Review
Chemistry, Multidisciplinary
Nazanin Nasrollahi, Leila Ghalamchi, Vahid Vatanpour, Alireza Khataee, Maryam Yousefpoor
Summary: This review paper provides an overview of the role of polymeric additives in the fabrication of polymeric membranes. The additives can influence the formation of pores, permeability, hydrophilicity, and even the creation of desirable properties such as antifouling and antibacterial properties. Different methods of incorporating additives into polymeric matrix are explored to identify the best additives for various types of polymeric membranes. The compatibility of additive polymers with matrix polymers and the effectiveness of functional additives are also discussed.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2022)
Review
Chemistry, Analytical
Ester Lubomirsky, Aminreza Khodabandeh, Jasmin Preis, Moritz Susewind, Thorsten Hofe, Emily F. Hilder, R. Dario Arrua
Summary: Synthetic and natural macromolecules play significant roles in various fields, and characterizing their structural parameters is essential for understanding structure-property relationships. Size exclusion chromatography is a commonly used technique for polymer characterization, and advancements in stationary phase design and synthetic methods can enhance its efficiency in macromolecule separation.
ANALYTICA CHIMICA ACTA
(2021)
Article
Construction & Building Technology
Zhen Jiang, Guojun Cai, Guanglin Tian, Xuening Liu
Summary: This study evaluates the effect of aggregate particle size on the pore size distribution in mortars. The results show that the surface-to-volume ratio of the aggregate is the main parameter affecting the pore structure of the mortar, with a decrease in the surface-to-volume ratio leading to a richer pore structure.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Thermodynamics
Jianguo Wu, Chao Luo, Kesu Zhong, Yi Li, Guoliang Li, Zhongming Du, Jijin Yang
Summary: To accurately and comprehensively analyze the properties of organic nanopores in marine shale, an integration method using helium ion microscope (HIM), scanning electron microscope (SEM), focused ion beam-HIM (FIB-HIM), and FIB-SEM was proposed. Results showed that organic pores below 10 nm significantly impact shale gas storage and productivity evaluation by affecting porosity, surface area, pore size distribution, and connectivity characteristics. The integration method revealed an increase in surface porosity by 10.73% and an increase in specific surface area by 76%. It also showed that the formation of organic nanopores occurs in multiple stages, with larger bubble pores appearing during oil generation and smaller spongy pores appearing during gas generation. The organic pores revealed by FIB-HIM exhibited higher coordination numbers and a higher proportion of inner-connected volume, indicating more complex connectivity characteristics. Despite limitations, these novel insights highlight the importance of exploring organic nanopores at the nanoscale and have the potential to inform further research in this field.
Article
Construction & Building Technology
Guangfeng Ou, Toshiharu Kishi, Liwu Mo, Zhihai Lin
Summary: This study evaluates the early-age cracking sensitivity of concretes blended with Calcium Sulfoaluminate and MgO expansive additives under different engineering conditions using the self-developed temperature stress testing machine (TSTM). The performances of the concretes under wetting-drying cycles are also compared. Pore structures are characterized to interpret the deformation mechanism in a microscopic scale. The findings provide new insights in modelling and application of expansive concretes on site.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Biochemistry & Molecular Biology
Wei Liu, Yuxi Zhang, Shui Wang, Lisen Bai, Yanhui Deng, Jingzhong Tao
Summary: Experiments show that small molecules reach adsorption equilibrium faster than large molecules, and resins with small pores are more susceptible to pore blockage effects. The specific surface area of resins decreases after amination, with different amine modifications leading to changes in pore diameter and subsequent adsorption capacities.
Article
Construction & Building Technology
Lin Ning, Yu Zhao, Jing Bi, Chaolin Wang, Mingxuan Shen, Yang Li
Summary: The size of aggregates has a significant influence on the hydration process of cement mortar, particularly on water distribution and pore structure characteristics. Water is consumed and some water oozes out during hydration, and water in large pores flows to smaller pores under hydrostatic pressure. Aggregate size affects the uniformity of cement mortar, and the gradation of sand can improve uniformity. Smaller aggregate size leads to more complex and changing pore water distribution during hydration. Porosity has a greater impact on bleeding mass than aggregate size. Pore fractal dimension is negatively correlated with aggregate diameter and increases gradually with hydration time. Gel pores do not have fractal characteristics, capillary and transition pores develop fractal characteristics after a certain time, and air-voids have fractal characteristics but are not continuous.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Chemistry, Applied
Chong Wang, Shuangyang Li, Qian Chen, Hao Zhang, Xiaoyu Liu, Xiaochuan Ren
Summary: This study conducted large sample tests on nano-particle modified geomaterials, revealing significant variability in micropore parameters. By comparing different probability distributions, it was found that normal, lognormal, and gamma distributions fit the data well, with normal distribution being the most suitable.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Green & Sustainable Science & Technology
Mina Sedighi, Mohammad Reza Talaie, Hassan Sabzyan, Seyed Foad Aghamiri
Summary: The effects of nitrogen-containing functional groups and C/N-substituted ligands on CO2 capture performance and mechanism were investigated. Functionalization of the linker ligands was found to enhance CO2 uptake capacity and selectivity. A comprehensive molecular design approach was introduced for the development of practical metal-organic frameworks.
SUSTAINABLE MATERIALS AND TECHNOLOGIES
(2023)
Article
Construction & Building Technology
Mohammad Balapour, Thiha Thway, Newell Moser, Edward J. Garboczi, Y. Grace Hsuan, Yaghoob Farnam
Summary: This study characterizes the engineering properties of lightweight aggregate (LWA) manufactured from low calcium (F-FA) and high calcium (C-FA) waste fly ash. The properties examined include specific gravity, water absorption, porosity, pore size distribution, and permeability. The results show that the properties of the LWA are affected by the concentration of fluxing agent and all the LWA meet the water absorption requirements for internal curing of concrete.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Multidisciplinary Sciences
Lidija D. Vukovic, Pan Chen, Sampada Mishra, Karen H. White, Jason P. Gigley, Daniel L. Levy
Summary: Increasing NTF2 expression in metastatic melanoma cells can reduce cell proliferation and motility, inhibit metastasis, and prolong survival. NTF2 levels affect the expression and nuclear positioning of genes associated with cell proliferation and migration.
SCIENTIFIC REPORTS
(2021)
Article
Chemistry, Physical
Vilma Baneviciene, Jurgita Malaiskiene, Renata Boris, Jiri Zach
Summary: Pervious concrete has many advantages and applications, but its limited compressive strength and durability have restricted its use. This research found that the use of active additives and appropriate particle size distribution of coarse aggregate can improve the properties and durability of pervious concrete.
Article
Construction & Building Technology
Mohammad Balapour, Mohammad H. Khaneghahi, Edward J. Garboczi, Yick G. Hsuan, Diana E. Hun, Yaghoob Farnam
Summary: In this study, a spherical porous reactive aggregate (SPoRA) based on off-spec fly ash was manufactured and its engineering properties were evaluated. Lightweight concrete (LWC) samples made with SPoRA were compared with those made using two commercial lightweight aggregates (LWA). The results showed that SPoRA had higher water absorption capacities and specific gravity compared to the commercial LWAs. Despite having lower crushing strength, SPoRA LWC met the compressive strength requirements and had comparable strength to LWC prepared with commercial LWAs. SPoRA LWC also had lower flowability and similar hydration degree to LWC prepared with commercial LWA.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Lakshya Mathur, Hohan Bae, Yeon Namgung, Jun-Young Park, Sun-Ju Song
Summary: The present investigation comprehensively analyzes the rheological properties of tape casting slurry and optimizes its composition based on rheological results. The addition of polymeric chains as additives promotes the formation of a three-dimensional network structure in the aggregates, resulting in crack-free and homogeneous green tape.
KOREAN JOURNAL OF CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Xiao Zhang, Zhi Ding, Shao-Heng He, Gui-Di Zhang, Miao-Miao Sun, Tang-Dai Xia
Summary: In this paper, the microstructures of soil under lateral consolidation were investigated, and the changes in parameters such as equivalent diameter, porosity, circularity, directional frequency and fractal dimension were analyzed. The results showed that the microstructure of the soil changed significantly after consolidation, with changes in porosity, circularity and the compaction and homogenization of the soil.
APPLIED SCIENCES-BASEL
(2022)
Article
Chemistry, Physical
Sung-Hee Shin, Yekyung Kim, Sung-Hyun Yun, Sandip Maurya, Seung-Hyeon Moon
JOURNAL OF POWER SOURCES
(2015)
Article
Engineering, Chemical
Dohyeon Lee, Ju-Young Lee, Yekyung Kim, Seung-Hyeon Moon
SEPARATION AND PURIFICATION TECHNOLOGY
(2017)
Article
Chemistry, Multidisciplinary
Yekyung Kim, Dipak Rana, Takeshi Matsuura, Wook-Jin Chung
CHEMICAL COMMUNICATIONS
(2012)
Article
Engineering, Chemical
Yekyung Kim, Dipak Rana, Takeshi Matsuura, Wook-Jin Chung
JOURNAL OF MEMBRANE SCIENCE
(2009)
Article
Engineering, Chemical
Dipak Rana, Yekyung Kim, Takeshi Matsuura, Hassan A. Arafat
JOURNAL OF MEMBRANE SCIENCE
(2011)
Article
Engineering, Chemical
Yekyung Kim, Sung-Hee Shin, In Seop Chang, Seung-Hyeon Moon
JOURNAL OF MEMBRANE SCIENCE
(2014)
Article
Multidisciplinary Sciences
Sang Jin Lee, Yekyung Kim, Jun-Yeon Hwang, Ju-Ho Lee, Seungon Jung, Hyesung Park, Seungmin Cho, Sahn Nahm, Woo Seok Yang, Hyeongkeun Kim, Seung Ho Han
SCIENTIFIC REPORTS
(2017)
Article
Nanoscience & Nanotechnology
Kyung Pyo Hong, Dohyeon Lee, Jae Boong Choi, Yekyung Kim, Hyeongkeun Kim
ACS APPLIED NANO MATERIALS
(2018)
Article
Engineering, Chemical
Yunfei Yu, Xue Yang, Chenchen Zhang, Jie Chen, Wei Lin, Jianqiang Meng
Summary: This study reports an environmentally friendly and simple approach for preparing double-network (DN) ion gel membranes with high strength and excellent gas separation performance. By optimizing crosslinking density, mass ratio, and the type and content of free ionic liquid, the mechanical and gas separation properties of the DN membrane are improved.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Si-qi Jiang, Qiang Gao, Xi-guang Li, Chao-zhu Deng, Jun Qiu, Xiang-nan Zhu
Summary: A dual-strengthening pretreatment method is proposed to remove PVDF more efficiently and enhance the leaching of LiCoO2. Experimental results show that dual-strengthening pretreatment can effectively remove PVDF and significantly improve the leaching efficiency compared to single pretreatment methods.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Zengchi Hu, Xiaoyu Wang, Xiaohui Zhang, Xue Li, Jiangbin Xia
Summary: The rapid fabrication of high-performance composite membranes based on CMPs using simple and low-cost methods is challenging. In this study, three CMPs-based composite membranes were rapidly fabricated with adjustable size using unidirectional diffusion synthesis. The microstructural design enhanced the rejection rates of the membranes and they showed strong hydrolytic resistance, thermal stability, and acid-base resistance. Electrostatic adsorption and the adjustable microstructures significantly varied the repellence of the membranes to different charged molecules.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Farzaneh Rouhani, Matineh Ayedi, Nasser Safari
Summary: Introducing defects into porous metal-organic frameworks is important for improving their adsorption performance. Quasi-MOFs, an underutilized variant of large-scale, fundamentally deficient MOFs, have been found to have substantial amounts of unsaturated metal sites to offset the drawbacks of MOFs. In this study, a quasi-MOF was produced using a water-stable MOF and demonstrated significantly improved phosphate adsorption capability due to the presence of defect sites.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Valentin Reungoat, Morad Chadni, Louis M. M. Mouterde, Fanny Brunissen, Florent Allais, Helene Ducatel, Irina Ioannou
Summary: This study focuses on the recovery of sinapic acid using liquid-liquid extraction assisted by a hollow fiber membrane contactor from an aqueous feed obtained through the hydrolysis of mustard bran. The screening of solvents of different chemical nature showed that all tested solvents had an extraction efficiency of more than 80% for pH < 5. Four solvents were selected for use in the hollow fiber membrane contactor, and the volatile solvents showed higher mass transfer coefficients compared to non-volatile solvents. The extraction efficiency was intensified by increasing the initial concentration of sinapic acid and the feed-to-solvent ratio. CPME was found to have optimal recovery efficiency at a phase ratio of 8:1, yielding 0.9 g of sinapic acid per liter of CPME used.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Takahiro Sakamoto, Takafumi Hanada, Hayate Sato, Mayu Kamisono, Masahiro Goto
Summary: The emergence of the battery society has led to a high demand for battery metals, resulting in a strain on their supply. This study introduces a novel technique using a hydrophobic deep eutectic solvent (DES) for leaching and recovering battery metals from low-grade nickel laterite ores. The DES enables selective leaching and recovery of the metals, offering a promising pathway for the extraction of critical battery metals.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Rongrong He, Jiarui Chen, Chunyao Zhang, Dan Lu, Lin Zhang, Tao He
Summary: Researcher has developed a method to quantify the charge density in nanofiltration (NF) membrane separation layer and applied it in NF membranes that can separate Mg2+ and Li+. The results showed that overcompensated amine groups played a major role, and there was a linear relationship between charge density and coating bi-layers or PAH layers.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Zhijian Zhang, Min Chen, Zhe Lin, Zhichao Yang, Yafeng Du, Zhihui Chen, Zhenhao Yang, Kongyin Zhao, Ligang Lin
Summary: Membrane technology plays an important role in molecular/ion separation processes, but faces challenges such as membrane fouling. This study introduces a new ion-crosslinking method to fabricate copper alginate hydrogel membranes with improved mechanical strength and antimicrobial capabilities. The membranes exhibit excellent separation performance and enhanced long-term molecule/ion separation through improved anti-swelling properties. Molecular dynamics simulations and life cycle analysis highlight the pore structure and environmental friendliness of the hydrogel membranes. These findings provide valuable insights for developing sustainable hydrogel membranes with stable performance and high separation efficiency.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Dongmei Liu, Aiying Guo, Yanling Qi, Zhixin Ji, Hongjuan Li, Zhiwei Zhang, Xinyue Zhang, Kunze Wu, Aijun Cai
Summary: In this study, a stable magnetic Mg/Mn-layered double oxide-doped biochar composite (MgMnLDO-MBC) was prepared and successfully used for the removal of antibiotics and bacteria from wastewater. The composite exhibited enhanced surface areas, adsorption sites, and free radicals, leading to improved catalytic activity. The effects of different factors on the removal efficiency were evaluated, and the composite showed good reusability.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Feng Wang, Zhaoyong Bian, Yaru Zhang, Wenchao Yu, Qiang Zhang, Hui Wang
Summary: In this study, a nanofibrous layered structure of Ff-Ti3C2Tx-Co3O4 was prepared by self-assembling nanofibrous Co3O4 with lamellar fluorine-free MXene (Ff-Ti3C2Tx). The Ff-Ti3C2Tx-Co3O4 exhibited excellent catalytic activity for degradation, resistant to ionic interference, and maintained high removal efficiency of sulfamethoxazole (SMX) in municipal wastewater. The rapid SMX degradation involved fast electron transfer in redox cycles with PMS and the generation of 1O2 via PMS ->center dot O2 -> 1O2. This work provides new insights into antibiotic degradation mechanisms and electron transfer based on PMS activation.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Weipeng He, Jiacheng Luo, Yujie Wu, Tianhao Luo, Chen Tang
Summary: This study comparatively evaluated the role of cationic, anionic, and nonionic polyacrylamides (PAMs) in ballasted flocculation of clay suspensions under different aluminum sulfate (AS) coagulant dosages. The selection of PAMs and AS dosage had a significant influence on the size and shear resistance of ballasted floc aggregates.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Lixian Wang, Lizhi Zhao, Didi Si, Zhixin Li, Huiqin An, Hui Ye, Qingping Xin, Hong Li, Yuzhong Zhang
Summary: Metalloporphyrin-based nanozymes integrated with poly (vinylidene fluoride) membrane show high catalytic activity and reusability for the decolorization of Congo Red dye in continuous flow process.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Yongfei Ma, Chenyu Zeng, Yongzhen Ding, Jiayi Tang, Ondrej Masek, Zhikang Deng, Rui Mu, Zulin Zhang
Summary: In this study, sludge-derived biochar (SBC) was functionalized with various iron salts to enhance its adsorption ability for sulfamethoxazole (SMX) and magnetic collection performance. Ball milling was further employed to treat the optimal iron salt functionalized SBC (MSBC), resulting in ball milled SBC (BMSBC) with improved adsorption performance for SMX. The dominant driving mechanism for SMX adsorption onto BMSBC was confirmed to be multiple physicochemical forces, including 7C-7C conjugation, pore filling, H-bonding, Fe-O complexation, and electrostatic interactions. BMSBC exhibited favorable adsorption ability for SMX in actual waters and could be easily collected within 1 min due to its magnetic sensitivity.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Jinglin Tan, Xiaohui Mao, Wenjihao Hu, Hongbo Zeng
Summary: This study investigates the influence of PDMS chain architectures on surface properties and reveals that PDMS coatings with looped structures exhibit superior hydrophobicity, self-cleaning, and water sliding compared to coatings with linear structures. Additionally, both looped and linear PDMS coated stainless steel mesh/polyester fibers show efficient separation of oil/water mixture.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Wei-Liang Chen, Chih-Chia Cheng, Chien-Hsing Lu, Jem-Kun Chen
Summary: This study designs a novel sandwich-structured capacitor that reduces the absorption time of pollutants using dielectrophoresis force. By coating graphene oxide on polystyrene microspheres as adsorbents and encapsulating them within the capacitor, the adsorption rate is significantly enhanced. Additionally, frequency manipulation allows for the recycling of adsorbents and concentration of dyes, minimizing secondary pollution.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)