Materials Today Communications
·
2025
·
IF 4.5
Wen Xin,Yajun Ren,Xiaofeng Song,Honghui Teng,Na Tian,Xiyue Wang,Junfu Wang
To develop portable materials for rapid pollutant detection, a high-porosity, good shape-memory, and molecularly imprinted composite membranes were prepared by combination of synthetic polymer (P-P-PAA), molecularly imprinted polymers (MIPs) and Poly(vinyl alcohol) (PVA). The addition of P-P-PAA enhanced the porosity of the porous P-P-PAA/PVA membrane from 84.96 % to 98.41 %, which arrived at the highest, and the mechanical properties were improved to 1.65 MPa and 154.9 %. The membrane achieved shape recovery within 20 s via the external water stimuli. Compared to the imprinted PVA, the imprinted composite membrane enhanced detectability and speed for Glyphosate (GLY) which reached 50 mg/g within 30 min. Overall, this work successfully developed a shape-memory porous imprinting membrane, which not only offers a new strategy for enhancing detection efficiency but also promotes the advancement of smart membrane materials for on-site water quality monitoring.
研究领域:
环境科学
·
分析化学
·
功能材料
·
水处理技术
·
传感器开发
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Juan Qiao,Junfang Jiang,Lili Liu,Ji Shen,Li Qi
The challenge for polymeric enzyme reactors at present is to selectively control the enzymolysis rate in complex conditions. Additionally, the fabrication methodology is hindered by complex processes, especially for achieving diverse stimuli responsiveness and functions. Here, we reported a kind of pH-sensitive polymer, poly(styrene-co-maleic anhydride-acrylic acid) (PS-MAn-AA)-based hybrid enzyme reactor. It comprised magnetic nanoparticles and a pH-sensitive PS-MAn-AA porous polymer membrane made by breath figure method. The enzyme l-asparaginase (l-ASNase) could covalently bond on the surface of the pH-sensitive porous polymer membrane (pH-PPM), and the resultant enzyme reactor was characterized by Fourier transform infrared spectroscopy and vibrating sample magnetometer. The apparent Michaelis–Menten constants (Km and Vmax) of the l-ASNase enzyme reactor at different pH values were determined by a chiral ligand-exchange capillary electrophoresis method with l-asparagine as the substrate. The Vmax value of the l-ASNase enzyme reactor (0.67 mM/min) was almost 3-fold of that of the free l-ASNase (0.23 mM/min) at pH 8.2. Its ability to precisely control the enzymolysis rate in complex conditions is triggered primarily by the pH of the buffer solution, allowing controlled enzymatic reactions and displaying excellent stability and reusability of the proposed pH-PPM. This strategy for porous polymer membrane enzyme reactor fabrication has established a platform for enzyme efficiency adjusting. These valve-like distinguished features highlight the outstanding potential of stimuli-responsive enzyme reactor applied for enzyme immobilization and enzyme-related disease treatment.
研究领域:
生物化学
·
材料科学
·
酶工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2017
·
IF 3.359
Guosheng Wang,Chuanyang Zhang,Mengjie Sun,Xu Zhang,Cuiming Wu,Yonghui Wu
Porous sulfonated polyethersulfone and polysulfone (SPES and SPSf) cation exchange membranes were prepared by phase inversion process, in which water was used as the coagulation bath at 4 °C or 25 °C. Dense SPES and SPSf cation exchange membranes were also prepared for comparison. Characterizations of the membrane structure, morphology and physico-chemical properties showed that the dense membranes are hydrophobic with large area resistance (>80 Ω cm 2 ), while the porous membranes are hydrophilic with low area resistance (0.35–18.62 Ω cm 2 ). The porous SPSf membranes have lower area resistance (0.35–0.81 Ω cm 2 ) than SPES membranes due to their higher water uptake (289.1–370.1%) and special morphology containing oval-shaped pores in the top skin layer. The membranes are utilized in bipolar membrane electrodialysis (BMED) process to separate the mixed amino acids of l -glutamic acid (Glu) and l -lysine (Lys). Though the dense membranes are unsuitable for electrodialysis experiments due to the large area resistance, the porous membranes have higher recovery ratio and current efficiency than the commercial membrane CMX, for the Lys + can migrate through the porous membranes with lower hindrance. In addition, the SPSf membranes have higher Glu leakage ratio (13.9–15.3%) and lower energy consumption (4.82–6.52 kWh/kg) than the SPES membranes (∼0%, 6.43–9.53 kWh/kg). What’s more, the water permeation can be controlled by membrane materials and pore structures.
研究领域:
化学工程
·
生物技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Dan Ren,Yu-Tao Jin,Tian-Yin Liu,Xiaolin Wang
The selective separation of ions in terms of extremely similar size and properties remains an important challenge in water purification. We innovated a kind of porous nanofilm via interfacial polymerization using rigid heterocyclic ligands to achieve high valent cation selectivity and rapid water/ion transport. The interconnected microporosity and uniformly distributed cation-affinitive sites of the ultrathin membranes enabled water permeation (7.5 L m–2 h–1 bar–1), ion permeance of Na+ (1.5 mol m–2 h–1 bar–1), and Mg2+/Na+ permselectivity (2.1) during nanofiltration. The forward osmosis exhibited a prominent water flux of 95 LMH at 1 M NaCl draw solution, which expanded various applications. The polyarylate membranes comprising 4,7-diphenyl-1,10-phenanthroline showed a higher water permeation and ion selectivity than the planar monomers, e.g., resorcinol. A distinct fluorescence responsiveness existed between membranes and cations for the interaction characterization. Host–guest nuclear magnetic resonance (NMR) spectroscopy and solid-state nuclear magnetic resonance spectroscopy characterized the preferential affinitive of divalent/high-valent cations in the interconnected microporous powders; an ultraviolet spectrophotometer characterized the light responsiveness of the porous nanofilms. Such an active membrane has potential applications in selective separation and adsorption of cations, photocatalytic materials, photosensors, and other fields.
研究领域:
材料科学
·
环境工程
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Lei Guo,Hongfang Zhang
Biohybrids formed by encapsulating enzymes in hydrogen-bonded organic framework (HOF) have demonstrated promising applications in catalysis and biosensing. Herein, urease (Ur) was incorporated into a stable HOF named PFC-1 by initiating the self-assembly of organic monomers of PFC-1 using surface residues of the enzyme. The ultimate hybrids Ur-PFC-1 were characterized to confirm its similar structure with PFC-1 and successful Ur loading. A unique sandwich structure, using two nanoporous membranes as slices and Ur-PFC-1 as jam, was constructed. The nanochannels of the porous membranes provided ordered passageway for ion flux, which enabled the electrochemical detection of urea by measuring the ionic current. Ammonia generated by the catalytic hydrolysis of urea by Ur would affect the surface charge of the nanochannels and alter the ion current. This quantitative method exhibits a linear range of 25 pM to 2.8 μM with a detection limit of 12 pM. What’s more, this method has good repeatability and selectivity, and can be used for the detection of urea in serum samples.
研究领域:
生物化学
·
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2016
·
IF 5.267
Yangyang Han,Xiaodong Wu,Xinxing Zhang,Zehang Zhou,Canhui Lu
A novel and straightforward synthetic strategy was developed to prepare silver nanoparticles-doped cellulose microgels (Ag NPs@CMG) nanohybrids at room temperature. Residual alkali (sodium hydroxide/urea) from a cellulose dissolving system was reused and acted as a functional accelerant, which made it possible for Ag+ to be reduced to Ag0 by CMG at room temperature, yielding Ag NPs decorated on CMG. The as-prepared Ag NPs@CMG nanohybrids exhibited excellent catalytic performance in reduction of 4-nitrophenol and organic dyes. Moreover, the Ag NPs@CMG nanohybrids were capable to form a desirable porous membrane for catalyzing and simultaneous product separation. Reactants passing through the membrane could be catalytically transformed to product, which is of great significance for water treatment. As a demonstration, three kinds of organic dye solutions were successfully decolorized by using a Ag NPs@CMG nanohybrids-based membrane. The simplicity, sustainability, and straightforwardness of this approach to prepare a highly efficient catalyst and functional membrane open up new possibilities for large-scale production and application of bioresources/noble metal nanohybrids in various fields.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2021
·
IF 8.742
Zhecun Wang,Jianlin Yang,Xiadong Dai,Jing Guo,Shenghai Li,Tauqir A. Sherazi,Suobo Zhang
Directional liquid transport driven by the interface or surface property of Janus porous membrane owes great significance to many applications such as separation technology, fog collection, and energy devices. The Janus porous membranes have successfully demonstrated an efficient oil self-transport in water and also enable directional water transport in air or oil-water interface. However, the directional water transport in oil environment is a challenge because of the relatively low surface tension of oil. In this work, a novel integrated Janus porous membrane is developed for the first time to construct self-propelled energy free directional water transport in oil system that successfully demonstrated to be a facile “water diode” for under-oil water one-way regulation. Additionally, this Janus porous membrane exhibits an interesting tunable fluid-gating behavior for either water or oil, using optimized conditions. The current findings may promote the innovation towards directional liquid transport science and will open up new avenues for diverse on-demand liquids manipulation scenarios such as water-in-heavy oil emulsion separation.
研究领域:
材料科学
·
界面化学
·
分离技术
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Yan Liang,Yongqing Wang,Junjie Qian,Mingmin Bai,Yulong Yang,Ruiqiang Yang,Long Cheng,Yue Cha
In this study, in-situ growth of columnar mullite reinforced silicon carbide porous membrane supports were prepared, and the addition of TiO 2 helped to reduce the sintering temperature for the anisotropic growth of necked columnar mullite crystals. The synthesis of in situ columnar mullite makes reasonable use of the oxidized silica of silicon carbide, and in turn reduces the loss of the silicon carbide porous membrane support under strong corrosive conditions. The material showed a flexural strength of up to 72.95 MPa, and a water flux of 31612.83 L·m -2 ·h -1 ·bar -1 when sintered for 2 h in an air environment at 1250 °C. The flexural strength after corrosion in 20 vol% H 2 SO 4 and 1 wt% NaOH solution (90 °C) exceeded 93%. This shows that this porous silicon carbide ceramic membrane scaffold has potential applications in the field of water treatment under harsh environments.
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
JOURNAL OF MEMBRANE SCIENCE
·
2019
·
IF 7.015
Rui Zhang,Tianxu Zhou,Hongwei Peng,Min Li,Xuedong Zhu,Yuan Yao
A nano-porous and switchable pH-responsive polymeric membrane was fabricated through filtration technique with the assist of metal hydroxide nanostrands as template. A common used spherical polyelectrolyte brush (SPB), PAA@PS (poly (acrylic acid)) brushes grafted on polystyrene nanospheres , employed in this work as polymeric membrane. It features tunable pore size on line by shrinkage or stretching of PAA brushes under different pH value or ionic strength . Furthermore, both the length of PAA chains and the dimension of PS cores could tailor the pore size of the membrane effectively. These properties of PAA@PS membrane could separate nanoparticles within 10 nm with precise size-selective permeation. Meanwhile, since the membrane was endowed negative charge by PAA brushes, the membrane could adsorb and separate positive charge nanoparticles including dyes though the mixture solution effectively. Herein, this stimuli-responsive membrane is promising in the separation of ultrafine nanoparticles with precise size and charge selectivity.
研究领域:
材料科学
·
化学工程
·
生物分离技术
✓ 已验证
DOI
高影响因子
CHINESE CHEMICAL LETTERS
·
2015
·
IF 1.587
Hong-Yu Luo,Min Zhang,Nai-Chao Si,Min-Jia Meng,Li Yan,Wen-Jing Zhu,Chun-Xiang Li
In this study, novel molecularly imprinted open porous membranes (MIOPMs) were prepared using the Pickering HIPEs template method and molecular imprinting technology for selective adsorption and separation of methyl 4-hydroxybenzoate (M4HB). The template M4HB, functional monomers, crosslinker and plastifier 2-ethylhexyl acrylate (2-EHA) were contained in the oil phase. Hydrophobic silica nanoparticles (HNP-SiO 2 ) were employed as a stabilizer to establish stable W/O Pickering HIPEs with nonionic surfactant sorbitantrioleate (Span 85). The results of SEM and FTIR indicated that the optimal MIOPMs were prepared successfully and possessed open and interconnecting pores. Then, the MIOPMs were used as sorbents for M4HB. The correlation coefficient ( R 2 ) values for the Langmuir–Freundlich isotherm model and pseudo-second-order kinetic model fitting to the adsorption equilibrium and kinetic data respectively were all higher than 0.95. The maximum adsorption capacity and the time of rapid adsorption for MIOPM 4 were 4.146 mg g −1 and 100 min, respectively. In addition, the permeability separation factor of MIOPMs for M4HB compared to a structurally related analog methyl 2-hydroxybenzoate (M2HB) could reach 3.122.
研究领域:
材料科学
·
分离技术
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2024
·Vol. 36
·期 36
·2309572
·
IF 27.4
Bo Wang,Wen-tai Zhao,Xiao Xu,Chen Zhang,Shuai-ying Ding,Yue Zhang,Tie Wang
The construction of ultrathin porous membranes with stable structures is critical for achieving efficient gas separation. Inspired by the binary-cooperative structural features of bones and teeth—composed of rigid hydroxyapatite and flexible collagen, which confer excellent mechanical strength—a binary-cooperative porous membrane constructed with gel-state zeolitic imidazolate frameworks (g-ZIFs), synthesized using a metal-gel-induced strategy, is proposed. The enlarged cavity size and flexible frameworks of the g-ZIF nanoparticles significantly improve gas adsorption and diffusion, respectively. After thermal treatment, the coordination structures forming rigid segments in the g-ZIF membranes appear at the stacked g-ZIF boundaries, exhibiting a higher Young's modulus than the g-ZIF nanoparticles, denoted as the flexible segments. The g-ZIF membranes demonstrate excellent tensile and compression resistances, attributed to the effective translation of binary-cooperative effects of rigidity and flexibility into the membranes. The resulting dual-aperture structure, composed of g-ZIF nanoparticles surrounded by nanoscale apertures at the boundaries, yields a membrane with a stable CO 2 permeance of 4834 GPU and CO 2 /CH 4 selectivity of 90 within 3.0 MPa.
研究领域:
材料科学
·
化学工程
·
膜技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Composites and Hybrid Materials
·
2024
·Vol. 7
·期 6
·1-11
·
IF 23.2
Wei Renbo,Huo Qi,Liu Kexin,Elnaggar Ashraf Y.,El-Bahy Salah M.,El-Bahy Zeinhom M.,Ren Juanna,Wang Lingling,Wu Zijian
With the burgeoning application of diverse electronic equipment in daily life and national defense, the requirements for electromagnetic interference shielding effectiveness (EMISE) are constantly increasing. The precise adjustment of pore structure and the controllable distribution of conductive fillers in pores have become key challenges in optimizing EMISE of porous materials. Herein, we fabricated fluorinated carbon nanotube (FCNT) and polyarylene ether nitrile (PEN) FCNT/PEN composites with advanced EMISE by precisely controlling the pore structure of PEN porous films via delayed phase conversion (DPC) method and distributing FCNT on the obtained pore walls. Dispersion and electronegativity of carbon nanotube are firstly modified by fluorination treatment, offering FCNT. The pore structures of PEN porous films with enriched FCNT on their pore walls are adjusted by changing constitution of coagulation bath and amount of porogen PVP K30. Benefiting from the separated pore structure and continuous conducting network of FCNT inside the pore, these porous films exhibit up to 27.3 dB absorption dominated EMISE with a low conductivity of 0.06 S/m. Further continuous hot pressing on these porous films results in thinner and denser films whose specific EMISE reaches an astonishing value of 6794.9 dB/cm. This in situ self-assembly of FCNT during the DPC process achieving the directional distribution of fillers in the prepared porous films initiates a novel approach for fabricating materials with advanced EMISE.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）