Article
Chemistry, Applied
Hong Yu, Xiuhua Lin, Guang Xu, Tingrui Yin, Ying Zhang, Jinpeng Liu, Jian Chen, Sixuan Meng, Jia Yuan, Li Dang, Guang-Ao Yu
Summary: We have developed a remote selective C-H bromination method using FeBr3 as a brominating reagent for the synthesis of C4-brominated biarylphosphine oxides. C3-brominated products were obtained with substrates bearing a 2,4,6-triisopropyl substituent on the bottom ring. Additionally, we have developed a direct access to C5-chlorinated peri-substituted (1-naphthalenyl)phosphines using FeCl3 as a chlorinating reagent. These halogenated compounds can be utilized for cross-coupling reactions to construct functionalized phosphine oxides.
ADVANCED SYNTHESIS & CATALYSIS
(2023)
Article
Nanoscience & Nanotechnology
Neil D. Dolinski, E. Benjamin Callaway, Caitlin S. Sample, Luke F. Gockowski, Roberto Chavez, Zachariah A. Page, Fabian Eisenreich, Stefan Hecht, Megan T. Valentine, Frank W. Zok, Craig J. Hawker
Summary: In this study, curing reactions triggered by exposure to different wavelengths of visible light are used to produce multimaterial objects with strong and well-defined interfaces. The improved mechanical strength of these interfaces is hypothesized to come from a continuous acrylate network that bridges domains. This wavelength-selective photocuring of interpenetrating polymer networks is a promising strategy for increasing the mechanical performance of 3D-printed objects.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Review
Biotechnology & Applied Microbiology
M. Artico, C. Roux, F. Peruch, A. -F. Mingotaud, C. Y. Montanier
Summary: This review addresses the challenges and methods of grafting proteins onto synthetic polymer surfaces. The sensitivity of polymers to aqueous media and the differences in chemical functions and physical properties make protein grafting on synthetic polymers a unique process. The review discusses various routes of covalently bonding proteins onto polymeric substrates and highlights the concern of potential loss of function. The characterization methods used to determine grafting efficiency and enzyme behavior are also examined. Furthermore, the review considers the industrial applications and future prospects of protein grafting, emphasizing the importance of sustainable processes based on green chemistry.
BIOTECHNOLOGY ADVANCES
(2023)
Article
Biochemistry & Molecular Biology
Annj Zamuner, Antonella Pasquato, Ignazio Castagliuolo, Monica Dettin, Paola Brun
Summary: In the orthopedic, dental, and maxillofacial fields, joint prostheses, plates, and screws are widely used for the treatment of bone-related problems. However, complications can arise due to the fibrotic encapsulation of these implants, which hinders optimal integration with the surrounding bone. To address these issues, biomimetic titanium implants have been developed, incorporating selective grafting of synthetic peptides onto titanium surfaces to promote better fusion.
Article
Chemistry, Organic
Shiv Shankar Gupta, Manisha, Rakesh Kumar, Ankit Kumar Dhiman, Upendra Sharma
Summary: A regioselective para-C-H halogenation method using SEAr type reaction for N-pyrimidyl (hetero)aromatics has been developed, with wide applicability and high yields for bromination, iodination, and challenging chlorination. The pyrimidyl group acts as a reactivity tuner controlling the regioselectivity, and DFT studies support the observed para-selectivity. Late-stage C-H bromination was also demonstrated on drug/natural molecules to showcase the protocol's applicability.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2021)
Review
Polymer Science
Maneesh Kumar, Praveen Singh Gehlot, Deepika Parihar, Praveen K. Surolia, Gayatri Prasad
Summary: Cellulose is an abundant organic substance with various applications such as paperboard production, drug delivery, and food packaging due to its bio-renewable and bio-degradable properties. Radical polymerization is commonly used to create cellulose derivatives with improved properties, by reacting cellulose with small organic fragments like methacrylate and styrene. Initiators like Fenton's reagent and controlled radical polymerization methods are utilized to generate free radicals on the cellulose backbone for grafting purposes, allowing for the development of functional cellulose with enhanced physical and chemical properties.
EUROPEAN POLYMER JOURNAL
(2021)
Article
Chemistry, Physical
Wei-Sheng Chen, Chih-Yuan Hsiao, Cheng-Han Lee
Summary: Tantalum capacitors are commonly used in small electronic products. This study investigated the selective leaching and chlorination processes to recover tantalum and manganese from spent tantalum capacitors. The results showed that high recovery rates could be achieved by optimizing the reaction conditions.
Article
Chemistry, Inorganic & Nuclear
Yufen Zong, Chunmei Zhang, Hai Cao
Summary: A study on the covalent functionalization of chiral inorganic nanostructures was conducted to evaluate the effects of chiral reductants, chirally functionalized surfaces, and chiral solvents on the chiral functionalization of solid surfaces.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Multidisciplinary
Petra Bacova, Wei Li, Alireza F. Behbahani, Craig Burkhart, Patrycja Polinska, Manolis Doxastakis, Vagelis Harmandaris
Summary: This study investigated the conformational and dynamical features of unentangled and mildly entangled cis-1,4-polybutadiene melts near an amorphous silica surface through atomistic simulations. The results reveal dynamical heterogeneities on the silica surface and suggest that configurational entropy plays an important role in the dynamic response of polymers confined between silica slabs.
Article
Materials Science, Multidisciplinary
Shinpei Ishikawa, Katsuki Kawahara, Shoki Tomizawa, Yusuke Watanabe, Masatoshi Tokita
Summary: This study demonstrates that a liquid crystal polymer (LCP) can effectively enhance the thermal conductivity of thermally conductive composites. By adding allyl-functionalized magnesium oxide particles (MgOPs) into the LCP matrix, the composite film's thermal conductivity can be increased to 2.0 W m(-1)K(-1).
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Green & Sustainable Science & Technology
Eunseung Hwang, Younggeun Lee, Jaemook Lim, Youngchan Kim, Weihao Qu, Koungjun Min, Won Chul Lee, Sukjoon Hong
Summary: A novel laser-based process was developed to create controllable hydrophobic surface structures on a highly stretchable polymer substrate. The method involved laser-induced pyrolysis on a pre-stretched Ecoflex polymer, resulting in hierarchical micro/nanostructures with improved hydrophobic properties compared to a flat surface. This technique offers a facile manufacturing approach for stretchable polymer substrates with patterned hydrophobic surfaces.
INTERNATIONAL JOURNAL OF PRECISION ENGINEERING AND MANUFACTURING-GREEN TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Nagihan Ozbek, Elif L. Sahkulubey Kahveci, Muhammet Ubeydullah Kahveci
Summary: This study developed a grafting technique for glass surfaces using light-induced inverse electron demand Diels-Alder (photo-IEDDA) reaction. The successful grafting of polymers and proteins onto glass surfaces was demonstrated through various characterization techniques.
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Chemistry, Applied
Thi Nguyet Tran, Arnaud Nourry, Pamela Pasetto, Guillaume Brotons
Summary: A new methodology for covalently grafting polyisoprene onto various surfaces has been developed, achieving high glass surface coverage density and strong covalent bonding. This method allows for the formation of versatile polymeric constituents and represents a new family of sustainable coatings.
PROGRESS IN ORGANIC COATINGS
(2021)
Article
Biochemistry & Molecular Biology
Inho Kim, Yohan Kim, Sung Min Kang
Summary: Grafting zwitterionic molecules onto solid surfaces is an important method for reducing the unwanted adsorption of biomolecules. Various approaches have been used, including zwitterionic monolayer/multilayer formation and surface-initiated polymerization. Recently, a coordination-driven approach has been discovered to be effective. However, the resistance against bacterial adhesion and other fouling organisms has not been fully explored. In this study, the coordination-driven surface zwitteration is systematically investigated using different molecular weights of sulfobetaine polymers. The high molecular weight polymer is found to be crucial for achieving strong resistance to protein adsorption and marine fouling.
MACROMOLECULAR BIOSCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Anna Wozniak, Vincent Humblot, Romain Vayron, Remi Delille, Celine Falentin-Daudre
Summary: Poly(dimethyl siloxane) (PDMS) is widely used in the biomedical field, but its hydrophobic nature promotes bacterial adhesion and biofilm formation, which challenges the biocompatibility of breast implants. To prevent bacterial contamination, the laboratory has developed strategies to covalently graft hydrophilic bioactive polymers onto the implant surface. Poly(methacrylic acid) (PMAc) and poly(acrylic acid) (PAAc) were chosen as non-toxic and biocompatible polymers known for reducing bacteria adhesion. The study confirmed the successful grafting of these polymers and the change in hydrophilicity through various analytical techniques. The mechanical properties of the material were also tested to ensure the functionalization process does not significantly alter them.
Article
Materials Science, Coatings & Films
Yanchun Xie, Xiaodong Wang, Shenshen Cui, Jiali Hu, Yongcun Wei, Yi Lian, Anwu Xuan, Bin Yu, Erlin Zhang
Summary: In this study, Ti-xFe (x = 3,5,9 wt%) alloys were surface modified by micro-arc oxidation (MAO) to improve their antimicrobial properties and biocompatibility. The results showed that increasing the oxidation voltage greatly enhanced the roughness and hydrophilicity of Ti-xFe-MAO alloys. The Ti-xFe alloys micro-arc oxidized at 250 V and 300 V exhibited improved corrosion resistance and excellent antimicrobial and cytocompatibility properties, making them suitable for orthopedic implant materials.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Yuting Hao, Zuoyan Ye, Lili Wang, Minheng Ye, Hui Dong, Chao Wang, Yunchen Du
Summary: This study focuses on the modification of PEO coatings on Ta-12W alloy using NH4F additive. The results show that ultra-low porosity coatings can be prepared by optimizing the NH4F content. The formation process of specific structures on the coating surface is discussed, and the effects of NH4F concentration and treatment duration on coating characteristics are investigated.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Yuanzhuo Liu, Linjiang Chai, Tao Yang, Chaodan Hu, Chuanmei Wang, Guoqiang Xi
Summary: By employing a pulsed laser, laser cladding was performed on IN718 alloy pre-coated with CrCoNi-TiC/SiC powders and three defect-free coatings were successfully prepared. The addition of TiC and SiC powders generated fine carbides dispersed in the coatings and led to changes in grain and substructure morphologies, resulting in increased hardness and wear resistance.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
M. Ghaemi, A. Lopez-Cazalilla, K. Sarakinos, G. J. Rosaz, C. P. A. Carlos, S. Leith, S. Calatroni, M. Himmerlich, F. Djurabekova
Summary: The use of high-power impulse magnetron sputtering can result in dense and uniform niobium films on all surfaces of superconducting rf cavities, as simulated and investigated in this study.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Jiaheng Du, Xinli Fan, Dongqin Xiao, Wuxiang Wang, Yiran Yin, Zhong Li, Kui He, Yanfei Tan, Jiyuan Yan, Gangli Liu, Ke Duan
Summary: This study investigated the electrophoretic deposition (EPD) of magnesium oxide (MgO) coatings on micro-arc oxidized titanium (MAO-Ti) and evaluated their in vitro antibacterial properties and biocompatibility. The results showed that MgO coatings significantly reduced bacterial numbers and biofilm formation, while also demonstrating good cytocompatibility and induction of osteoblast mineralization.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Samiksha Moharana, Yuichi Otsuka, R. Gnanamoorthy
Summary: The addition of titania to HAp coatings improves their wear resistance and reduces damage to titanium implants caused by debris generation. This study evaluates the fretting wear resistance of titania-added HAp suspension plasma spray coating and finds that it exhibits reduced friction coefficient and increased wear resistance.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Li-Ping Wu
Summary: The functional hazenite coating deposited on AZ31 Mg alloy showed improved roughness and hydrophilicity, enhanced biocompatibility, reduced degradation rate, and decreased susceptibility to stress corrosion cracking.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Ning Tian, Delei Xu, Jinfei Wei, Bucheng Li, Junping Zhang
Summary: This study reports the preparation of a superhydrophobic and anti-bacterial fabric for face masks. The fabric exhibits high superhydrophobicity and excellent moisture resistance, enabling functionality effectiveness in cold weather conditions. The fabric also demonstrates remarkable anti-bacterial activity against E. coli, attributed to the synergistic effect of superhydrophobicity and embedded ZnO nanoparticles. This superhydrophobic anti-bacterial fabric holds great potential for various practical applications in personal protective equipment, healthcare, and disease prevention.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Katharina Beck, Anke S. Ulrich, Andreas K. Czerny, Emma M. H. White, Martin Heilmaier, Mathias C. Galetz
Summary: Refractory metal based alloys have great potential as structural materials for high-temperature applications due to their high melting points. However, they are prone to catastrophic oxidation at around 700 degrees C. This study investigated the effect of aluminium diffusion coatings on the oxidation resistance of pure molybdenum, niobium, tantalum, and tungsten. The results showed that the aluminization improved the oxidation behavior and decreased the oxide growth rate for molybdenum and tantalum.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Wenwen Shuai, Haijun Dou, Zhichen Guan, Wei Qian, Zhibao Li, Yinqun Hua, Jie Cai
Summary: This study synthesized (Y1-xLax)3Al5O12 (x = 0, 0.1, 0.2, 0.3) materials by doping lanthanum ions, and found that the doped materials exhibited improved mechanical properties and thermal expansion coefficient, as well as enhanced resistance to CMAS corrosion. These materials have potential applications.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Xianglei Liu, Jiahui Ding, Wanbo Hou, Xinhao Shi, Tao Feng, Xiangyuan Meng, Shifeng Wen, Mingde Tong, Zhufeng Yue
Summary: A composite coating was developed to improve the adhesion, wear resistance, and corrosion resistance, which exhibited significant enhancements in these properties.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Hongxuan Xing, Jidong Li, Xianwei Hu, Liang Tian, Renyun Zhang, Yiyong Wang
Summary: By depositing a Cu/Co-Mo corrosion-resistant plating layer on the surface of 6061 Al alloy, the bonding strength between the alloy and the plating layer can be improved and the corrosion resistance can be enhanced. The composite coating forms an obvious three-layer structure with Co-Mo coating exhibiting amorphous characteristics and Co3Mo phase composition. The composite coating improves the corrosion resistance and hardness of the substrate, effectively protecting the 6061 Al alloy.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Fan Yang, Debin Wang, Tianrun Li, Baijun Yang, Suode Zhang, Jianqiang Wang
Summary: The impact-corrosion behavior of monolayer and hierarchical Fe-based amorphous coatings fabricated by HVAF was investigated in 3.5 wt% NaCl solution. The monolayer coating exhibits corrosion failure with increased impact energy, while the hierarchical coating shows improved resistance. However, at high impact energies, both coatings experience corrosion degradation.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Shoaib Ahmad, Muddasir Nawaz, Solaiman Mohammad, R. A. Shakoor, Ramazan Kahraman, Talal Mohammed Al Tahtamouni
Summary: This research presents a novel self-healing anti-corrosion composite coating that demonstrates higher inhibition efficiency and self-healing effect, providing protection for metallic structures against corrosive environments.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Hui-Wen Peng, Chun-Hway Hsueh
Summary: A series of (CoCrNi)100-x-ySixNdy medium entropy alloy films with manipulated metalloid element, Si, and rare earth element, Nd, were synthesized using magnetron three-target co-sputtering. The films showed different structures and mechanical properties with varying Si and Nd contents. The optimized mechanical properties were observed in the film with Si0.61Nd5.14, attributed to precipitation strengthening and grain refinement.
SURFACE & COATINGS TECHNOLOGY
(2024)