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Recent Advances in Wood Chemistry
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Recent Advances in Wood Chemistry

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

Deadline for manuscript submissions: closed (31 March 2025) | Viewed by 9280

Special Issue Editors

Prof. Dr. Sung Phil Mun

E-Mail Website
Guest Editor
Department of Wood Science & Technology, Jeonbuk National University, Jeonju 54896, Jeonbuk, Republic of Korea
Interests: lignin chemistry; carbohydrate chemistry; wood extractives; carbon nanomaterials; wood-based biocomposites
Special Issues, Collections and Topics in MDPI journals
Dr. M. Sarwar Jahan

E-Mail Website
Guest Editor
Pulp and Paper Research Division, Bangladesh Council of Scientific and Industrial Research, Dr. Qudrat-i-Khuda Road, Dhaka 1205, Bangladesh
Interests: pulping; papermaking; wood chemistry; biorefinery; forest products

Special Issue Information

Dear Colleagues,

It is our great pleasure to invite you to submit a manuscript for a Special Issue of Molecules, entitled “Recent Advances in Wood Chemistry”.

The rapid and progressive growth of the global sustainability market is anticipated to expand further in the future. In the era of carbon neutrality, wood and its applications are expected to play a major role. Knowledge on the chemistry of wood can make us understand better the physico-mechanical properties of wood and guide us towards its practical applications.

This Special Issue focuses on recent advances and emerging applications in the field of wood chemistry, which includes topics of cell wall polymers (cellulose, hemicellulose, and lignin), extractives (terpenes, tannins, oil), and bark (polyphenols) chemistry. Original articles and reviews regarding the chemical modifications of these wood components are welcome. With this Special Issue, we aim to help scientists and researchers recognize the potential of these environmentally friendly materials.

Prof. Dr. Sung Phil Mun
Dr. M. Sarwar Jahan
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. Molecules is an international peer-reviewed open access semimonthly 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 2700 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 chemistry
  • lignin
  • cellulose
  • bark
  • wood extractives
  • wood surface modification

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Published Papers (4 papers)

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Research

13 pages, 1774 KiB  
Article
Surface Functionalization of Bamboo via Photo-Grafting Tannic Acid for Enhanced Silver Ion Loading Properties
by Juan Xu, Lanxiang Liu, Jinju Ma, Baoshan Tang, Zhengjun Shi and Hong Zhang
Molecules 2024, 29(13), 3203; https://doi.org/10.3390/molecules29133203 - 5 Jul 2024
Viewed by 1002
Abstract
Photo-grafting is a gentle, simple, and precise approach to incorporating specific functional molecules for the surface functionalization of substrates. In this work, ultraviolet (UV)-induced tannic acid (TA) grafting onto the surface of bamboo was proposed as a viable strategy for functionalizing bamboo. X-ray [...] Read more.
Photo-grafting is a gentle, simple, and precise approach to incorporating specific functional molecules for the surface functionalization of substrates. In this work, ultraviolet (UV)-induced tannic acid (TA) grafting onto the surface of bamboo was proposed as a viable strategy for functionalizing bamboo. X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FTIR) clearly indicated that TA was successfully introduced to the bamboo’s surface. The optimal conditions for the grafting reaction were determined to be 15 mM Methyl-2-benzoylbenzoate (BB), 30 mM TA, 20 min, and a pH = 8. Under these conditions, the amount of TA grafted onto the bamboo’s surface was measured to be 19.98 μg/cm2. Results from Inductively Coupled Plasma (ICP) and Energy Dispersive Spectrometer (EDS) analyses showed that the silver ion loading capacity of tannic acid-grafted bamboo was significantly improved compared to that of raw bamboo and tannic acid-impregnated bamboo. Furthermore, the presence of TA grafted on the bamboo’s surface exhibited a positive correlation with the loading of silver ions, indicating that grafted TA plays an important role in the surface functionalization of bamboo. We believe that photo-grafted TA may help generate multifunctional bamboo with diverse properties. Full article
(This article belongs to the Special Issue Recent Advances in Wood Chemistry)
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18 pages, 5198 KiB  
Article
Chemical and Thermal Characteristics of Ion-Exchanged Lignosulfonate
by Eko Setio Wibowo and Byung-Dae Park
Molecules 2023, 28(6), 2755; https://doi.org/10.3390/molecules28062755 - 18 Mar 2023
Cited by 17 | Viewed by 3880
Abstract
Lignosulfonate features sulfonate groups, which makes it soluble in water and hence, suitable for a wide range of applications. However, its characterization is challenging because of its limited solubility in organic solvents. Thus, this study investigated the chemical and thermal characteristics of ion-exchanged [...] Read more.
Lignosulfonate features sulfonate groups, which makes it soluble in water and hence, suitable for a wide range of applications. However, its characterization is challenging because of its limited solubility in organic solvents. Thus, this study investigated the chemical and thermal characteristics of ion-exchanged sodium lignosulfonate (Na-LS) and compared it with those of industrial kraft lignin derived from softwood and hardwood. The results demonstrated that the ion exchange successfully converted Na-LS to lignosulfonic acid (H-LS), as proven by the Fourier-transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and elemental analysis. H-LS has a greater apparent molecular weight than those of Na-LS and softwood and hardwood kraft lignin (SKL and HKL). According to 31P nuclear magnetic resonance (NMR) analysis, H-LS has less phenolic OH than SKL and HKL, indicating that it has more polymeric chains. Furthermore, H-LS has substantially more native side chains, such as β-O-4 units, than SKL and HKL. Thermal analysis revealed that H-LS has a greater glass temperature (Tg) than SKL and HKL, although Na-LS has a lower Tg than SKL and HKL. In addition, H-LS degraded faster than Na-LS did because the acid condition accelerated degradation reaction. Full article
(This article belongs to the Special Issue Recent Advances in Wood Chemistry)
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15 pages, 5082 KiB  
Article
Influence of Natural Aging on the Moisture Sorption Behaviour of Wooden Structural Components
by Liuyang Han, Guanglan Xi, Wei Dai, Qun Zhou, Suqin Sun, Xiangna Han and Hong Guo
Molecules 2023, 28(4), 1946; https://doi.org/10.3390/molecules28041946 - 17 Feb 2023
Cited by 15 | Viewed by 2150
Abstract
A greater understanding of moisture sorption behaviour of aged wooden structural components, which has a close relationship with dimensional stability, is required to effectively evaluate and preserve historical artefacts. This study focused on the effects of aging on Baotou beam samples from a [...] Read more.
A greater understanding of moisture sorption behaviour of aged wooden structural components, which has a close relationship with dimensional stability, is required to effectively evaluate and preserve historical artefacts. This study focused on the effects of aging on Baotou beam samples from a Chinese historical wooden building. An analysis of the sorption isotherms and hysteresis loops of a naturally aged, decayed sample (AOS), an aged sound sample (AIS), and a reference sample (RS), using classical sorption isotherm models revealed that the moisture sorption behaviour of samples from the same growth ring in a Baotou beam can differ significantly. AOS showed higher hygroscopicity than AIS, and both these samples were more hygroscopic than RS. Furthermore, the mono/multilayer moisture contents of AOS were always higher than those of AIS and RS. In addition, Fourier transform infrared, second-derivative infrared, and two-dimensional correlation infrared spectroscopy were used to investigate chemical changes in the samples. The relative hemicellulose and lignin contents of the samples changed significantly with wood aging. Furthermore, AOS exhibited the highest calcium oxalate content, which may be associated with fungal infections. Overall, these results provide valuable insights into the effects of aging on wood samples and the dimensional stability of timber structures, which could inform future research on methods for the preservation or restoration of aging timber structures. Full article
(This article belongs to the Special Issue Recent Advances in Wood Chemistry)
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15 pages, 3372 KiB  
Article
Hydroxypropylation of Polyphenol-Rich Alkaline Extracts from Pinus radiata Bark and Their Physicochemical Properties
by Sung Phil Mun
Molecules 2022, 27(24), 9002; https://doi.org/10.3390/molecules27249002 - 17 Dec 2022
Cited by 1 | Viewed by 1407
Abstract
Pinus radiata bark is a rich source of polyphenols, which are mainly composed of proanthocyanidins. This study aimed to utilize P. radiata bark as a polyol source for bio-foam production in the future. Polyphenol-rich alkaline extracts (AEs) from P. radiata bark were prepared [...] Read more.
Pinus radiata bark is a rich source of polyphenols, which are mainly composed of proanthocyanidins. This study aimed to utilize P. radiata bark as a polyol source for bio-foam production in the future. Polyphenol-rich alkaline extracts (AEs) from P. radiata bark were prepared by mild alkaline treatment and then derivatized with propylene oxide (PO). Hydroxypropylated alkaline extracts (HAEs) with varying molar substitutions (MS 0.4–8.0) were characterized by FT-IR, NMR, GPC, TGA, and DSC. The hydroxyl value and solubility in commercial polyols were also determined. The molecular weights of the acetylated HAEs (Ac-HAEs) were found to be 4000 to 4900 Da. Analyses of FT-IR of HAEs and 1H NMR of Ac-HAEs indicated that the aromatic hydroxyl groups were hydroxypropylated and showed an increase in aliphatic hydroxyl group content. The glass transition temperature (Tg) of AE and HAEs were 58 to 60 °C, showing little difference. The hydroxyl value increased as the hydroxypropylation proceeded. Although salts were produced upon neutralization after hydroxypropylation, HAEs still showed suitable solubility in polyether and polyester polyols; HAEs dissolved well in polyether polyol, PEG#400, and solubility reached about 50% (w/w). This indicated that neutralized HAEs could be directly applied to bio-foam production even without removing salts. Full article
(This article belongs to the Special Issue Recent Advances in Wood Chemistry)
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