Scientific Reports
·
2017
·Vol. 7
·期 1
·1-10
·
IF 4.259
Yu Bing,Song Qianqian,Cong Hailin,Xu Xiaodan,Han Dongwei,Geng Zhongmin,Zhang Xiaoyan,Usman Muhammad
In this paper, a thermo- and pH-responsive microfiltration membrane was prepared based on three-dimensional (3D) inverse colloidal crystals (ICC). To manufacture the smart ICC membrane, the typical thermo-responsive N-isopropylacrylamide (NIPAM) and pH-responsive methacrylic acid (MAA) were polymerized inside silica colloidal crystals. The smart ICC membranes were characterized by SEM, IR and contact angle measurements. Moreover, the permeability of smart microfiltration membrane was carried out by the KCl diffusion tests. The result showed that effective diameter of the polymer ICC membrane can be reversible tuned by temperature and pH. Besides, the functional ICC membrane showed outstanding temperature- and pH-responsive gating property, which was applied to separate particles of different sizes. The savvy environment-responsive gating membranes have potential uses in filtration, separation, purification, sensor and other applications.
研究领域:
材料科学
·
化学工程
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Dong Wu,Hao li,Guangxing Pan,Mi Wang,Wen Yu,Gui-Gen Wang,Jiaheng Zhang
Water pollution from organic oily solvents and dyes is a major global problem. While some wettable materials exist for oily pollutants, few can effectively separate different oil–water emulsions and dyes. To address this problem, we developed a smart citric acid-crosslinked bamboo powder-coated membrane (CBM) with approprite surface roughness and switchable wettability. The CBM membrane is superhydrophobic in oil and superoleophobic in water, making it highly effective in separating oil–water emulsions and dyes. The membrane can efficiently separate various oil–water emulsions, including crude oil-in-water emulsions, with a separation efficiency of 99.76 % and a high flux of 1756 L/m 2 /h. It also adsorbs anionic (e.g. Congo red) and cationic (e.g. methylene blue) dyes in wastewater, with an adsorption rate of 99.45 % after multiple cycles. The membrane can simultaneously separate oil-in-water emulsions and remove dyes from water, facilitating high-value utilization of biomass waste and offering great promise for addressing global water pollution from oily organic solvents and dyes.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2017
·
IF 6.035
Bowen Cheng,Zongjie Li,Quanxiang Li,Jingge Ju,Weimin Kang,Minoo Naebe
A smart tree-like nanofiber membrane with pH-responsivity was successfully fabricated by electrospinning poly(vinylidene fluoride)-graft-poly(acrylic acid) (PVDF-g-PAA). X-ray photoelectron spectroscopy, field emission scanning electron microscopy , Fourier transform infrared spectroscopy , and Brunauer-Emmett-Teller surface area measurement were employed to study the molecular structure and morphology of membranes. Through realizing protonation and deprotonation in response to the pH of the aqueous media, the as-prepared membrane is able to alter its wettability and conformation, resulting in the switchable surface oil/water wettability in the aqueous media. More importantly, the as-prepared membrane realized on-demand oil/water separation using gravity alone by switching the pH of the medium. Both separations exhibited excellent efficiency and flux which were attributed to the tree-like structure of the membrane. We believed that this smart membrane with such excellent controllable permeation has potential to be used for several applications, such as water purification , oil recovery and some separation systems.
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
Small
·
2025
·
IF 12.1
Yi Huang,Ruobing Yi,Yu Qiang,Binyou Xie,Min Zhang,Shanshan Liang,Junlang Chen,Shuai Wang,Liang Chen
Intelligent membranes with programmable permeance and precise sieving performance are in high demand for complex water treatment scenarios. Herein, a bioinspired membrane featuring intelligent adaptive 2D nanochannels with outstanding molecule sieving performance is reported. In particular, a protein-mimetic 2D nanochannel with pH-responsive characteristics is constructed by introducing sodium alginate (SA) molecular chains into GO laminates. The conformational transformation of SA chains under varying pH conditions enables adaptive regulation of the 2D channel size and selective molecular transport. The resulting GO-SA membrane possesses outstanding water permeance up to 122.67 L m −2 h −1 bar −1 , along with a high sieving response factor of 50.12. Besides, it is discovered that the introduction of multivalent Ca 2+ ions can stabilize the membrane structure, thereby “locking” the pH-responsive behavior. Based on this, the water treatment system is designed can not only realize the multistage separation of dye molecules, but also enable the recovery and recycling of acid and alkali. This strategy provides insights for designing intelligent membranes with gated responses.
研究领域:
材料科学
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环境工程
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生物学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2019
·
IF 7.015
Yuan Wang,Zhuang Liu,Feng Luo,Han-Yu Peng,Shu-Gui Zhang,Rui Xie,Xiao-Jie Ju,Wei Wang,Yousef Faraj,Liang-Yin Chu
A novel smart membrane with ion-recognizable nanogels as gates on interconnected pores is developed for simple and rapid detection of trace lead(II) ions in water. The membrane is prepared via one-step vapor-induced phase separation (VIPS) method, and featured with interconnected porous structure and Pb 2+ -responsive poly( N -isopropylacrylamide- co -benzo-18-crown-6-acrylamide) (PNB) nanogels on polyethersulfone (PES) membrane pore surfaces as gates. Afforded by such a unique architecture, both high flux and significant responsive characteristics are achieved. With the proposed strategy, the nanogels are fixed onto the membrane pore surfaces during the formation of interconnected porous structure; thus, the immobilization of nanogels onto the membrane pore surfaces does not result in the decrease of pore sizes. The water fluxes of fabricated membranes could be even higher than 6000 kg m −2 h −1 driven by the static pressure of 20 cm water column under gravity at 34 °C, because of the three-dimensionally interconnected porous structures. Due to high sensitivity and selectivity of PNB nanogels on the membrane pore surfaces in response to Pb 2+ ions, the fabricated membranes can efficiently detect Pb 2+ ions with a limit of detection as low as 10 −9 mol/L. With the proposed novel membrane, rapid detection of trace lead(II) ions in water can be easily achieved by simply monitoring the trans-membrane flux change in a gravity-driven membrane module device, which is highly potential and promising in real-time and easy-to-popularize monitoring of drinking water safety and may expand the scope of applications of facile detection techniques.
研究领域:
材料科学
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环境科学
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分析化学
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产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 25
·11874-11883
·
IF 9.931
Huawen Liu,Xueting Zhao,Ning Jia,Arcadio Sotto,Yan Zhao,Jiangnan Shen,Congjie Gao,Bart van der Bruggen
Inspired by stomata, a series of single or dual thermo-/pH-responsive smart gating membranes (SGMs) were prepared with in situ assembled stimuli-responsive microgels as gates. Highly cross-linked poly(N-isopropylacrylamide-co-methylacrylic acid) P(NIPAM-co-MAA) microgels underwent in situ surface segregation during the acetic acid-assisted phase inversion process, and they were uniformly decorated on the surface of the membranes and the channels. The hydraulic permeability performance of SGMs was studied within the temperature range of 25–70 °C and a wide pH range (spanning pH 3–11). Investigations revealed that microgels based on different NIPAM/MAA ratios provided different thermo/pH-responsive properties to SGMs. Higher NIPAM/MAA ratios determined the thermo-responsive performance, and higher MAA/NIPAM ratios determined the pH-responsive performance. Moreover, the SGMs with in situ assembled microgels on the surface and channel surface have enhanced gating coefficients, stimuli-reversible behaviours and self-cleaning performance.
研究领域:
材料科学
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化学工程
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生物仿生学
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产品关联
DOI
高影响因子
MOLECULES
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2024
·Vol. 29
·期 23
·5733
·
IF 4.2
Hong Jiang,Jiarong Wang,Ying Liang,Chuan Qiao
For the removal of waterborne pathogens in remote areas and disaster emergency situations, point-source water treatment methods are more suitable. Photothermal sterilization is ideal for point-of-use (POU) systems, as it effectively eliminates pathogens without secondary pollution or bacterial resistance issues. By combining photothermal with membrane treatment, these membranes rapidly heat up under near-infrared (NIR) light, enabling both bacterial retention and sterilization. However, the decrease in membrane flux due to pore clogging during water treatment can significantly impact membrane efficiency. And adjusting the membrane pore size can significantly enhance flux recovery during cleaning, thereby restoring membrane efficiency. By synthesis multifunctional membranes that combine bacteria retention, sterilization, and flux recovery, it can meet the requirements of point-source water treatment: compact size, high efficiency, good safety, and easy maintenance. In this study, we developed an intelligent thermally responsive membrane (NIPAN@CNTs/PAN) by incorporating carbon nanotubes (CNTs) and forming a copolymer of N-isopropylacrylamide and polyacrylonitrile (NIPAN) coating into polyacrylonitrile membranes, offering dual functions of photothermal sterilization and self-cleaning. With 3% CNTs, the membrane achieves 100% sterilization within 6 min of NIR exposure, while the NIPAN layer’s added roughness boosts photothermal efficiency, achieving 100% sterilization within 4 min. Rinsing at 50 °C improved flux recovery from 50% to 87% and reduced irreversible fouling from 49.7% to 12.9%, demonstrating stable performance over multiple cycles and highlighting its potential for long-term use in practical POU applications.
研究领域:
环境科学
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材料科学
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水处理工程
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产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 18
·8934-8948
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IF 11.301
Ran Wei,Jiabei Guo,Lunqiang Jin,Chao He,Yi Xie,Xiang Zhang,Weifeng Zhao,Changsheng Zhao
As an important type of smart membrane, stimuli-responsive membranes with switchable separation capability and permeability are urgently needed for developing advanced filtration membranes. In this study, smart membranes with anion-/near-infrared (NIR)-responsive and improved anti-fouling properties were fabricated by introducing poly(ionic liquid) (PIL) modified Fe3O4 nanoparticles on the surfaces and pore channels of polyethersulfone membranes through the vapor induced phase separation (VIPS) method. Thanks to the anion-/NIR-responsiveness of the nanoparticles, adjustable surface wettability and pore sizes of the membranes were obtained. The fluxes of the membranes were well-controlled along with adjusting the sizes of the nanoparticles via anion-exchange and NIR irradiation. The switchable pore size was further demonstrated by the filtration of polyethylene glycol (PEG)-800 and PEG-2000. In addition, the wettability and zeta-potential of the membrane surfaces could be adjusted by exchanging the counteranions of the immobilized PIL nanoparticles, which endowed the membranes with robust anti-fouling abilities toward biological contaminants like bovine serum albumin when changing the counteranions from hydrophilic to hydrophobic. After the counteranion exchange desorption, the intelligent membranes were then self-cleaned.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Jiazhuo Huang,Dongying Han,Yilin Shi,Qingbiao Li,Daohua Sun
Oil-water separation membranes with the merits of low energy consumption and high efficiency, have played an irreplaceable role in both industrial wastewater treatment and oil purification. Nevertheless, the simple preparation of an intelligent responsive membrane with rapid cyclic response, non-toxicity, and high efficiency remains a substantial challenge. In this paper, the material with ethanol-induced wettability conversion was prepared by hydrothermal and impregnation methods. Notably, the material can rapidly switch between superhydrophobicity and superhydrophilicity in less than 2 min, with more than 10 cycles of reversibility. The reasons have been insightfully revealed for the changes in the wettability of the membrane through surface energy physical parameters. Significantly, various oil–water mixtures were separated with high efficiency (99.7 %) and high flux (3.46 × 10 4 L·m −2 ·h −1 ) by gravity alone before and after the membrane wettability transition. In addition, the material exhibited excellent durability (more than 10 times), chemical and mechanical stability. This controllable wettability surface with the advantages of easy preparation, low cost, fast reversible response, wear resistance and durability, being expected to play an essential role in on-demand oil–water separation applications.
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
Nature Communications
·
2017
·Vol. 8
·期 1
·1-9
·
IF 12.124
Liu Jingchong,Wang Nü,Yu Li-Juan,Karton Amir,Li Wen,Zhang Weixia,Guo Fengyun,Hou Lanlan,Cheng Qunfeng,Jiang Lei,Weitz David A.,Zhao Yong
Smart regulation of substance permeability through porous membranes is highly desirable for membrane applications. Inspired by the stomatal closure feature of plant leaves at relatively high temperature, here we report a nano-gating membrane with a negative temperature-response coefficient that is capable of tunable water gating and precise small molecule separation. The membrane is composed of poly( N -isopropylacrylamide) covalently bound to graphene oxide via free-radical polymerization. By virtue of the temperature tunable lamellar spaces of the graphene oxide nanosheets, the water permeance of the membrane could be reversibly regulated with a high gating ratio. Moreover, the space tunability endows the membrane with the capability of gradually separating multiple molecules of different sizes. This nano-gating membrane expands the scope of temperature-responsive membranes and has great potential applications in smart gating systems and molecular separation.
研究领域:
材料科学
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化学工程
·
生物启发设计
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CONTROL
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2024
·
IF 5.6
Ning Li,Chang Liu,Li Niu,Xu Li,Jacko Feng,Zhiming Liu
In this study, we introduced an innovative method by incorporating 1-butyl-3-methylimidazolium chloride (BmimCl) as a versatile component and fine-tuning the mixture of chitosan, BmimCl, and cyanidin cation (Anth) to create pH-responsive smart films for food freshness. Owing to the dual functionality of BmimCl, it served as a plasticizer as well as enhanced the film’s capacity to display a broader spectrum of visible color changes. The material properties of chitosan films containing BmimCl and Anth at varying concentrations were characterized using FTIR, XRD, mechanical test, TGA, UV-vis and pH sensitivity. The combined results indicate that the chitosan-based pH-responsive smart film possessed excellent mechanical properties, great thermal stability, high light transmission, and a broad pH sensitivity. pH-responsive films were used for real-time freshness monitoring of freshwater shrimps, sterilized milk, and hairtails. Results revealed that BmimCl disrupts the hydrogen bond network of chitosan molecules. The films exhibit a transition from green to red as the food turns from fresh to spoiled, effectively demonstrating their capability to monitor freshness.
研究领域:
食品科学
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材料科学
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产品关联
DOI
高影响因子
RSC Advances
·
2021
·Vol. 12
·期 1
·517-527
·
IF 3.361
Qingping Xin,Meixue Zhao,Jianping Guo,Dandan Huang,Yinan Zeng,Yuhang Zhao,Teng Zhang,Lei Zhang,Shaofei Wang,Yuzhong Zhang
Exploring a new type of smart membrane with tunable separation performance is a promising area of research. In this study, new light-responsive metal–organic framework [Co(azpy)] sheets were prepared by a facile microwave method for the first time, and were then incorporated into a polymer matrix to fabricate smart mixed matrix membranes (MMMs) applied for flue gas desulfurization and decarburization. The smart MMMs exhibited significantly elevated SO2(CO2)/N2 selectivity by 184(166)% in comparison with an unfilled polymer membrane. The light-responsive characteristic of the smart MMMs was investigated, and the permeability and selectivity of the Co(azpy) sheets-loaded smart MMMs were able to respond to external light stimuli. In particular, the selectivity of the smart MMM at the Co(azpy) content of 20% for the SO2/N2 system could be switched between 341 and 211 in situ irradiated with Vis and UV light, while the SO2 permeability switched between 58 Barrer and 36 Barrer, respectively. This switching influence was mainly ascribed to the increased SO2 adsorption capacity in the visible light condition, as verified by adsorption test. The CO2 permeability and CO2/N2 selectivity of MMMs in the humidified state could achieve 248 Barrer and 103.2, surpassing the Robeson's upper bound reported in 2019.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）