ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Chao Zou,Yun Huang,Ling Zhao,Wenhao Ren,Zhixing Zhao,Jiapin Liu,Xing Li,Mingshan Wang,Bingshu Guo,Yuanhua Lin
The electrode deterioration and capacity decay caused by the dissolution of transition metal ions have been criticized for a long time. The branched polyethyleneimine (PEI) was employed as a functional binder for spinel lithium manganese oxide (LiMn2O4, LMO) and layer structure lithium cobalt oxide (LiCoO2, LCO) to resolve the problem. Due to the chelation reaction of amine groups, PEI polymer binder can effectively absorb soluble transition metal ions, which is beneficial to reduce the loss of active materials. For PEI-based cathode, the uniform distribution of key components is achieved by the rapid curing process of water, which endow PEI-based cathode with a higher Li+ diffusion coefficient and improved electrochemical reaction kinetics. In addition, the fixed binder coating is favorable to protecting the active materials from parasitic reaction with the lithium hexafluorophosphate (LiPF6)-based electrolyte. Therefore, the PEI-based cell shows superior rate capability and long-term cycle performance. Functional binders of this study provide a simple and effective strategy to achieve higher capacity and longer cycle stability for transition metal oxide electrodes.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Xinyi Jin,Laizhao Guo,Yangfeng Wang,Wentao Huang,Xiang Wang
Fruits are fragile and perishable during cold chain storage and transportation, leading to large economic losses. To cope with this problem, this study designs and develops a flexible gas sensing system to monitor the respiration rate of cold-chain fruits in real time, to warn of the decay process, and to help producers optimize their marketing and logistics strategies. The system consists of three parts: sensor, hardware circuit and host computer. The sensor responds to the carbon dioxide concentration in the microenvironment and outputs an initial electrical signal, which is collected and processed by the hardware circuit and then transmitted to the host computer via Bluetooth to output the final detection result. The core component is a flexible carbon dioxide sensor, which is made of flexible polyimide (PI) substrate, copper fork-finger electrode and polyethyleneimine-carbon nanotube (PEI-CNT) sensitive layer, and is prepared by laser printing and atomized spraying technology. The performance test results show that the sensor has high response rate, high sensitivity, good stability and flexibility, and can adapt to the cold chain low temperature environment. Through the performance test of the system, the results show that the system has a high accuracy, the absolute error is not more than 9%, and has good environmental adaptability, which can realize long-term stable work. In the experimental application for cold-chain kiwifruit, the system accomplished the real-time monitoring of carbon dioxide concentration changes, which verified its practical application performance in fruit quality monitoring. The system is designed to be lightweight and portable, with no mechanical damage to fruits, real-time monitoring and early warning capabilities, providing an effective solution for cold chain fruit quality monitoring.
研究领域:
食品科学
·
传感技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry B
·
2022
·Vol. 11
·期 2
·335-344
·
IF 7.571
Yuqing Lei,Jiajia Xu,Mengqi Pan,Yadong Chen,Xiaojun Li,Weipu Zhu,Chang Shu,Tianxiang Fang,Hongbing Liao,Qiaojie Luo,Xiaodong Li
Dentin bonding is the most common form of human tissue repair among tissue-biomaterial adhesions, concerning billions of people's oral health worldwide. However, insufficient adhesive infiltration in the demineralized dentin matrix (DDM) always produces numerous defects in the bonding interface termed the hybrid layer, which causes high levels of bacteria-related secondary dental diseases, and less than 50% of the bonding lasts more than 5 years. Therefore, it is urgent and vital to construct an antibacterial low-defect hybrid layer to solve the durability-related problems. A DDM with a hydrogel-like surface formed by the hydration of highly-anionic non-collagenous proteins (NCPs) is firstly used as a template to electrostatically assemble polyethyleneimine (PEI). The formation of a stable antibacterial polyelectrolyte complex of PEI/NCPs rapidly eliminates NCP hydration capacity and significantly improves the infiltration of various adhesives. Simultaneously, both the PEI during the assembly and the PEI-assembled DDM can directly destroy a biofilm of S. Mutans on the DDM. Consequently, a long-term antibacterial and low-defect hybrid layer is successfully created, which greatly improves the bonding effectiveness. This helps to improve the clinical treatment of bacteria-based dental diseases and the tooth-restoration repair effect and prevent secondary dental diseases, having significance in clinical dentistry and providing insights for other tissue-biomaterial adhesions.
研究领域:
牙科学
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生物材料
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组织工程
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CELLULOSE
·
2017
·Vol. 25
·期 2
·1365-1375
·
IF 3.417
Ni Shuzhen,Wang Chunjian,Bian Huiyang,Yu Zhihuai,Jiao Liang,Fang Guigan,Dai Hongqi
The exploitation of light-weight paper-based cellulosic materials (PBCM) is beneficial for protecting the environment, cutting production cost and improving utilization efficiency of cellulose. In this study, a simple reaction using PEI (Polyethyleneimine) and KH560 was reported to improve the physical performance and hydrophobicity of PBCM. FTIR spectra indicated that the epoxide group of KH560 disappeared during reaction with PEI. Physical properties and hydrophobicity of the dried PBCM were determined after impregnation with the mixture of enzymatic starch and PEI-KH560. Compared with the control, the dry tensile index, wet tensile index and folding endurance of PBCM were increased by 27.1, 61.4 and 137.5%, respectively, when the dosage of PEI-KH560 was 1.35%. If starch (6.35 g/m 2 ) was added together with PEI-KH560 (1.35%), the dry tensile index could increase by 98.6%. The pH and alkaline reserve value of PBCM were also improved. The addition of PEI-KH560 improved the thermal stability of starch, thus was beneficial for the increase of thermal stability of PBCM. This novel method adopted in this study to improve the physical performance, hydrophobicity and alkaline reserve value of PBCM provided a cost-efficient and simple way to broaden its potential application fields.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry B
·
2015
·Vol. 3
·期 13
·2660-2670
·
IF 4.726
Qian Guo,Yan-Hong Liu,Miao-Miao Xun,Ji Zhang,Zheng Huang,Xue-Dong Zhou,Xiao-Qi Yu
A series of cationic polymers (P1–P5) were designed and synthesized using a ring-opening polymerization strategy based on low molecular weight polyethyleneimine (PEI) and using diglycidyl ethers as the bridging moiety. Although these polymers have reduced amino group density relative to 25 kDa PEI, their pH buffering capacity and deoxyribonucleic acid (DNA) binding ability were seldom affected. They were able to condense plasmid DNA (pDNA) well to form nanoparticles of suitable sizes (150–300 nm) and positive zeta potentials (+25–40 mV). Cell Counting Kit-8 (CCK-8) assays revealed that polyplexes formed from these polymers have lower cytotoxicity than those derived from PEI. Luciferase reporter gene delivery experiments indicated that these polymers have much better transfection efficiency than 25 kDa PEI, especially P2 and P5. Unlike PEI, serum has little negative effect on the transfection by these materials, and their transfection efficiencies were seldom reduced even with high concentrations of serum. Under optimized conditions, up to 400 times higher transfection efficiency than with PEI could be achieved. Several assays including gel electrophoresis, dynamic light scattering and transmission electron microscopy also confirmed the good serum tolerance of these polyplexes. The evenly distributed hydroxyl groups formed by the ring-opening polymerization are considered to contribute much to their high serum tolerance, and such polymerization might be a promising strategy for the design of efficient non-viral gene delivery vectors.
研究领域:
生物化学
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基因治疗
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材料科学
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING RESEARCH & DESIGN
·
2024
·
IF 3.7
Yunwu Yu,Yan Wu,Yong Yuan,Yan Wang,Changwei Xu,Yanfeng Fang,Yaxin Gu,Peng Liu,Ye Wan,Lihua Wang,Xiaowei Sun
Based on the previous study, the properties, separation efficiencies, and anti-fouling performances of TiO 2 nanoparticle embedded PEEKWC/PEI cross-linked ultrafiltration membrane made via non-solvent-induced phase separation were investigated. SEM, contact angle measurement , ATR-FTIR, and other methods were used to characterize the membranes, and then the pure water flux (PWF) and dye rejection were measured. The TiO 2 nanoparticle embedded PEEKWC/PEI cross-linked ultrafiltration membranes were prepared by stepwise solution blending method. Compared to the pristine PEEKWC/PEI cross-linked ultrafiltration membrane, the anti-fouling and pure water flux performances were enhanced as the addition of TiO2 nanoparticles. The pure water flux of TiO 2 nanoparticle embedded membranes was significantly increased and could even reach 3368.2 LMH at 5 bar much greater than that of the pristine PEEKWC/PEI ultrafiltration membrane (1423.8 LMH), remaining a retention rate for BBR higher than 98.5%. And the TiO 2 nanoparticle embedded PEEKWC/PEI cross-linked ultrafiltration membranes exhibited a certain degree of increase of FRR (higher than 80%) after UV illumination. After a series of characterisation, the dye wastewater treatment property of membranes was assessed through filtration of Coomassie brilliant blue and Congo red solutions and researches were conducted on the anti-fouling capabilities of membranes. The TiO 2 nanoparticle embedded PEEKWC/PEI cross-linked ultrafiltration membranes exhibited self-cleaning efficiency with lower irreversible fouling ratio. The pure water flux recovery ratio following dye fouling was higher after being exposed to UV irradiation, which could be attributed to the TiO 2 nanoparticles' photocatalytic destruction of organic pollutants .
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
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2019
·
IF 2.298
Fang Cao,Juan Shen
Using polyethylenimine-modified carboxylmethyl konjac glucomannan as a matrix and graphene oxide as nanofillers, a novel porous biocomposite named as PCGt was synthesized by a facile chemical cross-linking method. The structure of prepared PCGt was characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, thermal gravimetric analysis, and X-ray photoelectron spectroscopy. Batch adsorption experiments was designed to exploit key factors on Pb(II) removal such as the pH, dose, contact time, initial concentration, and temperature. According to the data from pseudo-second-order kinetic and Freundlich isotherm models, the adsorption process was controlled by chemisorption and occurred on heterogeneous surfaces. The maximum adsorption capacity of PCGt on Pb(II) was up to 977 mg g–1 at 303.15 K. In thermodynamic analysis, positive enthalpy change and negative Gibbs free energy change exposed that the adsorption was endothermic and spontaneous at 308.15 K. The recyclability of PCGt was confirmed by leaching and desorption experiments. The adsorption mechanism was proposed that the chemical complexation between Pb(II) with the functional groups on PCGt. All outcomes effectively revealed that the biocomposite PCGt was a good candidate to remove Pb(II) from aqueous solution for the waste disposal industry.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Yi Zhao,Shuzhen Ni,Ying Gao,Xin Zhang,Xingxiang Ji,Fengshan Zhang
Novel eco-friendly strength agent has inspired much attention of researchers. Herein, the PEI-KH560 prepared by PEI (polyethyleneimine) and KH560 (γ-glycidyl ether propyl trimethoxysilane) was added in the pulp suspension to enhance the paper performance. The results showed that the m(PEI):m(KH560) ratio and PEI's molecular weight were closely related with the paper strength and hydrophobicity. The SEM morphology of paper surface showed that the fiber-fiber crosslinking reached the tightest, at the optimal m(PEI):m(KH560) ratio and PEI's molecular weight. The results showed that when the M w (molecular weight) of PEI was 10,000 and the m(PEI):m(KH560) ratio was 1:2, the PEI-KH560 presented the best strengthening performance on the paper strength and hydrophobicity. Dry tensile index and wet tensile index could reach 29.9 N·m/g and 1.37 N·m/g after adding the PEI 10000 -KH560 in pulp suspension before the paper formation. Further, the effect of process conditions (temperature, time, the addition amount, and pulp concentration) on the strength and hydrophobicity of paper network structure was investigated, after adding PEI-KH560 into the pulp suspension. It was of great significance for studying the mechanism between the chemical structures of PEI-KH560 and paper performance, which provided valuable theoretical practice on the preparation of novel strength agent.
研究领域:
材料科学
·
造纸工程
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2023
·
IF 9.5
Yifan Zhang,Yaru Fan,Guoli Zhou,Yijun Cao,Jingtao Wang,Xiaobin Jiang,Ning Zhang,Shaohua Yin
With the rapid development of Li-ion batteries (LiBs), the demand for lithium sharply increased. Salt lakes contribute to major extractable lithium in the world, however, the efficient separation of Mg 2+ and Li + remains a challenge. The PEI-based nanofiltration (NF) membrane shows great potential for Mg 2+ /Li + separation in recent studies, due to its positively charged surface and tunable pore size. In this work, ethylenediamine-terminated polyethyleneimine (EDA@PEI) was utilized as the aqueous monomer reacting with trimesoyl chloride (TMC) via interfacial polymerization (IP) to fabricate a new class of PEI-based NF membranes. This work explored critical membrane fabrication parameters and characterizations of EDA@PEI NF membranes. Additionally, this work compared EDA@PEI-TMC and PEI-TMC membranes on their physicochemical properties and NF performance. The results show that PEI containing EDA groups at ends provides the probability for connection of the backbone via TMC, thus enhancing the cross-linking degree (DNC) of EDA@PEI NF membranes. Meanwhile, the presence of EDA groups enhances the Zeta potential of membranes. The best-performing EDA@PEI-TMC membrane exhibits the highest rejection for Mg 2+ of 99.21 %, and excellent Mg 2+ /Li + separation that S Li/Mg reaches 69.20, 80.62 and 46.79 at Mg 2+ /Li + mass ratios of 40:1, 60:1, and 120:1, respectively. During a 48-h NF test, EDA@PEI-TFC membrane shows consistent performance and steady flux. This work demonstrates the great application potential of EDA@PEI NF membranes for Mg 2+ /Li + separation, and provides a candidate for fabricating PEI-based NF 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
RSC Advances
·
2016
·Vol. 6
·期 99
·97187-97193
·
IF 3.289
Yali Qiao,Xingwang Zheng
Although the primary amine groups on PEI-based materials were widely used to bind fluorophores for optical sensing, the fluorescence quenching behavior of the tertiary amine groups on the same PEI macromolecules toward fluorophores was always ignored. To address these issues, in this work, we developed a new strategy that could not only avoid the limitation of the fluorescence quenching effect of the tertiary amino groups of PEI, but also keep the high reactivity of the primary amine groups. This new strategy was based on supramolecular integration of PEI into a silica matrix to form porous PEI-doped silica nanoparticles (PEI/silica nanoparticles). Our results showed that the primary amine groups of PEI inside porous PEI/silica nanoparticles possess great space freedom to maintain their high reactivity, but the tertiary amine groups of PEI were effectively masked based on the stronger supramolecular interaction between SiO− and the tertiary amino groups. Based on this finding, calcein/Co2+ fluorescence sensing systems were chosen as the model to demonstrate novel fluorescent properties of the porous PEI/silica nanoparticles. Our results showed that bright fluorescent porous calcein/PEI/silica nanoparticles (CPSNPs) could be easily prepared and further used to detect Co2+ based on the fluorescence quenching effect of Co2+ on calcein. A detection limit as low as 0.3 nM for Co2+ was achieved by these designed sensing nanomaterials.
研究领域:
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2017
·Vol. 9
·期 9
·455
·
IF 3.364
Wei Wang,Qian Bai,Tao Liang,Huiyu Bai,Xiaoya Liu
Porous regenerated cellulose (RC) membranes were prepared with cotton linter pulp as a raw material. These membranes were first oxidized on both sides by a modified (2,2,6,6-tetramethylpiperidin-1-yl)oxyl (TEMPO) oxidation system using a controlled oxidation reaction technique. Then, the oxidized RC membranes were functionalized with polyethylenimine (PEI) via the glutaraldehyde crosslinking method to obtain bifunctional (carboxyl and amino) porous RC membranes, as revealed by Fourier transform infrared spectroscopy (FT-IR), elemental analysis and zeta potential measurement. The scanning electron microscopy (SEM) and the tests of the mechanical properties and permeability characteristics of modified RC membranes demonstrated that the porous structure and certain mechanical properties could be retained. The adsorption performance of the modified membranes towards dyes was subsequently investigated. The modified membranes displayed good adsorption capacities, rapid adsorption equilibrium and removal efficiencies towards both anionic (xylenol orange (XO)) and cationic (methylene blue (MB)) dyes, making them suitable bioadsorbents for wastewater treatment.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2022
·Vol. 23
·期 18
·10743
·
IF 6.208
Teng Wang,Xi Hu,Yujun Yang,Qing Wu,Chengdian He,Xiong He,Zhenyu Wang,Xiang Mao
Metal-based enzyme mimics are considered to be acceptable agents in terms of their biomedical and biological properties; among them, iron oxides (Fe3O4) are treated as basement in fabricating heterogeneous composites through variable valency integrations. In this work, we have established a facile approach for constructing Fe3O4@Ag composite through assembling Fe3O4and Ag together via polyethyleneimine ethylenediamine (PEI) linkages. The obtained Fe3O4@PEI@Ag structure conveys several hundred nanometers (~150 nm). The absorption peak at 652 nm is utilized for confirming the peroxidase-like activity of Fe3O4@PEI@Ag structure by catalyzing 3,3′,5,5′-tetramethylbenzidine (TMB) in the presence of H2O2. The Michaelis–Menten parameters (Km) of 1.192 mM and 0.302 mM show the higher catalytic activity and strong affinity toward H2O2and TMB, respectively. The maximum velocity (Vmax) value of 1.299 × 10−7M∙s−1and 1.163 × 10−7M∙s−1confirm the efficiency of Fe3O4@PEI@Ag structure. The biocompatibility illustrates almost 100% cell viability. Being treated as one simple colorimetric sensor, it shows relative selectivity and sensitivity toward the detection of glucose based on glucose oxidase. By using indocyanine green (ICG) molecule as an additional factor, a remarkable temperature elevation is observed in Fe3O4@PEI@Ag@ICG with increments of 21.6 °C, and the absorption peak is nearby 870 nm. This implies that the multifunctional Fe3O4@PEI@Ag structure could be an alternative substrate for formatting acceptable agents in biomedicine and biotechnology with enzymatic and photothermal properties.Keywords:Fe3O4@PEI@Ag;assembling process;enzymatic;catalytic performance;photothermal property
研究领域:
生物医学
·
材料科学
·
纳米技术
✓ 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）