CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Kaifeng Chen,Tongle Bao,Hua Yang,Yabo Dong,Yajing Di,Xudong Wang,Zhongjin Wang,Wei Yang,Shaoxing Qu,Zongrong Wang
The non-destructive, real-time, and automatic monitoring for the development of cracks in ancient architectures is crucial to the preservation of precious ancient heritages. Here, light-weight crack sensing constructed with ultra-thin and high-performance flexible pressure sensors is proposed to fulfill this demand. The signal drift and poor reversibility commonly observed in widely-reported sensors based on elastomer matrix, which originates from the creep and relaxation behaviors, are addressed using piezoresistive polypyrrole-grafted polyetherimide fibers. The corresponding flexible piezoresistive sensors exhibit great sensitivity (9.45 kPa −1 in 0 ∼ 1 kPa and 3.48 kPa −1 in 3 ∼ 10 kPa), outstanding static stability (5.13 % signal drift after 48 h under 1 kPa), dynamic durability (4.72 % degradation after ∼30,000 cycles) and excellent robustness across an ultra-wide temperature range of −70 ∼ 150 ℃. Based on this highly reliable pressure sensor, the proposed non-destructive crack sensors integrated into an Internet of Things (IoT) platform display outstanding stability during their service in the Forbidden City. By virtue of the low energy consumption, one lithium battery can power the monitoring system for more than one year.
研究领域:
材料科学
·
结构健康监测
·
文化遗产保护
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传感技术
·
物联网
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DOI
高影响因子
RSC Advances
·
2025
·Vol. 15
·期 42
·35068-35076
·
IF 4.6
Xu Han,Haozhen Li,Ling Niu
This study introduces a novel electrochemical aptasensor designed for the sensitive detection of lactate in athlete sweat. The sensor is based on a PEI-rGO-modified SPCE coupled with AuPt NPs, and utilizes Na+-assisted DNAzyme for signal amplification. The PEI-rGO modification enhances the aptasensor's conductivity, while the AuPt NPs efficiently load MB and LDNA, generating stable electrochemical signals. Furthermore, the Na+-dependent DNAzyme leverages the Na+ naturally present in sweat to activate the cleavage process, amplifying the detection signal. The sensor exhibits a strong linear relationship between current response and lactate concentration in the range of 5 × 10−3 to 10 mM, with a limit of detection (LOD) of 2.974 μM. It demonstrates excellent specificity, stability, and repeatability. The optimized aptasensor offers significant potential for real-time, non-invasive lactate monitoring, particularly in athletic performance and health assessment. This work provides a promising approach for the development of reliable, portable biosensors for tracking lactate metabolism, with implications for sports science and health management.
研究领域:
生物医学工程
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运动生理学
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电分析化学
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纳米生物技术
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即时检测
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Hang Xu,Lili Jiang,Yan Hu,Jitao Lin,Chao Zhou,Zhijun Zhong,Xiaomin Li,Chuanqiang Yin,Changxin Tang,Lang Zhou
Polyimide (PI) has emerged as a promising material for constructing efficient gas separation membranes due to its excellent stability and gas separation properties. Herein, we report a novel composite membrane structure that utilizes the synergistic effect to achieve efficient H 2 /CO 2 separation by skillfully integrating the advantages of three different functional layers. The support layer consists of a PI fiber membrane loaded with zeolitic imidazolate framework-67 (ZIF-67) using an in-situ growth method, which not only enhances the overall mechanical strength of the membrane, but also provides complex gas transport pathways to improve selectivity. The intermediate layer is made of polydimethylsiloxane (PDMS), which prevents excessive penetration of the selective layer solution into the support layer. The selective layer is a mixed matrix membrane composed of polyetherimide (PEI) as the polymer matrix and zeolitic imidazolate framework-67 (ZIF-67) as the porous filler, which provides critical molecular sieving functionality. Compared to pure polyetherimide (PEI) film, the composite membranes have significantly improved mechanical and gas transport properties, with H 2 permeability of 83.4 Barrer and H 2 /CO 2 selectivity of 5.4. Additionally, the composite membranes exhibit excellent hydrophobicity and thermal stability. Given their outstanding overall performance, the composite membranes developed in this study demonstrate significant potential for CO 2 capture and H 2 recovery applications.
研究领域:
材料科学
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化学工程
·
膜技术
·
气体分离
·
纳米技术
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Shiwei Tian,Yaqi Zhang,Qiankun Sha,Yixuan Wang,Xingxiang Zhang,Xuhuan Yan,Na Han
Polyphenylene sulfide (PPS) membrane materials have attracted significant attention for separating oily wastewater due to their remarkable separation precision and permeation capability. Nevertheless, the inherent hydrophobic characteristics result in a single wetting property, which restricts their broad applicability in treating diverse types of oily wastewater. In this study, the PPS/TA-PEI/CaAlg/ZIF-8 composite membranes exhibit outstanding under-liquid dual superlyophobicity, which were formed via constructing a composite coating containing polyphenol-polycation and calcium alginate (CaAlg) hydrogel, and assembling ZIF-8 nanocrystals with suitable surface chemistry. Through the solvent pre-wetting approach, the surface wettability of the PPS composite membranes can be flexibly transitioned between under-water superoleophobicity and under-oil superhydrophobicity, thus realizing on-demand separation of oily wastewater. It is noteworthy that the treatment efficiency of the PPS/TA-PEI/CaAlg/ZIF-8 composite membranes for the various oil-water mixtures (surfactant-free) and emulsions (stabilized by surfactants) attained greater than 98.1%. Meanwhile, the rapid transport capability of diverse types of oil-water emulsions can also be exhibited, with a permeance of 1652.4 L m -2 h -1 bar -1 for water-in-oil (W/O) emulsions and 2087.5 L m -2 h -1 bar -1 for oil-in-water (O/W) emulsions. In addition, the PPS composite membranes demonstrated outstanding anti-fouling capacity, recyclability, and switchable separation capacity. This work extended the utilization of the PPS membrane material in the controllable treatment of oily wastewater.
研究领域:
材料科学
·
环境工程
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产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2024
·
IF 5.7
Jingyu Lin,Xiaohan Wu,Yifan Xia,Lingzhi Nie,Peiyuan Zuo,Puke Mi,Qixin Zhuang
Polyetherimide (PEI) has great potential as a dielectric because of its high-temperature resistance, but its low energy storage density limits practical applications. Incorporating hafnium dioxide (HfO 2 ) with a moderate dielectric constant ( k ) and wide bandgap can simultaneously enhance the polarization intensity of PEI and potential barriers for charge injection . Nevertheless, the poor compatibility between HfO 2 and PEI inevitably introduces defects, thereby weakening the inhibitory effect on dielectric loss . To tackle this issue, an organic double interface layer is introduced to enhance dielectric performance, where the polar poly(arylene ether urea) (PEEU) containing hydrogen bonds can ensure the layer's compactness. Notably, its non-bonding urea groups serve as deep traps to capture migrating carriers, and the gradient k values of HfO 2 , PEEU, and PEI help mitigate electric field distortions at the interface, therefore enhancing the suppression of conduction loss . The polarity of PEEU and the introduction of multiple interfaces significantly contribute to an increased k (maximum 9.7, at 1 kHz). At 300 kV mm −1 , 5 vol% PEEU@HfO 2 /PEI achieves a discharged energy density of 3.3 J cm −3 and a high charge-discharge efficiency of 83 %, surpassing 5 vol% HfO 2 /PEI by 1.95 and 2.44 times, respectively. The further COMSOL simulation verifies and proves this work as a novel design strategy for nanocomposite dielectrics.
研究领域:
材料科学
·
电气工程
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产品关联
DOI
高影响因子
TALANTA
·
2025
·
IF 6.1
Jinming Zhang,Jihang Zhang,Jiale Chen,Xiao Zhang,Jinglan Wu,Pengpeng Yang,Fengxia Zou,Hanjie Ying,Wei Zhuang
Enzyme immobilization techniques are crucial for enhancing enzyme stability and catalytic efficiency. Traditional methods such as physical adsorption and simple covalent binding often fail to maintain enzyme activity and stability. In this study, an innovative multi-level immobilization strategy was proposed to achieve efficient targeted immobilization of nuclease P1 (NP1) by fine-tuning the surface microenvironment. Molecular simulation results revealed that the distinctive electrostatic distribution and the specific placement of basic amino acids, such as lysine, on the NP1 surface caused dopamine to preferentially adsorb on areas away from NP1’s active site. This selective adsorption facilitated the directed immobilization of NP1, while the positively charged environment generated by the co-deposited surface further enhanced NP1’s adsorption capacity. This multilevel modification was found to significantly optimize the physicochemical environment of the immobilized surface through surface characterization and enzymatic testing. This strategy greatly improves enzyme activity (3590.0 U/mg), stability, and reusability (70 % after 10 cycles). In particular, NP1 on this surface exhibited an optimal Michaelis constant (K m ) of 34.0 mM and a maximum reaction rate of 5.5 mM min −1 , demonstrating the remarkable effect of the modification strategy in enhancing the enzyme catalytic performance. The present study provides an efficient and stable immobilization platform for enzyme catalytic applications by precisely modulating the surface microenvironment and the oriented immobilization strategy, which has an important potential for practical applications. This stable and reusable NP1 platform allows for efficient DNA/RNA cleavage, facilitating its application in industrial biocatalysis, biomedical enzyme-based processes, and biosensors.
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yuhang Lin,Shengjie Li,Lei Du,Wenhao Dong,Xilei Chen,Qingyao Gao,Ben Wang
It is an intractable challenge that the hierarchical MXene-based nanohybrid fillers are intended to modify the inherent flammability and easily breeding bacteria property of ABS polymeric materials, thereby facilitating wide applicability of ABS composites. Here, an interface engineering strategy was proposed, wherein polyethyleneimine (PEI)-modified silver nanocubes (AgNCs) was firmly assembled on MXenes via electrostatic interaction to construct 0D–2D hierarchical MXene-based nanohybrids (MXene@PEI@AgNC). The MXene was protected and the interface compatibility between MXene-based nanohybrid and ABS matrix was enhanced. Results revealed that the unique hierarchical structure of the composite promoted enhanced dispersion of MXene@PEI@AgNC in the ABS matrix. Combustion tests showed that 1.0 wt%MXene@PEI@AgNC provided the ABS with effective fire safety. Moreover, ABS-1.0 wt%MXene@PEI@AgNC exhibited a 31.88 % decrease in peak heat release rate, a 39.60 % decrease in peak smoke release rate, a 41.50 % decrease in peak CO 2 production rate, and a 50.04 % reduction in the smoke factor. Meanwhile, 1.0 wt%MXene@PEI@AgNC improved the tensile strength of ABS-1.0 %MXene@PEI@AgNC (+18.1 %) without reducing the elongation at break. They also enhanced the antibacterial properties of ABS-1.0 %MXene@PEI@AgNC. This study proposed a novel and feasible approach to address the interfacial stability of MXene and to construct MXene-based hierarchical nanoblends, thereby facilitating the wide practical applications of polymeric nanomaterials in industry.
研究领域:
材料科学
·
高分子化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
DESALINATION
·
2024
·
IF 8.3
Wubin Wang,Jin Wang,Yufei Yan
With the development of industry, the scarcity of lithium resources is becoming increasingly prominent. Therefore, the development of high-performance nanofiltration (NF) membranes for lithium extraction from salt lakes has become crucial. Herein, β-Cyclodextrin (β-CD) and amino-rich graphitic carbon nitride (g-C 3 N 5 ) sol were uniformly mixed to form β-CD@g-C 3 N 5 , which was then mixed with polyetherimide (PEI) monomer and subjected to interfacial polymerization (IP) reaction with trimesoyl chloride (TMC) on a 0.22 μm microfiltration (MF) membrane to prepare the PEI-(β-CD@g-C 3 N 5 )/TMC composite NF membrane. Through thin plate theory and gradient operation pressure filtration tests, it was found that the composite NF membrane prepared on the MF membrane substrate was not only defect-free but also exhibited superior compression resistance. In Li + /Mg 2+ filtration tests, the PEI-(β-CD@g-C 3 N 5 )/TMC membrane showed superior NF performance, with a Li + /Mg 2+ selectivity coefficient of 38.85 and a permeability of 8.91 L·m −2 ·h −1 ·bar −1 . This was attributed to the effect of β-CD@g-C 3 N 5 , which could thin the separation layer, slightly enlarge and more uniformly distribute the pores, increase hydrophilicity, and enhance positive charge; meanwhile, the cavity structure provided by β-CD helped to effectively separate Li + /Mg 2+ . Furthermore, under conditions of mixed salt solutions with different Mg 2+ /Li + mass ratios and 80 h of continuous filtration, the membrane exhibited excellent stability. This work introduces innovative membrane materials and design concepts to the field of lithium extraction via NF, potentially paving the way for the industrial application of NF technology.
研究领域:
材料科学
·
环境工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Acta Biomaterialia
·
2018
·
IF 6.383
Dongni Wu,Yongnu Zhang,Xiaoting Xu,Ting Guo,Deming Xie,Rong Zhu,Shengfeng Chen,Seeram Ramakrishna,Liumin He
In this study, we prepared a multifunctional gene delivery nanovector containing a chitosan (CS) backbone and polyethylenimine (PEI) arms with arginine-glycine-aspartate (RGD)/twin-arginine translocation (TAT) conjugated via polyethylene glycol (PEG). Branched PEI, with a molecular weight of 2000 Da, was used to achieve a balance between biocompatibility and transfection efficiency, whereas RGD/TAT peptides were conjugated for enhanced targeting ability and cellular uptake. Synthesis of the copolymers was confirmed by characterizing the chemical structure with 1 H nuclear magnetic resonance and Fourier Transform Infrared Spectroscopy (FTIR). The nanovector was biocompatible with cells and showed excellent capability for DNA condensation ; the resulting complexes with DNA were well-formed, and possessed small particle size and reasonable positive charge. Higher gene transfection efficiency, compared to that achieved with PEI (25 kDa), was confirmed in tumor (HeLa cells) and normal cells (293T and NIH 3T3 cells). More importantly, the cells transfected with the chitosan- graft -PEI-PEG/pCMV-EGFP-Ntf3 complex produced sustained neurotrophin-3 with a linear increase in cumulative concentration, which induced neuronal differentiation of neural stem cell and promoted neurite outgrowth . These findings suggested that our multifunctional copolymers might be ideal nanovectors for engineering cells via gene transfection, and could potentially be applied in tumor therapy and regenerative medicine. Statement of Significance We successfully prepared a multifunctional gene delivery nanovector containing branched PEI with a molecular weight of 2000 Da to balance between biocompatibility and transfection efficiency, and RGD/TAT peptides for enhanced targeting ability and cellular uptake. The well-formed CPPP/DNA complexes of small particle size and reasonable positive charges potentially enhanced gene transfection in both tumor and normal cells. More importantly, the CPPP/pCMV-EGFP-Ntf3 complex-transfected 293T cells could produce sustained NT-3 with a constant ratio, which induced neuron differentiation of NSC and promoted neurite outgrowth. Therefore, our study provided an effective strategy for producing neurotrophins by engineering cells with gene delivery, which deserved wide investigation and potential application in regenerative medicine.
研究领域:
生物材料学
·
神经科学
·
再生医学
✓ 已验证
DOI
PubMed
高影响因子
Journal of Materials Chemistry B
·
2017
·Vol. 5
·期 7
·1408-1422
·
IF 4.543
Haixia Wang,Qian Li,Jing Yang,Jintang Guo,Xiangkui Ren,Yakai Feng,Wencheng Zhang
If plasmid complexes prepared from targeting carriers have endothelial cell selectivity and high transfection efficiency, they can specifically enhance rapid endothelialization by delivering the corresponding gene plasmids. A high content of functional groups in the carriers benefits high selectivity efficiency. Herein, we have synthesized a comb-shaped polymer bearing several Arg-Glu-Asp-Val (REDV) peptides and poly(ethylene glycol) as a pEGFP-ZNF580 gene carrier with cell-type recognition of human endothelial cells. An amphiphilic block copolymer of poly(2-hydroxyethyl methacrylate)-block-poly(ε-caprolactone)-graft-poly(ethylene glycol)-graft-poly(ethyleneimine) conjugated with REDV peptide (PHEMA-b-PCL-g-PEG-g-PEI-REDV) is synthesized, and nanoparticles of it are prepared by polymer self-assembly. This polycationic PHEMA-b-PCL-g-PEG-g-PEI-REDV carrier effectively condenses pEGFP-ZNF580 plasmid to form REDV-targeted complexes and protects pEGFP-ZNF580 integrity from enzymatic hydrolysis. These REDV-targeted complexes exhibit low cytotoxicity but high transfection efficiency to EA.hy926 cells compared with non-targeted complexes (PHEMA-b-PCL-g-PEG-g-PEI/pEGFP-ZNF580) as demonstrated by MTT assay, fluorescence-activated cell sorting analysis and fluorescence analysis. Furthermore, the relative protein level of endothelial cells transfected by REDV-targeted complexes is higher than that by non-targeted complexes. Therefore, REDV-bearing carriers may have potential as effective and targeting transfer carriers for pEGFP-ZNF580 plasmid, and their complexes can be used in the endothelialization of artificial vascular grafts.
研究领域:
生物材料
·
纳米技术
·
基因治疗
·
细胞生物学
✓ 已验证
DOI
PubMed
高影响因子
Separations
·
2026
·Vol. 13
·期 4
·120
·
IF 3.5
Mengmeng Jia,Mengchen Shi,Yi Wang,Xiaofeng Fang
The efficient removal of dyes and separation from dissolved salts are crucial for the recovery of valuable resources from saline textile wastewater. In this study, hollow fiber membranes were fabricated using the non-solvent-induced phase separation (NIPS) method and then improved with a dual-coating process to create effective nanofiltration (NF) membranes. First, hollow fiber substrates with Fe3+were fabricated using NIPS. Subsequently, the inner surface of the membrane was coated with phytic acid (PA) and polyethyleneimine (PEI), which increased the thickness of the separation layer and reduced the size of the surface pores, thereby improving the separation efficiency. The loose NF membrane exhibited superior water permeance (pure water permeability of 280 L·m−2·h−1·bar−1) and, with dye rejection rates consistently exceeding 95%, also remarkable dye/salt selectivity (with separation factors of CR/NaCl: 64.08, CR/Na2SO4: 21.21, CBB/NaCl: 14.75, and CBB/Na2SO4: 10.74). The flux recovery of the membrane was over 80% for humic acid, and the membrane exhibited favorable stability under acidic and alkaline conditions, confirming its excellent antifouling and stability performance. In conclusion, this study presents a straightforward and effective approach for fabricating hollow fiber loose NF membranes, underscoring their potential for treating hypersaline wastewater and resource recovery.
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DOI
高影响因子
DESALINATION
·
2023
·
IF 9.9
Shao-Lu Li,Yaxu Guan,Yiwen Qin,Youcai Chen,Dandan Cheng,Genghao Gong,Yunxia Hu
In this study, a novel antifouling loose nanofiltration (LNF) membrane was prepared by the cross-linking and grafting of hydrolyzed polyacrylonitrile ultrafiltration (HPAN UF) substrate with a polyethylenimine (PEI) based zwitterionic polymer PEI-CA through the covalent amide bond. The successful introduction of PEI-CA was verified by various techniques. The tailored membrane HPAN-PEICA exhibited ultra-high water permeance (73.5 L m −2 h −1 bar −1 ) and meanwhile maintained excellent rejection (~99.9 %) for dye Brilliant Blue R (BBR), Methyl Blue (MB), Congo red (CR) and Chrome Black T (CBT). In addition, it exhibited ultralow rejection (below ~6 %) towards the inorganic salts (NaCl, Na 2 SO 4 , MgCl 2 and MgSO 4 ), with excellent dye/salt selectivity of ~65. The as-fabricated membrane HPAN-PEICA was proved having good long-term operation stability and pressure resistance properties. Dynamic fouling experiments confirmed that the membrane HPAN-PEICA presented excellent antifouling performance towards four typical model foulants (LYZ, SA , HA and BSA). Over all, we believed that the tailored LNF membrane HPAN-PEICA having great application prospects in textile effluent treatment.
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）