LANGMUIR
·
2014
·
IF 4.384
Feng Chen,Decheng Wan,Zhihong Chang,Hongting Pu,Ming Jin
Highly efficient and charge-selective adsorption and desorption of peptides at trace level by a solid-phase adsorbent is described. The adsorbent of SiO2@PEI is synthesized by covalent immobilization of branched polyethylenimines (PEI) exclusively on the outer surface of the porous silica particles (∼300 μm). For aqueous peptides (Mw = 600–3000 Da), SiO2@PEI can capture the negatively charged ones and leave the positively charged ones intact, and by adjusting pH of the system peptides with different isoelectric points (pIs) can be well separated. Targeted peptide at low abundance (at least as low as 0.1 mol % with respect to the highest one) can be well separated. The association constants of K > 1012 M–1 at pH > pI and K < 104 M–1 at pH < pI are found; that is, selectivity > 108 is generally available. Thus, a peptide even at sub-femtomolar level can be extracted and eluted for analysis, and efficient recovery (79–92%) of the peptides is found. The extraction is mainly promoted by multisite electrostatic interaction, and the hydrophilic and cationic properties of PEI at low pH play a unique role in desorption efficiency and selectivity. The unbiased nature of this method renders the adsorbent applicable to the efficient separation of a broad spectrum of peptides, including those with similar pIs.
研究领域:
分析化学
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生物化学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Soft Matter
·
2016
·Vol. 12
·期 20
·4549-4556
·
IF 3.798
Xuepeng Wu,Yining Wu,Shuai Yang,Mingwei Zhao,Mingwei Gao,Hao Li,Caili Dai
Imagine a novel solution that can be switched reversibly from low viscosity to high viscosity with only one additive, upon different commands. To this end, we have developed a simple and effective route to form smart, multi-response wormlike micelles based on a synthesized surfactant, N-cetyl-N,N-diisopropanolammonium bromide (CDIAB). Moreover, we provide new insight into the effects of synergy on this smart wormlike micelle. Rheological measurements were used to study the morphology of the wormlike micelles; 1H NMR spectroscopy and density functional theory (DFT) calculations were employed to investigate the molecular arrangements and mechanism of the synergy involved in the reversible reactions of pH-response and CO2-response of the micelles in solution. Based on the abovementioned results, it is encouraging to discover that binding energy and electrostatic interaction are the basic driving forces in the formation of wormlike micelles. Moreover, stable viscoelastic behavior was observed in the CDIAB system, with strong binding energy and electrostatic interactions. It is highly anticipated that the synergy observed in this surfactant will be of particular interest due to its novel mechanism and unique properties.
研究领域:
化学
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材料科学
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生物物理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
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2016
·Vol. 6
·期 48
·42693-42700
·
IF 3.289
Rui Zhang,Zhenchuan Yu,Yu Cang,Xiaoyan Hou,Zheqi Shen,Jie Deng,Zhiming Zhou,Xuhong Guo,Junwei Wang,Xuedong Zhu
Spherical polyelectrolyte brushes (SPBs), consisting of a poly(styrene) core and poly(acrylic acid) shell densely grafted from the core surface, were synthesized by photoemulsion polymerization. A novel method for highly selective separation of methylene blue (MB) and other dyes is proposed herein, which employs spherical polyelectrolyte brushes as the adsorbent and compressed CO2 as the antisolvent; neither polymer brush nor CO2 on their own can separate the dyes. The SPBs and adsorbed dyes can be precipitated simultaneously from organic solutions by the easy control of CO2 pressure. The effects of several parameters such as CO2 pressure, initial dye concentration and temperature on the removal of MB by PS-PAA have been determined. MB can be selectively adsorbed by PS-PAA from the mixed dye solution with high efficiency, indicating that the binding of MB onto PS-PAA is probably dominated by electrostatic interactions. Due to the Donnan effect of the polymer brush, the adsorbed dyes can be easily eluted by NaCl aqueous solution through ion exchange to obtain the regeneration of the polymer brush, and the recovered PS-PAA retains high adsorption capacity even being regenerated five times. This provides a simple and effective way for the separation of ionic materials, which could be applied in environmental engineering.
研究领域:
环境工程
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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
Polymers
·
2018
·Vol. 10
·期 10
·1082
·
IF 2.935
Dongmei Han,Yiqing Luo,Qing Ju,Xujing Xiao,Min Xiao,Naiyu Xiao,Shou Chen,Xiaohua Peng,Shuanjin Wang,Yuezhong Meng
Nanobrick wall hybrid coating with super oxygen barrier properties were fabricated on polyethylene terephthalate (PET) film using a quadlayer (QL) assembly of polyelectrolytes and nanoplateles. A quadlayer assembly consists of three repeat units of polyacrylic acid (PAA), poly (dimethyl diallyl ammonium chloride) (PDDA) and layered α-zirconium phosphate (α-ZrP). PDDA with positive charges can assemble alternatively with both α-ZrP and PAA with negative charges to form nanobrick wall architectures on the surface of PET film via the electrostatic interaction. The lamellar structure of α-ZrP platelets and the dense QL assembly coating can greatly reduce the oxygen transmission rate (OTR) of PET film. Compared to pristine PET film, the OTR of PET (QL)19is reduced from 57 to 0.87 cc/m2/day. Moreover, even with 19 QLs coating, PET (QL)19composite film is still with an optical transparency higher than 90% and a haze lower than 10%. Therefore, the transparent PET (QL)ncomposite films with super oxygen barrier properties show great potential application in food packaging and flexible electronic packaging.Keywords:nanobrick;electrostatic interaction;oxygen barrier;packaging applications
研究领域:
材料科学
·
食品科学与工程
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2023
·
IF 8.6
Qi Ma,Xiaoyun Liu,Jun Qian,Qixin Zhuang
Recently, the development of high-selectivity porous materials has attracted much attention due to the long-term accumulation of heavy metals in the aquatic environment. Covalent organic frameworks (COFs) show great potential as sustainable porous materials, possessing several properties that make them suitable for sewage purification and rapid adsorption. In this paper, two novel COFs containing triazine and carboxyl bifunctional groups, DAA-TFPT-COF and PDA-TFPT-COF, were developed. The DAA-TFPT-COF and PDA-TFPT-COF have high specific surface areas and good metal ion adsorption properties. Moreover, they have behaved good metal ion adsorption ability in not only acidic but also alkaline environments, which is superior to ordinary adsorption materials. The maximum adsorption amount of the DAA-TFPT-COF was up to approximately 128 mg g −1 for Pb 2+ ions. Additionally, the results of the simulation indicated that both COFs were consistent with the Langmuir adsorption model and the pseudo-second-order kinetic model, confirming the chemical adsorption process that occurs within the COFs. The strong adsorption effect in the COFs can be attributed to the electrostatic interactions between the COF and Pb 2+ ions. This also shows that the active affinity sites in the system play a crucial role in the metal ion capture process. DAA-TFPT-COF has a high partition coefficient, and exhibited fast adsorption kinetics, which makes it an excellent candidate for metal ion adsorption.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 33
·期 27
·2212570
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IF 19
Xiao Fu,Shuai Zhang,Xu Zhang,Yan Zhang,Baoxi Li,Keda Jin,Xingwei Feng,Juan Hong,Xiang Huang,Hongliang Cao,Qiaoxia Yuan,Ping Ai,Hongbo Yu,Qiang Li
Plastic-induced pollution has recently triggered global environmental, biodiversity, and public health concerns. Plastic micro/nanoparticles suspended in water that are non-recyclable and non-degradable are found in plants, animals, and even human blood, and their remediation represents an emergent societal need. In this study, a highly efficient strategy is reported to remove microplastics by using a sustainable framework derived from fungal mycelium (FM), which has reached a record capacity at 2.49 g g −1 , as it is known. This excellent removal capacity results from both the inherent properties and surface cationization of the FM. First, FM has a loose entanglement and porous structure with extracellular polymeric substances on the surface, which endows FM with the capacity to adsorb microplastics. Second, FM is engineered with 2,3-epoxypropyltrimethylammonium chloride (EPTAC) to enable its positively charged surface, which significantly enhances the adsorption of microplastics. Kinetic analysis and density functional theory reveal that the excellent microplastic removal is attributed to the enhanced electrostatic interaction between microplastics and EPTAC- g -FM. Along with the inherent merits of FM, which are natural, renewable, biodegradable, environmentally friendly, and easy to scale up, FM represents a green, facile, and cost-effective next-generation technology for remediating microplastics in clean water.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
BIOCHEMICAL ENGINEERING JOURNAL
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2021
·
IF 3.978
Yu-Ming Fang,Dong-Qiang Lin,Shan-Jing Yao
Short peptide resin has a great advantage in the separation and purification of antibodies due to its high selectivity and stable ligand binding ability. In this study, a peptide library containing 480 tetrapeptides was established with six critical residues (Phe, Tyr, Leu, Glu, Ile, Lys) of Protein A binding to Fc part of the antibody and one Histidine . Then the library was screened by LibDock and five tetrapeptide ligands with high LibDock scores were selected. Subsequently, the electrostatic interaction energies and van der Waals interaction energies between the screened ligands and the Fc-A fragment of IgG were further calculated by molecular dynamics simulation to research the binding ability between ligands and target proteins. The simulation results showed that YEHF was the optimal ligand with higher van der Waals interaction energies. Then, four tetrapeptides (YFLH, FYHI, FYKH and YEHF) were selected as ligands for preparing adsorption resins, and the resins were used to bind hIgG and BSA by static adsorption experiments. The results showed that Ac-YEHF-4FF resin had higher hIgG binding ability and lower BSA binding ability, also indicating that YEHF was the optimal screened ligand. Therefore, molecular simulation was verified as a well use technology for antibody separation and purification.
研究领域:
生物化学
·
分子生物学
✓ 已验证
DOI
高影响因子
Analytical Methods
·
2016
·Vol. 9
·期 3
·459-464
·
IF 1.915
Weiwei Bian,Sha Zhu,Mingying Qi,Lanlan Xiao,Zhen Liu,Jinhua Zhan
Pentachlorophenol (PCP) is a very high toxicity and slowly biodegraded organic pollutant. People may be exposed to PCP in environmental media through the inhalation of contaminated air, and ingestion of water and hazardous waste. Even low PCP intake will have serious effects on renal, metabolic and neurological functions, particularly in terms of carcinogenicity. Here, an electrostatic interaction driven solid phase microextraction (SPME) combined with surface enhanced Raman spectroscopy (SERS) was proposed for rapid detection of PCP in environmental water. The nanoporous Ag coating was in-situ electrochemically synthesized and modified by cysteamine to form a positive stationary phase on a fiber surface. The PCP was extracted using the DI-SPME mode and its SERS spectra were investigated; the characteristic bands at 338 cm−1, 378 cm−1 and 480 cm−1 were identified as the fingerprint peaks. The extraction procedure was optimized, and the adsorption mechanism was also discussed by the electric double layer model. The good stability and uniformity of the substrate provide a high enhancement factor of 3.7 × 105 and low LOD of 6.4 × 10−9 M for quantitative determination. This work provides a versatile strategy for rapid on-site detection of ionic or polar organic pollutants in environmental media.
研究领域:
环境科学
·
分析化学
✓ 已验证
DOI
高影响因子
Materials Chemistry Frontiers
·
2017
·Vol. 2
·期 2
·362-368
·
IF 0
Chong Hu,Tao Ye,Yujing Liu,Jie Ren,Xinyi Jin,Hongzheng Chen,Hanying Li
Incorporation of guest materials into semiconducting single crystalline hosts leads to the formation of semiconducting single-crystal composites. However, limited efforts have been made to comprehensively investigate the property of these potential functionalized single-crystal composites. Herein, PbI2/gel single-crystal composites have been successfully prepared. Diffuse reflectance spectra show a clear increase in the band gap of PbI2 after gel incorporation. The band gap is further increased through expanding the area of host/guest interfaces or enhancing the interatomic forces at the interfaces. The interatomic forces (electrostatic interaction) at the host/guest interfaces are attributed to this band gap shift. As such, this study provides a novel and facile way for band gap engineering by gel incorporation.
研究领域:
材料科学
·
半导体物理
✓ 已验证
DOI
MACROMOLECULAR CHEMISTRY AND PHYSICS
·
2025
·
IF 2.7
Ping Zhang,Xiaoxun Xu,Zilong Cao,Po Hu,Yebin Guan,Xie Wang,Junwei Wang,Shengjue Deng,Jiajun Fu
Waterborne polyurethanes (WPUs) attract significant attention for their versatility across various fields, yet optimizing both high strength and toughness remains a challenge. This study successfully develops an ultra-tough bio-based WPUs by regulating non-covalent interactions (hydrogen bonds and electrostatic interactions) and precise cross-linking. The WPUs are synthesized using 2,2-dimethylolpropionic acid (DMPA), castor oil (CO), poly(tetramethylene ether glycol) (PTMG), isophorone diisocyanate (IPDI), and ethylenediamine (EDA) as raw materials, constructing a network structure rich in hydrogen bonds and electrostatic interactions. The resulting material exhibits outstanding mechanical properties, including high tensile strength (15.91 MPa), Young's modulus (98.36 MPa), and toughness (107.65 MJ m −3 ), while also demonstrating good repairability, processability, and excellent shape memory capabilities. These well-designed non-covalent interactions provide an effective strategy for designing bio-based WPUs with superior comprehensive performance.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
IONICS
·
2025
·
IF 2.6
Cao Lin-An,Li Xiao-Qin,Li Yi-Qian,Huo Yun-Fei,Chen Lu
Paraquat (PQ) is a highly toxic herbicide but widely used in agricultural production. Highly sensitive detection of trace PQ is vital and challenging. Herein, two-dimensional electronically conductive metal–organic framework (2D EC-MOF) Ni 3 (HHTP) 2 (HHTP: 2,3,6,7,10,11-hexahydroxytriphenylene) is in situ constructed on the carbon paper and employed as an electrochemical sensor for PQ detection for the first time. The Ni 3 (HHTP) 2 electrochemical sensor exhibits a high detection sensitivity (175 μA·μM −1 ·cm −2 ), low detection limit (4.4 nM), good reproducibility, and strong anti-interference ability. In addition, the sensor shows reliable performance in the detection of PQ in real samples including apples, cucumbers, tomatoes, and pears (detection recovery is 95.4–104.4%). Furthermore, zeta potential test (a method which can obtain zeta potential value on the particle surface) and density functional theory (DFT) calculation confirm that the strong electrostatic interactions between active sites and PQ are conducive to the high-sensitivity detection of PQ. The accession of 2D EC-MOF to PQ electrochemical sensor provides new ideas for sensor design and broadens the scope of EC-MOF’s applications. Graphical abstract
研究领域:
分析化学
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材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Yuhan Yang,Fu Zhao,Zhao Zhang,Yanan Liu,Zongmei Li,Xiaocui Wei,Tingyuan Wang,Chunyang Fan,Zhongyi Jiang
The surface segregation method, as an in-situ surface modification method, has been increasingly used to construct heterogeneous membrane surfaces with hydrophilic microdomains and low surface energy microdomains. Herein, we constructed a heterogeneous antifouling membrane surface using electrostatic interaction enhanced surface segregation method with negatively charged perfluorosulfonic acid (PFSA) as surface segregation agents in casting solution and positively charged polyethyleneimine (PEI) as crosslinker in coagulation bath. The electrostatic interaction between PFSA and PEI enhanced the driving force of surface segregation, intensifying surface segregation of PFSA and residence stability of PFSA and PEI to construct low surface energy microdomains and hydrophilic microdomains, respectively. The resulting membrane exhibited super-oleophobicity and super-low oil adhesion underwater. Meanwhile, the addition of PFSA facilitated the phase inversion to enhance membrane permeability. Accordingly, our membrane exhibited water permeation flux of 367 L m −2 h −1 with a water flux recovery ratio of more than 95 % when separating various surfactant-stabilized oil-in-water emulsions. Moreover, after three-cycle filtration experiment, the water flux recovery ratio maintained above 90 %. Our study may provide a facile method to construct heterogeneous antifouling membrane through controlling surface segregation process using commercially available chemicals
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）