Article
Nanoscience & Nanotechnology
Haoli Zhou, Christopher Rayer, Ariana R. Antonangelo, Natasha Hawkins, Mariolino Carta
Summary: In this study, a series of hyper-cross-linked polymers of intrinsic microporosity (PIMs) with high CO2 uptake and good selectivity were designed, synthesized, and characterized. The functionalization of the starting hydrocarbon polymers led to improved adsorption selectivity towards CO2. The insertion of functional groups resulted in a decrease in porosity but an increase in CO2 uptake and selectivity. The findings have significant implications for carbon capture and biogas upgrading.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Narendran Rajendran, Ali Husain, Saad Makhseed
Summary: Three new carbazole-containing cross-linked polymers were designed and synthesized, with two of them showing excellent CO2 adsorption performance, high specific surface area, and stability, providing a new approach for the fabrication of highly efficient microporous polymers.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
C. Sathish, S. Premkumar, Xueze Chu, Xiaojiang Yu, Mark B. H. Breese, Mohammed Al-Abri, Ala'a H. Al-Muhtaseb, Ajay Karakoti, Jiabao Yi, Ajayan Vinu
Summary: The preparation of a novel graphitic microporous carbon nitride with a tetrazine-based chemical structure and the composition of C3N5.4 using ultra-stable Y zeolite as a template and aminoguanidine hydrochloride as the CN precursor has been reported. The material exhibits a unique molecular structure with two tetrazines and one triazine rings, as well as outstanding CO2 adsorption, selective sensing over water molecules and aliphatic hydrocarbons.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Engineering, Environmental
Jian Guan, Xiangzeng Wang, Jingcheng Du, Quansheng Liang, Wen He, Ying Liu, Ji Ma, Chunwei Zhang, Jiangtao Liu
Summary: This study proposed a simple and readily processive surface modification method for PIM-1 membranes via hydrolysis, successfully functionalizing the surface and improving CO2 permeability and selectivity. The introduction of coordination sites from nitrogen atoms with zinc ions further enhanced the membrane performance.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Cheng Li, Heshan Cai, Xiaojian Yang, Fei Liu, Chunliang Yang, Peng Chen, Zheng Chen, Tianxiang Zhao
Summary: This study fabricated several novel bipyridine-based hyper-cross-linked ionic polymers (HCIPs) with hierarchical pore structure and high specific surface area. These HCIPs not only effectively adsorb CO2, but also serve as metal-free catalysts for cycloaddition of CO2 with epoxides, resulting in moderate to good yields of cyclic carbonates. This study provides a feasible strategy for the design and synthesis of structurally controllable HCIPs for the adsorption and conversion of CO2.
JOURNAL OF CO2 UTILIZATION
(2022)
Article
Chemistry, Multidisciplinary
James N. Burrow, Ryan A. Ciufo, Lettie A. Smith, Yu Wang, David C. Calabro, Graeme Henkelman, C. Buddie Mullins
Summary: Ca2+ acts as a structure-directing agent to transform melon-based carbon nitride to crystalline CaPHI with ordered pore channels, extended visible light absorption, and altered band structure as compared to KPHI. Protons can replace Ca2+ atoms in CaPHI to enhance porosity without disrupting crystal structure. The proton-exchanged PHI frameworks exhibit high adsorption affinity for CO2 and exceptional performance for selective carbon capture.
Article
Materials Science, Multidisciplinary
Fengyi Zhang, Emily K. McGuinness, Yao Ma, Yi Ren, Johannes E. Leisen, Mark D. Losego, Ryan P. Lively
Summary: PEI/AlOx/PIM-1 composites are a promising alternative with processibility, comparable CO2 capacity, and high amine efficiency. This composite is fabricated into structured adsorption contactors using PIM-1, and then reinforced with amorphous aluminum oxyhydroxide (AlOx) nanostrands via VPI. The resulting AlOx/PIM-1 is a stable, hierarchically porous support that can be loaded with 40% PEI without pore collapse.
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Engineering, Chemical
Yongchao Sun, Jingfa Zhang, Hongjin Li, Fangxu Fan, Qizheng Zhao, Gaohong He, Canghai Ma
Summary: This study introduces a new method of crosslinking to prepare polymer membranes with high gas permeability and selectivity. The crosslinked membranes showed significantly enhanced plasticization resistance, paving the way for energy-efficient gas separations.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Review
Chemistry, Multidisciplinary
Renata Avena Maia, Benoit Louis, Wanlin Gao, Qiang Wang
Summary: The efficient carbon capture and sequestration (CCS) properties of Metal-organic frameworks (MOFs) make them promising candidates for addressing CO2 emissions. Understanding the CO2 adsorption mechanisms in these porous materials is crucial for further improving their performance.
REACTION CHEMISTRY & ENGINEERING
(2021)
Article
Chemistry, Physical
Shuainan Xu, Yehao Jin, Rui Li, Meixia Shan, Yatao Zhang
Summary: The study demonstrates the great potential of PIM-1 in adsorption and separation, by modifying it into AOPIM-1/Alg composite hydrogel beads which show excellent adsorption performance and selectivity for cationic dyes like malachite green. The adsorption process of MG was systematically investigated, revealing that the AOPIM-1/Alg beads are efficient, up-and-coming, and recyclable adsorbents.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Orit Cohen, Kristina Vetlitsyna-Novikova, Hila Toledo, Michael S. S. Silverstein
Summary: PolyHIPEs with high internal phase emulsion (HIPEs) templates were synthesized using PIM-like linear polymers. The addition of cross-linking comonomer resulted in monoliths with low density and highly interconnected structures. These polyHIPEs showed high adsorption capacity for cationic dyes.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Polymer Science
Ali Hayek, Abdulkarim Alsamah, Yasser A. Shalabi, Qasim Saleem, Melhan M. Ben Sultan, Rashed H. Alhajry
Summary: This paper reports the preparation of a series of block copolymers of poly(imide-oxadiazole)s and measures the pure and mixed-gas separation properties of their corresponding membranes. The results show that these polymers exhibit high permeability and selectivity under high-pressure conditions, surpassing many other glassy polymers.
Article
Chemistry, Applied
Entesar Al-Hetlani, Mohamed O. Amin, Ariana R. Antonangelo, Haoli Zhou, Mariolino Carta
Summary: This study investigates the removal of TCAs from wastewater using four polymeric networks based on triptycene and triphenylbenzene. The results show that sulfonic acid modified polymers tolerate higher concentrations of TCAs and follow pseudosecond-order kinetics and Langmuir isotherm models. The presence of coexisting ions affects the adsorption affinities, with a greater decrease observed using hydrocarbon-based polymers. Additionally, the study proposes a potential mechanistic pathway for the adsorption of these pharmaceuticals by the polymers.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Review
Polymer Science
Hong Ye, Caili Zhang, Chaowei Huo, Bingyu Zhao, Yuanhao Zhou, Yichen Wu, Shengpeng Shi
Summary: This paper provides a comprehensive and critical review on the recent research progress of Polymers of Intrinsic Microporosity (PIMs) in the application of liquid separation and purification, highlighting their use in membrane separation and adsorption. The importance of material structure and modification on separation performance is emphasized, and potential new research directions are mentioned. The paper concludes by highlighting the excellent separation efficiency and stable operation characteristics of PIMs in liquid separation and purification, as well as their attractive and broad development prospects.
Article
Energy & Fuels
Kristina Ariskina, Guillaume Galliero, Amael Obliger
Summary: This study examines the impact of the flexibility of kerogens' microstructure on the transport of adsorbed CO2. It develops a free volume model that takes into account the adsorption-induced swelling exhibited by flexible kerogen structures. The study shows that the swelling increases the free volume accessible to CO2 molecules, leading to faster diffusion as the fluid loading increases. The diffusive nature of transport suggests that the self-diffusion coefficient can be used as a proxy for the collective diffusion coefficient. The study also demonstrates the applicability of the free volume model to the transport of light alkanes and mixtures, simplifying transport modeling for geological applications.
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.