products (sugars, ethanol, phenols, etc.) and high-performance functional materials (film, foam, hydrogel, etc.) in thermochemical or biochemical pathways are focal points of current research and need to be further explored. Therefore, the goal of this Special Issue is to highlight the advanced biorefinery technologies utilized in the conversion of lignocellulose, which is a highly relevant topic for all researchers in the field of biorefinery.

Dr. Chen Huang
Dr. Xuelian Zhou
Guest Editors

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Keywords

  • lignocellulose
  • fractionation
  • biorefinery
  • chemicals
  • materials

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Published Papers (1 paper)

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Research

14 pages, 3079 KiB  
Article
Mechanical Motion and Color Change of Humidity-Responsive Cellulose Nanocrystal Films from Sunflower Pith
by Shujie Wang, Yanan Liu, Zhengkun Tao, Yang Li, Jie Jiang and Ke Zheng
Polymers 2024, 16(22), 3199; https://doi.org/10.3390/polym16223199 - 18 Nov 2024
Viewed by 318
Abstract
Nanocellulose has prompted extensive exploration of its applications in advanced functional materials, especially humidity-responsive materials. However, the sunflower pith (SP), a unique agricultural by-product with high cellulose and pectin content, is always ignored and wasted. This work applied sulfuric acid hydrolysis and sonication [...] Read more.
Nanocellulose has prompted extensive exploration of its applications in advanced functional materials, especially humidity-responsive materials. However, the sunflower pith (SP), a unique agricultural by-product with high cellulose and pectin content, is always ignored and wasted. This work applied sulfuric acid hydrolysis and sonication to sunflower pith to obtain nanocellulose and construct film materials with humidity-responsive properties. The SP nanoparticle (SP-NP) suspension could form a transparent film with stacked layers of laminated structure. Due to the tightly layered structure and expansion confinement effect, when humidity increases, the SP-NP film responds rapidly in just 0.5 s and completes a full flipping cycle in 4 s, demonstrating its excellent humidity-responsive capability. After removing hemicellulose and lignin, the SP cellulose nanocrystals (SPC-NC) could self-assemble into a chiral nematic structure in the film, displaying various structural colors based on different sonication times. The color of the SPC-NC film dynamically adjusted with changes in ambient humidity, exhibiting both functionality and aesthetics. This research provides a new perspective on the high-value utilization of sunflower pith while establishing a practical foundation for developing novel responsive cellulose-based materials. Full article
(This article belongs to the Special Issue Valorization of Polymers in Wood)
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