SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Yingjun Qiao,Xianyang Dai,Bing Zhao,Zhiqiang Qian,Zhijian Wu,Zhong Liu
It is highly appealing to use titanium-based adsorbents (like H 2 TiO 3 (HTO)) that have a high capacity and selectivity to directly extract Li + from an aqueous solution. However, HTO still faces the problems of low actual adsorption capacity and dissolution of Ti 4+ , and the application of powder adsorbents is limited by poor fluidity and poor recyclability. In this work, a multi-scale modification strategy was adopted. At the atomic-scale, we prepared Ni-doped HTO-Ni-2 % powder which exhibited higher adsorption capacity (33.27 mg/g) and lower dissolution rate of Ti 4+ (2.2 %) compared to undoped HTO (29.73 mg/g and 2.63 %). Computational studies showed that Ni doping replaced Li in the (Li) layer, resulting in more stable Ni O bonds and enhanced electronic transition ability. At the micro-scale, we have achieved successful granulation of HTO-Ni-2 % using ethylene vinyl alcohol (EVOH) as a binder for the first time. Owing to the increased hydrophilicity by EVOH, the spherical adsorbents exhibited impressive performance, achieving adsorption equilibrium in a short time while maintaining a considerable adsorption capacity (24 h, 10.2 mg/g), and having lower Ti 4+ dissolution. These results have significant implications for developing efficient adsorbents for lithium extraction.
研究领域:
材料科学
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环境科学
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JOURNAL OF CHROMATOGRAPHY B-ANALYTICAL TECHNOLOGIES IN THE BIOMEDICAL AND LIFE SCIENCES
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2019
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IF 2.813
Jiawen Li,Dongqiang Lin,Shanjing Yao,N.K.H. Slater,Qilei Zhang
Traditional chromatographic techniques used in downstream processes of biomolecule manufacturing are often time-consuming and expensive. In this study, a cost-effective microporous micro-capillary film (MMCF) composed of ethylenevinyl alcohol (EVOH) was evaluated for its potential application in immunoadsorption with high process efficiency. A peptide ligand Ac-Phe-Tyr-His-Glu (Ac-FYHE) was immobilized on the inner surface of MMCF for selective binding of human immunoglobulin (hIgG). The porous structure and chemical properties of the prepared MMCF were confirmed by scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR). hIgG (2 mg/ml) adsorption studies demonstrated that the binding process followed a Langmuir isotherm with equilibrium adsorption capacities of 9.31 and 3.47 mg/ml adsorbent under static and dynamic conditions, respectively. Moreover, the membrane showed good flowrate tolerance when studied under flowrates of 0.5 ml/min to 10 ml/min. hIgG purity was 88.2% when obtained from an hIgG (2 mg/ml) and HSA (8 mg/ml) mixture and the purity remained over 80.0% when hIgG concentrations increased in the mixtures. Moreover, purity of 82.3% was achieved when removing hIgG directly from human serum. The MMCF-Ac-FYHE affinity column is expected to selectively remove hIgG from blood for the treatment of autoimmune diseases with high efficiency and cost effectiveness.
研究领域:
生物工程
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医学工程
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PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2026
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IF 3.1
Xingyu Liu,Chan Dong,Jingang Zhang,Jingxia Qian,Jean-Marie Basset,Dongping Sun,Lu Zhou
A fluorine-free hydrophilic coating was fabricated on polytetrafluoroethylene (PTFE) membranes using sodium dodecylbenzenesulfonate (SDBS), nano-silica (SiO 2 ), and ethylene-vinyl alcohol copolymer (EVOH) through a simple immersion–drying process. The modification aimed to improve membrane wettability, permeability, and chemical stability. FTIR, XPS, SEM, and AFM analyses confirmed the formation of a uniform organic–inorganic composite coating. AFM further showed that the characteristic granular morphology and surface roughness changed little after immersion in acidic, alkaline, and oxidative solutions, indicating good nanoscale structural stability under harsh conditions. At the optimal composition (SDBS:SiO 2 :EVOH = 2:1:1), the water contact angle decreased from 124.8° for pristine PTFE to 60.6°, while the pure water flux reached 3727.99 L m −2 h −1 . The modified membrane also exhibited high flux recovery after bovine serum albumin fouling, with a flux recovery ratio of 92.3%. In oil–water separation tests, the membrane achieved separation efficiencies above 98% and maintained stable performance during three consecutive filtration cycles. In addition, stable wettability and permeation performance were retained after 1-week immersion in solutions ranging from pH 1–14. The results indicate that the EVOH-stabilized SiO 2 /SDBS coating provides an effective, PFAS-free, and scalable strategy for preparing durable hydrophilic PTFE membranes under harsh operating conditions.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2026
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IF 5.4
Yinuo Zhang,Dong Yang,Yuxi Wang,Dengke Li,Tao Mei,Qihao Guo,Ming Xia,Pan Cheng,Ke Liu,Dong Wang
Vacuum-assisted fabrication of EVOH nanofiber membrane with uniform nanopores for virus removal. • In-situ GA/PEG modification endows superior hydrophilicity and protein antifouling performance. • Optimized PNFM achieves high flux of 857.45 L·m −2 ·h −1 , > 95% protein recovery rate and virus LRV > 5. • The membrane breaks permeability–fouling trade-off for biopharmaceutical virus filtration. Achieving high-throughput virus clearance without compromising protein recovery remains a critical challenge in biopharmaceutical processing. This study is predicated on the hypothesis that the assembly of ultrafine nanofibers, coupled with synergistic in-situ PEG crosslinking, can create a mechanically robust membrane with precisely tailored nanopores and a good hydrophilic surface to overcome the permeability-selectivity trade-off. Herein, ultrafine ethylene vinyl alcohol (EVOH) nanofibers (∼50 nm) were produced via melt extrusion phase separation and fabricated into membranes through vacuum-assisted wet-laying. Subsequent in-situ crosslinking with glutaraldehyde (GA) and polyethylene glycol (PEG) yielded a modified membrane (PNFM-2) featuring a narrow pore size distribution (33.18 nm) and good hydrophilicity (water contact angle: 28.9°). The membrane demonstrated an exceptional steady-state water flux of 857.45 L m −2 h −1 , a 30 nm Au nanoparticle rejection rate above 99%, and a bovine serum albumin (BSA) recovery rate exceeding 95%. Crucially, PNFM-2 achieved a log reduction value (LRV) > 5 for PP7 bacteriophages in intravenous immunoglobulin solutions, fulfilling the stringent international conference on harmonization (ICH) Q5A regulatory requirements. These results validate the proposed hypothesis and offer a simple, scalable strategy for engineering high-performance, antifouling nanofibrous membranes for industrial-scale viral clearance. Download: Download high-res image (243KB) Download: Download full-size image
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HIGH PERFORMANCE POLYMERS
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2020
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IF 1.568
Ze Li,Guifen Gong,Yun Xing,Yanmei Luo,Weiwei Cui
A lithium ethylene-vinyl alcohol copolymer sulfate (EVOH-SO3Li)/polyimide (PI) composite fiber membrane prepared via high-voltage electrospinning and impregnation was used as a lithium-ion battery separator for research purposes. The polyamic acid spinning solution was synthesized from 3,3′′,4,4′′-benzophenone tetracarboxylic dianhydride and 4,4-diaminodiphenyl ether. The PI fiber membrane was prepared via high-voltage electrospinning and thermal imidization, and EVOH-SO3Li was then coated on the surface of the PI fiber to prepare an EVOH-SO3Li/PI composite fiber membrane material (t-EVOH-SO3Li/PI). Overall, the EVOH-SO3Li/PI membrane exhibits excellent basic physical properties, given the clear three-dimensional network microstructure. When compared with EVOH-SO3Li/PI composite fiber membrane prepared via the cospinning method (s-EVOH-SO3Li/PI), its electrolyte uptake and tensile strength can increase to 739% and 17.56 MPa, respectively. Additionally, the EVOH-SO3Li/PI composite fiber membrane prepared via high-voltage electrospinning and impregnation exhibits better heat shrinkage stability, electrochemical performance, and high-temperature self-closing pores function. The electrochemical stability window, electrochemical impedance, and ionic conductivity correspond to 5.8 V, 310 Ω, and 3.753 × 10−3 S cm−1, respectively. Specifically, at 200°C, the internal pores can close effectively, and this is extremely important for the safety of lithium-ion batteries.
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ENERGY & FUELS
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2026
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IF 6
Rui Zhang,Xiaopei Huang,Shiyin Wang,Yufan Li,Lianghong Zhou,Francesco Barzagli,Chao’en Li
Hydrogen permeation is a major challenge in high-pressure gaseous hydrogen storage and transportation. In this study, a series of novel polyethylenimine-modified graphene oxide/polyethylene-vinyl alcohol (PEI-GO-EVOH) composites were prepared and coated on a nylon substrate for hydrogen barrier applications. Hydrophilic PEI was employed to modify graphene oxide, thereby promoting the uniform dispersion of PEI-GO within the EVOH matrix. Various characterization techniques were used to investigate how PEI-GO influences the morphology, thermal stability, mechanical properties, adhesion, hydrophilicity, and hydrogen barrier performance of the composite coatings. GO-EVOH composites were also prepared and characterized for comparison. Compared to pure EVOH and GO-EVOH, PEI-GO-EVOH composites exhibited enhanced thermal and mechanical stability, along with significantly improved hydrogen barrier properties. Hydrogen bonding between the components was proven to play a dominant role in these property improvements. At a PEI-GO content of 2 wt %, the hydrogen permeability of PEI-GO-EVOH coatings decreased by 48.4% and 42.9% compared to the bare nylon substrate and the GO-EVOH coating, respectively. When benchmarked against reported hydrogen barrier systems, the PEI-GO-EVOH coating achieves competitive performance with lower filler loading, confirming its potential as a suitable hydrogen barrier coating for nonmetallic pipelines and hydrogen storage containers.
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高影响因子
Journal of Environmental Chemical Engineering
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2024
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IF 7.4
Yifei Gong,Haiyang Shen,Hua Zhao,Yueyue Zhang,Ping Li,Congliang Cheng
Quaternized polyepichlorohydrin (PyPECH) was successfully synthesized by the quaternization reaction between Pyridine and PECH. The correctness of the experimental result was demonstrated through Fourier transform infrared spectroscopy (FTIR) and 1 H NMR spectroscopy. With the combination of PyPECH, Polyvinyl alcohol (PVA), Ethylene-vinyl alcohol copolymer (EVOH), and Tetraethyl orthosilicate (TEOS), five different anion exchange membranes (AEMs) for diffusion dialysis (DD) were successfully prepared. The structure of prepared membranes was characterized and analyzed in detail, which included FTIR, X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and transmission electron microscope (TEM). At the same time, the comprehensive performances which included wate uptake (W R ), linear expansion rate (LER), ion exchange capacities (IEC), thermal stability, chemical stability, and mechanical stability were also discussed at great length. In DD experiments, the prepared membranes demonstrated excellent acid recovery ability, with the acid dialysis coefficients (U H + ) of 11×10 −3 to 35.5×10 −3 m/h. Furthermore, according to the test results, the prepared membranes exhibited a higher S value (35−50) than that of commercial membranes DF-120 (18.5). Therefore, the prepared membranes had competitive advantage in acid recovery via diffusion dialysis.
研究领域:
材料科学
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化学工程
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环境工程
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2026
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IF 9.2
Hanzi Xu,Xiaofei Jia,Yaqi Yue,Xiangju Song,Wenqi Liu,Xiaojin Li,Heqing Jiang
Green hydrogen is the largest contributing factor to the growth of the hydrogen energy industry, with alkaline water electrolysis (AWE) being a leading manufacturing process for its large-scale fabrication. However, commercial membranes exhibit insufficient hydrophilicity and poor gas barrier properties, limiting AWE efficiency and safety. This work develops a high-performance composite membrane with low area resistance, excellent gas barrier and high mechanical strength. By incorporating hydrophilic EVOH into PSU and applying pre-evaporation in phase inversion, a hydrogen-bonded network is constructed and pore structure is regulated. The optimized PEZ-10 membrane shows porosity of 61.23%, water contact angle of 48.33°, area resistance of 0.153 Ω cm 2 , bubble point pressure of 5.38 bar and tensile strength of 44 MPa. It achieves 1714 mA cm −2 at 2 V and operates stably for over 100 h at 500 mA cm −2 , providing a feasible strategy for high-performance AWE membranes in large-scale green hydrogen production.
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高影响因子
JOURNAL OF THE TEXTILE INSTITUTE
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2024
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IF 1.5
Shuyu Chen,Yongfang Qian,Ying Wang,Lihua Lyu,Xinghai Zhou
Aiming to improve the low stability of blueberry anthocyanins (BA) and moisture absorption of the ethylene vinyl alcohol copolymer (EVOH), BA was encapsulated in EVOH and then dispersed in PVA solution to form water in water (W/W) emulsion, and further electrospun into nanofibers. The stability of the emulsion was analyzed by bio microscopy and zeta potential particle size analyzer. The successful encapsulation of BA/EVOH in the continuous phase of PVA was verified by infrared spectroscopy. The incorporation of BA significantly improved the oxidation resistance and UV resistance of the membranes, which could completely block UVB region and most of the UVA region. In addition, water vapor transmission rate and mechanical properties were effectively enhanced after thermal crosslinking. Finally, the potential application of the membrane in shrimp spoilage monitoring was explored, where the color of the indicator changed from mauve to grayish blue during indoor sealed storage. The results suggest that the membrane can monitor shrimp spoilage in real time through pH changes and the developed index membrane would be a good candidate as intelligent food package material.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2021
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IF 13.273
Li Chen,Huan Dong,Weiguo Pan,Jiangdong Dai,Xaohui Dai,Jianming Pan
Efficient separation of adjacent rare earths is an interesting and challenging job for membrane separation scientists. In this article, a novel polymer inclusion membrane (PIM) incorporating the hydrophilic additive random copolymer poly (vinyl alcohol- co -ethylene) (EVOH) was synthesized. Due to the polarity of P = O and P-OH groups in Cyanex272 and hydrophilicity of –OH groups in EVOH, the membranes exhibited much smaller water contact angles than pure PVDF membranes. And FT-IR results indicated that the addition of EVOH made no difference on the coordination between P = O, P-OH in Cyanex272 and Lu 3+ . SEM and AFM results indicated that the addition of appropriate amount of EVOH could generate more and larger surface pores and internal channels. Optimum membrane compositions and permeation conditions were fixed via static adsorption and dynamics permeation experiments. Separation factor was calculated as high as 3.78, which was much higher than previous studies no matter in solvent extraction or membrane separation. It is worth noting that it’s the first time an obvious carrier’s leakage was observed via characterizations which implied Cyanex272 may be not a perfect carrier in terms of PIM’s stability. All these results proved that this novel PIM with EVOH serving as hydrophilic additive could be further testified in heavy rare earths separation and purification process.
研究领域:
化学工程
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材料科学
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DOI
高影响因子
COMPOSITES COMMUNICATIONS
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2021
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IF 6.617
Zongmin Ma,Zishuo Yan,Xia Yin,Yang Si,Jianyong Yu,Bin Ding
Nano-structured membranes with great properties are promising alternatives for water purification. However, it remains a challenge to develop such materials, especially for purifying water contaminated by pathogenic microbes. In this work, a newly-designed nanofibrous membrane with rechargeable biocidal function was prepared through grafting poly(vinyl alcohol- co -ethylene) (EVOH) with poly[5,5-dimethyl-3-(3′-triethoxysilylpropyl)-hydratoin] (PSPH) in the form of electrospun nanofibers . The proposed strategy intrinsically allows the N -halamine compounds to homogeneously and covalently integrate with EVOH nanofibers, bringing the membranes efficiently antimicrobial capability and durability. Moreover, the resultant chlorinated membranes exhibit characteristics of good mechanical property, superior hydrophilicity, renewable chlorination activity (>4000 ppm) and outstanding microbicidal performance (>99.999%), suggesting the composite materials could be used as filtration layers for bacteria-contaminated water disinfection with a favorable flux (>2000 L m −2 h −1 ). The successful fabrication strategy provides innovative insights into exploring other antifouling nanofibrous materials in a renewable way.
研究领域:
材料科学
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环境工程
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水处理
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纳米技术
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DOI
高影响因子
FOOD CHEMISTRY
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2026
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IF 10.4
Li Xia,Zurong Shi,Guangxin Ren,Wenya Wei,Mingjuan Zhang,Yue Wang,Yun Wang
Ethylene vinyl alcohol-bayberry anthocyanins-carvacrol (EVOH-BAs-CA) membrane is developed for fruit freshness monitoring and maintaining. • BAs endow the membrane antioxidant activity. • Antibacterial activity of the membrane is from the control released CA. • EVOH-BAs-CA membrane has a reversible transparency response to ethanol exudate. In this study, a visual freshness indicator based on electrospun fibers membrane was fabricated, which relies on ethanol-responsive light transmittance to evaluate fruit freshness. Carvacrol (CA) and bayberry anthocyanins (BAs) were incorporated into ethylene-vinyl alcohol (EVOH) matrix to prepare the composite membrane for bayberry freshness monitoring and preservation. The EVOH-BAs-CA membrane was initially opaque and turned transparent, as ethanol (EtOH) exudates released from spoiled bayberry induced a rapid increase in light transmittance during storage. The membrane showed high sensitivity to ethanol exudates, retaining a transmittance above 60% after 10 reuse cycles. Additionally, the EVOH-BAs-CA membrane exhibits strong antibacterial and antioxidant properties and can approximately prolong the freshness of bayberry for 4 days, which resulted from the effective release of CA and BAs. The implementation of the EVOH-BAs-CA membrane in visual freshness monitoring for bayberry highlights its significant potential within intelligent packaging systems. Download: Download high-res image (127KB) Download: Download full-size image
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PubMed
高影响因子
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