Article
Materials Science, Paper & Wood
Yulan Jian, Shaowei Lu, Wei Tang, Mingjun Shao, Fuhua San, Hui Wan, Linkun Xie
Summary: The study investigated the modification of Pinus kesiya wood using four different alkyltrichlorosilanes, with the best results achieved when a 0.25% volume ratio of MTCS and OTCS solutions was used, resulting in the highest water contact angle and lowest water uptake.
JOURNAL OF WOOD CHEMISTRY AND TECHNOLOGY
(2022)
Article
Forestry
Pavlo Bekhta, Barbara Lis, Tomasz Krystofiak, Nataliya Bekhta
Summary: This study proposed a new method of preparing wood veneer surfaces through thermal compression instead of sanding, which was found to be as effective as sanding in achieving smooth surfaces. Applying two layers of varnish along with intermediate sanding was also sufficient to obtain a satisfactory finish.
Article
Forestry
Qinglin Yu, Xi Pan, Zhong Yang, Li Zhang, Jingyun Cao
Summary: This study investigated the wood surface roughness, surface free energy, wettability, and bonding quality of water-based acrylic coatings. Different wood species and sandpaper grits were used for testing. The results showed that sanding improved the wettability of wood surfaces. The highest surface free energy was observed in radiata pine sanded with 180 grit. Hardwood exhibited slightly better coating adhesion than softwood. Wettability, indicated by K values, was a good indicator of bonding quality for water-based acrylic coatings.
Article
Chemistry, Physical
Hadi Gholamiyan, Behnam Gholampoor, Reza Hosseinpourpia
Summary: This research investigates the effect of plasma treatment with different gases on the performance of coated wood samples. The results show that plasma treatment significantly improves coating adhesion and abrasion resistance, and increases the weather resistance of the wood. The performances of waterborne and solvent-borne coatings on plasma-treated wood are comparable.
Article
Materials Science, Paper & Wood
Lincoln Audrew Cordeiro, Bruno de Miranda, Mayara Elita Carneiro, Andre Luiz Missio, Umberto Klock, Pedro Henrique Gonzalez de Cademartori
Summary: The finishing quality of wood products depends on the surface and intrinsic properties of the material. Dynamic wettability is a useful tool to understand material behavior related to solid-liquid interactions. In this study, we investigated the wettability of Imbuia, Red oak, and Pine woods before and after sanding. Sanding affected the surface quality, leading to decreased contact angle and increased work of adhesion. Pine and Red oak showed a significant reduction in dynamic contact angle, while Imbuia remained relatively unaffected due to its hydrophobic nature. The results can guide the selection of coatings for these woods based on their wettability characteristics.
MADERAS-CIENCIA Y TECNOLOGIA
(2023)
Article
Chemistry, Physical
Erfan Nezhadghaffar-Borhani, Amin Abdollahi, Hossein Roghani-Mamaqani, Mehdi Salami-Kalajahi
Summary: Polymeric coatings with photo-responsive properties can switch between hydrophobic and hydrophilic states through light irradiation, displaying ultrahydrophobic characteristics. This technology has great potential in the development of smart surfaces.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Chemistry, Applied
Maddalen Puyadena, Idoia Etxeberria, Gurutze Ortega, Oihane Sanz, Amaia Agirre, Agurtzane Mugica, Eider Matxinandiarena, Aitor Barrio, Alba Gonzalez, Lourdes Irusta
Summary: Hydrophobic polyurethane/acrylic hybrid dispersions were obtained for exterior wood coatings by adding melamine as an additive. The addition of melamine improved the transparency, adhesion, and water resistance of the coatings, but did not significantly change the fire behavior of the coatings.
PROGRESS IN ORGANIC COATINGS
(2024)
Article
Chemistry, Applied
Siming Ouyang, Zecheng Lin, Linyang Cao, Yongbo Ding, Liang Shen
Summary: Water-borne alkyd/acrylic hybrid resins with varied maleic anhydride content were synthesized and coatings were prepared for evaluation. The coating with optimum MA content exhibited excellent physical properties and water resistance.
PROGRESS IN ORGANIC COATINGS
(2021)
Article
Chemistry, Analytical
Yingying Dou, Fahong Li, Biao Tang, Guofu Zhou
Summary: This study systematically investigated the surface wettability tuning and aging process of photoresist, revealing differences in surface tuning mechanisms between oxygen plasma treatment and UV/ozone treatment. Oxygen plasma treatment showed a stronger hydrophilic modification effect, while environmental factors were found to affect the aging speed of wettability tuning.
Article
Polymer Science
Mirko Kariz, Dasa Krapez Tomec, Sebastian Dahle, Manja Kitek Kuzman, Milan Sernek, Jure Zigon
Summary: The study investigated the bondability of 3D-printed parts to wood with various surface treatments, finding that plasma treatment significantly improved bond shear strength, with the best results obtained for surfaces that had been both sanded and plasma treated.
Article
Materials Science, Composites
Jiangyuan Wu, Yahui Zhang, Yaohui Ji, Rongxian Zhu, Yuhui Sun, Yanglun Yu, Wenji Yu
Summary: The adhesive ability of bamboo scrimber is crucial for its application in large-scale engineering structures. Cold-pressed bamboo scrimber with different sanding mesh and density was bonded using polyurethane resin. The concentration of adhesive on the surface facilitated anchoring into the material. The study examined shear strength and immersion peel strength as parameters to evaluate glue quality. The optimal gluing characteristics were obtained with 120 grit sandpaper and a density of 1.15 g/cm(3).
POLYMER COMPOSITES
(2022)
Article
Chemistry, Multidisciplinary
Xiaomei Li, Simon Silge, Alexander Saal, Gunnar Kircher, Kaloian Koynov, Ruediger Berger, Hans-Juergen Butt
Summary: Solid surfaces, particularly polymer surfaces, can adapt upon contact with a liquid, affecting the mobility of sliding drops. Water presence leads to surface swelling and enrichment of acid groups, with a short estimated time constant for the adaptation process.
Article
Energy & Fuels
Zu-Sheng Huang, Chaojie Shen, Lanlan Fan, Xiaoxia Ye, Xiangchao Shi, Huaqiong Li, Yijia Zhang, Yuekun Lai, Yun-Yun Quan
Summary: This study investigated the effects of surface roughness and surface energy on reducing dust adhesion on PV panels by preparing coatings with different wettability. It was found that the high surface energy of superhydrophilic coatings played a significant role in resisting dust adhesion, while further reducing surface energy on other coatings had limited impact on improving dust-proof ability. Additionally, large airflow velocity was beneficial for resisting dust adhesion for all types of coatings, but had limited effect on improving the anti-soiling effect of superhydrophilic coating under different tilt angles compared to other three coatings.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2021)
Article
Materials Science, Ceramics
Wisanu Boonrawd, Kamal Awad, Venu Varanasi, Efstathios I. Meletis
Summary: Plasma electrolytic oxidation (PEO) was used to produce titanium oxide (TiO2) coatings, and the morphology, wettability, phase and chemical compositions were analyzed as a function of processing parameters. The bioactivity of the coating was evaluated through in-vitro experiments. The results showed that PEO treatment can generate porous and superhydrophilic TiO2 coatings, promoting cell adhesion and growth.
CERAMICS INTERNATIONAL
(2022)
Article
Forestry
Rami Benkreif, Fatima Zohra Brahmia, Csilla Csiha
Summary: The surface tension of solid wood surfaces affects the wettability and adhesion of various adhesives and wood coatings. This study explores the impact of wood moisture content on contact angle values, finding that increasing moisture content leads to an increase in contact angle (and a decrease in surface tension).
EUROPEAN JOURNAL OF WOOD AND WOOD PRODUCTS
(2021)
Article
Materials Science, Paper & Wood
Mahdi Mubarok, Holger Militz, Stephane Dumarcay, Wayan Darmawan, Yusuf Sudo Hadi, Philippe Gerardin
Summary: This paper investigates the mechanical and biological durability properties of wood modified with vinylic derivatives of glycerol or polyglycerol and maleic anhydride under different curing conditions. While the modified wood generally showed higher modulus of elasticity values, there was a decrease in modulus of rupture and work to maximum load in bending. The modified wood demonstrated good durability against soft-rot and subterranean termites in field tests, especially those treated with polyglycerol maleate/glycerol maleate/maleic anhydride at 20% under OHT 150 degrees C or at 10% under OHT 220 degrees C.
WOOD MATERIAL SCIENCE & ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
Resa Martha, Mahdi Mubarok, Irmanida Batubara, Istie S. Rahayu, Loedy Setiono, Wayan Darmawan, Firmin Obounou Akong, Beatrice George, Christine Gerardin, Philippe Gerardin
Summary: The study aimed to improve the dimensional stability and durability of short rotation teak wood through furfurylation treatment. The results showed an increase in anti-swelling efficiency (ASE) and bulking effect (BE), and a decrease in water uptake (WU), indicating improved dimensional stability. Furfurylated teak woods exhibited high durability against fungal decay, with weight losses placing them in the very durable category.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Paper & Wood
Kidung Tirtayasa Putra Pangestu, Dodi Nandika, Imam Wahyudi, Hiroshi Usuki, Wayan Darmawan
Summary: The study found that helical cutting tools with larger inclination angles have better wear resistance, surface quality, and noise control effects when milling wood-based materials. Edge radius wear, chip flow, surface roughness, and noise level decrease with increasing inclination angle of the cutting tool edge.
WOOD MATERIAL SCIENCE & ENGINEERING
(2022)
Article
Engineering, Chemical
Tekat Dwi Cahyono, Wahyu Dwianto, Wayan Darmawan, Hiroki Sakagami
Summary: The research aimed to detect hydrophobicity change on Samama wood surface post hydro-thermo-mechanical modification. The study found that the sample impregnated with citric acid and compressed for 50 minutes had the smoothest surface and lowest surface free energy value.
JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY
(2022)
Article
Materials Science, Paper & Wood
Resa Martha, Efrida Basri, Loedy Setiono, Irmanida Batubara, Istie S. Rahayu, Philippe Gerardin, Wayan Darmawan
Summary: The study showed that heat treatment of short rotation teak resulted in degradation of hemicellulose, increase in alpha-cellulose and lignin, improved anti-swelling efficiency, but decreased MOE and MOR values. The sample treated at 180 degrees C exhibited the best durability against termite and decay, while the sample treated at 220 degrees C had the poorest wettability.
INTERNATIONAL WOOD PRODUCTS JOURNAL
(2021)
Article
Forestry
Resa Martha, Mahdi Mubarok, Irmanida Batubara, Istie S. Rahayu, Loedy Setiono, Wayan Darmawan, Firmin Obounou Akong, Beatrice George, Christine Gerardin, Philippe Gerardin
Summary: The study found that short rotation teak wood treated with 10% GMA and thermal modification showed significant improvement in dimensional stability and resistance against wood-decaying fungi and termites, especially reaching optimal results at 220 degrees Celsius.
WOOD SCIENCE AND TECHNOLOGY
(2021)
Article
Forestry
Rita Kartika Sari, Yanico Hadi Prayogo, Ratih Afrida Lismana Sari, Nur Asidah, Mohamad Rafi, Ietje Wientarsih, Wayan Darmawan
Summary: Intsia bijuga wood, also known as Merbau in Indonesian, is a commercial wood with high economic value primarily found in Indonesia. The study aimed to select the best extraction solvent and phytosome formulation for I. bijuga heartwood extract for topical antiaging cosmetics, taking into consideration antioxidant, antityrosinase, and sun protection factor (SPF) values. The results showed that 50% ethanol extract and phytosome formulation had promising antiaging properties, making them suitable for development as active ingredients in cosmetics.
Article
Forestry
Istie Rahayu, Fitria Cita Dirna, Akhiruddin Maddu, Wayan Darmawan, Dodi Nandika, Esti Prihatini
Summary: The study evaluated the impregnation treatment on the dimensional stability and density of 5-year-old Sengon wood, showing that the 0.75% MNano-Silica treatment was the most optimal.
Article
Materials Science, Paper & Wood
Irsan Alipraja, Roger E. Hernandez, Claudia B. Caceres, Ahmed Koubaa
Summary: The effects of counter-knife angle and wood temperature on the size distribution of Jack pine strands were studied. It was found that the counter-knife angle and wood temperature affected the proportion of strands, fines, pin chips, and strands' width. The proportion of strands and the mean strand width increased as the counter-knife angle decreased, while the proportion of fines and pin chips decreased. Frozen logs produced narrower strands and more fines and pin chips than unfrozen logs.
Article
Polymer Science
Istie Rahayu, Esti Prihatini, Rohmat Ismail, Wayan Darmawan, Lina Karlinasari, Gilang Dwi Laksono
Summary: Impregnation of jabon wood with Fe solution followed by treatment with either NaOH or NH4OH significantly impacts the density and dimensional stability of the wood. NaOH treatment results in higher polymer weight gain, while NH4OH treatment leads to higher anti-swelling efficiency. The density and bulking effect of the wood increase, with a decrease in water uptake.
Article
Polymer Science
Istie Rahayu, Wayan Darmawan, Deded Sarip Nawawi, Esti Prihatini, Rohmat Ismail, Gilang Dwi Laksono
Summary: This study investigated the effect of TiO2 nanoparticle impregnation on the density and dimensional stability of mangium wood. The results showed that TiO2 nanoparticles increased the density, weight percent gain, and bulking effect of the wood. XRD and FTIR analysis confirmed the successful impregnation of TiO2 nanoparticles into the wood, while SEM-EDX analysis revealed that the nanoparticles covered the surface of the wood cells. TiO2-impregnated mangium wood exhibited higher photocatalytic activity, indicating better protection against UV radiation and pollutants.
Article
Forestry
Efrida Basri, Nisrina Hanifah, Resa Martha, Istie S. Rahayu, Mahdi Mubarok, Wayan Darmawan, Philippe Gerardin
Summary: This study aimed to improve the dimensional stability and biological durability of short rotation teak (SRT) through modification treatment using non-biocide chemicals. Results showed that the treatment significantly increased the anti-swelling efficiency and durability against termites. Observations suggested a possible chemical reaction between the wood components and the chemicals used for modification. The modified woods exhibited high wetting ability against varnish liquids. This treatment can be applied to enhance the quality of SRT for high-quality wood product utilization.
Article
Materials Science, Paper & Wood
Nisrina P. Hanifah, Resa Martha, Istie S. Rahayu, Wayan Darmawan, Beatrice George, Philippe Gerardin
Summary: Chemical and thermal modifications can alter the hydrophilic properties of wood and impact their coating performance. This study examined the surface characteristics of chemically and thermally modified short rotation teak wood, including surface roughness, surface free energy, contact angle, wettability, and coating bonding quality. The results showed that the surface of short rotation teak became smoother after modification, with an increase in roughness after furfurylation. The total surface free energy decreased after chemical and thermal modifications, leading to a decrease in the constant contact angle change rate (K-value) and lower wettability of water-dispersed polyurethane and acrylic paints. The quality of paint bonding also decreased after accelerated weathering, suggesting that Glycerol-Maleic Anhydride (GMA)-thermal treated short rotation teak may be suitable for exterior applications with proper paint selection.
INTERNATIONAL WOOD PRODUCTS JOURNAL
(2023)
Article
Materials Science, Paper & Wood
Andre Novayer, Imam Wahyudi, Loedy Setiono, Wayan Darmawan
Summary: This study compared the performance of conventional and helical router bits in milling teak wood, finding that down-milling resulted in improved surface roughness, lower noise levels, and better chip flow. Higher helix angles in the router bits produced better surface roughness and reduced noise levels. Increasing wood grain angles led to higher surface roughness and noise levels.
INTERNATIONAL WOOD PRODUCTS JOURNAL
(2021)
Article
Materials Science, Paper & Wood
Iis Yuningsih, Istie Sekartining Rahayu, Dumasari Lumongga, Wayan Darmawan
WOOD MATERIAL SCIENCE & ENGINEERING
(2020)