Article
Engineering, Chemical
Do Young Kim, Seungbo Ryu, Hyoung-Juhn Kim, Hyung Chul Ham, Hyuntae Sohn, Sung Pil Yoon, Jonghee Han, Tae-Hoon Lim, Jin Young Kim, Seung Woo Lee, Chang Won Yoon, Sun Hee Choi
Summary: In this study, a hydrogen-selective membrane based on asymmetric polybenzimidazole (PBI) demonstrated high permeability and permselectivity. The addition of LiCl increased polymer chain density, solution concentration, and stability of the membrane structure.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Green & Sustainable Science & Technology
Lie Meng, Teruhiko Kai, Shin-ichi Nakao, Katsunori Yogo
Summary: This study aims to explore the possibility of achieving a CO2 capture ratio >95% and CO2 purity >95% using currently available CO2-selective polymer membranes in a gas-separation unit. A mathematical model was developed to investigate the effect of membrane characteristics and operating parameters on CO2 capture performance. The simulation results reveal optimal conditions for high-performance CO2 capture and highlight the potential of facilitated transport membranes in CO2 removal in industrial processes.
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2023)
Article
Nanoscience & Nanotechnology
Omid T. Qazvini, Shane G. Telfer
Summary: MUF-16 is a hydrogen-bonded water-stable microporous material with high CO2 adsorption and low affinity for other gases, which can maintain its performance over multiple adsorption/desorption cycles.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Engineering, Chemical
Natsayi Chiwaye, Thokozani Majozi, Michael O. Daramola
Summary: The study introduces a superstructure-based optimisation model for the CO2 capture process using N-2-selective and CO2-selective membranes. By automatically selecting membranes for each stage, a hybrid membrane CO2 capture process is achieved, leading to significant reduction in capture cost.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Energy & Fuels
Hani Shazwani Mohd Suhaimi, Choe Peng Leo, Abdul Latif Ahmad
Summary: This study breaks through the limitations of the selectivity-permeability trade-off boundary in hydrogen separation by incorporating Pd nanoparticles into PBI membranes. The Pd nanoparticles blended into PBI membrane show improved ideal H-2/CO2 selectivity and surpass the upper bound Robeson plot at high temperatures.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Engineering, Chemical
Yang Jiao, Mengdi Liu, Qi Wu, Peijun Zheng, Wei Xu, Bangjiao Ye, Hongjun Zhang, Ruilan Guo, Shuangjiang Luo
Summary: In this study, high-performance polybenzimidazole (PBI) membranes were developed with well-defined microporosity and size-sieving ability for helium and hydrogen recovery. The incorporation of hierarchical triptycene units and polyprotic acid doping resulted in significantly enhanced gas permeability and selectivity compared to previous PBI membranes. The triptycene-based polybenzimidazole (TPBI) composite membranes exhibited the highest gas selectivities among existing polymeric gas separation membranes, making them highly attractive for helium and hydrogen separation.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Thermodynamics
Sanehiro Muromachi
Summary: This study investigates the CO2 capture properties of semiclathrate hydrates formed with different salts, showing that they almost exclusively capture CO2. Among the salts, TBPB exhibits superior gas capture performance, while TBAC captures the least amount of CO2.
Article
Chemistry, Physical
Jong Geun Seong, Jeremy C. Lewis, John A. Matteson, Erica Craddock, Ulises Martinez, Harshul Thakkar, Angelica D. Benavidez, Kathryn A. Berchtold, Rajinder P. Singh
Summary: Polymer membrane carbonization is a promising strategy for obtaining carbon molecular sieve (CMS) membrane materials with tailorable cavity size distributions. In this study, highly O-2 permselective CMS hollow fiber membranes (HFMs) derived from rigid PBI materials were fabricated and evaluated for O-2/N-2 separation performance.
Article
Materials Science, Multidisciplinary
Saheed Bukola, Ashlee Vise, Yuanshun Li, Gabriel Goenaga, Thomas A. Zawodzinski, Jeffrey L. Blackburn, Bryan Pivovar
Summary: A post-functionalization strategy was reported to improve the selectivity and high proton conductivity of PBI-co membranes. The membranes exhibited high proton conductivity, electromigration crossover mitigation, and inhibition of diffusion-driven vanadium crossover. Single-cell vanadium flow battery testing confirmed state-of-the-art battery performance.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Thermodynamics
Calin-Cristian Cormos
Summary: This study assesses the techno-economic and environmental implications of decarbonized green hydrogen generation using biomass gasification. The results indicate that green hydrogen production from decarbonized biomass gasification has promising potential, with high energy conversion efficiency, lower energy and cost penalties, and negative carbon emissions.
Article
Green & Sustainable Science & Technology
Maytham Alabid, Cristian Dinca
Summary: This study aims to improve CO2 capture technologies and enhance the sustainability of biomass as an energy source. By utilizing three stages of the polymer membrane process, the efficiency of CO2 capture can be effectively increased.
Article
Engineering, Chemical
Yang Han, W. S. Winston Ho
Summary: This review discusses the fundamentals of CO2/gas separation in polymeric membranes and explores the opportunities and challenges for various applications such as post-combustion carbon capture, hydrogen purification, and gas sweetening. It also highlights emerging polymeric membrane materials and promising candidates for CO2 separation applications, while comparing permeability-selectivity data against their upper bounds in 2008 and 2019.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Engineering, Chemical
Teng Zhou, Huaiwei Shi, Xuechong Ding, Yageng Zhou
Summary: A systematic study was conducted to develop a model for predicting the vapor-liquid equilibrium of the CO2-H2-IL ternary system, and an optimization-based computer-aided ionic liquid design problem was formulated and solved to identify the best ILs for pre-combustion carbon capture processes. The hydroxyl-ammonium and hydroxylimidazolium bis(trifluoromethylsulfonyl)amide ILs were found to be the most promising solvent candidates.
CHEMICAL ENGINEERING SCIENCE
(2021)
Article
Energy & Fuels
Gizem Nur Bulanik Durmus, C. Ozgur Colpan, Yilser Devrim
Summary: In this study, the purification of hydrogen from a H-2:CO2:CO mixture using a high-temperature electrochemical purification system was investigated. It was found that the operating temperature had the greatest impact on performance, with hydrogen purity reaching 99.999% at 160 degrees C. Gas mixtures containing CO showed better performance at 180 degrees C, while the gas mixture without CO performed best at 160 degrees C.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Biochemistry & Molecular Biology
Yang Han, W. S. Winston Ho
Summary: A membrane-based system with a retentate recycle process and an enriching cascade was studied. The system can achieve >90% carbon capture from coal flue gas. Through the use of a highly CO2-selective facilitated transport membrane (FTM), the CO2 separation efficiency from the CO2-lean gases can be enhanced, resulting in a high capture degree. By combining the enriching cascade and retentate recycle process, an overall 99% capture degree can be achieved with a relatively low capture cost.
Article
Polymer Science
Yuanzhang Jiang, Xuyi Wang, Yanting Han, Dakai Gong, Yingchun Gu, Lin Tan
Summary: In this study, FeCl3 and poly(acrylic acid) (PAA) were doped into waterborne polyurethanes (WPUs) to create multifunctional materials with self-healing and antimicrobial properties. WPU/Fe/PAA-5.5, containing 5.5 wt % PAA, exhibited excellent mechanical properties, strong self-healing capabilities, and an impressive antimicrobial rate of over 90%. These supramolecular films were also highly recyclable through hot-pressing.
Article
Polymer Science
Longyu Tian, Min Wang, Guangming Liao, Baoliang Liu, Sujuan Zhang, Yucheng Sun, Zhen Meng, Jintao Zhang, Zaijun Lu
Summary: Two kinds of benzoxazine monomers were synthesized and used to prepare polybenzoxazine anion exchange membranes (AEMs) with quaternary ammonium functionalization. The LQPBZ AEM exhibited better ion conductivity and alkaline stability.
Article
Polymer Science
Claire A. Lemarchand
Summary: This study investigates the shock behavior of three different polymers through molecular dynamics simulations. The results reveal specificities in the shock behavior of polymers, including deviations from the linear relation between shock velocity and particle velocity, as well as differences in shear stress relaxation behind the shock front. It is found that the deviation of the Hugoniot locus is related to the change in the relative contribution of bonding and non-bonding potential energies, while polymers with higher glass transition temperatures exhibit slower shear stress relaxation.
Article
Polymer Science
Zengquan Liu, Xiaochun Yin, He Zhang, Shuo Gao, Qinglin Kuang, Yanhong Feng
Summary: A powder solid-state extension (PSSE) technology was proposed to address the high melt viscosity issue of UHMWPE. By uniaxial extension and sintering in the solid state, a highly self-reinforced material was prepared. X-ray diffraction and scattering techniques were used to study the structural evolution during the PSSE process, and a solid-phase induced transformation model was established.
Article
Polymer Science
Zhike Li, Anyu Luo, Rui Zhou, Xin Li, Haiyan Li
Summary: A novel high temperature resistance IL@SiO2 nanocapsules were successfully prepared and their friction and wear properties in PA6 composites were studied. The addition of IL@SiO2 nanocapsules reduced the friction coefficient and wear rate without affecting the mechanical properties of PA6. The synergy between the IL core and SiO2 wall in the nanocapsules improved the self-lubricating performance of the PA6 composites.
Article
Polymer Science
Xin Liu, Xuhong Guo, Qi Liao
Summary: In this study, an algorithm for accurately estimating viscosity is developed using molecular dynamics simulations and the Green-Kubo formula. This algorithm can be applied to complex systems with long correlations, such as macromolecular and biological simulation systems.
Article
Polymer Science
Hao Pu, Yun-Lei Hou, Jing -Zhou Chen, Dong -Lin Zhao
Summary: The use of modified graphene improves the interfacial adherence of carbon fibers to epoxy resin, resulting in enhanced interfacial and bending properties of CF and matrix in CF/EP composites, as well as increased interlaminar shear strength and flexural strength.
Article
Polymer Science
Wei-Chung Ke, Jin-Wei Lin, Manohar Reddy Busireddy, Yueh-Hsing Lee, Jiun-Tai Chen, Chain-Shu Hsu
Summary: This study introduces a crosslinkable monomer, TAIC, to synthesize three crosslinked polyimide films, which exhibit improved thermal, mechanical, and dielectric properties. The introduction of TAIC enhances the tensile strength, reduces the dielectric constant and dielectric loss, and decreases the coefficient of thermal expansion of the polyimide films.
Article
Polymer Science
Alex Kwasi Kumi, Ruiling Fan, Ye Chen, Yumei Zhang
Summary: The difference in leaching of amylopectin from cellulose/amylopectin/1-butyl-3-methylimidazolium chloride ([Bmim][Cl]) blends during regeneration in water and aqueous ethanol has been studied. Molecular dynamics simulations showed that the dissolution and regeneration mechanisms of amylopectin in [Bmim][Cl] are similar to cellulose in ionic liquids. Water regeneration leads to weak electrostatic interactions, resulting in high leaching of amylopectin. In contrast, ethanol-water interactions enhance electrostatic interactions among amylopectin chains, limiting amylopectin leaching in aqueous ethanol.
Article
Polymer Science
Xi Zeng, Junwei Zhou, Junbiao Peng, Chunsheng Zhang, Danling Wang, Yihu Song, Qiang Zheng
Summary: This study utilizes an oligomer deep eutectic solvent (DES) based on polyethylene glycol to regulate the vulcanization kinetics of rubber. The results show that the DES can accelerate vulcanization at low temperatures without affecting the crosslinking density and Mullins effect.
Article
Polymer Science
Qianqian Yue, Yongfei Peng, Xingjian Liu, Aihua He, Huarong Nie
Summary: The addition of metal deactivators can effectively suppress the aging of TBIR, prolong its lifespan, and have no negative effects on its physical and processing properties. These research findings are of great importance for improving the stability and aging resistance of polymers.
Article
Polymer Science
J. Gomez-Caturla, J. Ivorra-Martinez, R. Tejada-Oliveros, V Moreno, D. Garcia-Garcia, R. Balart
Summary: This work focuses on the development of environmentally friendly PLA formulations by using different esters derived from geraniol as plasticizers. The results show that these esters have good compatibility with PLA, and they can effectively enhance the elongation and plasticity of PLA, reduce its glass transition temperature, and slightly improve its water absorption capabilities.
Article
Polymer Science
Dandan Li, Zhaohui Lu, Zhao Ke, Ke Xu, Fengna Dai, Youhai Yu, Guangtao Qian, Chunhai Chen
Summary: In this study, cross-linked PI aerogel membranes with low dielectric constant and high moisture resistance were prepared by co-polymerization and scraping coating technology. The incorporation of fluorinated blocks and benzimidazole ring structures resulted in novel PI aerogel membranes with fascinating dielectric properties and outstanding moisture resistance.
Article
Polymer Science
Zhaoyang Chu, Qing Zhang, Haihua Luo, Han Zhou, Fapei Zhang, Wei Chen, Wenhua Zhang
Summary: Multi-physical fields solution processing strategy is a universal and facile method for preparing various conjugated polymer films and high-performance devices. In this study, we employed a combined microfluidic flow and ultrasonication strategy (FU) for processing CP solutions, and found a pronounced synergetic effect in promoting the pre-ordering of chains in solution. The conformation order and anisotropy of the solution were revealed through various characterizations. A non-classical nucleation model for polymer crystallization in non-equilibrium solution processing was confirmed. The roles of microfluidic flow and ultrasonication in chain aggregation and crystallization were addressed through multi-physical simulations. Compared to pristine solutions, the FU strategy showed improved solution anisotropy and crystallization kinetics, resulting in higher crystallinity in films and increased mobilities in OFET devices. The FU processing strategy provides a universal approach for regulating chain conformation and aggregation in conjugated polymer solutions.