JOURNAL OF MEMBRANE SCIENCE
·
2023
·
IF 9.5
Yajie Ding,Nianxiang Qiu,Jianqiang Wang,Zhe Yang,Fu Liu,Chuyang Y. Tang
Oil fouling is an inherent threaten of membrane-based separation of oil-water emulsion, while common physical sieving membrane separation and coalescence demulsification fail to achieve long term applications and combat severe water flux declines. We hereby report an “oil-water-receiving” membrane with anomalous wettability constructed by sub-10 nm Tween 80 assembly on hydrophobic PVDF nanofibers to establish independent water and oil transmembrane passageway. Water can go through the membrane freely along the hydrophilic nanofiber surface. While emulsified oils were diverted beneath the ultra-thin hydrophilic layer and captured by PVDF bulk to form coalesced oil phase and discharged out of the nanofibrous membrane as continuous macroscopic oil phase. The membrane showed stable permeate flux as high as 536 ± 40 L m −2 h −1 bar −1 after 10 h of continuously filtering oil-in-water emulsions. The conformation assembly of surfactants with hydrophilic and hydrophobic chains provides a new strategy to fabricate anti-fouling membranes for oil/water separation.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
NATURE
·
2022
·Vol. 612
·期 7941
·673-678
·
IF 69.504
Xie Heping,Zhao Zhiyu,Liu Tao,Wu Yifan,Lan Cheng,Jiang Wenchuan,Zhu Liangyu,Wang Yunpeng,Yang Dongsheng,Shao Zongping
Electrochemical saline water electrolysis using renewable energy as input is a highly desirable and sustainable method for the mass production of green hydrogen 1 , 2 , 3 , 4 , 5 , 6 , 7 ; however, its practical viability is seriously challenged by insufficient durability because of the electrode side reactions and corrosion issues arising from the complex components of seawater. Although catalyst engineering using polyanion coatings to suppress corrosion by chloride ions or creating highly selective electrocatalysts has been extensively exploited with modest success, it is still far from satisfactory for practical applications 8 , 9 , 10 , 11 , 12 , 13 , 14 . Indirect seawater splitting by using a pre-desalination process can avoid side-reaction and corrosion problems 15 , 16 , 17 , 18 , 19 , 20 , 21 , but it requires additional energy input, making it economically less attractive. In addition, the independent bulky desalination system makes seawater electrolysis systems less flexible in terms of size. Here we propose a direct seawater electrolysis method for hydrogen production that radically addresses the side-reaction and corrosion problems. A demonstration system was stably operated at a current density of 250 milliamperes per square centimetre for over 3,200 hours under practical application conditions without failure. This strategy realizes efficient, size-flexible and scalable direct seawater electrolysis in a way similar to freshwater splitting without a notable increase in operation cost, and has high potential for practical application. Importantly, this configuration and mechanism promises further applications in simultaneous water-based effluent treatment and resource recovery and hydrogen generation in one step.
研究领域:
能源科学
·
材料科学
·
化学工程
✓ 已验证
DOI
PubMed
高影响因子
Science Advances
·
2021
·Vol. 7
·期 52
·
IF 14.143
Liping Song,Ben Bin Xu,Qian Cheng,Xiaoyuan Wang,Xiaoning Luo,Xue Chen,Tao Chen,Youju Huang
Thin film fabrication is of great importance in modern engineering. Here, we propose a universal and conformal thin film technique enabled by the wetting empowered interfacial self-assembly. By tailoring the contact angle of nanoparticle (NP), a NP monolayer can be assembled instantly (within 5 seconds) with an excellent harvesting efficiency (up to 97.5 weight %). This self-assembly strategy presents a universal applicability on various materials, e.g., nonmetal, metal, and core-shell structures, and can achieve a monolayer with same in-plane area as a 95 cm2 wafer in a single process, indicating great potential for scale-up manufacturing. Through a template transfer, we coat the surface of different substrates (plastic, paper, etc.) with the assembled film in a conformal and nondestructive “lift-on” manner and subsequently demonstrate fluorescent micropatterns. This self-assembly strategy has great implications in advancing thin film technology in a user-friendly and cost-effective fashion for applications in anti-counterfeiting, actuators, and wearable/flexible electronics.
研究领域:
材料科学
·
纳米技术
·
表面工程
✓ 已验证
DOI
高影响因子
FOOD HYDROCOLLOIDS
·
2019
·
IF 5.839
Ming Cai,Si Chen,Qinghua Ma,Kai Yang,Peilong Sun
In this study, isolation of crude oligosaccharides from Hericium erinaceus (CHOS), and its physicochemical properties and proliferative effects on lactic acid bacteria were investigated. CHOS was obtained by an integrated membrane technology with microfiltration (MF, PVDF 0.1 μm), ultrafiltration (UF, PES 1000 Da) and nanofiltration (NF, PA 300 Da) membranes as the retentate of NF. During MF, UF and NF processes, compositions of total sugars, total reducing sugars, total proteins, total polyphenols and uronic acid changed significantly. CHOS accounts for 14.84% of total polysaccharides and its purity was 63.71%. Other compounds in CHOS, including reducing sugar, protein, polyphenol, uronic acid and others were 8.06%, 4.83%, 5.65%, 6.45% and 11.30%, respectively. CHOS has a good proliferation effect on lactobacillus , which the best concentration accounts for 25% of the carbon source.
研究领域:
食品科学
·
微生物学
·
生物化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2020
·
IF 7.183
Bin Jiang,Junhan Zhou,Mi Xu,Haozhen Dou,Haiming Zhang,Na Yang,Luhong Zhang
Membrane technology is a forward-looking approach for gas separation, while the implementation of membrane with high performance for ethylene/ethane separation still challenges the world. Herein, a multifunctional ternary deep eutectic solvent (DES)-based membrane was constructed for the cost-effective ethylene/ethane separation. The incorporation of a sweetener (Al(NO 3 ) 3 ) with the AgNO 3 /methylacetamide (NMA) mixture to form a ternary DES not only significantly promoted the ethylene/ethane selectivity but also enhanced the long-term stability of resultant membranes, which killed two birds with one stone. Various spectroscopic characterization and quantum mechanical calculations revealed that the complexing interaction between Ag + and NMA and the complexing interaction between Al 3+ and NO 3 − weakened the electrostatic interaction between Ag + and NO 3 − , and improved the interaction energy between ethylene molecule and Ag + carrier. By the synergy effects of two different complexing interactions, the ternary DES-based membranes exhibited high ethylene permeability, ethylene/ethane selectivity and stability, outperforming majority of the previously published data. Therefore, the membranes proved the grand potential for ethylene/ethane separation, and this work will shed light on the design of multifunctional liquid membranes for precise molecular separation.
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Shu Xu,Jieying Liang,Munirah Izzah Binti Mohammad,Dongwei Lv,Ying Cao,Jingyao Qi,Kang Liang,Jun Ma
The micropollutants in water sources are harmful to the aquatic environment and human health, and remain a significant challenge to be completely eliminated by conventional processes. Here, an original biocatalytic enzyme/metal–organic framework (MOF) composite membrane is developed to facilitate continuous and efficient removal of micropollutants from aqueous solution. In this work, an in-situ biomineralization strategy of simultaneous MOF (zeolitic imidazolate framework-8 or ZIF-8) nucleation and immobilization of horseradish peroxidase (HRP) is employed to form an enzymatic reactive HRP@ZIF-8 layer on modified ultrafiltration membrane. Such a hybrid structure design successfully integrates selective separation with stable enzymatic catalysis to prepare a reactive molecular sieve membrane, which realizes desirable decontamination performance toward micropollutants under low pressure. The as-prepared membrane sets a new record of bisphenol A (BPA) removal efficiency of 98% accompanied with high permeance (~33.32 L/m 2 .h.bar) at continuous mode. The removal mechanism is considered to be a combination of enhanced adsorption by MOFs enriching BPA molecules near the enzymes, catalytic oxidation by enzymes breaking the adsorption saturation limitation, and also membrane retention that reduced the enzymatic burden. In addition, the biocatalytic membrane displays enhanced stability and reusability due to the protection effect by the ZIF-8 exoskeleton, demonstrating good potential for stable and efficient removal of micropollutants for water treatment.
研究领域:
环境科学
·
生物工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
VACUUM
·
2023
·
IF 4
Luobin Zhang,Jintao Wang,Sheng Zhou,Xiaojia Luo,Yufeng Li
This research is an attempt to apply the silver thick-film metallization and the soft soldering process to the ultra-high vacuum packaging of atom chips with through silicon via (TSV). During the packaging process, a vacuum environment is used to avoid oxidation of the Cu layer on the chip during heating. At the same time, tin foil is used to protect the inner wall of the glass cell to prevent the gas emitted by the solder from polluting the inner wall. In general, by the adoption of screen printing, sintered surface metallization at a constant temperature of 450–500 °C for 5 min, combined with soft soldering, the packaging of an atom chip with TSV and a silica glass cell is realized. The weld gap is less than 50 μm, the airtightness can reach 8.5 × 10 −13 Pa m 3 /s, and the vacuum degree can reach 2.18 × 10 −8 Pa. That can meet the requirements of cold atom experiment for light path and vacuum degree.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES COMMUNICATIONS
·
2025
·
IF 7.7
Yi-Wei Li,Xinyu Ai,Ruixiang Guo,Yeming Zhai,Kai-Ge Zhou
Swelling significantly limits the performance and practical applications of two-dimensional (2D) membranes in aqueous environments. Here, we present an innovative "armor strategy" to enhance the anti-swelling performance of negatively charged 2D membranes, using vermiculite membranes (VM) as a model system. By spin-coating polyethyleneimine (PEI) onto the membrane surface and cross-linking with trimesoyl chloride (TMC), a robust protective layer was formed. The resulting VM-PEI-TMC membrane (VPTM) exhibits remarkable swelling resistance, with a swelling rate of only 0.83%, compared to 23.70% for unmodified VM. Practical applications of VPTM in ion sieving, dye rejection, and high-temperature operations demonstrated stable performance, with rejection rates of methylene blue (MB), rhodamine B (RB), and potassium ferricyanide (PF) exceeding 95% at 80°C. Furthermore, the universality of the armor strategy was established by applying it to graphene oxide membranes (GM), achieving a swelling rate reduction from 55.93% to 5.02%. These results highlight the versatility and effectiveness of the armor strategy, providing a promising pathway for developing high-performance, anti-swelling 2D membranes for environmental and energy applications.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Renbo Kou,Fuxin Mi,Jieyu Qiu,Suyi Zeng,Cheng Peng,Fei Liu,Liang Xiong
Integrated tandem ultrafiltration membrane technology (UMT) was used to separate Curcuma longa polysaccharides (CLPs) into four grades: CLP-100, CLP-50, CLP-10, and CLP-5. CLP-10 was a purified polysaccharide consisting of d -glucose, L -arabinose, L -rhamnose, and D -galactose. Its backbone comprised →2)- α - L -Rha p -(1 → 2,4)- α - L -Rha p -(1 → 4)- α - D -Glc p -(1→. CLP-100 and CLP-50 showed significant protective activity against H 2 O 2 -induced oxidative stress in human umbilical vein endothelial cells (HUVECs) through the VEGFA/AKT/SOD2 pathway. The structure-activity relationship of four CLPs was further analyzed. Molecular weight ( Mw ) distribution, monosaccharide composition, and morphology were the main factors affecting the activity. In addition, a preliminary investigation into the separation mechanisms by which UMT separated the polysaccharides was conducted, which revealed potential influences of intra-molecular aggregation and inter-molecular repulsion between the polysaccharides and membrane materials. These findings provide a profound elucidation of the complex relationship between UMT and factors such as Mw , conformation, particle size, charge number, and apparent viscosity during the separation process.
研究领域:
生物化学
·
药理学
·
分子生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2023
·
IF 4.2
Lixin Xing,Jianliang Qin,Jiaming Wang,Kuandi Wang,Hanli Wang,Zhendong Yang,Gaohong He,Xuehua Ruan
Membrane technology, especially the options using highly selective and permeable materials, is the preferred alternative to conduct direct helium enrichment from natural gas. In this work, the monomers containing multiple trifluoromethyl groups, including 4,4′-(hexafluoroisopropylidene) diphthalic anhydride (6FDA) and 2,2′-bis(trifluoromethyl) benzidine (TFMB), are used to synthesize specific polyimide materials. On the one hand, fluorine element can impair affinity to methane and then enhance the selective sorption for helium. On the other hand, trifluoromethyl groups have appropriate steric hindrance to increase accessible volume for helium permeation; moreover, this steric hindrance can make the chain segments more rigid to decrease temporary large-size cavities and then hinder methane permeation. The separation tests revealed that helium permeability is up to 73 Barrer, and its selectivity against methane is up to 247 in this synthesized material after aging and compacting sufficiently. On the whole, the 6FDA-TFMB polyimide materials should be highly promising for membrane-based helium enrichment.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2019
·
IF 5.589
Maria Wasim,Aneela Sabir,Muhammad Shafiq,Rafi Ullah Khan
In the textile industry , membrane technology has been widely employed for the exclusion of direct dyes. In this research paper, firstly vapor grown carbon nanofibers (VGCNFs) were functionalized with carboxylates group via piranha oxidation, and then series of CA/PEO-PPO-PEO triblock copolymers were prepared by blending with varying weight percentages of modified VGCNFs and Zirconia (ZrO 2 ). The structural morphologies of membranes were visualized by scanning electron microscope (SEM), atomic force microscopy (AFM) and transmission electron microscopy (TEM), which exhibits the dispersity of dual fillers in polymer matrix thus improving the microstructure of resultant membranes. The experimental data indicates that the modified VGCNF and ZrO 2 nanoparticles were shown increase hydrophilic character. The direct dyes rejection were successfully after filler addition, which were 96% (for Direct Red), 99% (for Direct Blue) and 93% (for Direct Orange). The membranes showed a better antifouling property even after several washing cycles along with improved biofouling property, both of these properties showed a better membrane life. As an outcome, this research could have been a great potential to be used to treat dyes in textile industry.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2022
·
IF 3.898
Ye Yuan,Yurui Pan,Menglong Sheng,Guangyu Xing,Ming Wang,Jixiao Wang,Zhi Wang
Membrane technology features inspiring excellence from numerous separation technologies for CO 2 capture from post-combustion gas. Polyvinylamine (PVAm)-based facilitated transport membranes show significantly high separation performance, which has been proven promising for industrial scale-up. However, commercialized PVAm with low molecular weight and excessive crystallinity is not available to prepare high-performance membranes. Herein, the synthesis process of PVAm was optimized by regulating polymerization and acidic hydrolytic conditions. The membranes based on PVAm with a molecular weight of 154 kDa and crystallinity of 11.37% display high CO 2 permeance of 726 GPU and CO 2 /N 2 selectivity of 55 at a feed gas pressure of 0.50 MPa. Furthermore, we established a PVAm synthesis reactor with an annual PVAm solution (1%(mass)) capacity of over 7000 kg and realized the scaled-up manufacture of both PVAm and composite membranes.
研究领域:
材料科学
·
环境工程
✓ 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）