Article
Agricultural Engineering
Mohd Sofian Alias, Norinsan Kamil Othman, Siti Radiah Mohd Kamarudin, Mohd Hamzah Harun, Mahathir Mohamed, Nur Ubaidah Saidin, Siti Fatahiyah Mohamad, Zaifol Samsu
Summary: Replacing petroleum oil with renewable sources in producing polymer coating attracts many researchers. This study developed a palm oil-based urethane acrylate (POBUA) coating using UV irradiation for protecting mild steel. The presence of well-distributed graphite particles in the POBUA matrix enhances the coating's performance and reduces corrosion rate.
INDUSTRIAL CROPS AND PRODUCTS
(2022)
Article
Chemistry, Applied
Yali Xiang, Juan Du, Yan Luo
Summary: New strategies for synthesizing click chemical reactions have been widely used in the synthesis of functional polymers. In this study, a new type of waterborne coating with strong toughness, high hardness, and rapid curing was obtained by introducing thiocarbamate bonds and thioether bonds into the polymer skeleton. The effects of different components on the properties of the coating were investigated, and it was found that films with high hardness, water resistance, and thermal stability could be prepared under specific component content.
JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH
(2023)
Article
Nanoscience & Nanotechnology
Ruifeng Jiang, Yongsheng Li, Shengmao Chao, Yongqian Chen, Hong Shao, Yakun Guo, Xiao Wang, Changyu Tang
Summary: A UV-curable ink with bulk superhydrophobicity was developed for UV-assisted direct write printing. The printed objects exhibited durable superhydrophobicity even after abrasion and liquid corrosion. The ink also enabled the fabrication of self-supporting 3D superhydrophobic objects, presenting promising applications.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Polymer Science
Atasheh Soleimani-Gorgani, Farhood Najafi, Fatemeh Mohammadrezaei, Behzad Shirkavand Hadavand
Summary: This study presents a simple method to prepare water-based UV-curable ink-jet ink based on urethane acrylate, which successfully prints on transparent flexible polyethylene terephthalate substrate. By measuring various properties and print results, the feasibility of the prepared ink is validated.
INTERNATIONAL JOURNAL OF POLYMER ANALYSIS AND CHARACTERIZATION
(2021)
Article
Chemistry, Applied
Debarati Maity, Rahul Tade, Anagha S. Sabnis
Summary: A novel UV-curable hyperbranched polyester-urethane-acrylate (PUA) resin was synthesized using citric acid as the core bio-based material and ester-urethane-acrylate linkage as the arm. The synthesized resin was successfully applied on both wood and metal substrates. The mechanical, chemical, and thermal properties of the coated substrates were investigated and compared to a commercial urethane acrylate (CUA).
JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH
(2023)
Article
Chemistry, Applied
Bingyan Sun, Huimin Wang, Yanchao Fan, Xiaomeng Chu, Shaojie Liu, Song Zhao, Minzhong Zhao
Summary: In this study, a NCO-containing castor oil-based urethane acrylate oligomer with dual curable functions was successfully prepared for UV-induced peelable adhesive in silicon wafer dicing, achieving a peel strength exceeding 20 N/25 mm before UV irradiation and reducing to below 1 N/25 mm after UV exposure. Compared with other reported curing agents, the UV dose required for curing was reduced, and the cross-linking degree of cured adhesive film was increased.
PROGRESS IN ORGANIC COATINGS
(2022)
Article
Engineering, Chemical
Hikaru Sugita, Keisuke Itou, Yoshikazu Itou, Natsuko Wada, Tomikazu Ueno Shin-ya Kurita, Youichi Hirose, Kazuki Hatase, Hitonari Matsumoto, Daigo Ichinohe
Summary: The dismantlable, photo-curable adhesive is composed of a multi-acrylate oligomer, a photo radical initiator, a photo acid generator, and a phosphate-substituted acrylate. It allows for bonding and debonding of glass through photo-exposure induced cross-linking and acid-catalyzed decomposition, facilitating easy transfer of glass plates.
INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES
(2021)
Article
Chemistry, Multidisciplinary
Ying Wang, Shuai Zhang, Yanli Lin, Qianyi Wang, Ying Zhang, Changmei Sun, Rongjun Qu
Summary: In this study, waterborne polyurethane acrylate (WPUA)/MXene nanocomposite films were fabricated using UV-curing technology. The incorporation of MXene led to improvements in the hydrophilicity, tensile strength, elongation at break, and thermal stability of the nanocomposite films.
Article
Chemistry, Applied
Ying Wang, Rongjun Qu, Yuankai Pan, Yuexin Luo, Ying Zhang, Changmei Sun, Chunnuan Ji
Summary: UV-curable epoxy acrylate (EA) nanocomposite films with different amounts of aramid nanofibers (ANFs) were synthesized using a bottom-up method, and their effects on coating properties were investigated. The results showed that ANF incorporation decreased UV transmittance while enhancing mechanical properties, without affecting transparency or final conversion. This study highlights the potential of ANF-reinforced nanocomposites in improving UV-shielding and mechanical properties of EA coatings.
PROGRESS IN ORGANIC COATINGS
(2022)
Article
Polymer Science
Siti Khairunisah Ghazali, Nadia Adrus, Rohah A. Majid, Fathilah Ali, Jamarosliza Jamaluddin
Summary: This study utilized UV-LED technology to design a series of hydrophobic coatings based on urethane acrylate oligomer and fluorinated monomer, achieving high C=C conversion and gel fraction, reducing surface free energy, and enhancing hydrophobicity through migration of fluorine component. However, excessive fluorinated monomer content can lead to decreased transparency of the coating.
Article
Chemistry, Applied
Junchao Fu, Haojie Yu, Li Wang, Ruixue Liang, Chuyin Zhang, Meijin Jin
Summary: By modifying SiO2 nanoparticles with different surface modifiers, the properties of PUA/SiO2 composite coatings can be significantly improved. The Si-PN102-5-5% composite coating shows the highest tensile strength and elongation at break among the prepared coatings.
PROGRESS IN ORGANIC COATINGS
(2021)
Article
Nanoscience & Nanotechnology
Yunying Meng, Jiang Cheng, Cailong Zhou
Summary: A superhydrophobic carbon nanotube/thermoplastic urethane nanocomposite fibrous mat was successfully prepared through a layer-by-layer self-assembly method. This mat showed good hydrophobicity, mechanical stability, remarkable tensile property, and excellent sensing performance, making it suitable for monitoring human health and designing wearable devices.
ACS APPLIED NANO MATERIALS
(2023)
Article
Polymer Science
Ali Gharieh, Amin Abdollahi, Laleh Sohrabi
Summary: Counterfeiting is a growing global problem that poses challenges to companies, governments, and customers. Anticounterfeiting technology and information security have gained significant attention as potential solutions. In this study, Rhodamine B (RhB), a fluorescent material, was modified and used in the formulation of an eco-friendly ink. The ink showed enhanced fluorescence emission upon UV irradiation and has potential applications in encryption, security marking, and optical authentication of confidential cellulose substrates.
POLYMERS FOR ADVANCED TECHNOLOGIES
(2022)
Article
Chemistry, Applied
Ehsan Bakhshandeh, Sarah Sobhani, Celine Croutxe-Barghorn, Xavier Allonas, Saeed Bastani
Summary: The molecular weight of PDMS affects the chemorheology and viscoelastic behavior of Si-WUPAs. High molecular weight PDMS leads to pseudoplastic behavior, while low molecular weight PDMS exhibits Newtonian behavior. The curing process of Si-WUPAs involves three steps under the influence of a photoinitiator, with increased PDMS molecular weight resulting in longer drying time and higher gelation points. The thermomechanical properties of UV-cured Si-WUPAs films show differences based on the molecular weight of PDMS, with higher molecular weight leading to increased incompatibility and non-uniformity due to micro-phase separation of PDMS chains.
PROGRESS IN ORGANIC COATINGS
(2021)
Article
Chemistry, Applied
Yasemin Eren, Ferhat Sen, Suzan Abdurrahmanoglu, Sevim Karatas
Summary: The effect of POSS-vinyl-heptaisobutyl-substituted (POSSV) compounds as an inorganic additive on the thermal and physical properties of nanohybrid coating materials based on urethane acrylate (UA) resin was investigated. The nanohybrid materials obtained from the synthesized UA resin and improved with POSSV additive can be used in the coating industry.
JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH
(2023)
Article
Chemistry, Physical
Erhao Gao, Wenjing Feng, Qi Jin, Li Han, Yi He
Summary: The influence of K-doping on the reactive oxygen species and elementary reactions of HCHO catalytic oxidation was investigated using density functional theory (DFT). The introduction of K-doping changed the electronic structures of Ce and O, facilitating the adsorption and activation of HCHO and O2 molecules, enhancing lattice oxygen mobility, and reducing the energy barrier for HCHO oxidation. K-doping also promoted the formation of hydroxyl groups, facilitating HCHO adsorption and oxidation.
Article
Chemistry, Physical
Hao Fu, Zhangliang Xu
Summary: In this study, the adsorption mechanisms and detection performance of formaldehyde, ammonia, and sulfur dioxide on undoped and metal-doped ZnO surfaces were investigated using density functional theory. The results showed that formaldehyde and ammonia were physically adsorbed on the undoped ZnO surface, while sulfur dioxide was weakly chemisorbed. The adsorption energy was enhanced when ZnO was doped with metals. These findings provide theoretical guidance for the application of ZnO substrate materials in gas sensitivity research.
Article
Chemistry, Physical
Atsushi Nomura, Tohru Kurosawa, Migaku Oda, Satoshi Demura, Shogo Kuwahara, Sora Kobayashi, Hideaki Sakata
Summary: The study investigates the tunneling spectra of 1T-TiSe2 in the CDW state and the dip structure below the Fermi level, aiming to determine whether this dip is a CDW gap. The answer to this question is crucial for understanding the driving mechanism of CDW.
Article
Chemistry, Physical
A. S. Petrov, D. I. Rogilo, A. I. Vergules, V. G. Mansurov, D. V. Sheglov, A. V. Latyshev
Summary: This study investigates Si mass transport and morphological transformations on the Si(111) surface during (root 3 x root 3)-Sn reconstruction formation and Si homoepitaxy. The research shows that the formation of different Sn phases at different temperatures affects the Si island nucleation and monatomic step shift, which in turn impact the morphology of the Sn/Si(111) interface. Electromigration-induced drift of disordered Sn domains leads to enhanced noncompensated Si mass transport and surface roughening.
Article
Chemistry, Physical
D. V. Gruznev, L. V. Bondarenko, A. Y. Tupchaya, A. A. Yakovlev, A. N. Mihalyuk, A. V. Zotov, A. A. Saranin
Summary: Deposition of thallium (Tl) onto the Au/Si(111)5 x 2 reconstruction followed by annealing results in the formation of a surface structure with 4 x 2 periodicity. The immiscibility of Au and Tl leads to the migration of Tl atoms over the Si chains. Thallium donates electrons to the surface, converting the metallic surface into an insulating state and altering the inter-chain distance within the array of Au atomic wires.
Article
Chemistry, Physical
Simone Giusepponi, Francesco Buonocore, Barbara Ferrucci, Massimo Celino
Summary: Using ab-initio calculations, the interaction between lead adatom and both clean and doped iron (100) surfaces was investigated. It was found that the lead adatom prefers to adsorb in the hollow site, which is more stable compared to the top and bridge sites, and in this position, it is energetically favorable over the iron adatom. Moreover, lead adsorbed in the hollow site of the iron (100) surface doped with chromium was found to create a more stable system compared to nickel-doped surfaces with an iron adatom in the same position. The study also explored inter-layer distances, bonding mechanisms, magnetic behaviors, and charge density differences. The results provide insights into the role of doping in the interaction between lead adatom and iron surface, and have implications for the analysis of corrosion processes caused by liquid lead.
Article
Chemistry, Physical
Shuo Zhang, Jin-Ho Choi
Summary: The recent synthesis of two-dimensional layered WSi2N4 has attracted attention due to its potential applications. This study investigates the catalytic performance of WSi2N4 monolayers with nitrogen vacancies in the hydrogen evolution reaction using first-principles calculations. The results show that the defective WSi2N4 monolayers exhibit remarkably high catalytic activity comparable to platinum catalysts. Electronic structure calculations also reveal the emergence of spin-polarized states due to the introduction of nitrogen vacancies.
Article
Chemistry, Physical
Xiaoyan Yu, Xin Cao, Wei Kang, Shanhua Chen, Ao Jiang, Yuhao Luo, Wenwei Deng
Summary: First-principles calculations were used to investigate the electronic properties of a TiO2 heterostructure modified with Bi2Te3 co-catalyst. The study revealed that the Bi2Te3/TiO2 interface introduced optimal band offsets, effectively suppressing electron-hole recombination and enhancing the utilization efficiency of photo-generated carriers. Additionally, the Bi2Te3 co-catalyst introduced extra catalytic active sites, further boosting the photo-catalytic hydrogen evolution efficiency.
Article
Chemistry, Physical
Filippo Longo, Emanuel Billeter, Selim Kazaz, Alessia Cesarini, Marin Nikolic, Aarati Chacko, Patrik Schmutz, Zbynek Novotny, Andreas Borgschulte
Summary: Alkaline water electrolysis is a simple and efficient method for renewable hydrogen production, utilizing cheap and abundant transition metals. The catalytic properties of Ni materials are enhanced by the formation of oxidized compounds on the surface. The high electrocatalytic activity of Ni (oxy)-hydroxides is directly related to water intercalation in the passivation layer, supporting the hypothesis of a water mediated OH- diffusion mechanism. The self-organization of the surface structure during passivation layer formation enables high electrode performance.
Article
Chemistry, Physical
Mohan Kumar Kuntumalla, Miriam Fischer, Alon Hoffman
Summary: By investigating the bonding, retention, and thermal stability of nitrogen in H-Diamond (100), it was found that nitrogen can partially recover its bonding with carbon atoms after high-temperature annealing, indicating a high thermal stability of nitrogen in diamond.
Article
Chemistry, Physical
Dong Yue, Liangying Wen, Rong Chen, Jianxin Wang, Zhongqing Yang
Summary: The adsorption behavior of Cl2 molecules on the TiC surface and the formation and transfer of reaction products were studied using first-principles ab initio calculations. The results show that the Cl atoms bonded to the surface Ti atoms are more stable, and the TiCl3 intermediate is easier to form than the TiCl2 intermediate.
Article
Chemistry, Physical
Yatao Wang, Peng Zhang, Hongjuan Li, Qiuju Xu, Shujun Liu, Xiaopeng Liu, Xuehua Guo, Yitao Li, Jinzhang Liu, Sen Dong, Zhi Wei Seh, Qianfan Zhang
Summary: In this study, the adsorption performance of two types of metal-organic frameworks (MOFs) for thiophene and benzene was experimentally investigated. The results showed that IZE-1 exhibited high selectivity and superior adsorption capacity for thiophene, especially at low concentrations. First-principles calculations and molecular dynamics simulations provided insights into the mechanism of thiophene adsorption and the high selectivity observed. This research demonstrates the potential of MOFs for thiophene adsorption, particularly at high concentrations.