JOURNAL OF MEMBRANE SCIENCE
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2023
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IF 9.5
Guangming Yan,Haoran Lu,Shushan Yuan,Xiao Deng,Junyong Zhu,Gang Zhang
In this study, a new category of copolymer was designed by side grafting of tertiary amines (TA) on polyaryl ether sulfone. The synthesized copolymers PES/ATA displayed superior thermal properties with a glass transition temperature of 200–225 °C. These copolymers with favorable film-forming properties were used to fabricate ultrafiltration membranes via a phase inversion approach. Surprisingly, it was found that the filtration performance of these resultant membranes could be reversibly tuned between a facile acid oxidation (CH 3 COOH:H 2 SO 4 :H 2 O 2 = 40:1:1) and alkali solution (solution of 20 wt% NaOH, immersed for 4–8 h) treatment. While the water flux of dye solution had a twofold reduction, the oxidized membranes showed distinctly enhancement of methylene blue rejection from 35% to 91.5% after oxidation treatment. Subsequently, alkali treatment of the oxidized membranes allowed their water flux to recover up to 89% as that of pristine membranes, and the methylene blue rejection can recover to almost the same as that of pristine membranes. This phenomenon was closely related to the introduced reactive TA units: the TA group in the polymeric membrane was converted into stimulus-responsive amine oxide (AO) unit, then its charge can be reversibly changed between the acid oxidation and alkali treatment, and that can be used to tune the electrostatic repulsion and further tuned the membrane pore size. In addition, compared with the polyarylene sulfone membrane, the mechanical properties of these membrane had almost no deterioration after several treatment cycle. This study supplies a novel and facile routine to fabricate functional membranes with reversible-tunable filtration properties.
研究领域:
材料科学
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膜分离技术
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DOI
高影响因子
Materials Research Express
·
2021
·Vol. 8
·期 6
·065306
·
IF 1.62
Shangjie Jiang,Shisheng Zhou
In this paper, a simple method for preparing high stability superhydrophobic paper with pH-induced wettability transition was proposed. Firstly, the pH-responsive monomer 2- (dimethylamino) ethyl methacrylate (DMAEMA), the silicon-containing crosslinking monomer 3-trimethoxysilyl propyl methacrylate (TSPM) and the fluorine-containing monomer hexafluorobutyl methacrylate (HFMA) were polymerized to prepare the pH-responsive polymer PHFMA-PTSPM-PDMAEMA. Afterwards, the amino-modified SiO2 was grafted onto the polymer to provide roughness and then coated on the paper to prepare the superhydrophobic paper with pH-responsive properties. Further research found that the modified paper prepared by this method not only has strong stability and transparency, but also can realize the reversible regulation of superhydrophobic & lipophilic and super-oleophobic & hydrophilic properties under different pH-induction, and it has important application value in the field of oil-water separation in industrial applications.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
Journal of Pharmaceutical Analysis
·
2021
·
IF 4.769
Juan Tan,Shiyue Wu,Qingqing Cai,Yi Wang,Pu Zhang
Regulating the catalytic activity of nanozymes is significant for their applications in various fields. Here, we demonstrate a new strategy to achieve reversible regulation of the nanozyme's activity for sensing purpose. This strategy involves the use of zero-dimensional MoS 2 quantum dots (MQDs) as the building blocks of nanozymes which display very weak peroxidase (POD)-like activity. Interestingly, such POD-like activity of the MQDs largely enhances in the presence of Fe 3+ while diminishes with the addition of captopril thereafter. Further investigations identify the mechanism of Fe 3+ -mediated aggregation-induced enhancement of the POD-like activity and the inhibitory effect of captopril on the enhancement, which is highly dependent on their concentrations. Based on this finding, a colorimetric method for the detection of captopril is developed. This sensing approach exhibits the merits of simplicity, rapidness, reliability, and low cost, which has been successfully applied in quality control of captopril in pharmaceutical products. Moreover, the present sensing platform allows smartphone read-out, which has promising applications in point-of-care testing devices for clinical diagnosis and drug analysis.
研究领域:
纳米生物学
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药物分析
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生物传感
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DOI
PubMed
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2020
·Vol. 36
·期 2
·301-306
·
IF 1.063
Liu Shuo,Yang Mingjie,Guo Weiwei
Metal-organic frameworks(MOFs)-based nanozyme plays an important role in biosensing, therapy and catalysis. In this study, the effects of single-stranded DNA(ssDNA) with programmable sequences and its complementary DNA(TDNA) on the intrinsic peroxidase-like activity of hemin loaded MOFs(UiO-66- 2 ), denoted as hemin@UiO-66-NH 2 , were investigated. The hemin@UiO-66- 2 exhibited improved catalytic activity compared with free hemin. However, the catalytic activity is inhibited in the presence of ssDNA, as ssDNA can be adsorbed by MOFs and therefore protected the active sites from contact with substrates. Upon the addition of the T DNA , double-stranded DNA(dsDNA) was formed and detached from the MOFs, resulting in the recovery of catalytic activity. Sequentially adding ssDNA or its complementary DNA strands can achieve the reversible regulation of the catalytic activity of MOFs nanozymes. Moreover, the DNA hybridization-based regulation was further applied to a cascaded catalytic system composed of the nanozyme, hemin@UiO-66-NH 2 , and glucose oxidase. These nanozyme based programmable and reversibly regulated catalytic systems may have potential applications in future smart biosensing and catalysis systems.
研究领域:
生物化学
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纳米医学
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催化科学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2021
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IF 13.273
Shuyu Wang,Shuang Cai,Xuefeng Liu,Yongmin Zhang,Yinjun Fang
How to recycle surfactant and retrieve hydrophobic organic contaminants (HOCs) in the remediation of HOCs-polluted soil by means of surfactant-enhanced soil washing (SESW) is still a significant challenge. Here, a proof-of-concept strategy for solubilizing a model HOC of phenanthrene (Phe) in artificial Phe-polluted sand and co-pricipitating surfactant-Phe from the SESW effluent by reversible tuning Krafft temperature (K T ) of surfactant via CO 2 /N 2 -bubbling was reported for the first time. In the presence of N,N,N’,N’ -tetramethyl-1,2-ethylenediamine (TEMDA), the K T of sodium alkyl sulphonates (C n AS, n = 12, 14 and 16) was reduced after CO 2 -bubbling because of the formation of TEMDA carbonates; in contrast, the TEMDA carbonates could be deprotonated after the removal of CO 2 by N 2 -bubbling, which enabled the K T to increase, allowing subsequent precipitation of C n AS. By alternating CO 2 - and N 2 -bubbling, the K T of C n AS-TEMDA could be reversibly switched over 10 cycles without causing obvious adverse distortions. The potential usage of this novel K T -tuning strategy was demonstrated in a conceptual C 12 AS-TEMDA-enhanced Phe-polluted sand washing. About 99.9% of Phe was solubilized by C 12 AS at room temperature, about 92% of C 12 AS and 99% of Phe could be co-precipitated, allowing both the total organic carbon and chemical oxygen demand of the residue wastewater were remarkably reduced to less than 25 mg L −1 after a simple and conventional treatment with active carbon and ion-exchange resin. The precipitated C 12 AS could be separated from Phe by a simple Soxhlet extraction.
研究领域:
环境科学
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化学工程
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污染治理
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2023
·
IF 9.5
Xiao Deng,Zhaohuan Mai,Haohan Wan,Junyong Zhu,Hideto Matsuyama,Shushan Yuan,Gang Zhang,Xiujing Xing,Bart Van der Bruggen
Developing a new generation of polymer membranes with switchable pores for multiple separation processes remains challenging due to the lack of materials with reversible and adjustable chemical structures . Herein, amine oxide units were introduced in the chains of poly (arylene ether sulfone) via oxidizing the tertiary amine (TA) in poly (arylene ether sulfone)/amide tertiary amine (PAES/ATA) copolymer , and then served as switches to tune the pores of the prepared membranes. The smart membranes could be reversibly tuned between loose nanofiltration mode with water permeance of 178 L m −2 h −1 bar −1 and dye (e.g., Rhodamine B) rejection of 95%, and ultrafiltration mode, with water permeance of 650 L m −2 h −1 bar −1 and dye rejection of 55%, by cyclic acid-alkali treatment. The mechanism of the switchable pore size was elucidated by dissipative particle dynamics (DPD) simulations, and the results were in good agreement with experimental results. This study provides a novel and facile route to fabricate functional membranes with reversibly tunable and highly efficient filtration performance, which could be applicable to multiple separations.
研究领域:
材料科学
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化学工程
·
膜技术
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产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2024
·
IF 10.7
Riting Huang,Furui He,Shujuan Yang,Keyang Mai,Shuntian Huang,Haifang Liu,Yuhong Feng,Gaobo Yu,Jiacheng Li
High quantum yield polysaccharide-based materials are significative for the dynamic anti-counterfeiting, while that are limited by weak fluorescence. However, natural polysaccharides with weak fluorescence are not suitable for anti-counterfeiting. Herein, alginate derivatives (SA-PBA) exhibiting aggregation-induced emission with high-quantum yields were synthesized by grafting phenylboronic acid (PBA) onto a sodium alginate (SA) chain. As the concentration increases, polymer assembly can be induced to form more compact soft colloidal aggregates, which enhances the fluorescence properties of alginate derivatives by introducing B ← N coordination bonds in the hydrophobic microregions. Interestingly, the clustered aggregates of SA-PBA can be dynamically controlled by pH, realizing the reversible adjustment of fluorescence. The corresponding mechanism is revealed by the combination of coarse-grained simulations and experiments. It is found that SA-PBA uses a hydrophobic driving force and hydrogen bond interaction to self-assemble in an aqueous solution and promote fluorescence emission. Moreover, the fluorescence quantum yield of SA-PBA can reach 14.4 % and can be reversibly altered by tuning soft colloidal microstructures. Therefore, a reversible information encryption system of SA-PBA is developed for anti-counterfeiting. This work shed some light on how to design novel anti-counterfeit materials based on natural polysaccharides and optimize the dynamic fluorescence conditions.
研究领域:
材料科学
·
化学
·
纳米技术
·
防伪技术
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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）