Article
Materials Science, Paper & Wood
Katarzyna Kurkowiak, David Hentges, Stephane Dumarcay, Philippe Gerardin, Holger Militz
Summary: In recent years, a wood treatment system based on sorbitol and citric acid (SorCA) has emerged as a promising alternative to already commercialized modification processes of European-grown wood species. This study used different analytical chemistry methods to explain the interaction between SorCA and wood, confirming the crucial role of curing temperature in achieving desired fixation, and determining the contribution of high molecular-weight SorCA polyesters and increased esterification rate of wood polymers.
WOOD MATERIAL SCIENCE & ENGINEERING
(2023)
Review
Materials Science, Paper & Wood
Katarzyna Kurkowiak, Lukas Emmerich, Holger Militz
Summary: Novel approaches for non-toxic protection of timber, such as wood modification using citric acid and bio-based polyols, offer promising opportunities for improving wood properties from renewable resources. However, further optimization of the treatment process is needed for industrial scale implementation.
WOOD MATERIAL SCIENCE & ENGINEERING
(2022)
Article
Polymer Science
Goran Mihulja, Vjekoslav Zivkovic, Dominik Poljak, Bogoslav Sefc, Tomislav Sedlar
Summary: In this study, beech wood was chemically modified with citric acid and sodium hypophosphate as catalyst and subjected to thermo-condensation. The bond strength and adhesive properties were tested using polyvinyl acetate (PVAC) glue. Results showed that modification with citric acid negatively affected the adhesive properties of beech wood, leading to a reduction in bond strength compared to unmodified wood. Further studies with different types of adhesives are needed to assess the suitability of modified wood for bonding applications.
Article
Construction & Building Technology
Jiaojiao Yang, Huagang Zhang, Tao Yu, Yong Zheng, Keke Sun
Summary: The study investigates the effects of adding modifiers, including citric acid, tartaric acid, sodium hexametaphosphate, sodium phosphate, and ethylene-vinyl acetate copolymer emulsion, to the sawdust-magnesium oxychloride cement composite (SMOCC). The results show that these modifiers delay the setting time, improve water resistance, and enhance the microstructure and hydration mechanism of SMOCC. However, EVA decreases the strength of SMOCC and has no significant effect on water resistance improvement.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Youming Dong, Qiuxia Xue, Zhenyu Fu, Yutao Yan, Yun Lu, Yuanqiang Liu, Jianzhang Li
Summary: In this study, phosphorylated sucrose stearate (SUP) was synthesized and used to modify poplar wood with citric acid (CA) to improve its fire resistance. The addition of SUP in the CA-treated wood significantly reduced the heat release rate and smoke production rate, making it a sustainable and efficient method for preparing high-quality wood.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Agricultural Engineering
Ebru Sarioglu, Emine A. Turhan, Selcan Karaz, Basak Bengu, Aziz Bicer, Tugay Yarici, Can Erkey, Erkan Senses
Summary: In this study, a two-step wood surface modification strategy based on microwave heating and UV crosslinking was demonstrated. The fibers were reacted with methacrylic anhydride to create methacrylated groups, facilitating covalent bonding between the fibers. The chemical cross-linking greatly improved the bonding between fibers even in wet conditions, resulting in enhanced mechanical properties and dimensional stability of the wood composites.
INDUSTRIAL CROPS AND PRODUCTS
(2023)
Review
Food Science & Technology
Ming Zhang, Hongyu Jia, Bin Wang, Chao Ma, Fatao He, Qi Fan, Wei Liu
Summary: Citric acid (CA) treatment is a convenient and environmentally friendly method to modify starch, and this paper summarized the effects of CA modification on various properties of starch. The review also discussed the current application status and future development trends of CA modified starch, highlighting its importance for targeted utilization.
Article
Agriculture, Multidisciplinary
Jashanveer Kaur, Anjan Borah, Hemanta Chutia, Prerna Gupta
Summary: This study demonstrates the significant impact of extraction temperature and extraction time on starch yield. Modified starch with improved physicochemical and functional properties can be used as a versatile source of starch in various food and non-food sectors.
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
(2023)
Article
Engineering, Environmental
Rania Farouq, Yehia Selim
Summary: In this study, two catalysts based on polyethylene glycol (PEG) containing sulfonic acid group and the -COOH group of citric acid (CA) were synthesized. Characterization of the catalysts was done using FT-IR. The catalytic efficiency of PEG-SO3H and PEG-CA in the eco-friendly synthesis of methyl salicylate via esterification was investigated. PEG-SO3H showed higher catalytic activity compared to H2SO4 and PEG-CA. The IEC of PEG-SO3H was 4 meq/g and the maximum water uptake was 8.25%.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2023)
Article
Chemistry, Physical
Prabu Satria Sejati, Firmin Obounou Akong, Frederic Fradet, Philippe Gerardin
Summary: In this study, the reactivity of wood with different fatty acids of varying chain lengths was investigated using trifluoroacetic anhydride as the catalyst. The results showed that the esterification reaction of fatty acids in a solvent-free environment had a higher weight percentage gain and ester content. The reaction could be effectively performed at room temperature, but higher reaction temperatures led to wood degradation.
Article
Environmental Sciences
Minh Trang Hoang, Tien Duc Pham, Thi Thuy Pham, Manh Khai Nguyen, Dang Thi To Nu, Thi Hanh Nguyen, Stephan Bartling, Bart Van der Bruggen
Summary: This study investigated the impact of different pretreatment strategies on sugarcane bagasse before citric acid modification in terms of Pb2+ adsorption capacity. It was found that pretreatment with ethanol and 0.01 M NaOH achieved high adsorption capacity, while pretreatment with 0.5 M NaOH and 0.1 M HCl led to lower adsorption capacity. Various analytical techniques were used to confirm the esterification between bagasse and citric acid, and the adsorption mechanism was well described by the pseudo-second-order model.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Biochemistry & Molecular Biology
Jae Young Park, Eun Young Park
Summary: Normal corn starch was modified by dry heating with phytic acid (PA) and citric acid (CA). Dual treatment with PA and CA induced structural and physico-chemical changes in the starch. The degree of phosphorylation and citration resulted in different properties of the treated starch.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Polymer Science
Daisuke Ando, Kenji Umemura
Summary: Citric acid-based wood adhesive shows esterification reactions with cellulose, galactoglucomannan, and specific substructures within lignin on wood. During molding, glycosidic bonds in hemicelluloses are cleaved.
Article
Materials Science, Multidisciplinary
Jesslyn K. E. Tan, N. Birbilis, S. Choudhary, S. Thomas, P. Balan
Summary: A composite coating of Mg-Fe LDH intercalated with 8-hydroxyquinoline (8HQ) and modified with citric acid (CA) is fabricated on Mg alloy WE43 through a combination of electrodeposition, hydrothermal process, and anion-exchange. The CA coating provides physical and chemical shielding to the MgFe LDH film, while intercalation of 8HQ enhances corrosion resistance by hindering dissolution reactions. The MgFe-8HQ LDH/0.05CA coating exhibits potential self-healing properties, making it a promising candidate for biomedical implant applications based on a 7-day EIS study.
Article
Food Science & Technology
Chengpeng Zhong, Yong Xiong, Huixin Lu, Shunjing Luo, Jianyong Wu, Jiangping Ye, Chengmei Liu
Summary: The study successfully synthesized starch citrates by superheated steam treatment, maintaining the granule structure of starch. Esterification with citric acid increased resistant starch content, changed physicochemical properties of rice starch, and disrupted molecular order. This method shows potential as an alternative approach for producing starch citrate compared to conventional hot air treatment.
LWT-FOOD SCIENCE AND TECHNOLOGY
(2022)
Article
Forestry
Norwahyuni Mohd Yusof, Lee Seng Hua, Paridah Md Tahir, Redzuan Mohammad Suffian James, Syeed Saifulazry Osman Al-Edrus, Rasdianah Dahali, Adlin Sabrina Muhammad Roseley, Widya Fatriasari, Lubos Kristak, Muhammad Adly Rahandi Lubis, Roman Reh
Summary: The study investigated the effects of boric acid treatment on the physical, mechanical, adhesion, and morphological properties of bamboo strips. It found that the treatment had varying degrees of effect on different species of bamboo, but it provided several benefits including increased wettability, dimensional stability, and mechanical strength for bamboo strips intended for lamination.
Article
Chemistry, Multidisciplinary
Wan Nur Shasha Najiha Zainal Abidin, Syeed SaifulAzry Osman Al-Edrus, Lee Seng Hua, Muhammad Aizat Abdul Ghani, Balkis Fatomer A. Bakar, Ridzuan Ishak, Fadhlin Qayyum Ahmad Faisal, Fatimah Athiyah Sabaruddin, Lubos Kristak, Muhammad Adly Rahandi Lubis, Roman Reh, Salim Hiziroglu
Summary: In this study, laminated bamboo mat boards with five, seven, and nine plies were fabricated using G. scortechinii from Malaysia and evaluated for their physico-mechanical properties, formaldehyde emission, and flammability. The results showed that as the number of ply increased, the density of the laminated boards decreased. The 5-ply boards had the highest modulus of elasticity but the lowest modulus of rupture. The 5-ply and 7-ply boards exhibited better shear strength than the 9-ply boards. The 7-ply boards also showed the highest dimensional stability and all composites were classified as V-0 due to their flame retardant properties.
APPLIED SCIENCES-BASEL
(2023)
Article
Food Science & Technology
Hamidreza Pirayesh, Byung-Dae Park, Hossein Khanjanzadeh, Hye-Jin Park, Young-Je Cho
Summary: This study aims to develop green sustainable TEMPO-oxidized cellulose nanofibril (TOCNF)-based smart hydrogels triggered with different crosslinkers and anthocyanins (ACNs) from different sources for monitoring pork freshness. The cheap and environmentally friendly CFIs developed in this study could detect the pork warning stage and the medium fresh stages both qualitatively and quantitatively. The non-linear response of the CFIs to ammonia could indicate their potential to differentiate TVB-N mixtures contributing to the meat spoilage process.
Article
Forestry
Ahmet Can, Seng Hua Lee, Petar Antov, Muhammad Aizat Abd Ghani
Summary: This study investigated the effects of three different commercial phase change materials on Oriental spruce wood, and found that the materials demonstrated low performance in terms of storing and releasing heat. Additionally, the phase change materials were resistant to wood-destroying fungi, but further large-scale pilot studies are needed.
Article
Forestry
Rasdianah Dahali, Seng Hua Lee, Paridah Md Tahir, Sabiha Salim, Muhammad Syahmi Hishamuddin, Atikah Che Ismail, Pui San Khoo, Tomasz Krystofiak, Petar Antov
Summary: This study investigated the effects of stem canker disease caused by Chrysoporthe deuterocubensis on the chemical properties and durability of a Eucalyptus hybrid (E. urophylla x E. grandis). Chemical analysis and Fourier transform infrared spectroscopy (FTIR) analysis were used to evaluate the changes in chemical properties. The results showed that infected wood had lower cellulose and hemicellulose content, but higher lignin and extractives content. The infected wood exhibited better resistance against fungi and termites, resulting in improved durability.
Editorial Material
Forestry
Petar Antov, Seng Hua Lee, Muhammad Adly Rahandi Lubis, Lubos Kristak, Roman Reh
Article
Polymer Science
Ismawati Palle, Valeritta Lodin, Ag Ahmad Mohd Yunus, Seng Hua Lee, Paridah Md Tahir, Naruhito Hori, Petar Antov, Akio Takemura
Summary: The compatibility between isocyanate and polyol is crucial for the performance of polyurethane products. This study investigated the impact of ratios between pMDI and Acacia mangium liquefied wood polyol on the properties of polyurethane films. The results showed that higher NCO/OH ratios increased the degradation temperature and glass transition temperature of the films. The formation of urethane bonds between pMDI and polyol improved the rigidity of the films.
Article
Polymer Science
Kah Yen Lim, Tengku Arisyah Tengku Yasim-Anuar, Nur Sharmila Sharip, Farhana Aziz Ujang, Hazwani Husin, Hidayah Ariffin, Paridah Md Tahir, Xinping Li, Seng Hua Lee, Mohd Termizi Yusof
Summary: This study aims to produce environmental-friendly phenol-formaldehyde resin by using phenolated lignin and bio-oil extracted from oil palm empty fruit bunch black liquor to substitute phenol. The modified resins were prepared by heating a mixture of phenol-phenol substitute with NaOH and formaldehyde solution, and the physical properties of the resins were tested. Results showed that the substitution of 5% phenolated lignin improved the properties of phenol-formaldehyde resin. The production process of phenolated lignin-phenol-formaldehyde resin was also environmentally beneficial.
Article
Polymer Science
Manggar Arum Aristri, Rita Kartika Sari, Muhammad Adly Rahandi Lubis, Raden Permana Budi Laksana, Petar Antov, Apri Heri Iswanto, Efri Mardawati, Seng Hua Lee, Viktor Savov, Lubos Kristak, Antonios N. Papadopoulos
Summary: This study developed tannin-based non-isocyanate polyurethane (tannin-Bio-NIPU) and tannin-based polyurethane (tannin-Bio-PU) resins for the impregnation of ramie fibers and investigated their mechanical and thermal properties. The impregnation process improved the thermal stability and mechanical strength of the ramie fibers.
Article
Materials Science, Composites
Ratih Afrida Lismana Sari, Muhammad Adly Rahandi Lubis, Rita Kartika Sari, Lubos Kristak, Apri Heri Iswanto, Efri Mardawati, Widya Fatriasari, Seng Hua Lee, Roman Reh, Jan Sedliacik, Muhammad Iqbal Maulana, Lisman Suryanegara, Bambang Subiyanto, Sena Maulana
Summary: This study developed a cold-setting adhesive based on polyvinyl alcohol (P), tannin (T), and hexamine (H), which, when combined with the cold-pressing process, can produce eco-friendly plywood panels that meet Japanese standard strength requirements.
JOURNAL OF COMPOSITES SCIENCE
(2023)
Article
Biochemistry & Molecular Biology
Yun Yeong Choi, Mi Jin Jang, Byung-Dae Park, In Chul Um
Summary: Five different nonwoven silk fabrics were fabricated using silk fibers from different cocoon layers to examine the effect of the cocoon layer on their structural characteristics and properties. The diameter of silk fiber and thickness of the nonwoven silk fabric decreased from the outer to inner cocoon layer. The properties of the nonwoven silk fabric, including crystallinity, contact angle, yellowness index, moisture retention, and mechanical properties, varied depending on the cocoon layer.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Chemistry, Physical
Vincentius Yolanda Angger Raditya, Muhammad Adly Rahandi Lubis, Rita Kartika Sari, Petar Antov, Seng Hua Lee, Lubos Kristak, Efri Mardawati, Apri Heri Iswanto
Summary: The textile industries are in need of an alternative raw material to cotton due to its inability to meet the growing global demand. This study investigated the characteristics of lignin derived from black liquor of kraft pulping and developed a lignin-based non-isocyanate-polyurethane (L-NIPU) for impregnating ramie fiber. The results showed that ramie fiber impregnated with L-NIPU exhibited improved mechanical properties and weight percent gain compared to non-impregnated ramie fiber.
Review
Polymer Science
Apri Heri Iswanto, Muhammad Adly Rahandi Lubis, Jajang Sutiawan, Syeed Saifulazry Osman Al-Edrus, Seng Hua Lee, Petar Antov, Lubos Kristak, Roman Reh, Efri Mardawati, Adi Santoso, Sukma Surya Kusumah
Summary: The depletion of natural resources and environmental concerns have led to the development of bio-based non-isocyanate polyurethane (NIPU) resins as sustainable substitutes for harmful isocyanates in the manufacturing of polyurethanes. This review provides a comprehensive analysis of the progress made in utilizing lignin and tannin to produce high-performance NIPU resins for wood adhesive applications. Studies have shown that NIPUs derived from lignin and tannin exhibit enhanced mechanical properties, decreased curing temperatures, and are devoid of isocyanates, making them promising alternatives for wood adhesives.
Article
Materials Science, Multidisciplinary
Viktor Savov, Petar Antov, Christian Panchev, Muhammad Adly Rahandi Lubis, Seng Hua Lee, Hamid R. Taghiyari, Martina Todorova, Stoyko Petrin
Summary: Unlike particleboards, the recycling of medium-density fiberboards (MDF) is not widespread, leading to landfilling or incineration. This research focuses on studying the effect of hydrolysis regime on the properties of recycled MDF fibers. The results show that the hydrolysis process does not significantly affect the elemental composition of the fibers. Rating: 8 out of 10.
Article
Ecology
Elvara Windra Madyaratri, Muhammad Rasyidur Ridho, Apri Heri Iswanto, Linda Makovicka Osvaldova, Seng Hua Lee, Petar Antov, Widya Fatriasari
Summary: This research investigated the effect of adding technical lignin on particleboard properties from areca bonded with ultra-low-emitting urea formaldehyde (UF) resin. The results showed that the highest density was achieved with the use of UF resin and kraft lignin with three washing treatments, while the highest MOR and MOE values were obtained with lignosulfonate with five washing treatments.
