EUROPEAN POLYMER JOURNAL
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2026
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IF 6.8
Yunhang Zhu,Yang Ke,Feiyan Lu,Hongna Jiang,Qingting Liu,Xudong Fu,Rong Zhang,Shengfei Hu,Gang Xiao,Feng Zhao,Xiao Li,Jun Yang
High-temperature proton exchange membranes (HT-PEMs) suffer from an unavoidable trade-off between proton conductivity and mechanical strength under wide-temperature and anhydrous environments. Herein, copolymerized DA-PBI/SPEEK composite membranes are fabricated via hydrogen-bond-driven interphase engineering. The sulfonic acid groups of SPEEK form intense acid-base pairs with imidazole and amino sites on DA-PBI, the synergistic effects of flexible chain segments and intermolecular hydrogen bonding significantly enhance polymer miscibility and construct a robust acid-base interaction network. Quantum chemical calculations and charge density difference (CDD) analysis confirm that the nitrogen active sites of DA-PBI anchor phosphoric acid via electronic rearrangement, which remarkably lowers the energy barrier for proton migration. The optimal membrane achieves a tensile strength of 130 MPa (3.25 times that of pristine SPEEK) and a peak power density of 0.536 W cm −2 (1.85 times that of pristine SPEEK) at 160 °C. This multi-scale strategy combining molecular chain tailoring, interfacial modulation, and electronic structure optimization resolves the conductivity-mechanical property dilemma of PBI-based membranes, offering a promising route to advanced anhydrous HT-PEMs.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Chen Li,Ketong Song,Chunxiao Hao,Wanting Liang,Xiaoyun Li,Wenjin Zhang,Ying Wang,Yuefei Song
A novel anti-fouling cation exchange membrane (CEM) of sulfonated polybenzimidazole (S-PBI) was fabricated by the polymer bulk grafting modification of poly (4,4′-diphenyl ether-5,5′-bibenzimidazole) with sodium styrene sulfonate . FTIR, TGA , XPS, SEM and AFM were used to characterize membrane properties and the results showed that the ion exchange capacity and hydrophilicity of S-PBI increased with increased degrees of grafting and the electric resistance decreased accordingly. When the mass ratio of O-PBI/SSS was 1:4, the electric resistance of S-PBI-4.0 was 4.5 Ω·cm 2 , while the ion exchange capacity was 2.3 meq/g. The ED experiment with the S-PBI-4.0 membrane exhibited good desalination rate (>96 %), high current efficiency (80.73 %) and low energy consumption (1.13 kW·h/kg), which were very close to the results of a commercial CEM (Neosepta CMX). What's more, because of its good hydrophilicity, the S-PBI-4.0 membrane had better anti-fouling ability than Neosepta CMX, which was manifested as less resistance increase after membrane fouled by bovine serum albumin and smaller resistance after membrane cleaned by deionized water . These results demonstrate that the S-PBI-4.0 membrane is an appropriate candidate CEM and helpful to expand the application of ED in high-salinity organic industrial wastewater treatment .
研究领域:
材料科学
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环境工程
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JOURNAL OF MEMBRANE SCIENCE
·
2025
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IF 9
Jiyuan Zhang,Binghui Liu,Hanlin Chen,Te Hu,Shouhai Zhang,Shuhua Chen,Chengji Zhao,Xiuping Li
Phosphoric acid (PA) doped polybenzimidazole (PBI) membranes are among the most promising high-temperature proton exchange membranes (HT-PEMs) due to their excellent mechanical properties and high conductivities at high PA doping levels. However, PA leaching leads to reduced conductivity at high temperatures. To solve this problem, this study successfully prepared a series of novel starch-PBI composite membranes (St-OPBI-GO). FT-IR and XRD results indicate that starch constructs dense hydrogen bond networks within the membranes. The membranes exhibit excellent proton conductivity at a comparatively low PA doping level (3.04 mol H 3 PO 4 ), reaching up to 0.19 S/cm. PA retention results show that the membranes maintain nearly unchanged high proton conductivity at 200 °C despite PA leaching. Starch should facilitate and stabilize proton conduction by forming extensive hydrogen bonds with PA molecules and PBI chains through its abundant hydroxyl groups, which is confirmed by Molecular dynamics (MD) simulation results. Moreover, the St-OPBI-GO membranes exhibit outstanding oxidative stability (remaining unbroken after 120 h of Fenton’s test) and mechanical strength. Further, in the single cell test, the power density reaches up to 557.45 mW cm -2 at 220 °C, meeting the requirements for HT-PEMs use. This study provides an effective approach to solve the conductivity decline problem caused by PA leaching.
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JOURNAL OF MEMBRANE SCIENCE
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2025
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IF 9
Huiling Wu,Liyin Fu,Xiang Li,Yongfeng Zhang,Tianjia Chen
The development of membranes capable of directly separating H 2 by harnessing the residual heat from the water-gas shift reaction represents a significant challenge in the field of membrane separation technology. In this study, an asymmetric preparation strategy was employed to construct porous membranes with ultra-thin dense layers for achieving high-efficiency H 2 separation. We developed a novel ultra-thin polymer-based dual-phase hydrogen separation membrane with a porous architecture (p-OPBI-PANI), designed for operation under elevated temperatures ranging from 120 to 300 °C. This membrane achieved an exceptionally thin dense layer of 200 nm through a non-solvent-induced phase separation (NIPS) process utilizing dibutyl phthalate (DBP), while polyaniline (PANI) nanofillers were strategically incorporated into the polybenzimidazole (PBI) matrix to enhance structural and functional properties. Systematic modulation of non-solvent and nanofiller concentrations enables precise optimization of membrane morphology and separation performance. The optimized membrane demonstrates remarkable H 2 permeance (120 GPU) coupled with exceptional H 2 /N 2 selectivity of 205, surpassing conventional polymeric membranes. Furthermore, it exhibits robust operational stability in complex gas environments containing sulfur compounds (e.g., H 2 S) and high humidity, maintaining consistent performance over prolonged operation (>100 h). This work introduces a versatile fabrication paradigm for asymmetric-polymer hydrogen separation membranes, offering significant potential for hydrogen purification in industrial applications under harsh operating conditions.
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Materials Today Chemistry
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2022
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IF 7.613
P.K. Zhou,K.Y. Song,L.L. Zong,Z.C. Yang,H.H. Li,Z.R. Chen
The design of functional composites with desired film crystallinity and definite switching mechanism is the key to achieve high performance multilevel memorizers. Three aggregation-induced emission (AIE) molecules containing different azobenzol (Azo) groups on tetraphenylethylene (TPE) were synthesized and embedded into polybenzimidazole (PBI) to prepare AIE@PBI composites, which were further fabricated as FTO/TPE-Azo-n@PBI/Ag (n = 01, 02, 04) devices with well-defined crystalline characteristics. These devices can demonstrate clear ternary memory performances, among which TPE-Azo-04@PBI-based one exhibited the best performance with the current ratio of 1:10 4.2 :10 6.7 for “OFF”, “ON1”, and “ON2” states. The ternary memory mechanism can be designed as the combination of aggregation-induced current/conductance (AIC) and packing conformational change-induced charge transfer in TPE-Azo-n, which were verified by UV–Vis, in-situ XRD , and single-crystal structural determinations and theoretical calculations. The trend of ternary memory performance improved by increasing Azo groups on TPE can be attributed to the larger steric hindrance due to the more Azo groups, which can inhibit their aggregations and packing conformational change in PBI-confined space. Specially, this kind of devices can present high-temperature tolerance of 350 ° C. The verified mechanism in this work might provide a practicable model for the design of new high-density memorizers with good environmental tolerance. The current ratio of OFF/ON1/ON2 increases with the Azo.
研究领域:
材料科学
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光电功能材料
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Solar RRL
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2025
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IF 4.7
Peng Gao,Jianxin Xu,Zhanfei Zhang,Lijie Sun,Wenhua Li,Yonggang Guo,Kai Wang,Dayong Qiao,Binghe Ma,Weizheng Yuan,Tao Ye
Perovskite-silicon tandem solar cells (PSTSCs) represent one of the most promising candidates for next-generation photovoltaics, offering the potential to surpass the Shockley–Queisser efficiency limit of single-junction devices due to their tunable bandgap and strong light absorption. However, residual PbI 2 formed from incomplete crystallization in the perovskite top subcell introduces nonradiative recombination centers, structural inhomogeneity, and interfacial instability, thereby limiting device performance. In this work, we proposed a chemical polishing strategy based on a dimethyl sulfoxide and chlorobenzene mixed solvent system that selectively removes surface PbI 2 without disrupting the perovskite lattice. This approach effectively reduces trap-state density, promotes grain boundary fusion, enhances photoluminescence intensity, and extends carrier lifetime. As a result, the fabricated PSTSCs achieve a certified power conversion efficiency of 31.71%, accompanied by an increase in open-circuit voltage from 1.821 V to 1.839 V and a marked suppression of interface-related recombination losses. This study highlights a facile yet effective interfacial engineering strategy that mitigates residual PbI 2 and supports the development of high-efficiency, stable perovskite-silicon tandem photovoltaics.
研究领域:
光伏技术
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材料科学
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纳米技术
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化学工程
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DESALINATION
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2025
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IF 9.8
Xuyang Liu,Jian Zhang,Huanping Wu,Fuzhi Li,Zhihui Liu,Yingnan Ma,Jianqiang Meng
Membrane fouling significantly limits the application of membrane separation technology in the treatment of textile dyeing wastewater. In this study, a loose nanofiltration membrane made of polybenzimidazole (PBI) with enhanced antifouling and high-efficiency dye/salt separation capabilities was developed through Ag@UiO-66-NH₂ immobilization and hydrophilic polymer brush grafting. Initially, Ag@UiO-66-NH₂ nanoparticles, possessing antibacterial properties, were incorporated into the PBI base membrane. Subsequently, a brush-like antifouling layer was constructed on the membrane surface by grafting linear polypropylene glycol (PPG) and polyethylene glycol (PEG). Experimental results revealed that the grafting modification substantially improved the membrane's performance: the rejection of the small-molecule dye Methyl Red increased from 16.8 % to 59.6 %, and the membrane surface hydrophilicity was enhanced, leading to a slight improvement in pure water flux. Additionally, the grafted layer effectively suppressed the adsorption of bovine serum albumin, with a flux recovery rate remaining above 90 % after four fouling cycles. Furthermore, the membrane exhibited rejection of <10 % for inorganic salts (Na 2 SO 4 , NaCl, MgSO 4 and MgCl₂), achieving efficient separation of dyes and salts. In tests with simulated textile dyeing wastewater, the membrane's rejection for industrial dyes remained stable at over 90 %, and the addition of surfactants and auxiliaries had no significant impact on its performance. This study shows that the combination of immobilizing MOF nanoparticles with controlled release properties of biocides and grafting hydrophilic polymer brush can effectively improve the separation efficiency and antifouling performance of the membrane, which provides a new method for the treatment of complex textile printing and dyeing wastewater.
研究领域:
环境科学
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材料科学
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CHEMICAL ENGINEERING SCIENCE
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2026
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IF 5.1
Yingnan Ma,Zixuan Guo,Juan Chen,Shuyan Meng,Zijian Zhang,Jihong Tian,Yanxin Hu,Yijun Fang,Yawen Zhu,Panliang Zhang
High-temperature proton exchange membranes had attracted considerable interest for electrochemical devices such as fuel cells. However, it remained challenging to simultaneously achieve high proton conductivity, effective acid retention, and robust dimensional stability. To address the limitations of conventional filler incorporation, which was insufficient to realize both efficient acid utilization and the construction of continuous proton-conduction networks, we developed a PBI-based mixed-matrix membrane (MMMs) via the in-situ growth of MIL-101(Fe). The in-situ introduced MIL-101(Fe) not only formed a well-dispersed MOFs framework with excellent interfacial compatibility, but also reconfigured the spatial distribution and physicochemical state of phosphoric acid within the membrane, transforming it from disordered accumulation into a continuous hydrogen-bonded pathway for cooperative proton transport. As the extent of MIL-101(Fe) in-situ growth increased, the acid distribution became more uniform, the proton-conduction pathways became more interconnected, the transport resistance was significantly reduced, and the conductivity was markedly enhanced. Meanwhile, the confinement effect of the MOFs channels and their interfacial nanodomains on phosphoric acid effectively suppressed acid loss and substantially improved the dimensional stability of the membrane. This study demonstrated that in-situ grown MIL-101(Fe) not only increased acid accommodation, but more importantly enabled microenvironment regulation and reconstruction of the proton-transport network, thereby providing new insight into the design of high-performance and durable high-temperature proton exchange membranes.
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JOURNAL OF MEMBRANE SCIENCE
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2026
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IF 9
Zheng Zhao,Hui-Biao You,Bo Jiang,Li-Na Jia,Hui-Tao Yu,Jin-Xiao Bao,Gao-Fei Pan
Here, A two-dimensional network polybenzimidazole (PBI) membrane was synthesized through metal Ce-ligand bond between the cerium trifluoromethanesulfonate and the modified PBI, which was synthesized by introduce the 2,2′-biquinoline-4,4′-dicarboxylic acid and 2,2′-bipyridine-4,4′-dicarboxylic acid into traditional m -PBI membranes. The two-dimensional network PBI membrane (named CO-PBI) demonstrates enhanced toughness, phosphoric acid (PA) retention, chemical stability. Upon PA doping, the CO-PBI membrane achieves a tensile strength of 42.42 MPa, a proton conductivity of 0.162 S cm −1 at 160 °C, and a power density of 484.77 mW cm −2 which is representing a 2.45 times enhancement compared to the pristine PBI membrane. This study presents a viable structural design framework to comprehensively improve the performance of PA-PBI proton exchange membranes.
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EUROPEAN POLYMER JOURNAL
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2016
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IF 3.485
Quan Yuan,Guo-Hua Sun,Ke-Fei Han,Jing-Hua Yu,Hong Zhu,Zhong-Ming Wang
A series of copolymers, which can also be regarded as ABPBIs containing phenoxyl in the main chain, were synthesized by copolymerization of two kinds of self-polycondensation monomers: 3,4-diaminobenzoic acid (DABA) and 4-(3,4-diamino-phenoxy)-benzoic acid (DPBA). The phenoxyl-containing ABPBIs exhibit better processability and acid stability than original ABPBI, despite their affinities towards acid decrease with the addition of phenoxyl moieties. By adjusting the phenoxyl content of the polymer, we made a tradeoff between acid doping levels and proton conductivity, with mechanical properties. The optimal polymer therein, PO-AB-50 (50 M percentages of DPBA in total monomers), exhibits considerable proton conductivity (53.47 mS/cm at 160 °C) and tensile strength (1.9 MPa) after doped with phosphoric acid. In addition, the oxidation stability, water uptake and swell ratio properties of the polymers were also improved with the introduction of phenoxyl moieties.
研究领域:
材料科学
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化学工程
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Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 37
·21112-21119
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IF 10.733
Lei Hu,Li Gao,Changkun Zhang,Xiaoming Yan,Xiaobin Jiang,Wenji Zheng,Xuehua Ruan,Xuemei Wu,Guihua Yu,Gaohong He
“Fishnet-like” ion-selective nanochannels for advanced membranes are designed for the first time to enhance the efficiency and durability of flow batteries. A fishnet-like structure with 10 nm ion-transport channels is achieved by tuning the hydrophobic/hydrophilic nanophase separation structure of the membrane, in which absorbed water molecules are restricted around hydrophilic polyethylenimine (PEI) chains by hydrophobic polybenzimidazole (PBI). Owing to the size-exclusion and high-density protonated amine groups of PEI fishnets, the membrane exhibits ultralow VO2+ permeability without sacrificing its ion conductivity, ensuring high energy efficiency of vanadium flow batteries. Furthermore, the demonstrated vanadium flow battery with the fishnet-based membrane steadily run at 120 mA cm−2 over 2000 cycles (about 120 days). These findings provide a new strategy for the design of high-performance and cost-effective membranes for vanadium flow battery applications.
研究领域:
材料科学
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电化学
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能源存储
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高影响因子
Energy Storage Materials
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2022
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IF 20.831
Denghua Zhang,Xihao Zhang,Chao Luan,Biao Tang,Zhongyu Zhang,Nianwen Pu,Kaiyue Zhang,Jianguo Liu,Chuanwei Yan
Thin membranes with high conductivity are of great importance for high power density vanadium flow batteries (VFBs), however, the trade-off between conductivity and ion selectivity limits their further development. Herein, an ultrathin composite membrane (∼10 μm) enabled by a zwitterionic interface between conductive polybenzimidazole (PBI) and porous polyethylene (PE) substrate is proposed to break the trade-off, and greatly enhance the power density of a VFB. The zwitterionic interface is engineered by the covalent reaction between polydopamine and zwitterionic sulfonated 3-dimethylaminopropylamine (DMAPAPS). The as-fabricated composite membrane features excellent mechanical properties and high dimensional stability. Furthermore, the zwitterionic interface facilitates proton transportation while blocking vanadium-ion permeation . More importantly, the ion selectivity of the ultrathin membrane is nearly three times higher than the pure PBI membrane (i.e., 2.71 × 10 4 vs. 1.09 × 10 4 S min cm −3 ). As a result, a VFB assembled with the ultrathin membrane demonstrates a superior energy efficiency of 78.7% at 300 mA cm −2 , and achieves an excellent cycle stability over 500 cycles at 300 mA cm −2 . Therefore, the engineering of zwitterionic interface provides a promising strategy in the development of ultrathin composite membrane for high power density VFBs.
研究领域:
材料科学
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电化学
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能源存储
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高影响因子
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