Desalination and Water Treatment
·
2024
·
IF 1
Fei Chai,Runkai Wang,Pinhua Rao,Wenqi Zhang,Lili Yan,Niannian Yang,Yiyun Cai,Chunyan Xi
Aiming to increase the industrial application potential of kapok fibers (KF) derived from Ceiba pentandra to deal with the anionic dyes from water, a novel biosorbent with abundant ammonium groups was synthesized via layer-by-layer self-assembly of the surface polymerization of dopa-mine (DOPA) with cross-linked polyethyleneimine (PEI) and glutaraldehyde (GA). During the self- assembly process of the biosorbent (KF-DOPA-PEI/GA), the response surface methodology based on three-level three-factorial Box–Behnken design was applied to establish the optimum modification conditions. The morphological and surface characterization was carried out with scanning electron microscope, Fourier transform infrared spectroscopy and contact angle measurement demonstrating the successful assembly on the surface of kapok fibers. The batch tests investigated a high adsorption efficiency towards methyl orange (MO) with the maximum adsorption capacity of 85.02 mg/g and the biosorbent showed excellent reusability after five cycles with the hydrochloric acid solution, indicating a potential adsorbent for anionic dyes containing wastewater treatment.
研究领域:
环境科学
·
材料科学
·
化学工程
·
纳米技术
·
水处理
✓ 已验证
DOI
高影响因子
ENERGY & FUELS
·
2026
·
IF 6
Rui Zhang,Xiaopei Huang,Shiyin Wang,Yufan Li,Lianghong Zhou,Francesco Barzagli,Chao’en Li
Hydrogen permeation is a major challenge in high-pressure gaseous hydrogen storage and transportation. In this study, a series of novel polyethylenimine-modified graphene oxide/polyethylene-vinyl alcohol (PEI-GO-EVOH) composites were prepared and coated on a nylon substrate for hydrogen barrier applications. Hydrophilic PEI was employed to modify graphene oxide, thereby promoting the uniform dispersion of PEI-GO within the EVOH matrix. Various characterization techniques were used to investigate how PEI-GO influences the morphology, thermal stability, mechanical properties, adhesion, hydrophilicity, and hydrogen barrier performance of the composite coatings. GO-EVOH composites were also prepared and characterized for comparison. Compared to pure EVOH and GO-EVOH, PEI-GO-EVOH composites exhibited enhanced thermal and mechanical stability, along with significantly improved hydrogen barrier properties. Hydrogen bonding between the components was proven to play a dominant role in these property improvements. At a PEI-GO content of 2 wt %, the hydrogen permeability of PEI-GO-EVOH coatings decreased by 48.4% and 42.9% compared to the bare nylon substrate and the GO-EVOH coating, respectively. When benchmarked against reported hydrogen barrier systems, the PEI-GO-EVOH coating achieves competitive performance with lower filler loading, confirming its potential as a suitable hydrogen barrier coating for nonmetallic pipelines and hydrogen storage containers.
✓ 已验证
DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2026
·
IF 7.1
Maoxuan Zhi,Mengxin Li,Deqing Shi,Xinliang Liu,Ming Wang,Yingfei Hou
The release of textile dyeing wastewater results in significant environmental pollution and endangers human health. Membrane separation technology offers distinct advantages in textile wastewater treatment due to its energy efficiency, high performance, and excellent separation capabilities. This study demonstrates a facile MOF-polymer hybrid membrane fabrication strategy through amine-enhanced interfacial coordination. The introduced –NH 2 groups via Noria and polyethyleneimine (PEI) co-deposition would chelate metal ions, which enhances the heterogeneous nucleation and the compatibility of metal–organic framework (MOF) and polymer. The optimized membrane exhibits superior dye sieving performance, achieving Congo red rejection of 98.9% and water permeance of 23.2 L m -2 h −1 bar −1 . Microstructural analysis reveals dense intergrown zeolitic imidazolate framework-8 (ZIF-8) architectures, validating the co-deposition approach as an effective surface engineering protocol for constructing continuous MOF-polymer hybrid membranes with defect-free interfaces. The membrane also shows superior operational stability at different pH levels and during long-term operation, which shows great potential for practical application.
✓ 已验证
DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2026
·Vol. 33
·期 4
·140
·
IF 3.5
Wang Ziyu,Wu Ranran,He Yanyang,Hu Yufang,Wang Sui,Mao Jie
Addressing the critical challenge of balancing mechanical robustness and electrical conductivity in hydrogels for wearable sensors, this study proposes a synergistic processing strategy that integrates freeze-thaw cycling, thermal annealing, and the Hofmeister effect-induced salting. A ternary composite hydrogel was prepared with polyvinyl alcohol (PVA) as the matrix, polyethyleneimine (PEI) to enhance crosslinking and biocompatibility, and carboxylated multi-walled carbon nanotubes (MWCNTs-COOH) to improve conductivity. The optimized freeze-thawing-annealing (100 °C, 20 min) and salting-out (1.5 M NaCl) process resulted in a densely cross-linked network featuring significantly enhanced crystallinity and a homogeneous, pore-free microstructure. This hierarchical structure confers upon the hydrogel outstanding mechanical properties: tensile strength of 4.15 MPa, toughness of 17.73 MJ/m 3 , elastic modulus of 2.84 MPa, and a high fatigue threshold of 117.4 J/m 2 . Simultaneously, the electrical conductivity of the hydrogel reached 0.449 S/m. The hydrogel demonstrated excellent strain/pressure sensing capabilities, featuring tunable gauge factors (GF = 0.87–2.12 within the 0-100% strain range) and pressure sensitivity (0.145 kPa -1 below 2 kPa). The practical applicability of the hydrogel was verified by reliably monitoring various human motions in real-time. This research offers a scalable and effective material design strategy for next-generation flexible electronics.
✓ 已验证
产品关联
DOI
高影响因子
Foods
·
2026
·Vol. 15
·期 15
·2701
·
IF 6
Yadi Yuan,Jingming Zhou,Hongliang Liu,Haili Wang,Yanhua Qi,Enping Liu,Yongxin Li,Aiping Wang
In recent years, food safety concerns associated with veterinary drug residues have aroused significant public attention, highlighting the critical need for continuous monitoring in both animal-derived foods and the environment to safeguard public health. Medroxyprogesterone acetate (MPA), a major anabolic steroid widely used in animal husbandry, poses potential human health risks according to recent studies. Although conventional analytical techniques based on chromatography and immunological assays are effective, they often suffer from complex operations, the need for skilled personnel, high cost, and time consumption. To overcome these limitations, electrochemical immunosensors modified with advanced nanomaterials offer a promising alternative. Herein, a highly sensitive electrochemical immunosensor was developed for trace MPA detection utilizing core–shell SiO2-PEI@Ag nanoparticles as the sensing matrix. In this nanocomposite, the structural synergy between the SiO2core and outer Ag NPs shell not only provides a high-density platform for specific antibody immobilization, but also drastically expands the electroactive surface area and accelerates electron transfer to maximize signal amplification. Benefiting from these synergistic advantages, the constructed immunosensor exhibited a limit of detection (LOD) of 0.014 ng/mL and a wide linear range of 0.03–100 ng/mL. Furthermore, the recovery rates in pork and milk samples were 91.32–97.29% and 95.14–102.54%, respectively. In addition, negligible cross-reaction was observed toward structurally related steroid hormones related to MPA and common antibiotics. The immunosensor shows good stability, reproducibility, and accuracy, demonstrating great potential as a promising candidate to complement conventional tools for future MPA residue screening.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Shuman Feng,Zezhen Zhang,Zekun Zhou,Lili Wu
This study developed a novel thin-film nanocomposite (TFN) membrane using vacuum-assisted deposition and surface chemical crosslinking by integrating MXene nanosheets with a tannic acid (TA) and polyethyleneimine (PEI) crosslinked network onto a PVDF substrate. A series of tests were conducted to characterize the chemical structure and surface morphology of the membranes, as well as to measure the concentrations of dye wastewater and saline solutions before and after filtration. The results showed that the introduction of the phenol-amine network altered the surface properties of the MXene layers, reducing the water contact angle to 49.8° and resulting in a negative zeta potential in the pH range 4–10. The optimized TFN-2 membrane achieved 100% removal of cationic dyes (methylene blue, malachite green, crystal violet), with rejection rates of 98.52%, 97.12%, and 100% for methylene blue, Congo red, and Coomassie brilliant blue G, respectively, and also exhibited certain salt ion rejection capability. Moreover, the introduction of the phenol-amine network significantly enhanced the oxidative stability of MXene. The TFN-2 membrane maintained stable flux and removal efficiency during 12 h of continuous operation and retained excellent separation performance after 90 days of storage. This study provides a new approach for developing high-performance separation 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
CELLULOSE
·
2024
·Vol. 31
·期 10
·6517-6533
·
IF 4.9
Li Qingyi,Zong Yakun,Jiang Yuanzhang,Zhang Jun,Zhao Ruifang,Chen Jianming,Shi Yidong,Tan Lin
Cotton fabrics are widely used in clothing, packaging, and medical applications because of their excellent comfort, breathability, and low cost. However, it poses a threat to use them in specific scenarios, where flame retardance and antibacterial activity are highly desired. In this work, we propose the functionalization route by using layer-by-layer assembly of polyethyleneimine (PEI), phytic acid (PA), iron (Fe 3+ ), and aluminum (Al 3+ ) ions on cotton fabrics. Interestingly, the modified cotton fabric showed good biocompatibility in the cell viability (> 70%) and hemolysis (< 3%) test. In addition to biocompatibility, the antibacterial performance was largely improved for the modified cotton fabric with the antibacterial efficacy of > 99% due to the presence of Fe 3+ and Al 3+ that work in a synergistic manner. In term of flame retardance, the modified cotton fabric exhibited self-extinguishing characteristics in vertical burning experiments, with the Limiting Oxygen Index (LOI) of 35.0%. The excellent flame-retardant property was further supported by the results in cone calorimetry test, thermal gravimetric analysis, and TG-IR test, elucidating the underlying mechanism that rapid formation of dense char layer by the thermal decomposition of PEI/PA/FeAl system is effective to prevent the spreading of flame and thus protect the cotton from burning. This work provides a strategy to achieve multifunctionality on cotton fabrics, which may inspire the design on other types of fabrics or materials for extended applications.
研究领域:
材料科学
·
纺织工程
·
生物医学工程
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Ziheng Li,Shenghan Ji,Fengting Yao,Yan Dai,Xuehua Ruan,Xiaobin Jiang,Wenji Zheng,Gaohong He
Covalent organic frameworks (COFs) are regarded as disruptive membrane materials owing to their versatile functionalities, high stability and ordered nanochannels. However, a major obstacle to the application of COF-based membranes in gas separation is the inherent size difference between their pore sizes and target gas molecules. Herein, we employed a confined cross-linking strategy to graft CO 2 -philic poly-ethyleneimine (PEI) onto carboxylic acid-type iCOF membranes, constructing a gradient wedge-shaped pore wall structure to enhance H 2 separation. High-density carboxyl group-containing iCOF nanosheets were prepared via an improved single-phase solution method and assembled into membranes. 1-ethyl-3-(3-dimethylami-nopropyl) carbodiimide/N-Hydroxysuccinimide (EDC/NHS) coupling chemistry was used to functionalize iCOF membranes with PEI. The introduction of a large number of amino groups via PEI enhances CO 2 adsorption by 81.4%. Meanwhile, the grafting of PEI reduces defects or pinholes on the membrane surface and improves the mechanical properties and stability. As a result, the PEI-functionalized iCOF@PEI-4 membrane exhibits a H 2 permeance of 1103 GPU and an H 2 /CO 2 selectivity of 21.3, positioning its performance among advanced membranes and surpassing the 2008 Robeson upper bound. Customized structural design of iCOF membranes through tailored functionalization may provide insights for designing molecularly selective COF membranes.
研究领域:
材料科学
·
膜分离技术
·
纳米材料
·
化学工程
·
功能高分子
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Henglong Tang,Mingyue Qian,Zhu Long,Dan Zhang,Chang Sun
In this study, we report the design and synthesis of a series of non-porous amorphous polyethyleneimine-based adsorbents, specifically PEI-PD, PEI-TC, and PEI-CC, for selective adsorption of anionic dyes from aqueous solutions. Utilizing pyromellitic dianhydride (PD), terephthaloyl chloride (TC), and cyanuric chloride (CC) as cross-linking agents, we produced adsorbents with distinct morphological and adsorption characteristics. Scanning electron microscopy (SEM) revealed that PEI-PD and PEI-TC exhibit rough, folded surfaces, with total pore volumes of 0.0001 cm³ /g, 0.0002 cm³ /g, respectively, whereas PEI-CC displays particulate features with total pore volumes of 0.0040 cm³ /g, confirming non-porous nature. XRD and SAED analyses confirmed the amorphous state. Zeta potential increased for the PEI based adsorbents, correlating with enhanced electrostatic adsorption. IGMH analysis revealed non-covalent interactions, including hydrogen bonding, also contribute to adsorption. Further adsorption studies indicated pseudo-second-order and Langmuir model fits, suggesting chemisorption and monolayer adsorption. The adsorption performance was evaluated using various dyes, demonstrating that cross linker structure significantly influences adsorption efficiency. PEI-TC demonstrates the highest adsorption capacity for Congo red, reaching 3089.49 mg/g, due to its para-substituted linkage enhancing molecular flexibility, while the adsorption capacity of PEI-CC was 793.85 mg/g, as the meta-substituted CC linkage causes the molecular chains stack closely together and reduces the available free space, leading to a decreased specific surface area. Under simulated real conditions, the removal rate remained above 90 %. This study offers insights into the critical role of building blocks in the development of efficient adsorbents, highlighting the importance of polymer structure on adsorption performance.
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
Journal of Materials Chemistry B
·
2025
·
IF 5.7
Tianjun Zhou,Pan Li,Yujie Sun,Wenxiang Wang,Liangjiu Bai,Hou Chen,Huawei Yang,Lixia Yang,Donglei Wei
With the miniaturization, integration and intelligence of sweat electrochemical sensor technology, hydrogel flexible sensors have demonstrated immense potential in the field of real-time and non-invasive personal health monitoring. However, it remains a challenge to integrate excellent mechanical properties, self-healing properties, and electrochemical sensing capabilities into the preparation of hydrogel-based flexible sensors. The utilization of CBPG (cellulose nanocrystals (CNCs)@bovine serum albumin (BSA)@polyethyleneimine (PEI) glucose oxidase (GOD) nanomaterial) as both an enhancing phase and sensor probe within a hydrogel matrix, with poly(vinyl alcohol) (PVA) serving as the primary network constituent, has been proposed as a non-invasive technique for monitoring trace glucose levels in sweat. In this study, BSA was initially attached to CNCs through electrostatic interactions. To further boost the surface active sites of the nanomaterial (CNCs@BSA), PEI was grafted onto the nanomaterial surface. The resulting CNC@BSA@PEI nanomaterials were then used as carriers for GOD. The prepared hydrogel exhibited good self-healing properties (87.5%) and excellent breaking strength (0.8 MPa), effectively converting glucose stimulation in human sweat into electrical output. The sensor had a detection range of 1.0 ~ 100.0 μM and a detection limit as low as 0.9 μM. Due to its ability to specifically recognize trace glucose levels in sweat, the CBPG-PVA sensor can perform highly selective, flexible, and reliable real-time monitoring of human sweat, offering significant potential for wearable biofluid monitoring in personalized health applications
研究领域:
生物材料学
·
传感技术
·
健康监测
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
·
2022
·
IF 4.52
Haishuai Peng,Yuanyuan Hui,Meixue Pu,Ding Yang,Aiqing Zhao,Weizhe Wang,Shan Wu,Bini Wang
Streptomycin (STR) residues in dairy products could cause serious health risks for human or affect the quality of the dairy products fermented by lactic acid bacteria , thereby resulting in economic losses. Thus, STR detection methods need to be developed quickly, simply, and sensitively. In this study, polyethyleneimine (PEI)-functionalized NH 2 -MIL-101(Fe) (PEI-Fe-MOF) was characterized and found to exhibit an enhanced electrochemical characteristics, when compared to Fe-MOFs. [email protected] core-shell NPs could further amplify its electrochemical signal. Based on the PEI-Fe-MOF/ [email protected] NPs nanocomposites, we have developed a novel electrochemical aptasensor to detect STR rapidly. When detected under optimal conditions, a wide linear range between 0.1 and 200 nM was observed for the aptasensor with a detection limit of 0.033 nM. Furthermore, the developed aptasensor has been satisfactorily applied for the rapid STR detection in dairy products with recoveries ranging from 98.2% to 110.1%. Therefore, our method can be considered a new effective method for the rapid detection of STR in dairy products.
研究领域:
食品科学
·
分析化学
·
生物传感技术
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Zhiguo Li,Fangbo Zhao,Hongxu Chen,Liu Yang,Jiaming Zhang
The active layer of the thin film composite (TFC) nanofiltration membrane prepared by traditional interfacial polymerization (IP) was usually a non-homogeneous state with dense in the middle and loose on both sides. Such structure would reduce the stability of membrane in operation. In this paper, a novel electrospray polymerization nanofiltration (EPNF) membrane was fabricated for efficient and long-term stable separation for Mg 2+ /Li + by multiple scan 3D electrospray printing technique. The active layer consisted of two homogeneous separation layers, the piperazine-trimesoyl chloride (PIP-TMC) inner layer and polyethyleneimine based (PEI-TMC) outer layer. With a fixed scan of inner layer, the effect of scan number of PEI-TMC outer layer on the performance of EPNF membrane was analyzed detailly from chemical structure and ion separation performance. Under the synergistic effect of electrostatic repulsion and pore size screening, the EPNF membrane achieved a Mg 2+ /Li + separation factor of 36.28 and only 1.5 % performance loss in the operation of 150 h. The electrospray polymerization process presented unique advantages in preparing TFC nanofiltration membranes with long-term separation stability.
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）