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Sustainable Molecules and Polymer Composite from Agricultural and Forestry Biomass

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Materials Chemistry".

Deadline for manuscript submissions: closed (31 July 2023) | Viewed by 6391

Special Issue Editors

Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China
Interests: biocomposites; bioenergy
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Guest Editor
School of Textile Science and Engineering, Xi'an Polytechnic University, Xi'an 710048, China
Interests: structure–function textile composites; smart fiber and textile-based self-powered wearable sensors; protective and safety textiles; recycling of waste textiles
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
Henan Province Engineering Research Center for Biomass Value-Added Products, School of Forestry, Henan Agricultural University, Zhengzhou 450002, China
Interests: biochemicals; biocomposites
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Rapid population and economic growth, urbanization, industrialization, and changing socio-economic conditions have led to an increase in the production of agricultural and forestry biomass waste. Agricultural and forestry biomass waste produces a large amount of greenhouse gases and has a significant impact on global warming. Water and soil contamination, the production of unpleasant odors, and the spread of diseases are other noteworthy problems associated with their management. Agroforestry biomass waste management is a serious problem because its safe disposal has environmental, public health, and aesthetic implications. According to two key European directives (1999/31/EC and 2008/98/EC), organic waste needs to be diverted from landfills at a rate of more than 65 percent, and biological waste needs to be separated at source at a level of between 10 percent and up to 50 percent. The high-value processing and utilization of agricultural and forestry biomass wastes can effectively solve resource waste and environmental pollution. Therefore, there is an urgent need for the effective treatment and management of these agricultural and forestry biomass wastes. Hot research topics related to organic solid waste biomaterials and bioenergy production will be presented in this Special Issue, including research progress and challenges of organic solid waste recombination decomposition and organic solid waste treatment. Original research papers of high scientific quality are invited, as well as recent review articles covering, but not limited to, the following topics:

  • The pricing of organic waste and recovery of useful compounds;
  • Waste-based biomaterial production;
  • Waste-based bioactive molecule production;
  • The bioenergy and chemical conversion of agricultural and forestry biomass waste;
  • Future solutions and directions for agroforestry biomass waste treatment.

Dr. Shengbo Ge
Prof. Dr. Wei Fan
Prof. Dr. Wanxi Peng
Guest Editor

Manuscript Submission Information

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Keywords

  • molecules
  • chemistry of materials
  • polymers
  • chemicals
  • polymer composite

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Published Papers (3 papers)

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Research

13 pages, 2682 KiB  
Article
Recycling of Waste Bamboo Biomass and Papermaking Waste Liquid to Synthesize Sodium Lignosulfonate/Chitosan Glue-Free Biocomposite
by Qingzhi Ma, Guiyang Zheng, Jinxuan Jiang, Wei Fan and Shengbo Ge
Molecules 2023, 28(16), 6058; https://doi.org/10.3390/molecules28166058 - 15 Aug 2023
Cited by 1 | Viewed by 2034
Abstract
The development of the paper industry has led to the discharge of a large amount of papermaking waste liquid containing lignosulfonate. These lignin black liquids cause a lot of pollution in nature, which runs counter to the current environmental protection strategy under the [...] Read more.
The development of the paper industry has led to the discharge of a large amount of papermaking waste liquid containing lignosulfonate. These lignin black liquids cause a lot of pollution in nature, which runs counter to the current environmental protection strategy under the global goal. Through the development and use of lignosulfonate in papermaking waste liquid to increase the utilization of harmful substances in waste liquid, we aim to promote waste liquid treatment and reduce environmental pollution. This paper proposes a new strategy to synthesize novel glue-free biocomposites with high-performance interfacial compatibility from papermaking by-product sodium lignosulfonate/chitosan (L/C) and waste bamboo. This L/C bamboo biocomposite material has good mechanical properties and durability, low formaldehyde emissions, a high recovery rate, meets the requirements of wood-based panels, and reduces environmental pollution. This method is low in cost, has the potential for large-scale production, and can effectively reduce the environmental pollution of the paper industry, promoting the recycling of biomass and helping the future manufacture of glue-free panels, which can be widely used in the preparation of bookcase, furniture, floor and so on. Full article
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16 pages, 4389 KiB  
Article
Comparative Study of Chemically Treated Sugarcane and Kevlar Fiber to Develop Brake Resistance Composites
by Vikas Mehta, Naresh Kumar, Ali Algahtani, Vineet Tirth, Tawfiq Al-Mughanam and Kwok-Wing Chau
Molecules 2023, 28(12), 4861; https://doi.org/10.3390/molecules28124861 - 20 Jun 2023
Cited by 3 | Viewed by 1785
Abstract
Recently, much research has revealed the increasing importance of natural fiber in modern applications. Natural fibers are used in many vital sectors like medicine, aerospace and agriculture. The cause of increasing the application of natural fiber in different fields is its eco-friendly behavior [...] Read more.
Recently, much research has revealed the increasing importance of natural fiber in modern applications. Natural fibers are used in many vital sectors like medicine, aerospace and agriculture. The cause of increasing the application of natural fiber in different fields is its eco-friendly behavior and excellent mechanical properties. The study’s primary goal is to increase the usage of environmentally friendly materials. The existing materials used in brake pads are detrimental to humans and the environment. Natural fiber composites have recently been studied and effectively employed in brake pads. However, there has yet to be a comparison investigation of natural fiber and Kevlar-based brake pad composites. Sugarcane, a natural fabric, is employed in the present study to substitute trendy materials like Kevlar and asbestos. The brake pads have been developed with 5–20 wt.% SCF and 5–10 wt.% Kevlar fiber (KF) to make the comparative study. SCF compounds at 5 wt.% outperformed the entire NF composite in coefficient of friction (µ), (%) fade and wear. However, the values of mechanical properties were found to be almost identical. Although it has been observed that, with an increase in the proportion of SCF, the performance also increased in terms of recovery. The thermal stability and wear rate are maximum for 20 wt.% SCF and 10 wt.% KF composites. The comparative study indicated that the Kevlar-based brake pad specimens provide superior outcomes compared to the SCF composite for fade (%), wear performance and coefficient of friction (Δμ). Finally, the worn composite surfaces were examined using a scanning electron microscopy technique to investigate probable wear mechanisms and to comprehend the nature of the generated contact patches/plateaus, which is critical for determining the tribological behavior of the composites. Full article
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13 pages, 3004 KiB  
Article
Facile Synthesis of Hollow Glass Microsphere Filled PDMS Foam Composites with Exceptional Lightweight, Mechanical Flexibility, and Thermal Insulating Property
by Tian-Long Han, Bi-Fan Guo, Guo-Dong Zhang and Long-Cheng Tang
Molecules 2023, 28(6), 2614; https://doi.org/10.3390/molecules28062614 - 13 Mar 2023
Cited by 10 | Viewed by 2176
Abstract
The feature of low-density and thermal insulation properties of polydimethylsiloxane (PDMS) foam is one of the important challenges of the silicone industry seeking to make these products more competitive compared to traditional polymer foams. Herein, we report a green, simple, and low-cost strategy [...] Read more.
The feature of low-density and thermal insulation properties of polydimethylsiloxane (PDMS) foam is one of the important challenges of the silicone industry seeking to make these products more competitive compared to traditional polymer foams. Herein, we report a green, simple, and low-cost strategy for synthesizing ultra-low-density porous silicone composite materials via Si-H cross-linking and foaming chemistry, and the sialylation-modified hollow glass microspheres (m-HM) were used to promote the HM/PDMS compatibility. Typically, the presence of 7.5 wt% m-HM decreases the density of pure foam from 135 mg/cm−3 to 104 mg/cm−3 without affecting the foaming reaction between Si-H and Si-OH and produces a stable porous structure. The optimized m-HM-modified PDMS foam composites showed excellent mechanical flexibility (unchanged maximum stress values at a strain of 70% after 100 compressive cycles) and good thermal insulation (from 150.0 °C to 52.1 °C for the sample with ~20 mm thickness). Our results suggest that the use of hollow microparticles is an effective strategy for fabricating lightweight, mechanically flexible, and thermal insulation PDMS foam composite materials for many potential applications. Full article
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