MACROMOLECULAR RESEARCH
·
2017
·Vol. 25
·期 8
·817-825
·
IF 1.405
Xu Yiting,Huang Jiamei,Li Yuntong,Wang Meijie,Cao Ying,Yuan Conghui,Zeng Birong,Dai Lizong
A novel zwitterionic hybrid amphiphilic copolymer containing polyhedral oligomericsilsesquioxane (POSS), and poly(methacrylate isobutyl POSS)- b -poly (3-dimethyl(methacryloyloxyethyl) ammonium propane sulfonaten- co -2-(diethylamino) ethyl methacrylate- co -styrene) (PMAiBuPOSS- b -P(DMAPS- co -DMAEMA- co -St)), was prepared by the ring open reaction of 1, 3-propane sultone with tertiary amine on the precursor polymer. This hybrid copolymer could self-assemble into spherical micelle with a relatively narrow size distribution. The micelle size exhibited a great dependence on pH, as the size of the micelles was of evidently decreases with the increase of the pH value. Controllable release of pyrene from the micelles was investigated by fluorescent emission spectra. Micelles with more zwitterionic units would lead to less pyrene release and longer equilibrium time. The protein adsorption resistance of the micelles was tested by mixing them with fetal bovine serum. The antifouling ability was improved by increasing the number of zwitterionic units as well as decreasing the number of DMAEMA units. This novel hybrid amphiphilic random copolymer with the pH-responsive and anti-protein-fouling ability, can be potentially used for drug carriers for controlled release.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Mingzhu Liu,Biyu Jin,Qinghua Zhang,Xiaoli Zhan,Fengqiu Chen
Herein we report a new high ionic conductivity and wide electrochemical window solid polymer electrolyte (SPE), which is developed via grafting sulfobetaine zwitterion (ZI) and poly (ethylene oxide) (PEO) chains on highly flexible polysiloxane backbone followed by crosslinking of tri(ethylene glycol) divinyl ether. The synergistic effect of zwitterion and PEO endows the SPE with an excellent ionic conductivity of 3.39 × 10 −4 S cm −1 and the wide electrochemical stable window of 5.0 V (vs. Li/Li + ) at room temperature. LiFePO 4 /Li half-cells with as-prepared solid polymer electrolyte present a high initial discharge capacity of 155 mAh g −1 and superior cycle stability with a capacity retention of 93% at 0.1 C after 100 cycles at 30 °C. In addition, LiNi 0.5 Mn 1.5 O 4 /Li half-cells employing such polymer electrolyte also deliver excellent cycle performance and stability. The above results indicate that the designed zwitterionic SPE appears to be a potential candidate for application in all-solid-state lithium-ion batteries.
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2019
·
IF 7.015
Si Zhang,Quang Viet Ly,Long D. Nghiem,Jing Wang,Jianxin Li,Yunxia Hu
Membrane fouling can hinder the widespread application of thin film composite (TFC) reverse osmosis (RO) for water treatment. This study evaluated a novel zwitterion-grafted TFC RO as a mean to address organic fouling for water reclamation. The membrane exhibited the best permeability at the grafting condition of 45 °C in 1 h. This modified membrane consistently possessed improved antifouling ability irrespective of organic foulants. Among individual foulants, surfactant Dodecyl Trimethyl Ammonium Chloride (DTAC) posed the worst fouling potential due to its low molecular weight and positive charge, whereas fouling induced by other substances were relatively analogous and minor. In the mixture of DTAC and proteins, the former played a key role in governing the membrane fouling. While, their interplay affected membrane fouling, the fouling extent varied upon the membrane materials. The extended Derijaguin, Landau, Verwey and Overbeek (xDLVO) theory was unable to fully describe the interactions between surfactant foulants and the membrane materials. The complementary use of quartz crystal microbalance with dissipation (QCM-D), otherwise, concurred the fouling potential and gave the plausible interpretation for fouling mechanisms by providing insightful information of foulant layer on the polyamide-coated sensor. This study provided critical insights of organic foulants’ behavior on TFC RO membrane and offered the promising industrial implication of the novel membrane.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2020
·
IF 5.774
Qiuyan Bi,Chao Zhang,Jiandong Liu,Xingliang Liu,Shiai Xu
A nanofiltration (NF) membrane with positive charges capable of separating Mg 2+ and Li + from high Mg/Li ratio brine was prepared by interfacial polymerization of 1, 4-bis (3-aminopropyl) piperazine (BAPP)/trimesoyl chloride monomers, and then nano graphitic carbon nitride (g-C 3 N 4 ) functionalized with zwitterion (BHC-CN) was introduced into the active layer of the fabricated membrane. Salt permeation and selectivity were improved with the increase of BHC-CN content to 0.02% in BAPP solution. The morphology and surface chemical composition of BHC-CN were detected. The surface Zeta potential test indicates that the membrane fabricated with BHC-CN is positively charged at pH < 7.33. The presence of small aggregates on the surface of the membrane may increase the effective filtering area of the membrane and thus improve the permeability. It also exhibits long-time stability and excellent separation of Mg 2+ and Li + , and the Mg/Li ratio is decreased from 73 in the feed to 1.85 in the permeation. Moreover, the resulted membrane shows good fouling resistance. In conclusion, the membrane has potential advantages in water softening and recovering Li + from brine with high Mg/Li ratio.
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2019
·
IF 7.015
Muhammad Irfan,Tingting Xu,Liang Ge,Yaoming Wang,Tongwen Xu
Monovalent cation perm-selective membranes (MCPMs) with enhanced monovalent flux and the capability to reject multivalent cations are critical; however, their realization remains challenging in various industrial applications, such as seawater desalination and wastewater purification. To achieve this criterion, we designed and synthesized a series of MCPMs with a zwitterion structure comprising three quaternary ammonium groups, two carboxylic acids, and one sulfonic acid group. These functional groups act to balance the cation flux and perm-selectivity of the MCPM. The cation fluxes and perm-selectivity of the fabricated MCPMs were investigated for Na + /Mg 2+ and Li + /Mg 2+ systems. High perm-selectivities of 58.4 and 16.5 were obtained for ( P M g 2 + N a + ) and ( P M g 2 + L i + ) systems, respectively, using a QPO/DAN-SA-5 membrane. The performance of the MCPMs was compared with the state-of-art commercial monovalent cation selective membrane Neosepta TM CIMS. The influence of feed concentration and current density on the cation fluxes and perm-selectivity was examined, and the pH was measured to investigate the effect of concentration polarization and water splitting on electrodialysis . Moreover, the presence of various functional groups in the membrane matrix provided additional insights into electrostatic repulsive and interaction effects. The zwitterion structure of the MCPM was capable of tuning the cation flux and perm-selectivity. Our study provides an effective strategy for developing MCPMs with high cation flux and ion perm-selectivity.
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高影响因子
Batteries-Basel
·
2023
·Vol. 9
·期 9
·452
·
IF 4
Wenting Chen,Yikun Yi,Feng Hai,Zhendi Wu,Jingyu Guo,Xiaolu Tian,Xin Gao,Wei Tang,Mingtao Li
Ionic gel electrolyte retains the characteristics of non-volatilization, non-flammability and outstanding electrochemical stability of ionic liquid, and shows good electrochemical performance combined with the excellent characteristics of different matrix materials, which is considered to be the best choice to achieve high energy density and safety at the same time. In this paper, a flexible and self-healing ionic gel electrolyte was prepared using a solvent-assisted method based on a zteric ion (ZI) copolymer. Abundant hydrogen bonds and synergistic interaction of ions in the electrolyte system endowed it with remarkable self-healing ability. An ionic conductivity of 9.06 × 10−4S cm−1at room temperature was achieved. Moreover, the lithium-ion transference number was increased to 0.312. The ionic gel electrolyte has a self-healing function which guarantees long-term tolerance during charging and discharging. The capacity retention rate of the Li//LiFePO4battery was 96% after 155 cycles at 0.1 C at 60 °C. This polymer electrolyte is expected to solve the problem of increasing polarization, which is caused by the low lithium ions migration number in ionic liquid electrolyte. And ultimately, it gave rise to a good rate performance.
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高影响因子
Advanced Healthcare Materials
·
2024
·
IF 10
Ting Zhou,Yanzhi Dong,Xiaoyi Wang,Ruxia Liu,Ran Cheng,Jinbin Pan,Xuejun Zhang,Shao-Kai Sun
Iron oxide nanoprobes exhibit substantial potential in magnetic resonance imaging (MRI) of kidney diseases and can eliminate the nephrotoxicity of gadolinium-based contrast agents (GBCAs). Nevertheless, there is an extreme shortage of highly sensitive and renal clearable iron oxide nanoprobes suitable for early kidney damage detection through MRI. Herein, a renal clearable ultra-small ferrite nanoprobe (UMFNPs@ZDS) is proposed for highly sensitive early diagnosis of kidney damage via structural and functional MRI in vivo for the first time. The nanoprobe comprises a ferrite core coated with a zwitterionic layer, and possesses a high T 1 relaxivity (12.52 m m −1 s −1 ), a small hydrodynamic size (6.43 nm), remarkable water solubility, excellent biocompatibility, and impressive renal clearable ability. In a rat model of unilateral ureteral obstruction (UUO), the nanoprobe-based MRI can not only accurately visualize the locations of renal injury, but also provide comprehensive functional data including peak value, peak time, relative renal function (RRF), and clearance percentage via MRI. The findings prove the immense potential of ferrite nanoprobes as a superior alternative to GBCAs for the early diagnosis of kidney damage.
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DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Ning Liu,Shuguang Bi,Ying Ou,Hai Liu,Yi Zhang,Chunli Gong
Proton exchange membranes with high ionic conductivity and good chemical stability are critical for achieving high power density and long lifespan of direct methanol cells (DMFCs). Herein, a zwitterionic molecule was grafted onto the surface of polyvinylidene fluoride (PVDF) nanofibers to obtain functionalized PVDF porous substrate (SBMA-PDA@PVDF). Then, sulfonated poly(ether ether ketone) (SPEEK) was filled into the pores of SBMA-PDA@PVDF, and further ionic cross-linked via H 2 SO 4 to prepare the composite membrane (SBMA-PDA@PVDF/SPEEK). The basic groups on the zwitterionic interface could not only establish ionic cross-linking with SPEEK to increase chemical stability and reduce swelling, but also serve as the adsorption sites for subsequent H 2 SO 4 cross-linking to significantly enhance proton conductivity. Super-high proton conductivity (165.34 mS cm −1 , 80 °C) was achieved for the membrane, which was 2.12 times higher than that of the pure SPEEK. Moreover, the SBMA-PDA@PVDF/SPEEK membrane exhibited remarkably improved oxidative stability of 91.6 % mass retention after soaking in Fenton’s agent for 12 h, while pure SPEEK completely decomposed. Satisfactorily, the DMFC assembled with SBMA-PDA@PVDF/SPEEK exhibited a peak power density of 99.01 mW cm −2 , which was twice as much as that of commercial Nafion 212 (48.88 mW cm −2 ). After 235 h durability test, only 11 % voltage loss was observed.
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PubMed
高影响因子
IONICS
·
2020
·Vol. 26
·期 6
·3147-3159
·
IF 2.394
Wei Xianli,Liu Suqin,Wang Jue,He Zhen,Zhao Kuangmin,Yang Yuliang,Liu Bingjun,Huang Rongjiao,He Zhangxing
The electrolyte, one of the key components for the energy storage in the vanadium redox flow battery (VRFB), hinders the further commercial applications of the VRFB due to the poor thermal stability of the positive electrolyte at the elevated temperature and the inferior activity on the interface of electrode. To enhance the performance of the positive electrolyte, a zwitterion-type molecule pyridinium propyl sulphobetaine (PPS) with negatively charged sulfonic group and positively charged pyridine group is adopted as the additive for the positive electrolyte. In this study, we have proved that PPS can be adsorbed on the electrode through sulfonic group and pyridine group under both positive potential and negative potential, which can effectively modify the interface of electrode. Compared to other additives containing –NH 2 /–SO 3 H groups, PPS containing pyridine group may effectively eliminate the side effects of protonation (–NH 3 + ) and intermolecular hydrogen bonding (-SO 3 − --- + H 3 N-) in acidic electrolyte. Moreover, the PPS-containing V(V) electrolyte presents a better stability at 50 °C compared to the blank V(V) electrolyte. As a consequence, with the addition of 1% PPS in positive electrolyte, the VRFB exhibits higher efficiencies (80.78% VE and 78.17% EE compared to 78.95% VE and 76.87% EE of the blank VRFB at 100 mA cm −2 ) and 76.28% capacity retention after 100 cycles which is 5.22% higher than that of the pristine VRFB. Herein, the study of zwitterion molecules provides a meaningful reference for the further research on organic additives for VRFB.
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高影响因子
MACROMOLECULAR BIOSCIENCE
·
2021
·Vol. 21
·期 12
·2100341
·
IF 4.979
Yuqi Liu,Fanjun Zhang,Shiying Lang,Li Yang,Shuai Gao,Dimeng Wu,Gongyan Liu,Yunbing Wang
Inflammation and thrombosis are two major complications of blood-contacting catheters that are used as extracorporeal circuits for hemodialysis and life-support systems. In clinical applications, complications can lead to increased mortality and morbidity rates. In this work, a biomimetic erythrocyte membrane zwitterion coating based on poly(2-methacryloyloxyethyl phosphorylcholine- co -dopamine methacrylate) (pMPCDA) copolymers is uniformly and robustly modified onto a polyvinyl chloride (PVC) catheter via mussel-inspired surface chemistry. The zwitterionic pMPCDA coating exhibits excellent antifouling activity and resists bacterial adhesion, fibrinogen adsorption, and platelet adhesion/activation. The material also demonstrates great hemocompatibility, cytocompatibility, and anticoagulation properties in vitro. Additionally, this biocompatible pMPCDA coating reduces in vivo foreign-body reactions by mitigating inflammatory response and collagen capsule formation, due to its outstanding ability to resist nonspecific protein adsorption. More importantly, when compared with a bare PVC catheter, the pMPCDA coating exhibits outstanding antithrombotic properties when tested in an ex vivo rabbit perfusion model. Thus, it is envisioned that this biomimetic erythrocyte membrane surface strategy will provide a promising way to mitigate inflammation and thrombosis caused by the use of blood-contacting catheters.
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PubMed
高影响因子
POLYMER
·
2026
·
IF 5.1
Ying-Ying Shan,Xin-Yu Hao,Qiang Zhang,Xing Cao,Peng Chen,Yan-Peng Ni
The inherent flammability of poly (lactic acid) (PLA) severely restricts its range of applications, whereas circular economy principles require full component recovery of waste PLA components. Conventional flame-retardant modifications often induce excessive PLA degradation during melt processing and contaminate monomer streams in chemical recycling, creating a long-standing conflict between fire safety and recyclability. In this work, a phosphorus/nitrogen-containing flame retardant, designated CEDCE, was synthesized. With only 3.0 wt% CEDCE loading, the PLA/CEDCE composite attained a limiting oxygen index of 28.2% and achieved a UL-94 V-0 rating, accompanied by suppressed melt dripping and markedly reduced heat release rate and total heat release, all while preserving favorable mechanical properties and processability. During chemical recycling, the zwitterionic nature of CEDCE not only enables its own efficient recovery through pH adjustment but also becomes activated under methanolysis conditions to catalyze PLA depolymerization, thereby allowing simultaneous recovery of high-purity methyl lactate and reusable flame retardant without any external catalyst. This study provides an innovative strategy to simultaneously improve the functionality, comprehensive performance, and chemical recyclability of PLA-based materials for sustainable circular development.
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高影响因子
ANALYTICA CHIMICA ACTA
·
2024
·
IF 5.7
Meng Xu,Zhenwei Wu
In this study, three small peptoids with different structures, named Sil-peptoids, were developed to improve the separation selectivity of zwitterion-exchange/reversed-phase mixed-mode chromatography stationary phases for multi-component complex drugs. Nonpolar, amphoteric, and alkaline drugs were used as test samples to demonstrate their retention behaviors in reversed-phase, ionic, and mixed-mode interactions. It was observed that different carboxyl anions in the small peptoids of the Sil-peptoids had vast differences in their stereo-selectivity. The stereo-selectivity and the influence of Sil-peptoids on the retention behavior of complex drugs and their interaction mechanism for the drug molecules were effectively evaluated through the combination of chromatographic analysis and molecular modeling. Finally, a mixture of drugs consisting of two polar and six non-polar drugs was used to obtain a separation effect with a resolution >1.5. Two other groups of polar antibiotics were used to verify the separation ability of the Sil-peptoids. The results indicated that the Sil-peptoids could separate multiple substances simultaneously. These novel stationary phases can be applied to the analysis of complex multi-component drugs.
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PubMed
高影响因子
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