RSC Advances
·
2014
·Vol. 4
·期 50
·26309-26315
·
IF 3.708
Zheng-Yong Chen,Ya-Yuan He,Hong-Wen Gao
A “dissolving and rebuilding” method was applied to prepare a diatomiteethyleneimine–polymer (PEI) hybrid composite, and its structure and topography were characterized by XRD, SEM, TEM, FTIR, DTG, elemental analysis and ζ-potential. The results indicated that the PEI was efficiently assembled into the SiO2 framework formed from diatomite. Attempts were made to use the composite to remove phenolic pollutants, e.g. phenol, o-chlorophenol and bisphenol A (BPA), from aqueous solution. These adsorptions were to be in accordance with lipid–water-partition law, and their Kaw values were calculated to be 79.1 L kg−1 for phenol, 37.3 L kg−1 for o-chlorophenol and 24.2 L kg−1 for BPA.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
Coatings
·
2023
·Vol. 13
·期 11
·1845
·
IF 3.4
Zhimin Cao,Mingyi Zhu,Xuxu Dong,De Liu,Pan Cao
An innovative antifouling composite coating comprising dopamine (DA), polyethyleneimine (PEI), and silica (SiO2) was developed through a straightforward and environmentally friendly approach. Initially, silica nanoparticles comodified with DA and PEI were meticulously deposited onto 304 stainless steel surfaces pretreated with dopamine to achieve a uniformly distributed nanocomposite surface. Comprehensive analytical techniques, including Fourier transform infrared spectrometry (FTIR), X-ray photoelectron spectrometry (XPS), field emission scanning electron microscopy (SEM), contact angle measurement (CA), and 3D optical profilometry, were employed to affirm the successful preparation of the silica nanocomposite coatings and the effective grafting of MAG II. The antibacterial and antibiofilm performance of the DA/PEI/SiO2-modified surface was rigorously assessed usingVibrio natriegens(V. natriegens), yielding compelling results indicating a substantial 51.4% reduction in biofilm formation on the SS-DA/PEI/SiO2sample surfaces, coupled with an impressive 95.2% decrease inV. natriegensadhesion. This pioneering research introduces an innovative strategy for the development of antimicrobial surfaces with promising applications in medical devices, aquaculture, and related fields.Keywords:surface modification;DA/PEI/SiO2nanocoating;antimicrobial performance;stability properties
研究领域:
材料科学
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生物医学工程
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表面化学
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Kexin Tao,Yuning Zhang,Yu Song,Zhiyuan Chen,Yao Wang,Yanxin Wang,Jianguo Tang,Linjun Huang
Water pollution has long been a significant issue, and the purification of dye wastewater plays a crucial role in addressing this problem. Graphene oxide (GO) has found extensive applications in water treatment due to its unique two-dimensional (2D) structure and a surface rich in a large number of oxygen-containing functional groups. We introduced silica(SiO 2 ) and polyethyleneimine(PEI) into GO to prepare a membrane. The experimental findings revealed that the 3-SiO 2 /GO binary composite membrane achieved a high water permeability of 45.6 L m −2 h −1 bar −1 while maintaining retention, which is nearly four times higher than that of the GO membrane (9.85 L m −2 h −1 bar −1 ).The water permeability of the PEI 0.2 -SiO 2 /GO ternary composite membrane achieved 42.37 L m −2 h −1 bar −1 . The rejection rate for methyl orange dye reached 92.36 %, with similar rejection rates all above 95 % observed for other dyes.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
Journal of Coatings Technology and Research
·
2023
·Vol. 20
·期 3
·979-994
·
IF 2.3
Liu De,Wang Huming,Dong Xuxu,Liu Xiaodan,Dosta Sergi,Zhang Chao,Cao Pan
Marine fouling can cause a series of hazards in the marine industrial field, and the traditional antifouling methods do not fulfill the green antifouling requirement. Herein, a novel DA/PEI/SiO 2 /antibacterial peptide antifouling coating was prepared by a multi-modification approach. Initially, the nanocoatings were prepared by depositing DA, PEI, and SiO 2 on the dopamine (DA)-modified 304 stainless steel (SS) surface, and finally, the DA/PEI/SiO 2 /AMPs composite coatings were prepared by grafting antimicrobial peptides (AMPs). The surfaces of SS before and after modification were characterized by Fourier transform infrared spectrometer (FTIR), X-ray photoelectron spectrometer (XPS), field emission scanning electron microscopy (SEM), contact angle measurement, and 3D optical profilometer. SSN-1 cells were used to evaluate the cytocompatibility of the modified surface. The results revealed that the cells cultured on the modified surface still maintained a good adhesion morphology, demonstrating the superior cytocompatibility of the composite coating. The anti-biofilm and antimicrobial properties of the modified samples were evaluated using Vibrio natriegens . The antibacterial efficiency of SS-DA/PEI/SiO 2 surfaces before and after AMPs modification reached 78.39 and 95.90%, and anti-biofilm efficiency of AMPs modified surface achieved 72.87% corresponding to 44.19% of SS-DA/PEI/SiO 2 . The successful grafting of AMPs improved the antibacterial and anti-biofilm properties of the modified sample surfaces. Electrochemical and stability tests indicated that the modified sample surfaces exhibited excellent corrosion resistance and antifouling stability properties. This research could provide a novel green anti-fouling and anti-corrosion strategy for the marine industry and other related fields.
研究领域:
材料科学
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表面工程
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生物医学工程
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海洋技术
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Yanghui Liu,Jian Zhou,Zhangbin Ji,Fengling Zhuo,Shengyu Wen,Yiqin Chen,YongQing Fu,Huigao Duan
Humidity sensing and water molecule monitoring have become hot research topics attributed to their potential applications in monitoring breathing/physiological conditions of humans, air conditioning in greenhouses, and soil moisture in agriculture. However, there is a huge challenge for highly sensitive and precision humidity detection with wireless and fast responsive capabilities. In this work, a hybrid/synergistic strategy was proposed using a LiNbO3/SiO2/SiC heterostructure to generate shear-horizontal (SH) surface acoustic waves (SAWs) and using a nanocomposite of polyethylenimine-silicon dioxide nanoparticles (PEI-SiO2 NPs) to form a sensitive layer, thus achieving an ultrahigh sensitivity of SAW humidity sensors. Ultrahigh frequencies (1∼15 GHz) of SAW devices were obtained on a high-velocity heterostructure of LiNbO3/SiO2/SiC. Among the multimodal wave modes, we selected SH waves for humidity sensing and achieved a high mass-sensitivity of 5383 MHz · mm2 · μg–1. With the PEI-SiO2 NP composite as the sensitive layer, an ultrahigh sensitivity of 2.02 MHz/% RH was obtained, which is two orders of magnitude higher than those of the conventional SAW humidity sensors (∼202.5 MHz frequency) within a humidity range of 20–80% RH.
研究领域:
传感器技术
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材料科学
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电子工程
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DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
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2025
·
IF 5.1
Zheng Chang,Qiqi Zhao
In this paper, using a strong coordination of the multi-amino groups of polyethylenimine (PEI)/SiO 2 nanoparticles with Cu 2+ and the weaker carboxyl-amine interactions with heme chloride (hemin), novel Cu 2+ -hemin dual-functionalized PEI/SiO 2 nanoparticles (abbreviated as Cu 2+ /hemin/PEI/SiO 2 NPs) were conveniently synthesized. The Cu 2+ /hemin/PEI/SiO 2 NPs exhibit both the peroxidase-like activity of hemin and the electrochemical signaling properties of Cu 2+ . Moreover, a large number of hemin molecules were successfully loaded onto Cu 2+ /PEI/SiO 2 NPs through electrostatic interactions. This not only prevented their self-aggregation-induced inactivation in aqueous solutions, but also catalytically amplified the electrooxidation signal of Cu 2+ /PEI/SiO 2 NPs by shortening the electron transfer distance. Subsequently, these nanoparticles spontaneously assembled on the overoxidized polypyrrole-modified reduced graphene oxide (abbreviated as OPPy/rGO) electrode surface through Cu N coordination between OPPy and Cu 2+ , and π-π stacking interactions between hemin and rGO. As a novel immunosensing platform, a label-free electrochemical immunosensor for carbohydrate antigen-125 (CA125), a specific biomarker for epithelial ovarian cancer was developed by covalently immobilizing CA125 capture antibodies onto the Cu 2+ /hemin/PEI/SiO 2 NPs@OPPy/rGO hybrid nanomaterials. Elevated serum CA125 levels correlate significantly with ovarian cancer progression. With the increasing concentration of CA125 antigen, the current responses of this immunosensor were decreased due to the formation of antigen-antibody insulating immune complexes. The proposed immunosensor exhibited excellent performances within a wide linear range from 5 × 10 −5 to 200 U·mL −1 for CA125 and a low detection limit of 1.2 × 10 −5 U·mL −1 (S/N = 3). Additionally, this immunosensor demonstrated good stability, reproducibility, and selectivity, making it a promising tool in clinical screening, early diagnosis, and prognostic monitoring of ovarian cancer.
研究领域:
分析化学
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生物传感器
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纳米技术
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生物电化学
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癌症诊断
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材料科学
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 44
·19091-19102
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IF 3.288
Faguang Ma,Yan Yan,Zhixin Yu,Yilin Wu,Xinlin Liu
The development of molecularly imprinted membranes (MIMs) has promoted applications of membrane-based separation technology, which has shown considerable advantages in water treatment, chemical separation and drug purification. Herein, imitated core–shell PEI@SiO2-based enoxacin-imprinted nanocomposite membranes (SPEIMs) were developed by mixing polyethylenimene-modified silica nanoparticles with polyvinylidene fluoride powder under freezing operation. As a typical and hazardous water pollutant, enoxacin was selected as the template molecule. Morphology and chemical characterizations were explored for an insightful analysis of the obtained membranes. Based on the organic–inorganic hybrid strategy, the as-prepared SPEIMs exhibited superior selectivity towards the target (enoxacin). Satisfactory adsorption performance (55.94 mg g−1), permeability (3.22 for norfloxacin/enoxacin and 7.07 for ciprofloxacin/enoxacin) and regeneration performance (90.31%) were achieved onto SPEIMs. The products and methods obtained in this work would potentially enrich the applications of MIMs in pollution control and biochemical separation.
研究领域:
环境科学
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材料科学
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水处理技术
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DOI
高影响因子
APPLIED CLAY SCIENCE
·
2022
·
IF 5.907
Xiaohua Tian,Sujun Tian,Lulu Wang,Yanping Yang,Ruilong Zhang,Jiangdong Dai,Jianming Pan
The easy preparation of robust superwetting materials for oily wastewater disposal still remains a challenge. Inspired by the self-cleaning and mechanical properties of natural nacre underwater, herein, we have successfully developed sphere-rod quaternary artificial nacre-inspired meshes (named GO-PEI-SiO 2 -Hal) via interfacial self-assembly using 2D graphene oxide nanosheets , hyperbranched polyethyleneimine, SiO 2 nanospheres , and hollow halloysite nanotubes (Hal) as the building blocks. The nacre-like “brick-and-mortar” layered microstructure was successfully formed and tightly coated to the mesh, showing excellent mechanical properties with Young's modulus up to 19.7 ± 2.6 GPa. Compared to the ternary structures, the quaternary sphere-rod morphology improved the surface roughness , and these four organic/inorganic building blocks are all hydrophilic , which together resulted in the superhydrophilic and underwater superoleophobic characteristics. The effects of building block concentration, dipping number, and mesh size on wettability and oil-water separation performance were studied in detail. The optimal (GO-PEI-SiO 2 -Hal-1) 15 @Fe 300 mesh showed an underwater oil contact angle of 159 o for 1,2-dichloroethane, low oil adhesion, and excellent separation efficiency up to 99.8% at an ultrahigh flux up to 195,038 L m −2 h −1 . This nacre-like mesh exhibited excellent salt tolerance, acid-alkali resistance, recycling ability, and mechanical properties for practical oily wastewater treatment .
研究领域:
材料科学
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环境工程
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DOI
高影响因子
Results in Engineering
·
2024
·
IF 6
Ziteng Feng,Tong Wang,Yakai Lin,Lin Wang,Yuanhui Tang,Huanhuan Wu,Hedi Chen,Lixin Yu,Xiaolin Wang
Polyvinylidene fluoride (PVDF) membranes, widely used for their stability, face limitations due to the hardly adjustable pore size in nanoscale and inherent hydrophobicity. To address this, we proposed a co-deposition method incorporating dopamine (DA), polyethyleneimine (PEI), and silicon dioxide (SiO 2 ) nanoparticles with glutaraldehyde cross-linking for precise regulation of pore size and hydrophilicity in PVDF hollow fiber membranes. Notably, the pore diameter reduced from 119.0 ± 3.55 nm to 18.4 ± 0.36 nm, while the contact angle decreased from 107.7° to 40.9°. This simultaneous regulation led to a high-performance PDA/PEI/SiO 2 -PVDF hydrophilic ultrafiltration membrane with a rejection rate exceeding 99% for 20 nm nanoparticles in a long-term simulated separation experiment while achieving a significant protein permeability of 97% in BSA permeation experiments. Additionally, the membrane demonstrated exceptional long-term stability, offering a novel approach for tuning the performance of ultrafiltration/microfiltration membranes.
研究领域:
材料科学
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环境工程
·
生物医学工程
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产品关联
DOI
高影响因子
Analytical Methods
·
2025
·
IF 2.6
Zheng Chang,Zhenyuan Duan,Junpeng Li,Xiangze Meng
In this study, hemin-functionalized polyethyleneimine/silica nanoparticles (hemin/PEI/SiO2 NPs) served as an electrochemical label for ultrasensitive detection of prostate-specific antigen (PSA), a clinically important prostate cancer biomarker. A poly(thionine)/carbon nanotube (PTh/CNTs) multilayer film was fabricated on a glassy carbon electrode (GCE) via integrated electropolymerization and electrostatic layer-by-layer (LbL) assembly, forming a {PTh/CNTs}2/PTh modified GCE with abundant amino groups. PSA capture antibodies (Ab1) were then covalently immobilized on the modified electrode through glutaraldehyde (GA) crosslinking, leveraging the film's surface-exposed amino groups. Furthermore, hemin/PEI/SiO2 NPs were synthesized through amine-carboxyl interactions between carboxyl groups of hemin and amine groups of PEI/SiO2 NPs. The immunosensor assembly employed a sandwich-type electrochemical platform using PSA detection antibody (Ab2)-conjugated hemin/PEI/SiO2 NPs. The specific antibody-antigen binding enables efficient electron transfer across the nanoscale spacing (several nanometers) between hemin/PEI/SiO2 NPs and the {PTh/CNTs}2/PTh multilayer film. In this architecture, CNTs serve as excellent electron mediators, significantly facilitating electron transport. Moreover, the high-density immobilization of hemin on PEI/SiO2 NPs significantly amplifies the electrochemical redox currents of the multilayer film through proximity effects. This enhanced electrical signal enables highly sensitive detection of target protein antigen–antibody binding events. Consequently, by correlating the enhanced reduction peak current of the immunosensor with PSA concentration, highly sensitive detection of PSA at various concentrations can be achieved. Under optimized conditions, it exhibited a linear response to logarithmic PSA concentrations (0.01 pg mL−1 to 100 pg mL−1, R = 0.9963), with an ultralow detection limit of 3.0 fg mL−1 (S/N = 3). Furthermore, the immunosensor demonstrated outstanding analytical performance in human serum samples (96.0–103% recovery, n = 3), confirming its high accuracy for clinical applications.
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PubMed
高影响因子
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