SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Junhao Zhou,Yixin Li,Qiang Wu,Ziqiang Liu,Mengmeng Zhang,Haonan Hu,Xuan Wang,Xiaolong Lu,Chunrui Wu
Membrane distillation (MD) is an advanced separation technology that combines principles of traditional distillation with membrane technology, offering significant potential for applications in desalination, high-salinity water treatment, and industrial wastewater management. Nevertheless, MD membranes encounter challenges such as low permeate flux and membrane pore wetting, which notably hinder their development and wider application. To address these issues, this study developed MD membranes with superhydrophobic network interlayer through a one-step impregnation method. The superhydrophobic network layer was fabricated using the hydrophobic polymer PDMS and ZnO nanoparticles (ZnNPs). Following the modification, the structural properties and MD performance were remarkably improved. Specifically, the water contact angle (WCA) of the membrane increased from 125.5° to 155.9°, accompanied by a sliding angle (SA) of 11.3°, while the liquid entry pressure (LEP) was enhanced from 0.85 bar to 1.55 bar, and the average pore size decreased from 0.88 μm to 0.61 μm—attributable to the constructed superhydrophobic network layer. Furthermore, the results of direct contact membrane distillation (DCMD) tests showed that the superhydrophobic membranes exhibited superior anti-wetting properties and more outstanding permeation fluxes compared to commercial PVDF membranes. Using a 3.5 wt% NaCl solution as feed solution, the superhydrophobic membrane exhibited a water flux of 35.47 ± 0.96 kg·m −2 ·h −1 in an 18 h DCMD test. In the 72-h-long DCMD test, the superhydrophobic membrane exhibited a stabilized water flux of 35.01 ± 1.83 kg·m −2 ·h −1 and a retention rate of 99.95 %, which proved its applicability in MD desalination.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Yifan Zheng,Yarong Liu,Hao Li,Zhirong Yang,Wenjia Wu,Jie Zhang,Jie Wu,Jingtao Wang
Precisely constructing the well-defined proton transport platform and studying its transport behavior are of great importance yet remain challenging. Here, a Zr-BTB-X nanosheet via post-synthetic modifying Zr-BTB with terephthalic acid (BDC) and trimesic acid (BTC) is developed, which coordinate to the unsaturated Zr₆ clusters. The increased –COOH groups endow Zr-BTB-BTC nanosheets significant improvement in proton conductivity, achieving 490.9 mS cm −1 at 80 °C and 100% RH, compared to 2.19 mS cm −1 for the original Zr-BTB nanosheets. Density functional theory calculations and water adsorption studies reveal that the formation of enriched water networks induced by the –COOH groups facilitates efficient proton dissociation and reduces the proton transport barrier. The assembled Zr-BTB-BTC lamellar membrane, retaining high conductivity properties of nanosheet, reaches 242.4 mS cm −1 at 80 °C and 100% RH. It also delivers a superior performance in proton exchange membrane fuel cell (PEMFC), achieving ultrahigh peak power (0.91 W cm −2 ), maximum current density (3.59 A cm −2 ), and good durability (100 h of OCV test).
研究领域:
材料科学
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能源科学
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理论计算
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DOI
高影响因子
WATER RESEARCH
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2024
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IF 11.4
Jie Liu,Kexin Zhang,Xin Liu,Qiyong Xu,Weiyi Li
Despite being recognized as a promising technique for treating high salinity water, membrane distillation (MD) has been plagued by the scaling of sparingly soluble salts. The growth of crystals can not only create additional resistance to evaporating water at the feed-membrane interface, but also alter the hydrophobic network to bridge the feed and distillate (i.e., result in the phenomenon of wetting). When recognizing the uncertain behaviors of calcium sulfate (CaSO 4 ) scaling in MD, this study was motivated to ascertain whether the crystal-membrane interactions could be dependent on the variation in crystalline morphology. In particular, optical coherence tomography (OCT) was employed to characterize the scaling-induced wetting via a direct-observation-through-the-membrane (DOTM) mode, which mitigated the effects of developing an external scaling layer on resolving the crystal-membrane interactions. The improved in-situ characterization suggests that the crystalline morphology of CaSO 4 could be effectively regulated by varying the stoichiometry of crystallizing ions; the richness of calcium in the aqueous environment for crystallization would be in favor of weakening the crystal-membrane interactions. The stoichiometry-dependent growth of CaSO 4 crystals can be exploited to develop an effective strategy for preventing the hydrophobic network from being wetted or irreversibly damaged.
研究领域:
环境科学
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膜科学与技术
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化学工程
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水处理技术
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材料表征
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结晶过程
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DOI
高影响因子
POLYMER
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2017
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IF 3.684
Zhongying Wu,Yiyao Tang,Dewen Sun,Shujiang Zhang,Yixuan Xu,Hua Wei,Chenliang Gong
Organic-inorganic hybrid polymers based on poly(arylene ether sulfone) (PAES) containing multi-sulfonated polyhedral oligosilsesquioxane (POSS) pendants (PAES-sPOSS-x) were synthesized to improve the inorganic fillers' distribution in polymer matrix and to enhance the ion conductivity and swelling resistance of aromatic polymer electrolyte membrane. The synthesis of the graft hybrid polymers in this study involves the grafting of mono-functional 3-Iodopropylheptaphenyl POSS with an -OH functionalized polymer main-chain and postsulfonation of the POSS grafted PAES. Notably, nearly all of the benzene rings on the POSS side chains were sulfonated successfully without any sulfonation of main chains. The structure with hydrophobic aromatic backbone and hydrophilic hybrid side chains made an improvement of the nano-phase hydrophilic/hydrophobic separation, thereby facilitating the formation of continuous proton exchange channels. The transmission electron microscopy (TEM) images of the comb-shaped polymer membranes showed homogeneous sulfonated POSS (sPOSS) dispersion, significant phase separation and well-defined interconnected hydrophilic networks. This morphological structure leaded to dramatically enhanced comprehensive properties as proton conductive membranes.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
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2023
·Vol. 33
·期 27
·2215109
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IF 19
Yanran Zhu,Qian Chen,Yue Zhou,Xingya Li,Liang Ge,Tongwen Xu
Acid recycling via cation exchange membranes (CEMs) has attracted considerable attention from traditional industries and advanced manufacturing because of the economic and environmental advantages. However, current polymeric CEMs merely have constant ion channels by the fixed groups in the matrix and lack the synergy of bi-functional sites. Herein, a series of dibenzo-18-crown-6 (DB18C6) functionalized sulfonated poly(biphenyl alkylene) membranes is reported. The resultant membranes form phase separation and ordered ion channels by the electrostatic interaction between DB18C6-H + complexes and the SO 3 − anionic sites, constructing a low-swelling synergistic hydrophilic network. The prepared membranes have high proton permeation rates of 2.98-4.85 mol m −2 h -1 and extremely low ferrous ion permeabilities, leading to a high H + /Fe 2+ selectivity of ≈3153 at the current density of 10 mA cm -2 , which is one order of magnitude higher than the commercial and previously reported membranes via the electrodialysis. These results provide strategies for designing bi-functional ion exchange membranes for selective ion transport via utilizing crown ether/cation complexes.
研究领域:
材料科学
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化学工程
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF CHROMATOGRAPHY A
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2021
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IF 4.759
Kaina Zhang,Yun Hao,Dehua Hu,Suimin Deng,Yuhao Jin,Xiangfeng Wang,Hailing Liu,Yuan Liu,Mengxia Xie
A hydrophilic metal-organic network based on Ti 4+ and dual natural ligand, tannic acid (TA) and phytic acid (PA), has been developed to enrich phosphopeptides from complex bio-samples prior to liquid chromatography-mass spectrometric analysis. Due to the strong chelation ability of TA and PA, abundant Ti 4+ can be immobilized in the material, forming hydrophilic network by one-step coordination-driven self-assembly approach. The sorbent, [email protected] 3 O 4 , exhibited satisfactory selectivity for the phosphopeptides in the tryptic digest of β-casein, and can eliminate the interference components in 1000-fold excess of bovine serum albumin. The adsorption capacity of the sorbents for phosphopeptides was up to 35.2 mg g −1 and the adsorbing equilibrium can be reached in 5 min. The adsorbing mechanism has been investigated and the results indicated that the Ti 4+ in forms of [Ti(f-TA)(H 2 O) 4 ] 2+ , [Ti(f-PA)(H 2 O) 4 ] 2+ and Ti(f-PA) 2 (H 2 O) 2 may play an important role in the adsorption process. The sorbent of the [email protected] 3 O 4 has been applied to enrichment of the phosphopeptides in tryptic digest of rat liver lysate, and 3408 phosphopeptides have been identified, while the numbers of the identified phosphopeptides were 2730 and 1217 when the sample was enriched by the commercial TiO 2 and Fe 3+ -IMAC kit, respectively. This work provides a strategy to enrich phosphopeptides from complex samples and shows great potential application in phosphoproteome research.
研究领域:
分析化学
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生物化学
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蛋白质组学
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产品关联
DOI
PubMed
高影响因子
ACS Nano
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2024
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IF 15.8
Wenhao Shi,Xitang Qian,Chuankai Zou,Meng Zhang,Chenhui Huang,Xiangshui Miao,Lei Ye
Ion transport is a critical phenomenon underpinning numerous biological, physical, and chemical systems. Proton transistors leveraging proton transport face significant limitations, such as a low on–off ratio and deficient carrier mobility, which restrict their applicability in biological and other scenarios. This study explores the use of two-dimensional (2D) vacancy-residing transition metal phosphorus trichallcogenide-based membranes as the active layer for proton field-effect transistors. The synthesized Cd0.85PS3Li0.15H0.15 membrane exhibits a well-organized layered structure and high hydrophilicity, with nanometer-sized interlayers containing interconnected water networks. These distinct features facilitate proton conduction, leading to a high proton conductivity value of 0.83 S cm–1 at 98% relative humidity and 90 °C, with an activation energy of 0.26 eV. The Cd0.85PS3Li0.15H0.15-based proton transistor demonstrates tunability via gate voltage, thereby enabling effective modulation of proton flow across source and drain electrodes. The transistor notably showcases superior switching characteristics, with an on/off ratio surpassing 5.51 and a carrier mobility of 8.84 × 10–2 cm2 V–1 s–1. The underlying mechanism for this performance enhancement is attributed to electric-field-induced switching in Cd vacancies. This research boosts the development of highly versatile ionotropic devices by introducing advanced 2D ion-conductive membranes.
研究领域:
材料科学
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电子学
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纳米技术
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质子学
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器件物理
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产品关联
DOI
PubMed
高影响因子
ACS Nano
·
2023
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IF 17.1
Yue Hou,Yazhen Li,Yingqi Li,Da Li,Tailin Guo,Xu Deng,Hongping Zhang,Chaoming Xie,Xiong Lu
Hydrogels with robust wet adhesion are desirable for applications in aqueous environments. Wet adhesion arising from synergy between hydrophobic and catechol components in mussel foot proteins has been highlighted. However, optimizing hydrogels with multiple components is challenging because of their complex structure–property relationships. Herein, high-throughput screening of a series of hydrophobic alkyl monomers and adhesive catechol derivatives was used to systematically develop wet adhesive hydrogels. Short alkyl chains promote wet adhesion by repelling water at the adhesive interface, whereas long alkyl chains form strong hydrophobic interactions inside the hydrogel network that impede or dissipate energy for wet adhesion. The optimized wet adhesive hydrogel, containing short alkyl chain, was applied for rapid hemostasis and wound healing because of the synergistic effect of catechol and alkyl groups and its immunomodulation ability, which is revealed through a transcriptomic analysis. Conductive nanocomponents were incorporated into the optimized hydrogel to produce a wearable device, which was used for continuous monitoring human electrocardiogram (ECG) during swimming, and in situ epicardial ECG on a porcine living and beating heart. This study demonstrated an efficient and generalized molecular design strategy for multifunctional wet adhesive hydrogels.
研究领域:
材料科学
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生物医学工程
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生物材料
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组织工程
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生物技术
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产品关联
DOI
PubMed
高影响因子
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