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engineering hydrogen-bonded organic frameworks: Pioneering membrane materials for advanced separation

Separation and Purification Technology 2025年 370卷

作者： Elboughdiri, Noureddine Kriaa, Karim Maatki, Chemseddine Fatimah, Siti Chaouiki, Abdelkarim Chafiq, Maryam Ko, Young Gun Chemical Engineering Department College of Engineering University of Ha'il P.O. Box 2440 Ha'il81441 Saudi Arabia Riyadh11432 Saudi Arabia Riyadh11432 Saudi Arabia Integrated Materials Chemistry Laboratory School of Materials Science and Engineering Yeungnam University Gyeongsan38541 Cuba Chemistry Program Universitas Pendidikan Indonesia Bandung40154 Indonesia

Hydrogen-bonded organic frameworks (HOFs) are a class of crystalline porous materials that are primarily synthesized through the self-assembly of organic or metal–organic building blocks via intermolecular hydrogen bonding interactions. These materials have garnered significant attention for their potential in low-carbon, energy-efficient separation processes, particularly in the areas of adsorption and membrane separation. The inherent capability of HOFs for solution processing further enhances their versatility, allowing for the fabrication of adsorbents and membranes with tailored microstructures that can be fine-tuned to meet specific separation requirements. Recent advancements in HOF-based membranes have focused on innovative strategies for material preparation, including the selection of suitable building blocks, the optimization of synthesis conditions, and the development of new classification techniques. In this context, a comprehensive analysis of recent advancements in the design and synthesis of HOF-based membranes, emphasizing novel material engineering strategies has been discussed. Furthermore, the potential of HOF-based membranes, governed by their physicochemical properties and hierarchical self-assembly, is systematically examined in this review. Finally, the challenges and future prospects of HOF-based membranes are systematically analyzed, with a focus on structural stability, performance optimization, and advanced functionalization strategies to enhance their high-precision applicability in high-precision separation. © 2025 Elsevier B.V.

关键词： Self assembly

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Improving self-healing characteristics of polyurethane composite coatings by surface modification of polyaniline using dodecylamine

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engineering Failure Analysis 2025年 176卷

作者： Ahmad, Shoaib Nawaz, Muddasir Mohammad, Solaiman Al-Qahtani, Noora Kahraman, Ramazan Mansoor, Bilal Shakoor, R.A. Qatar University Doha2713 Qatar Materials Science & Technology Program College of Arts & Sciences Qatar University Doha2713 Qatar Department of Mechanical and Industrial Engineering Qatar University Doha2713 Qatar Department of Chemical Engineering College of Engineering Qatar University Doha2713 Qatar Qatar University Doha2713 Qatar Department of Materials Science and Engineering Texas A&M University College Station United States

Corrosion is one of the most critical problems affecting the structural integrity of metals. Polymeric nanocomposite coatings reinforced with anti-corrosive pigments are currently being used to mitigate corrosion. This study involves the synthesis of polyaniline (PANI) nanoparticles and their modification with dodecylamine (DOC), which functions as a corrosion inhibitor. Polyurethane coatings (PU-PANI@DOC) were developed by incorporating modified nanoparticles (PANI@DOC) into the polyurethane matrix, and blank polyurethane coatings (PU-blank) were prepared without any nanoparticles. Fourier-transform infrared spectroscopy (FTIR), Transmission electron microscopy, and Scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM/EDX) analysis confirmed the successful modification of dodecylamine (DOC) with the surface of polyaniline (PANI) nanoparticles. The electrochemical impedance spectroscopy (EIS) and salt spray test (SST) revealed that the impedance values of the modified coating follow an inclined trend (1010 Ω.cm2) in comparison with PU-blank coatings (107 Ω.cm2) after the 14th day of immersion in 3.5 wt% NaCl. Moreover, the hydrophobic characteristics of PANI@DOC nanoparticles shift the contact angle from 60° to 90°, thus lowering the wettability nature of modified coatings. Overall, Polyurethane coatings (PU-PANI@DOC) exhibiting potential attributes such as barrier properties, hydrophobic nature, inhibition effect, and high compatibility with polyurethane matrix can be a suitable material for the development of smart self-healing coatings to protect the metals from the hostile effects of corrosion. © 2025 Elsevier Ltd

关键词： Fourier transform infrared spectroscopy

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chemical mechanical polishing as an alternative surface treatment technique for corrosion prevention of carbon steel in an acidic medium

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Scientific Reports 2025年第1期15卷 1-11页

作者： Ahmed, Mohamed Ali Al-Timimi, Buthainah Al-Ali, Maha Abdullah, Ghassan H. Khalaf Atiyaha, Safa Yaseen Ali Aljanabi, Ahmed Mel, Maizirwan Mechanical Engineering Department College of Engineering Tikrit University Tikrit Iraq Chemical Engineering Department University of Technology-Iraq Baghdad Iraq Chemical Engineering and Sustainability Department Faculty of Engineering International Islamic University of Malasiya (IIUM) Kuala Lumpur Malaysia Oil and Gas Refining Engineering Department College of Petroleum Process Engineering Tikrit University Tikrit Iraq Petroleum Systems Control Engineering Department College of Petroleum Processes Engineering Tikrit University Tikrit Iraq Modeling and Design Program Atilim University Ankara Turkey

chemical mechanical polishing (CMP) has been a standard technique in semiconductor manufacturing for achieving smooth surfaces. CMP utilizes a synergistic interplay of chemical and mechanical interactions to achieve the desired removal rates, selectivity, and ultimately planarity with different substrate materials. In this study, the impact of CMP on the surface properties of steel used in the petroleum industry was examined, with a focus on its corrosion behavior posttreatment. Steel samples were subjected to CMP with and without an oxidizer in a silica-based slurry, and their surface characteristics were compared to those of samples polished mechanically. The addition of an oxidizer to the slurry resulted in increased material removal rates and the formation of an oxide layer on the surface;this phenomenon was not observed in CMP without an oxidizer. However, in mechanical polishing, the action of silicon carbide grains on the steel surface led to an increase in the removal rate but caused a decrease in its corrosion resistance. Compared with other treatments, the oxide layer provided a good protective barrier against corrosion and improved the corrosion resistance of the steel substrate. Based on the results from the practical study, an improvement in the corrosion resistance properties was observed due to the chemical reaction of the oxidizer and the mechanical action of the silica nanoparticles;these results showed the importance of chemical mechanical polishing as an alternative method to reduce the corrosion of steel in acidic environments. Additionally, the effect of hydrogen peroxide in a silica slurry with respect to the wettability, surface roughness, and hardness of steel was examined using contact angle measurements, profilometry, scanning electron microscopy, and microhardness tests. © The Author(s) 2025.

关键词： chemical mechanical polishing Contact angle Electrochemical corrosion test Hydrogen peroxide oxidizer Immersion test Material removal rate Silica-based slurry Surface roughness

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The Effect of Chlorinated Cyanurates on the Formation of Disinfection Byproducts in the Production of Reuse Water from Secondary Sanitary Effluent

SSRN

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SSRN 2025年

作者： Paschoalato, Cristina Filomêna Pereira Rosa da Silva Boldrin Dias, Talita Rafaella de Freitas Afonso, Márcia Maísa Agnesini, Marília Vanconcellos Zagui, Guilherme Sgobbi Dantas, Angela Di Bernardo de Mello Innocentini, Murilo Daniel Postgraduate Program in Environmental Technology University of Ribeirão Preto Brazil Course of Chemical Engineering University of Ribeirão Preto Brazil Hidrosan Engenharia SP São Carlos Brazil University of Bath United Kingdom

Chlorination is an effective and proven method for disinfecting reclaimed water, but side reactions between chlorine and organic matter in the effluent can produce a variety of toxic disinfection byproducts (DBPs). While inorganic chlorine is commonly used in wastewater treatment facilities, little attention has been paid to the use of chlorinated cyanurates such as sodium dichloroisocyanurate (NaDCC) and trichloroisocyanuric acid (TCCA), which have long been used to disinfect drinking water for human consumption and recreation. In this work, the performances of NaDCC and TCCA were compared with sodium hypochlorite (NaCO), either in solution or onsite generated by electrolysis (NaCO-e), to disinfect the secondary effluent (SE) from a municipal wastewater treatment plant (WWTP) aiming for nonpotable reuse applications. The chlorinated product dosages were determined using breakpoint demand tests at 25°C, pH 7.0, and contact times of 0.5 and 24 h. DBPs from trihalomethanes, haloaldehydes, halopicrins, haloacetonitriles, and haloketones were measured. To achieve the breakpoint with a free residual chlorine of 1 mg C2 L-1 and promote complete SE disinfection, dosages of 50 mg C2 L-1 were required. NaDCC and TCCA produced significantly more chloroform (635.2 µg L-1 and 440.1 µg L-1), bromodichloromethane (53.6 µg L-1 and 33.9 µg L-1), chloral hydrate (363.4 µg L-1 and 308.2 µg L-1), and 1,1,1-trichloropropanone (89.0 µg L-1 and 142.2 µg L-1), listed as possible or probable carcinogens by ***. The municipal WWTP's cost assessment for chlorinating 18000 m3 d-1 of SE revealed the benefits of using NaCO-e, including low production of DBPs and no increase in organic carbon in the medium. © 2025, The Authors. All rights reserved.

关键词： Chlorination

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chemical precipitation of nanocrystalline hydroxyapatite with calcium carbonate derived from green mussel shell wastes and several phosphorus sources

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Case Studies in chemical and Environmental engineering 2025年 11卷

作者： Naubnome, V. Prihanto, A. Schmahl, W.W. Pusparizkita, Y.M. Ismail, R. Jamari, J. Bayuseno, A.P. Department of Mechanical Engineering Diponegoro University Tembalang Semarang Indonesia Chemical Engineering Vocational Program Catholic Polytechnic Mangun Wijaya Semarang Indonesia Department of Earth and Environmental Science Ludwig Maximillian University of Munich Germany Department of Environmental Engineering Diponegoro University Semarang Indonesia

This work reports on a chemical precipitation experiment to produce nanocrystalline calcium hydroxyapatite (Ca-HA) using a calcium carbonate precursor derived from green mussel shells. Ammonium biphosphate and phosphoric acid were mixed with the precursor, achieving a pH of 13–14 by stirring magnetically at 30 °C for 48 hours. The nanocrystalline Ca-HA product (8–13 nm) was validated through X-ray diffraction and Fourier-transform infrared spectroscopy with an average calcium-to-phosphorus ratio molar of 1.8, influencing the thermal stability according to thermogravimetric and differential thermal analysis. Green mussel shell wastes are a recyclable calcium resource potentially used to synthesize nanocrystalline hydroxyapatite. © 2025 The Authors

关键词： Calcium carbonate chemical precipitation Green mussel shell waste Nanocrystalline hydroxyapatite Thermal stability

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Mechanical Analysis of Lithium-Ion Batteries Via Acoustic Impedance Spectroscopy

ACS Electrochemistry

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ACS Electrochemistry 2025年第4期1卷 516-522页

作者： Charles Soulen Stewart Sherrit Erik Brandon Ping Liu Program of Materials Science and Engineering University of California San Diego 9500 Gilman Drive La Jolla California 92093 United States Jet Propulsion Laboratory California Institute of Technology 4800 Oak Grove Drive Pasadena California 91109 United States Program of Materials Science and Engineering University of California San Diego 9500 Gilman Drive La Jolla California 92093 United States；Aiiso Yufeng Li Department of Chemical and Nano Engineering University of California San Diego 9500 Gilman Drive La Jolla California 92093 United States

The mechanical properties of lithium-ion batteries (LIB) are closely related to their state-of-charge (SOC) and state-of-health (SOH). Here, we introduce an in-operando acoustic technique based on acoustic impedance spectroscopy (AIS) which probes the mechanical changes that occur in the LIB during operation. Using thin, inexpensive piezoelectric resonators and widely available impedance analyzers, we can identify the acoustic resonances of commercial LIBs by measuring the complex electrical impedance of the resonator. In-operando AIS shows that these resonances are dependent on the bulk mechanical properties of the LIB, which change reversibly as the cell is cycled. We show that this technique can provide substantial information on both the SOC and SOH of a commercial LIB.

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An improved flexible tolerance method for solving nonlinear constrained optimization problems:Application in mass integration

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Chinese Journal of chemical engineering 2017年第5期25卷 617-631页

作者： Alice Medeiros Lima Wu Hong Kwong Antonio José Goncalves Cruz Chemical Engineering Graduate Program Federal University of Sao Carlos Department of Chemical Engineering Department of Chemical Engineering Federal University of Sao Carlos

This paper proposes the use of the flexible tolerance method(FTM) modified with adaptive Nelder–Mead parameters and barrier to solve constrained optimization problems. The problems used to analyze the performance of the methods were taken from G-Suite functions, and the methods with the best performance were applied in mass integration problems. Four methods were proposed:(1) flexible tolerance method(FTM) using adaptive parameters(FTMA),(2) flexible tolerance method with scaling(FTMS) and with adaptive parameters(FTMAS),(3) FTMS including the barrier modification(MFTMS) and(4) MFTMS hybridized with PSO(MFTMS-PSO). The success rates of these methods were 100%(MFTMS), 85%(MFTMS-PSO), 40%(FTMAS) and 30%(FTMA).Numerical experiments indicated that the MFTMS could efficiently and reliably improve the accuracy of global optima. In mass integration, the method was able, from current process situation, to reach the optimum process configuration that includes integration issues, which was not possible using FTM in its standard formulation. The hybridization of FTMS with PSO(without barrier), FTMS-PSO, was also able to solve mass integration problems efficiently.

关键词： Flexible tolerance method Adaptive parameters Scaling Constrained optimization Barrier PSO Mass integration

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Sintering-based lithography metal additive manufacturing of chiral mechanical metamaterials with a twist

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Procedia CIRP 2025年 132卷 104-109页

作者： Ruslan Melentiev Ahmed Wagih Bram van der Heijden Gilles Lubineau Carlos A. Grande Advanced Membranes & Porous Materials Center. King Abdullah University of Science and Technology (KAUST) Thuwal 23955-6900 Saudi Arabia KAUST Catalysis Center. King Abdullah University of Science and Technology (KAUST) Thuwal 23955-6900 Saudi Arabia Mechanical Engineering Program Physical Sciences and Engineering Division King Abdullah University of Science and Technology (KAUST) Saudi Arabia Mechanics of Composites for Energy and Mobility Lab King Abdullah University of Science and Technology (KAUST) Thuwal 23955-6900 Saudi Arabia Chemical Engineering Program. Physical Science and Engineering Division King Abdullah University of Science and Technology

Metamaterials are a class of materials with extraordinary capabilities derived from their engineered structure. In 2017, Frenzel et al. (Science 358, 2017) conceptualized “three-dimensional mechanical metamaterials with a twist,” which convert linear deformation into rotational motion—a mechanical response that surpasses the bounds of Cauchy continuum mechanics. However, the lack of suitable manufacturing technologies for producing metallic twist metamaterials has precluded their experimental validation and potential applications to date. Herein, 316L-stainless-steel twist metamaterials are fabricated at various scales using an emerging sintering-based technology—lithography metal manufacturing (LMM) —and their mechanical responses are tested using stereo digital image correlation. Results provide the first empirical evidence of compression-induced rotation in steel twist metamaterials and highlight their sensitivity to manufacturing defects. Download: Download video (753KB) Download: Download video (2MB) Download: Download video (4MB)

关键词： Additive manufacturing sintering stainless steel metamaterials mechanical properties

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Lithography-based additive manufacturing of steel metamaterials: effect of sintering temperature on shape distortion, microstructure and mechanical properties

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Procedia CIRP 2025年 132卷 80-85页

作者： Ruslan Melentiev Ahmed Wagih Gilles Lubineau Carlos A. Grande Advanced Membranes & Porous Materials (AMPM) Center. King Abdullah University of Science and Technology (KAUST) Thuwal 23955-6900 Saudi Arabia KAUST Catalysis Center (KCC). King Abdullah University of Science and Technology (KAUST) Thuwal 23955-6900 Saudi Arabia Mechanical Engineering Program Physical Sciences and Engineering Division King Abdullah University of Science and Technology (KAUST) Saudi Arabia Mechanics of Composites for Energy and Mobility Lab King Abdullah University of Science and Technology (KAUST) Thuwal 23955-6900 Saudi Arabia Chemical Engineering Program. Physical Science and Engineering (PSE) Division King Abdullah University of Science and Technology

Lithography metal manufacturing (LMM) is an emerging sinter-based additive manufacturing (AM) technology for support-free 3D printing of extremely complex parts with micrometric resolution on a decimeter scale. Although the printing phase of LMM is well-established, the sintering stage is challenging due to either high porosity or melting-induced deformation, particularly in thin-walled lattices and metamaterials. This study investigates the effects of sintering temperature on shape distortion, surface morphology, chemistry, porosity, microstructure, and mechanical properties of 316L stainless steel auxetic metamaterials 3D printed using LMM and sintered in a furnace customized for precise temperature control. Our results show that the fully dense grain microstructure with high plasticity can be sintering within 1300 – 1325 °C range. Going beyond this temperature results in shape distortion and embrittlement of the steel metamaterials. The previously recommended range of sintering temperatures for 316L steel, 1360 - 1380 °C need revision.

关键词： Additive manufacturing (AM) Debinding Sintering Metal Metamaterials Mechanical properties

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Molecularly imprinted polymers for illicit drug detection: A review of computational and synthesis methods

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Talanta 2025年 294卷 128220页

作者： Neres, Lariel Chagas da Silva Khan, Sabir Zeb, Shakeel Sotomayor, Maria del Pilar Taboada Calvo-Marzal, Percy SP Araraquara14801-970 Brazil Department of Chemistry University of Central Florida OrlandoFL32816 United States Technological Development Center—CDTec Postgraduate Program in Materials Science and Engineering—PPGCEM Federal University of Pelotas—UFPel RS Pelotas96010-610 Brazil School of Chemistry and Chemical Engineering Jiangsu University Zhenjiang212013 China

This review discusses the current state of molecularly imprinted polymers (MIPs) used for drug extraction and quantification. It begins with an introduction to MIP synthesis techniques that utilize illegal drugs as templates. The subsequent sections explore applications, focusing on the detection of illegal narcotics. The advantages and limitations of MIPs receive detailed examination. A comprehensive literature survey then covers various classes of illicit drugs, including opioids, stimulants, cannabinoids, and hallucinogens. Notably, the review highlights the role of computational simulations, including density functional theory (DFT), in optimizing MIP fabrication and enhancing performance. The review concludes with a discussion on the challenges related to the lack of standard parameters for selectivity, the need for robust characterization methods, and the pros and cons of using nanomaterials in MIPs. Recommendations for resolving these issues and potential future developments aimed at broadening the application scope in relevant fields are presented. Overall, this review serves as a valuable resource for researchers involved in the development and application of illicit drug detection technologies using molecularly imprinted polymers. © 2025 Elsevier B.V.

关键词： Density functional theory

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