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Forests
Special Issues
Modification and Property Improvement of Wood- and Bamboo-Based Materials
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Modification and Property Improvement of Wood- and Bamboo-Based Materials

A special issue of Forests (ISSN 1999-4907). This special issue belongs to the section "Wood Science and Forest Products".

Deadline for manuscript submissions: closed (30 September 2023) | Viewed by 4414

Special Issue Editors

Prof. Dr. Yanjun Li

E-Mail Website
Guest Editor
College of Materials Science and Engineering, Nanjing Forestry University, Longpan Road 159, Nanjing 210037, China
Interests: bamboo processing; heat treatment; bamboo-based/-derived composites
Dr. Zhichao Lou

E-Mail Website
Guest Editor
College of Materials Science and Engineering, Nanjing Forestry University, Longpan Road 159, Nanjing 210037, China
Interests: bamboo processing; biomass-based composites; biochar
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Wood and bamboo possess natural carbon fixation abilities. As means of carbon storage, wood/bamboo products and buildings have obvious advantages in terms of environmental benefits. Their important role in energy saving and emission reduction is increasingly relevant to society at large. Compared with traditional daily use, home decoration or structural materials such as steel and concrete, wood/bamboo material owns a lower carbon emission factor, meaning that the carbon emissions are low during production, transportation, construction, operation and demolition stages. Promoting the development of wood/bamboo processing (modification and property improvement) according to local conditions is of great practical significance in the exploration of the potential application fields of wood/bamboo products and in reducing energy consumption and carbon emissions.

With the goal of highlighting recent advances in wood/bamboo modification or processing technologies, this Special Issue will publish original research work or forward-looking literature reviews that focus on exploring wood/bamboo modification technologies and understanding the corresponding mechanisms of property improvement. These areas include but are not limited to physical and chemical modification technologies involving new means of heat, light, electricity, sound, magnetism, biology and nanotechnology. We invite related works on advanced modified techniques and their practical applications in the above areas.

Prof. Dr. Yanjun Li
Dr. Zhichao Lou
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Forests is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • wood
  • bamboo
  • biomass
  • modification technology
  • property enhancement
  • heat treatment
  • mechanical property
  • composite

Published Papers (3 papers)

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Research

13 pages, 2631 KiB  
Article
Study on the Effect of Acrylic Acid Emulsion on the Properties of Poplar Wood Modified by Sodium Silicate Impregnation
by Yuan Zhang, Pengfei Guan, Xin Ma, Ping Li, Zhenyu Sun, Xianjun Li and Yingfeng Zuo
Forests 2023, 14(6), 1221; https://doi.org/10.3390/f14061221 - 13 Jun 2023
Cited by 1 | Viewed by 1340
Abstract
Inorganic silicate impregnation-modified fast-growing wood shows improved mechanical properties and thermal stability, but inorganic silicate agent loss and moisture absorption affect its processability. This study proposes a method to improve the impregnating agent loss and modified wood moisture absorption of poplar wood modified [...] Read more.
Inorganic silicate impregnation-modified fast-growing wood shows improved mechanical properties and thermal stability, but inorganic silicate agent loss and moisture absorption affect its processability. This study proposes a method to improve the impregnating agent loss and modified wood moisture absorption of poplar wood modified by using an acrylic acid emulsion/sodium silicate composite. The acrylic acid emulsion coated the sodium silicate and cell wall surfaces with a cured film that blocked water molecules from entering the modified wood. The acrylic acid emulsion adhered to the wood and sodium silicate, thus reducing impregnating agent loss. The addition of the acrylic acid emulsion maintained the excellent mechanical properties of sodium silicate-modified poplar wood and greatly improved its bending strength. The water absorption and moisture swelling rate were significantly decreased, and the dimensional stability of modified poplar wood was more than 50% higher than that of unmodified poplar wood. The thermogravimetric analysis (TG)results showed that the addition of organic components reduced the heat resistance of modified wood, but the thermal stability was still higher than unmodified wood. Fourier-transform infrared (FTIR) spectroscopy and X-ray photoelectron spectroscopy (XPS) results showed that acrylic esters in acrylic acid emulsion reacted with hydroxyl groups on sodium silicate and wood to form covalent bonds that improved the impregnating agent’s resistance to loss and reduced the moisture absorption of the wood. The modified poplar wood showed better dimensional stability and water resistance. Full article
(This article belongs to the Special Issue Modification and Property Improvement of Wood- and Bamboo-Based Materials)
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14 pages, 3620 KiB  
Article
Study on the Effect of Flattening Modification on Bamboo Cutting Board and Corresponding Carbon Footprint Evaluation
by Yihan Zhao, Yan Ma, Zhichao Lou and Yanjun Li
Forests 2023, 14(4), 809; https://doi.org/10.3390/f14040809 - 14 Apr 2023
Cited by 6 | Viewed by 1574
Abstract
Bamboo, as a renewable biomass material, has received wide public attention. However, due to the thin-walled and hollow structure of bamboo, the mainstream processing method is complex and requires splitting the bamboo into narrow strips and then gluing them together for further manufacturing [...] Read more.
Bamboo, as a renewable biomass material, has received wide public attention. However, due to the thin-walled and hollow structure of bamboo, the mainstream processing method is complex and requires splitting the bamboo into narrow strips and then gluing them together for further manufacturing products. In addition, the surface glue residue makes the safety of indoor applications a concern, especially for cutting boards that come into contact with food. In response to the above problems, this paper introduces a bamboo flattening technology, which can flatten and unfold the pre-treated bamboo into a large-size flattened bamboo board (FBB). The results show that, compared to untreated bamboo, the dimensional stability of the FBB was improved and the flexural strength and elastic modulus of the FBB were increased by about 8.0%. The flattened bamboo cutting board was manufactured with the FBB as the surface layer and had a moisture content and hardness value of 9.2% and 5080 N, respectively, and the accumulated dip peel length of any glue layer was less than 25 mm. The flattened bamboo cutting board is proved to be a carbon-neutral product with a carbon footprint value of −42.92 kg CO2/t. This work provides a theoretical basis for the fabrication of large-size unspliced bamboo boards and provides new ideas for the scenario-specific application of FBBs. Using a FBB to make cutting boards can avoid contact between food and adhesives, making them more hygienic. The findings of this research can be used to make bamboo cutting boards more hygienic, environmentally friendly and possess excellent physical and mechanical properties. Full article
(This article belongs to the Special Issue Modification and Property Improvement of Wood- and Bamboo-Based Materials)
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17 pages, 9498 KiB  
Article
The Optimization of Thermo-Mechanical Densification to Improve the Water Resistance of Outdoor Bamboo Scrimber
by Xiaoxia Wang, Rongxian Zhu, Wencheng Lei, Qiupeng Su and Wenji Yu
Forests 2023, 14(4), 749; https://doi.org/10.3390/f14040749 - 6 Apr 2023
Cited by 2 | Viewed by 1163
Abstract
The water resistance of bamboo scrimber used in outdoor environments greatly affects its applications and lifecycle. Physical and chemical studies have been conducted to investigate the influence of the hot-pressing temperature during thermo-mechanical densification on the water resistance of outdoor bamboo scrimber. Investigated [...] Read more.
The water resistance of bamboo scrimber used in outdoor environments greatly affects its applications and lifecycle. Physical and chemical studies have been conducted to investigate the influence of the hot-pressing temperature during thermo-mechanical densification on the water resistance of outdoor bamboo scrimber. Investigated parameters included the failure mode of surfaces, the vertical density profile, and the change of chemical components, which provides theoretical support for optimizing bamboo scrimber for outdoor applications. Here, the vertical density profiles of bamboo scrimber were measured using an X-ray density profiler, and the response of cells and bonding interfaces of bamboo scrimber to water absorption were recorded by using extended depth-of-field 3D microscopy and field emission scanning electron microscopy (FE-SEM). The composition was evaluated by X-ray diffraction (XRD), Fourier-transform infrared (FT-IR) spectroscopy, and X-ray photoelectron spectroscopy (XPS) to investigate the effect of temperature on water resistance during thermo-mechanical densification. The water resistance of bamboo scrimber significantly improved as the temperature increased from 140 °C to 170 °C. The spring-back from the compressive deformation of cells and cracks was the main failure mode, and showed a negative correlation upon increasing the temperature. The moderate increase in cellulose crystallinity, the increase in the polymerization degree of the PF resin, and the thermal degradation of hemicelluloses explained the failure behavior of the bamboo scrimber at the molecular level. Full article
(This article belongs to the Special Issue Modification and Property Improvement of Wood- and Bamboo-Based Materials)
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