MACROMOLECULAR MATERIALS AND ENGINEERING
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2021
·Vol. 306
·期 6
·2100026
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IF 4.367
Wenna Liu,Cuicui Su,Peipei Su,Huidong Yang,Peng Lu,Zhentao Du,Yumin Ye
Fouling is a major concern in membrane technology. Neutral hydrophilic coatings alleviate fouling on membrane surfaces by passively resisting the adsorption of foulants without altering the properties of membranes. Coatings, however, often result in a trade-off of reduced water flux. Ultrathin hydrophilic coatings could minimize the influence on water flux, but its fabrication is challenging via traditional methods. Here, fabrication of sub-20 nm bilayer hydrophilic coating is reported that is grafted onto nanofiltration (NF) membranes via a one-step initiated chemical vapor deposition (iCVD) method. The iCVD coating is conducted by conformally depositing a crosslinked poly(vinyl pyrrolidone- co -ethylene glycol dimethacrylate) bottom layer on pretreated NF membrane, followed by in situ grafting of poly(vinyl pyrrolidone) homopolymer to further improve surface hydrophilicity. Both thickness and crosslinking degree of the bottom coating are systematically tailored to reduce its side effects on permeation rate and salt rejection. The modified NF membranes exhibit 99% lower microbial adhesion compared to the pristine membrane, with minor impact on permeation and salt rejection performance. The coating is also stable against continuous ultrasonication. The reported method is thus expected to shed light on facile novel ways of reducing membrane fouling in desalination and industrial wastewater treatment.
研究领域:
材料科学
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环境工程
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2025
·
IF 9
Weiwei Huang,Lin Wang,Wenzong Zhou,Weiwei Lv,Quan Yuan,Hang Yang,Xinwei Kang,Daoji Wu,Xuewu Zhu
Commercial nanofiltration (NF) membranes face significant challenges including low permeate flux, membrane fouling, and difficulty in precisely tuning separation selectivity. This study presents an innovative isopropanol (IPA) thermal treatment strategy for optimizing commercial NF270 membrane performance. Through systematic characterization, we demonstrate that IPA molecules penetrate polyamide molecular chain interstices, weakening intermolecular interactions through solvation effects to achieve controllable crosslinking reduction from 60.4 % to 20.3 %. The de-crosslinking processes significantly improved surface hydrophilicity and enhanced surface negativity. The optimized NF-IPA/60 membrane exhibited high permeance (26.7 LMH/bar) and excellent Na 2 SO 4 rejection (>95.7 %) while achieving enhanced selectivity for monovalent species. When treating natural surface water, NF-IPA/60 demonstrated superior contaminant removal and mineral retention capabilities, achieving >80.2 % organic contaminant removal while allowing moderate passage of beneficial minerals (Ca 2+ , Mg 2+ ). Additionally, the membrane exhibited exceptional antifouling performance with flux recovery ratios exceeding 91.7 % throughout three fouling cycles, attributed to synergistic effects of enhanced surface charge, improved hydrophilicity, and reduced surface roughness. This approach provides a facile, environmentally friendly pathway for developing high-performance NF membranes with tailored separation characteristics for advanced water treatment applications.
研究领域:
膜技术
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水处理
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高分子科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2018
·
IF 5.091
Qianyu Liu,Shaobin Huang,Yongqing Zhang,Shuaifei Zhao
We use activated carbon (AC) and titanium oxide (TiO 2 ) nanomaterials as the additives to prepare four polyvinylidene fluoride (PVDF) based ultrafiltration membranes by nonsolvent induced phase separation. The surface properties (pore size, porosity, hydrophilicity and roughness) of the membranes are characterized by scanning electron microscopy, water contact angle measurement, and atomic force microscopy . The chemical properties of the membranes are evaluated by Fourier transform infrared spectroscopy with attenuated total reflection and X-ray diffraction. All these additives can improve the surface hydrophilicity and water permeation flux of the membrane. However, the addition of TiO 2 nanoparticles (20–30 nm) results in larger surface porosities and pore sizes, which causes more severe membrane fouling compared with the neat PVDF membrane. The PVDF-AC membrane exhibits excellent fouling resistance . Particularly, the irreversible fouling after blending AC into PVDF reduces dramatically from 40% to 25%. The antifouling performance of the PVDF-AC membrane may result from the improved hydrophilicity and the favorable surface and structure properties of the membrane. To the best of our knowledge, this is the first demonstration of the antifouling function of AC in membrane preparation. This study suggests that AC could be a new type of nanomaterial for developing antifouling membranes.
研究领域:
材料科学
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膜技术
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环境工程
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纳米技术
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化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Shuya Yuan,Guowei Liu,Qingsheng Zhang,Taifeng Liu,Jianjun Yang,Zhongjie Guan
Element doping has been demonstrated as a useful strategy to regulate the band gap and electronic structure of photocatalyst for improving photocatalytic activity. Herein, ZnIn 2 S 4 (ZIS) nanosheets were doped with alkali metal ions (Li + , Na + or K + ) by a simple solution method. Experimental characterizations reveal that alkali metal ions doping reduce the band gap, raise the conduction band position, and improve surface hydrophilicity of ZIS. In addition, theoretical calculations show that Na doping increases the electron density at valence band maximum and surrounding S atom, which is conducive to produce more electrons and effective utilization of electrons, respectively. Benefited from above factors, Na-doped ZIS (Na-ZIS) shows the highest photocatalytic hydrogen evolution performance. Furthermore, CoSe 2 cocatalyst is loaded on the surface of Na-ZIS (CS/Na-ZIS), which further improve the charge separation and prolong the lifetime of charges. As a result, the optimized CS/Na-ZIS shows a H 2 evolution rate of 4525 μmol·g −1 ·h −1 with an apparent quantum efficiency of 27.5 % at 420 nm, which are much higher than that of pure ZIS. This study provides an in-depth understanding of the synergistic effect of Na doping and CoSe 2 cocatalyst in ameliorating photocatalytic activity.
研究领域:
材料科学
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催化
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能源材料
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光化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DESALINATION
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2022
·
IF 11.211
Yaxu Guan,Shao-Lu Li,Zhenxing Fu,Yiwen Qin,Juntao Wang,Genghao Gong,Yunxia Hu
In this work, we synthesized a zwitterionic polymer PEI-CA for the first time and then grafted it onto the surface of polyamide RO membrane via layer-by-layer interfacial polymerization (LbL-IP). XPS and ATR-FTIR techniques were used to verify the successful modification with PEI-CA. The zwitterionic hyperbranched polymer PEI-CA endowed the modified membrane with much improved surface hydrophilicity and decreased surface negative charge. The tailored M-PEICA exhibited a high water permeance up to 3.92 L m −2 h −1 bar −1 (increased by 62 %) while holding a good NaCl rejection (98.93 %). The dynamic fouling experiments proved that grafting of PEI-CA can help to effectively elevate its antifouling performance against most organic foulants except small molecular negatively charged surfactant SDS. Therefore, we further employed the mixed reagents modification strategy with arginine and PEI-CA, the resulting RO membrane M-mixed presented obviously improved antifouling performance towards SDS, the overall antifouling performances are even better than the well-known RO membrane CR100 of DOW FILMTEC™, that well illustrated multiple reagents modification strategy could be an efficient way that can meet all critical standards. Overall, the novel polymer PEI-CA and as-fabricated RO membranes with outstanding antifouling performances in this study have vast application potential in field of water treatment .
研究领域:
水处理
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膜科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION
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2018
·
IF 1.911
Cheng Zhao,Xiuwen Wu,Guopu Chen,Feng Wang,Jianan Ren
Accelerating wound healing with modified biomaterial has been an attracting field in both material science and medicine. Enhanced cell adhesion could be acquired by improving surface hydrophilicity, which contributes to accelerating wound healing. Chemical reaction has been used for surface modification, but this study used a simple and nontoxic method to improve the hydrophilicity. Polycaprolactone (PCL) scaffold has been regarded as promising material for wound healing while its surface is hydrophobic. Our study demonstrated enhanced hydrophilicity of PCL with AuNPs coating. AuNPs has good biocompatibility and excellent photothermal effect. The coating of AuNPs not only improved the cell adhesion, but also gave PCL the ability to inhibit the growth of bacteria. Animal study showed that the nanocomposites decreased lymphocytes and neutrophils, increased neovascularization and accelerated the abdominal wound healing, which was attributed to improved hydrophilicity and the antibacterial ability. In conclusion, we demonstrated that the nanocomposite could be used as a potential scaffold for cell adhesion and wound healing, and the role of AuNPs was highlighted as a kind of outstanding supplement.
研究领域:
生物材料学
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纳米医学
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组织工程
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创伤修复
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生物相容性
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光热治疗
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表面改性
✓ 已验证
DOI
PubMed
高影响因子
RESEARCH IN MICROBIOLOGY
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2025
·
IF 3.4
Ping Lu,Juan Xue,Aiying Shi,Xuemeng Ji
Purpose Cronobacter sakazakii is a foodborne pathogen notable for both virulence and desiccation tolerance. This study investigates the functional roles of the pESA3 plasmid in mediating these two traits and explores the potential trade-off between them. Methods Proteomic profiling identified pESA3 -encoded proteins, followed by construction of targeted deletion mutants ( hcp , ESA_pESA3p05542 ) and a plasmid-cured strain. Phenotypic assays evaluated growth, desiccation survival, surface hydrophilicity, and virulence in a neonatal rat model. Results Deletion of ESA_pESA3p05542 impaired desiccation tolerance and reduced surface hydrophilicity, while hcp deletion attenuated virulence but enhanced desiccation survival. Notably, complete loss of pESA3 abolished virulence without affecting desiccation resistance, suggesting functional antagonism between plasmid-encoded virulence and stress-response genes. Conclusions pESA3 enables C. sakazakii to balance host pathogenicity and environmental persistence. Its gene modules promote either virulence or desiccation resistance, but not both, reflecting an evolutionary trade-off that supports survival across diverse niches.
研究领域:
微生物学
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分子生物学
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感染性疾病
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食品微生物安全
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细菌遗传学
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宿主-病原体相互作用
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环境应激反应
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2020
·
IF 7.632
Guoan Lin,Xiaoxiang Xu
LaTiO2N has been considered as one of the most promising photocatalysts for solar energy conversion. Nevertheless, it generally has a poor photocatalytic activity under normal conditions, probably linked to severe structural distortions and various types of defects within this compound. Herein, we modified LaTiO2N by introducing Ba into its A site, that is, La0.8Ba0.2TiO2.2N0.8. The presence of Ba at the A site of LaTiO2N not only relaxes the structural distortions but also effectively inhibits defect formation (e.g. Ti3+ species) in LaTiO2N. Moreover, surface hydrophilicity of LaTiO2N is also improved by Ba modification. Photoelectrochemical analysis suggests that charge separation and transferring situation are ameliorated in Ba-modified LaTiO2N, and the valence band edge position is positively shifted. These factors are likely the reasons for the improved photocatalytic activity of La0.8Ba0.2TiO2.2N0.8 in water oxidation reactions.
研究领域:
材料科学
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光化学
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太阳能转换
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Nanomedicine
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2016
·
IF 4.32
Yunzhu Qian,Hanbang Chen,Yang Xu,Jianxin Yang,Xuefeng Zhou,Feimin Zhang,Ning Gu
Constructing biomimetic structure and incorporating bioactive molecules is an effective strategy to achieve a more favorable cell response. To explore the effect of electrospinning (ES) nanofibrous architecture and collagen I (COL I)-incorporated modification on tuning osteoblast response, a resorbable membrane composed of poly(lactic-co-glycolic acid)/poly(caprolactone) (PLGA/PCL; 7:3 w/w) was developed via ES. COL I was blended into PLGA/PCL solution to prepare composite ES membrane. Notably, relatively better cell response was delivered by the bioactive ES-based membrane which was fabricated by modification of 3,4-dihydroxyphenylalanine and COL I. After investigation by field emission scanning electron microscopy, Fourier transform infrared spectroscopy, contact angle measurement, and mechanical test, polyporous three-dimensional nanofibrous structure with low tensile force and the successful integration of COL I was obtained by the ES method. Compared with traditional PLGA/PCL membrane, the surface hydrophilicity of collagen-incorporated membranes was largely enhanced. The behavior of mouse preosteoblast MC3T3-E1 cell infiltration and proliferation on membranes was studied at 24 and 48 hours. The negative control was fabricated by solvent casting. Evaluation of cell adhesion and morphology demonstrated that all the ES membranes were more favorable for promoting the cell adhesion and spreading than the casting membrane. Cell Counting Kit-8 assays revealed that biomimetic architecture, surface topography, and bioactive properties of membranes were favorable for cell growth. Analysis of β1 integrin expression level by immunofluorescence indicated that such biomimetic architecture, especially COL I-grafted surface, plays a key role in cell adhesion and proliferation. The real-time polymerase chain reaction suggested that both surface topography and bioactive properties could facilitate the cell adhesion. The combined effect of biomimetic architecture with enhanced surface activity by 3,4-dihydroxyphenylalanine-assisted modification and COL I incorporation of PLGA/PCL electrospun membranes could successfully fill osteogenic defects and allow for better cell proliferation and differentiation.
研究领域:
生物材料
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组织工程
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细胞生物学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Xuewu Zhu,Wenxin Yan,Hong Peng,Zhe Yang,Zhiwei Zhou,Daoji Wu,Liping Qiu,Daliang Xu,Ning Wang,Feiyong Chen
Regulating the nanofiltration (NF) membrane structure for the simultaneous improvement in permeance and selectivity has attracted extensive attention. In this study, ultraviolet (UV) irradiation was integrated in situ into a typical interfacial polymerization (IP) process to modulate the IP reaction precisely and thus modify the microscopic architecture of NF membranes. UV irradiation was capable of activating trimesoyl chloride (TMC) and inducing photothermal effects. The optimized NF membranes presented thinner and rougher surfaces, as well as an increased negative charge and hydrophilicity. Compared with the control NF membrane (NFM-Con), the optimized NFM-UV40 achieved excellent performance, with 35.5 % greater water permeance and 186.6 % greater Cl − /SO 4 2− separation selectivity. Notably, the UV-assisted NF membranes had better anti-fouling properties than those of commercial NF270. This study proposes a novel strategy for the precise in situ regulation of NF membrane structure and performance, enabling the development of high-performance separation membranes for NF-based water desalination.
研究领域:
材料科学
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膜技术
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水处理
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
FOOD RESEARCH INTERNATIONAL
·
2022
·
IF 7.425
Xiaojia Yan,Yiyang He,Xiangqi Bai,David Julian McClements,Shuai Chen,Xuebo Liu,Fuguo Liu
Zein nanoparticles are commonly used as colloidal emulsifiers to form and stabilize Pickering emulsions. However, the strong surface hydrophobicity of zein nanoparticles limits their widespread application. In this study, composite colloidal emulsifiers were fabricated from zein, sodium caseinate (NaCas), and epigallocatechin gallate (EGCG). Initially, NaCas-EGCG conjugates were formed using either an alkaline or enzymatic method. The enzymatic method led to conjugates containing more EGCG and with a higher thermal stability and surface hydrophilicity. Colloidal emulsifiers were prepared using an antisolvent precipitation method that involved titrating an ethanolic zein solution into an aqueous NaCas-EGCG conjugate solution. The potential application of these emulsifiers for forming and stabilizing high internal phase emulsions (HIPEs) was then explored. The emulsification properties of the zein nanoparticles were improved after they were complexed with NaCas-EGCG conjugates. Pickering HIPEs containing closely packed polygon oil droplets were formed from the colloidal emulsifiers, even at low particle concentrations (0.3% w/v). Overall, our results show that the functional performance of zein nanoparticles can be improved by complexing them with NaCas-EGCG conjugates. The novel colloidal emulsifiers developed in this study may therefore have useful applications in the food and other industries.
研究领域:
食品科学
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胶体科学
·
化学工程
✓ 已验证
DOI
PubMed
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2015
·
IF 1.098
Yong Zhou,Zhelan Dai,Ding Zhai,Congjie Gao
Polypiperazine-amide membranes were modified with poly(ethyleneimine) (PEI) by self-assembled method, through which PEI molecules were fixed on the membrane surface by ionic interaction. In the experiments, the PEI concentration ranged from 50 to 2000 mg·L − 1 while the depositing time was fixed at 20 min. The results showed that low PEI concentration resulted in a slight increase of pure water flux, which was attributed to the enhanced membrane surface hydrophilicity. The PEI adsorption on membrane surface had less effect on the rejections to neutral PEG and sucrose, but improved the rejections to divalent cationic ions and methylene blue as the result of reversion of the membrane surface charge from negative to positive according to the XPS analysis and zeta potential measurements. The membrane modified at PEI = 1500 mg·L − 1 exhibited high rejection to methylene blue (MB) and is potential to be applied in the treatment of effluents containing positively charged dyes.
研究领域:
环境工程
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膜科学
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水处理
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）