INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2019
·
IF 3.375
Xia Wan,Xiaojuan Lu,Jie Liu,Yuanfeng Pan,Huining Xiao
CO2 emission has caused serious environmental problems, and the reduction of CO2 has become a global issue. The use of amine-impregnated solid adsorbents for CO2 capture from flue gas has been an effective approach. Herein, a novel porous MgCO3 was synthesized by a facile and template-free method and further impregnated with polyethylenimine (PEI) to prepare porous adsorbent for highly efficient CO2 capture. Moreover, during the synthesis of MgCO3, CO2 was used as one of the reactants in an attempt to improve the potential utilization of CO2. The effects of PEI loading, temperature, and coexisting gases (H2O, NO, and SO2) on CO2 adsorption performance were identified in a fixed bed. The results indicated that the adsorption capacity of the adsorbent toward CO2 was increased significantly after PEI impregnation. With the increase of temperature, the capture capacity of CO2 decreased because of the dominated thermodynamic control on the low PEI-loaded adsorbents, however, increased due to the governed kinetic control on the high PEI-loaded adsorbents. In addition, the adsorbent loaded with 20 wt % PEI showed the highest CO2 capture capacity, up to 1.07 mmol/g at 75 °C, and exhibited a 19.6% increase by introducing 10 vol % of water vapor. Meanwhile, the CO2 capture capacity was almost unaffected by NO; however, SO2 in flue gas could have some negative effects on CO2 adsorption due to the stronger acidity. Finally, the cyclic adsorption/desorption tests demonstrated excellent regenerability and stability of adsorbent. The results indicated that the PEI-modified porous MgCO3 is a very promising adsorbent for CO2 capture.
研究领域:
环境科学
·
化学工程
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DOI
高影响因子
CELLULOSE
·
2022
·Vol. 29
·期 18
·9953-9967
·
IF 6.123
Wan Jiansheng,Li Hong,Cai Xiaoyu,Yan Jun,Liao Yongping
In this study, functional coatings with N-halamine structure were formed on cotton fabrics by dopamine (DA) auto-deposition and DA/Polyethyleneimine (PEI) covalent co-deposition, respectively. SEM、UV-Vis and XPS had confirmed the deposition of DA and DA/ polydopamine (PDA) on the cotton fabrics. When the mass ratio of DA/PEI was 1:1.5, a uniform functional coating was formed. XRD had indicated that the coating and the oxidative sodium hypochlorite solution did not affect the crystal structure of cellulose. The DA/PEI co-deposited modified cotton fabric had excellent antibacterial property after chlorination, and the inactivation rate against E coli and S aureus could reach 100% with a contact time of 30 min. In vitro cell cytocompatibility studies demonstrated that the DA/PEI co-deposited modified cotton fabric has good biocompatibility. The functional coating on the cotton fabric remained stable after 50 washing cycles. The UPF values and the wrinkle recovery angle (WRA) tests showed that the DA/PEI co-deposited coating imparted great durable press and UV protective properties to the cotton fabric. The breaking strength loss rate of the modified cotton fabrics after chlorination was about 20%, which had little effect on the wearing property. Graphic abstract
研究领域:
材料科学
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纺织工程
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生物医学工程
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DOI
高影响因子
Journal of Physical Chemistry C
·
2023
·
IF 3.7
Shuai Wang,Liuyuan Zhu,Rujie Yang,Minliang Li,Fangfang Dai,Shiqi Sheng,Liang Chen,Shanshan Liang
Lithium extraction from brine or seawater using membrane technology has attracted extensive attention in recent years. Graphene oxide (GO), as one of the two-dimensional materials, has been proven as a competitive candidate for membranes. However, the GO membranes still suffer challenges for ion sieving due to the swelling in the aqueous solution. In this work, a GO–PEI membrane with positively charged channels was constructed by polyelectrolyte polyethyleneimine (PEI) molecular chain-grafted GO nanosheets. The GO–PEI membrane showed a high selectivity of 22.2 for Li+/Mg2+, together with a competitive Li+ permeation rate of 0.09 mol m–2 h–1 in a binary permeation test. In addition, the membrane showed excellent stability during the separation process. The enhanced Li+/Mg2+ separation performance of the GO–PEI membrane could be mainly attributed to the synergistic effect of size sieving and electrostatic repulsion. We further systematically studied the influence of various variables, such as PEI molecular weight, PEI content, membrane thickness, and ion concentration, on separation performance. This work deepens the understanding of membrane ion selectivity from multiple perspectives and puts forward a strategy to design a two-dimensional membrane structure from microscopic materials.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
Polymers
·
2018
·Vol. 10
·期 10
·1060
·
IF 2.935
Miao-Miao Xun,Zheng Huang,Ya-Ping Xiao,Yan-Hong Liu,Ji Zhang,Ju-Hui Zhang,Xiao-Qi Yu
Rapid enzymatic degradation and fragmentation during DNA administration can result in limited gene expression, and consequently, poor efficacy. It is necessary to use novel vectors for DNA delivery. Herein, we aimed to design useful carriers for enhancing transfection efficiency (TE). These lipopolymers were prepared through Michael addition reactions from low-molecular-weight (LMW) polyethyleneimine (PEI) and linkers with three kinds of steroids. Agarose gel electrophoresis assay results displayed that the three lipopolymers could condense plasmid DNA well, and the formed polyplexes had appropriate sizes around 200–300 nm, and zeta potentials of about +25–40 mV. The results of in vitro experiments using HeLa, HEK293, and MCF-7 cells showed that these lipopolymers present higher TE than 25-kDa PEI, both in the absence and presence of 10% serum. Flow cytometry and confocal microscopy studies also demonstrated that these lipopolymer/DNA complexes present higher cellular uptake and intracellular distribution. The measurement of critical micelle concentration (CMC) revealed that these lipopolymers could form micelles, which are suited for drug delivery. All results suggest that the three materials may serve as hopeful candidates for gene and drug delivery in future in vivo applications.Keywords:gene vectors;Michael addition;lipopolymers;steroids
研究领域:
生物化学
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分子生物学
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药学
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DOI
PubMed
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2023
·
IF 4.6
Yiqing Xue,Yubo Wang,Yanhua Wang,Wenyan Liang,Fangxin Wang,Dongyu Zhu,Huanyu Zhao
Ice accumulation often threatens the safety of human life and property. How to effectively solve the problem of solid surface icing has been the research work of many researchers. However, how to prepare superhydrophobic and anti-icing film with multi-strategy collaborative deicing is still facing great challenges. In this paper, a design strategy of photothermal and electrothermal superhydrophobic nanocomposite film based on polyetherimide (PEI) was proposed. Multi-walled carbon nanotubes (MWCNT) were dispersed in PEI matrix by solution blending method, and a lotus leaf like rectangular micropillar array was constructed on the surface of the film by laser etching technology. Then, the surface was fluorinated to further reduce the surface energy. Finally, a kind of MWCNT/PEI nanocomposite film with passive anti-icing and active deicing with photothermal and electrothermal collaboration was successfully prepared. The freezing time of droplets on MWCNT/PEI nanocomposite film is about 6.7 times longer than that of pure PEI film. This film exhibits excellent superhydrophobicity (CA = 156.6°), while also having excellent photothermal and electrothermal conversion properties. In addition, we also conducted various tests on MWCNT/PEI nanocomposite film to verify its reliability in the actual application environment. The MWCNT/PEI nanocomposite film with the function of anti-icing and photothermal and electrothermal active deicing is expected to solve the problem of solid surface icing in daily life, and also provides a new idea for the development of a new generation of anti-icing/deicing film.
研究领域:
材料科学
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表面工程
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DOI
高影响因子
Materials Today Communications
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2023
·
IF 3.8
Zhaohua Yang,Yuanyuan Liu,Kaicheng Xue,Ping Fu,Feipeng Du,Yunfei Zhang
Solar water evaporation technology based on photothermal materials is regarded as one of green and critical technologies for addressing freshwater scarcity. However, practical application of photothermal materials is limited by their high preparation cost, low evaporation efficiency, and poor photothermal conversion. In this study, a facile sponge with excellent photothermal and mechanical properties has been fabricated by mechanical-mixing and chemical-crosslinking of polyethyleneimine modified graphene oxide nanosheets (PEI-GOs), formaldehyde, polyvinyl alcohol (PVA) and sulfuric acid catalyst. The as-prepared PEI-GOs/PVA sponge shows excellent light absorption (95.1 %) under standard sunlight intensity of 1.0 sun (1 kW m −2 ) and a wide wavelength range of 200–2500 nm. The achieved high evaporation rate (1.80 kg m −2 h −1 ) is 4.7 times those of pure water (0.38 kg m −2 h −1 ). Moreover, the simulated seawater desalination experiment shows that the sponge has a good long-term stability and an average photothermal conversion efficiency of 88.5 %. The water purified by the sponge exceeds the quality of urban daily water. Therefore, this study offers a new facile route for fabricating a kind of photothermal sponge with good light absorption capacity, and water evaporation properties, which has potential application in seawater desalination.
研究领域:
材料科学
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环境科学
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能源科学
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2025
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IF 2.8
Lu Wang,Hong Li,Yue Dai,Erzhu Sun
Dopamine (DA) can self-polymerize to form polydopamine (PDA) under weak alkaline conditions in the presence of oxygen, creating vibrant structures at the gas–liquid interface. However, the issue of the polydopamine film cracking and easily peeling off from the fabric surface remains unresolved. In this article, we report the rapid polymerization of dopamine in a CuSO 4 /H 2 O 2 system, resulting in the preparation of polydopamine-structured colored cotton fabrics through the stepwise addition of 3-aminopropyltriethoxysilane (KH550) and polyethyleneimine (PEI). Structured color cotton fabrics were hydrophobically treated by a simple impregnation technique using the hydrophobic agent cetyltrimethoxysilane (HDTMS). This improvement suggests that the covalent bonding of PEI with PDA, along with its assembly on the fabric surface, enhanced the homogeneity and continuity of the structural color film, resulting in a brighter and more uniform fabric surface color. After HDTMS treatment, the structural color film on PDA/KH550/PEI-Cotton was converted from a hydrophilic to a hydrophobic state, with a static water contact angle averaging approximately 152.375°. The hydrophobic treatment provided the structural color fabrics with good film stability and resistance to washing, while their surface coloration remained largely unaffected. This method provides a new research idea for eco-dyeing of cotton fabrics.
研究领域:
材料科学
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纺织功能材料
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表面化学
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纳米结构色
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绿色染整技术
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DOI
高影响因子
ANALYTICAL CHEMISTRY
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2022
·
IF 8.008
Zhixiao Si,Hongquan Xu,Meihua Lin,You Jiang,Qiujiao Du,Haotian Ma,Huageng Liang,Pengcheng Gao,Fan Xia
Surface charge effects in nanoconfines is one of the fundamentals in the ion current rectification (ICR) of nanofluidics, which provides entropic driving force by asymmetric surface charges and causes ion enrichment/depletion by the electrostatic interaction of fixed surface charges. However, the surface charge effect causes a significant electrostatic repulsion in nanoconfines, restricting additional like charge or elaborate chemistry on the highly charged confined surface, which limits ICR manipulation. Here, we use polydopamine (PDA), a nearly universal adhesive, that adheres to the highly positive-charged poly(ethyleneimine) (PEI) gel network in a nanochannel array. PDA enhances the ICR effect from a low rectification ratio of 9.5 to 92.6 by increasing the surface charge and hydrophobicity of the PEI gel network and, meanwhile, shrinking its gap spacing. Theoretical and experimental results demonstrate the determinants of the fixed surface charge in the enrichment/depletion region on ICR properties, which is adjustable by PDA-induced change in a nanoconfined environment. Chemically active PDA brings Au nanoparticles by chloroauric reduction for further hydrophobization and the modification of negative-charged DNA complexes in nanochannels, whereby ICR effects can be manipulated in versatile means. The results describe an adjustable and versatile strategy for adjusting the ICR behaviors of nanofluidics by manipulating local surface charge effects using PDA.
研究领域:
材料科学
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生物物理学
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纳米技术
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DOI
PubMed
高影响因子
ACS Applied Polymer Materials
·
2023
·
IF 5
Yutao Xu,Fatima Zahra Chafi,Peng Chen,Cancan Peng,Ya-Jun Cheng,Kunkun Guo,Xiuxia Zuo,Yonggao Xia
Nickel-rich layered cathodes (for example, NCM811) hold great promise for practical applications in high-energy density lithium-ion battery technology. However, a nickel-rich cathode has poor cyclic stability because of the structure degradation induced by repeated cycles and excessive formation of thick cathode–electrolyte interface (CEI) layers. Poly(vinylidene difluoride) (PVDF) is a typical binder used to form a positive electrode, which nevertheless lacks the functionality to suppress structure degradation and control CEI layer formation. A new concept is proposed in this work to use a multi-functional block copolymer of poly(ether imide)-block-poly(dimethyl siloxane) (PEI-b-PDMS; abbreviated as PEMS) as the binder for the nickel-rich cathode. Unlike the conventional PVDF binder, the PEMS binder is capable of inhibiting crack formation within the NCM811 particles to retard structure degradation over cycles because of its elastomeric feature. The PEMS binder also enables tuning the composition of the CEI layer and inhibits the formation of overly thick CEI layers because the carbonate solvent molecules are excluded from the solvation sheath by the PEMS binder. Enhanced electrolyte affinity is exhibited by the electrode with the PEMS binder as evidenced by the contact angle measurement. Improved carbon black dispersion within the electrode is achieved by the PEMS binder because the PEI aromatic chain has strong affinity toward the carbon black particles. Both the cycling and rate performance of the NCM811 cathode is improved with the PEMS binder compared to the PVDF binder. In detail, the capacity retention is increased from 63.9 to 80.6% after 200 cycles at 0.5 C (1 C = 205 mAh g–1) when the PVDF binder is replaced by the PEMS binder. The rate performance at current densities of 2 and 5 C is increased significantly due to enhanced electrochemical kinetics.
研究领域:
材料科学
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电化学
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DOI
高影响因子
MICROCHIMICA ACTA
·
2021
·Vol. 188
·期 2
·1-9
·
IF 5.833
Senosy Ibrahim Abdelhai,Zhang Xin-Zhong,Lu Zhi-Heng,Guan Xiao-Yu,Yang Zhong-Hua,Li Jian-Hong,Guo Hao-Ming,Abdelrahman Talat Mahmoud,Mmby Mohamed,Gbiliy Asmaa
Fe 3 O 4 @MIL-100 (Fe)/PEI are used for the first time as an adsorbent material for the extraction of pesticide residues (epoxiconazole, flusilazole, tebuconazole, and triadimefon) from food matrices. The adsorbent proposed (Fe 3 O 4 @MIL-100(Fe)/PEI) was characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), transmission electron microscopy (TEM), field emission scanning electron microscopy (FE-SEM), thermogravimetric (TG) analysis, and vibrating sample magnetometer (VSM) techniques to evaluate the properties of the sorbent. Then, the Fe 3 O 4 @MIL-100 (Fe)/PEI was employed for the quantification of the four triazole fungicides in fruits and vegetables (apple, orange, tomato, cabbage, and cucumber) using HPLC-UV for separation and detection. During the extraction process, the main parameters such as amount of adsorbent, extraction time, pH value, ionic strength, eluting solvent, and eluting volume were optimized. Under the optimum conditions, good linearity of this method was observed for all analytes, with correlation coefficients ( R 2 ) ≥ 0.9908. The limits of detection (LODs) ranged from 0.021–3.04 μg kg −1 . The extraction recoveries of the four triazole fungicides varied from 73.9 to 109.4% with relative standard deviations (RSD) in the range 0.5 to 6.2%. Compared with other MOFs, the modification of Fe 3 O 4 @MIL-100 (Fe) with PEI shows high efficient adsorption due to the combined benefits of MIL-100 (Fe) and PEI. The material is easily synthesized, has good stability, and is of low cost.
Graphical abstract
研究领域:
分析化学
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食品安全
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环境科学
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Kailu Wang,Jie Wen,Suiwang Zhang,Lingzhi Yang,Huan Yang,Xiaorong Yu,Hui Zhang
The polyacrylamide-based gel used for oilfield conformance control exhibits poor temperature and salt resistance. This paper proposes the use of inorganic-organic core-shell materials as chemical crosslinkers for the polyacrylamide-polyethyleneimine (PAM-PEI) gel system to regulate and design its gel structure, enabling it to withstand harsh reservoir conditions. To achieve this, Fe 3 O 4 @PEI nanoparticles were prepared using a facile one-pot method and employed as chemical crosslinkers for the PAM-PEI gel. Herein, the Fe 3 O 4 "core" provides strong stability derived from the inorganic material, and the PEI "shell" reacts with the PAM molecular chain in a transamidation reaction, so that the Fe 3 O 4 @PEI nanoparticles are riveted inside the gel by chemical crosslinking, which greatly enhances the gel structure. The Fe 3 O 4 @PEI nanoparticles exhibit a nearly spherical shape with an average diameter of approximately 75.6 nm and demonstrate excellent dispersion in water, possessing a zeta potential of 40.8 mV. In comparison to the control PAM-PEI gel, the PAM-PEI-Fe 3 O 4 @PEI gel exhibited significantly enhanced gel strength, rheological properties, long-term thermal stability, and anti-salt properties. It demonstrated a tan(δ) value of 0.12, indicative of its behavior as a nearly robust gel. Even after 360 days of placement at 90 °C in a 20 g/L NaCl solution, the gel maintained its Sydansk code at code I . Moreover, NaCl was observed to act as a retarder for this gel, while its Sydansk strength remained unaffected. In addition, the PAM-PEI-Fe 3 O 4 @PEI gel is magnetically responsive, so it can be utilized with a magnet generator to enhance its plugging performance and control its directional movement. By monitoring the magnetization rate of the gel in the reservoir, high permeability layers can be accurately identified, thus providing important practical applications in reservoir management.
研究领域:
材料科学
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石油工程
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化学工程
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2015
·Vol. 132
·期 32
·
IF 1.768
Zhengyan Tan,Hong Peng,Hongfang Liu,Linling Wang,Jing Chen,Xiaohua Lu
A novel magnetic adsorbent (EDTA /chitosan/ PMMS) was facilely prepared by reacting chitosan with EDTA anhydride in presence of PEI - coated magnetic microspheres. The as-synthesized EDTA/ chitosan /PMMS was characterized by XRD, SEM, TGA, FT-IR , and VSM, and then employed in removal of heavy metals of Pb(II) from aqueous solution. The results of the batch adsorption experiments revealed that the adsorbents had extremely high uptake capacities for Pb(II) in the pH range of 2 to 5.5, and the adsorption kinetics for EDTA/ chitosan /PMMS was consistent with the pseudo – second - order kinetic model. Moreover, its equilibrium data were fitted with the Langmuir isothermal model well, which indicated that the adsorption mechanism was a homogeneous monolayer chemisorptions process. The maximum adsorption capacity of EDTA/ chitosan /PMMS for Pb(II) was found to be 210 mg g − 1 at pH 4 (30 ° C), and further reuse experiments results suggested that EDTA /chitosan/ PMMS could be a potential recyclable magnetic adsorbent in the practical wastewater treatment. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 42384.
研究领域:
环境科学
·
材料科学
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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）