COLLOID AND POLYMER SCIENCE
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2022
·Vol. 300
·期 9
·1017-1025
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IF 2.434
Li Jiawei,Shao Xiaoming,Zhang Bo,Wang Zongzheng,Ye Xin,Zhang Liqun,Wang Wencai
We report a simple strategy for improving the hydrophilicity of carbon black. Tannic acid (TA) and diethlyenetriamine (DETA) were employed to co-deposit on the surface of CB via immersing the CB in an alkaline TA and DETA solution with gently stirring at room temperature. The surface chemistry characteristics and hydrophilic of CB are investigated. The results suggest that a poly (tannic acid/diethlyenetriamine) (TA/DETA) layer with abundant hydrophilic groups such as hydroxyl and amino groups was successfully deposited on the surface of CB. Results of static contact angle indicate that the water contact angle is as low as 32°, which presents the excellent hydrophilicity of the modified CB. Graphical abstract The deposition process of TA and DETA on the surface of carbon black.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
Journal of Water Process Engineering
·
2022
·
IF 7.34
Wen Huang,Xueping Zhang,Yaxin Tang,Jinqi Luo,Jiao Chen,Yixin Lu,Lin Wang,Ze Luo,Jianqiang Zhang
In this study, waste corn cobs were oxidized and grafted with diethylenetriamine (DETA), which chelates a large amount of Fe 3+ . Then, nitrogen-doped zero-valent iron/biochar (ZVI/BC-N) was prepared using a simple carbothermal reduction method. ZVI/BC-N had a larger specific surface area and porous structure due to the irregular folding phenomenon on its surface caused by Fe and N codoping. At the same time, ZVI/BC-N contained more ZVI reactive crystals due to DETA chelation. The pseudo-second-order and Elovich models better describe the behavior of ZVI/BC and ZVI/BC-N in phosphorus adsorption, where the adsorption process was controlled by a combination of the reaction rate and diffusion. The isotherm and thermodynamic fitting results showed that the adsorption of phosphorus by ZVI/BC was a single-molecular-layer physical adsorption process, while ZVI/BC-N exhibited multimolecular layer chemisorption , and the maximum amounts of phosphorus adsorbed by ZVI/BC and ZVI/BC-N were 17.93 and 82.78 mg·g −1 , respectively. X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared (FTIR) spectroscopy showed that both C N and C H on biochar were involved in the adsorption process, while the coordination between OH, C O and phosphate, the adsorption of ZVI and chemical processes were the main mechanisms of phosphorus removal. The stronger adsorption performance of ZVI/BC-N compared to ZVI/BC might be related to its high ZVI content and rich surface structure. This study aims to provide a method for the preparation of biochar composites with a high ZVI content through simple modifications and provide a new approach for the efficient removal of phosphorus from water.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 15
·e55222
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IF 2.7
Haihua Wang,Yun Han,Xuan Liu,Liyu Sun,Huizhu Niu,Yifan Du,Jie Wang
In lithium-ion batteries (LIBs), separator is used to provide a barrier between the anode and cathode and provide freedom for the transport of lithium-ions, which serves a key function in inhibiting internal short circuit and improving the battery safety. The limited wettability of commercial polyolefin separators in electrolytes restricts its utilization in extreme environmental conditions. In our work, we choose polypropylene (PP) as the precursor and can address the issue of poor wettability through suitable modification methods. Tannic acid (TA) and diethylenetriamine (DETA) were utilized to coat PP separator via hierarchical self-assembly approach, and the coating is further stabilized by taking advantage of the specific oxidizing properties of sodium periodate. This method scarcely increases the separator thickness or sacrifices the microporous structure of the original separator. The improved separator not only exhibits outstanding wetting capability and relatively high ion conductivity (1.24 mS cm −1 ), but also has the highest lithium-ion migration number of 0.74. This indicates that when the modified separator is applied to LIBs, its electrochemical performance is significantly enhanced. The enhancement in electrochemical performance of LIBs is attributed to the strong absorption and retention ability of the coating on the separator. The reversible capacity of Li/PP-TD2 separator/LiFePO 4 battery is 144.3 mAh g −1 at 2C, which is higher than that of PP separator (117.1 mAh g −1 ) under the same current density. Even after 200 cycles, the PP-TD2 separator with two-layer assembly modification still maintains a higher coulombic efficiency of 97.55% and a discharge capacity of 96.6%. This hierarchical self-assembly modification of PP provides an effective approach for fabricating high-performance separator.
研究领域:
材料科学
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电化学
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能源技术
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2015
·
IF 2.711
Xi Zhang,Peng-Fei Ren,Hao-Cheng Yang,Ling-Shu Wan,Zhi-Kang Xu
We report a novel approach toward the surface modification of commercial polymer membranes via co-deposition of tannic acid (TA) and diethlyenetriamine (DETA). Particle-free, superhydrophilic, and almost colorless coatings are fabricated on the surfaces of polypropylene, poly(vinylidene fluoride), and poly(tetrafluoroethlene) microfiltration membranes. Cross-linking between TA and DETA plays a crucial role during the co-deposition process, as well as the adhesion of TA on the hydrophobic membrane surfaces. Both the surface wettability and water permeation flux are dramatically improved for the studied membranes after the co-deposition. The results indicate that co-deposition of TA and DETA is great potential for the surface modification of hydrophobic membranes.
研究领域:
材料科学
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表面化学
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产品关联
DOI
高影响因子
RSC Advances
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2016
·Vol. 6
·期 54
·48810-48815
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IF 3.289
Ge Yang,Jianxi Zhao
A reverse aggregate system composed of oleic acid and diethylenetriamine in cyclohexane has been studied. Small angle X-ray scattering (SAXS) measurements and polarising microscopy (POM) observations suggested the formation of reverse vesicles. FT-IR measurements showed simple attraction between DETA and OA, which increased the size of the head of the forming unit and resulted in reverse vesicle formation. Therefore, the viscosity of solutions depended on the mole ratios of DETA to OA,β, and reached a maximum of 122 Pa s at β = 1 for 1 mol L−1 OA. Dynamic oscillatory sweeps were carried out for this system of equi-mole mixed OA (1 mol L−1) and DETA. Strong elasticity was observed, where the elastic modulus (G′) always dominated over the viscous modulus (G′′) over the range of examined frequencies. The elastic plateau modulus G′P was 127.4 Pa and G′P was found to decrease exponentially with temperature. Strain sweeps exhibited a strain-softening response at high strains. The effect of trace amounts of water was also examined for equi-mole mixed OA (1 mol L−1) and DETA, where the reverse vesicles remained. The water was found to improve the association of DETA with OA and increase the visco-elasticity of the solution. The maximum viscosity was as high as 6005 Pa s at W0 = 6, and G′P also reached 530 Pa. The solution became gelatinous in appearance.
研究领域:
化学
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材料科学
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DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2019
·
IF 2.298
Daofan Ma,Chunying Zhu,Taotao Fu,Xigang Yuan,Youguang Ma
The experimental values of density and viscosity for binary solutions diethylenetriamine (DETA) + H2O, DETA + N,N-diethylethanolamine (DEEA), and ternary solution DETA + DEEA + H2O over the entire concentration range were reported at atmospheric pressure and T = (293.15, 303.15, 313.15, 323.15, 333.15) K. The measured densities and viscosities were used to calculate the thermal expansion coefficient, excess molar volume, partial molar volume, apparent molar volume, partial molar volume at infinite dilution, viscosity deviation, and excess Gibbs free energy of activation for viscous flow. The molecular interactions in mixtures were discussed based on the volumetric and viscometric properties.
研究领域:
物理化学
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分子科学
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2025
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IF 9
Ying-Ru Zhu,Hao Tang,Hao-Ran Zuo,Ming Duan
Thermal stability of membranes has become an emerging pivotal feature in treating hot process water at its original temperature through membrane filtration. Inspired by the highly thermal stability of cross-linked polymers, amide group was designed to enhance the chemical interaction between selective layer and support layer which was constructed by diethylenetriamine (DETA) modified intra-cross-linked colloidal PAN particles to reinforce the thermal stability of selective layer. The T g of polyamide (PA) selective layers was elevated from 50.09ºC to 105.06ºC by the chemical interaction. Accordingly, the thermally stable PAN-DETA-C nanofiltration (NF) membrane exhibited stable permeance of 9.6 L·m −2 ·h −1 ꞏbar −1 and rejection to Na 2 SO 4 of 96.5% at 90ºC for 32 h. The thermal stability mainly stemmed from the robust cross-linked chains, which was not only intra-cross-linked but also was chemically anchored on support layer, in selective layer. Moreover, PAN-DETA-C exhibited excellent anti-fouling performance at 90ºC, where the FRR of 0.97-0.99 against HA, BSA, and SA was obtained. This study developed a strategy for constructing thermally stable NF membrane with commercial materials through the same manufacture process as commercial NF membrane dose.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
DALTON TRANSACTIONS
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2019
·Vol. 48
·期 12
·4015-4025
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IF 4.052
Haiyu Wang,Zhiliang Jin,Xuqiang Hao
The development of a highly active and stable non-noble-metal hydrogen-producing catalyst for renewable energy reserves and conversion remains a serious challenge. In this work, we described a novel binary solution (DETA/H2O) reaction for preparing a composite catalyst composed of CdS nanoparticles grown on CoSe2 nanobelts. The composite catalyst (CoSe2/CdSDETA) exhibits excellent catalytic activity for a hydrogen evolution reaction in an EY sensitized 15% (v/v) TEOA aqueous solution under visible light irradiation (λ ≥ 420 nm). Moreover, the catalytic activity of the P-doped sample (CoSe2/CdSDETA|P) was further improved. The excellent performance is ascribed to the synergy among DETA and atomic-level P-doping. Some essential characterization methods such as XRD, SEM, TEM, UV-vis diffuse spectroscopy, XPS, photoelectrochemistry, PL, etc. were carried out to support the related results and a possible reaction mechanism was put forward.
研究领域:
材料科学
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能源化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2020
·
IF 7.183
Xi Zhang,Chang Liu,Jing Yang,Xiao-Jun Huang,Zhi-Kang Xu
Separation membranes with switchable wettability show great potential in the efficient treatment of both oil-in-water and water-in-oil emulsions. There still remain some critical challenges to prepare these membranes by a facile procedure and to elucidate the wettability response mechanism reasonably. Herein, commercial polypropylene membranes are endowed with switchable surface wettability by a simple co-deposition method of tannic acid and diethylenetriamine. The as-fabricated membrane surfaces are hydrophilic due to water immersion but hydrophobic after ethanol treatment. This hydrophilicity-hydrophobicity translation can repeat cyclically by water/ethanol treatments without losing the surface wettability. DFT simulations are used to calculate the solvation free energies of tannic acid in water and ethanol, respectively, to illustrate the chemical mechanism of the hydrophilicity-hydrophobicity translation. The results are in accordance with UV–vis spectra of the polyphenol in both solvents. The wettability switchable membranes show great potential in separating both oil-in-water and water-in-oil emulsions with excellent efficiency (98%). Moreover, the driving force for the separation processes can be an applied pressure of 0.1 MPa or merely the gravity of emulsions.
研究领域:
材料科学
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环境工程
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化学工程
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产品关联
DOI
高影响因子
GREEN CHEMISTRY
·
2019
·Vol. 21
·期 11
·3006-3012
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IF 9.405
Wenli An,Xiong-Lei Wang,Yang Yang,Huaxiu Xu,Shimei Xu,Yu-Zhong Wang
With high dimensional stability, chemical resistance, and thermal stability, unsaturated polyester (UP) resins are indispensable for many applications, causing the ever-increasing generation of waste UP. However, the conventional chemical recycling of UP is usually carried out under harsh conditions to produce monomers or oligomers along with a complex separation process. Developing a facile and easy approach is highly desired to explore the inherent value of UP and transform it into high-value products. In this study, an efficient strategy was developed for the chemical recycling of UP with the synergistic catalysis of the binary alkali of diethylenetriamine and sodium hydroxide under mild conditions. Diethylenetriamine functions as both a reactive solvent and a catalyst. The presence of diethylenetriamine facilitates the degradation, while only hydrolysis is observed without amination. The compositions of the degraded products can be controllably adjusted by varying the amount of binary alkali. Moreover, the main products can be easily separated from the reaction system by simple filtration. The ester bonds in the UP are selectively cleaved, producing large amounts of active groups such as hydroxyl, sodium carboxylate, ammonium carboxylate and amino groups. A novel gel material can be obtained and it demonstrates a fast adsorption performance and large adsorption capacity for cationic dyes and heavy metal ions.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NANOBIOTECHNOLOGY
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2020
·Vol. 18
·期 1
·1-10
·
IF 6.518
Fu Ji-jun,Guo Jun-jie,Qin Ai-ping,Yu Xi-yong,Zhang Qiang,Lei Xue-ping,Huang Yu-gang,Chen Ming-yue,Li Jie-xia,Zhang Yu,Liu Jing-ping,Dang Yuan-ye,Wu Dan,Zhao Xiao-ya,Lin Zhong-xiao,Lin Yin-lei,Li Song-pei,Zhang Ling-yan
Backgrounds Due to the unexpected side effects of the iodinated contrast agents, novel contrast agents for X-ray computed tomography (CT) imaging are urgently needed. Nanoparticles made by heavy metal elements are often employed, such as gold and bismuth. These nanoparticles have the advantages of long in vivo circulation time and tumor targeted ability. However, due to the long residence time in vivo, these nanoparticles may bring unexpected toxicity and, the preparation methods of these nanoparticles are complicated and time—consuming. Methods In this investigation, a small molecular bismuth chelate using diethylenetriaminepentaacetic acid (DPTA) as the chelating agent was proposed to be an ideal CT contrast agent. Results The preparation method is easy and cost—effective. Moreover, the bismuth agent show better CT imaging for kidney than iohexol in the aspect of improved CT values. Up to 500 µM, the bismuth agent show negligible toxicity to L02 cells and negligible hemolysis. And, the bismuth agent did not induce detectable morphology changes to the main organs of the mice after intravenously repeated administration at a high dose of 250 mg/kg. The pharmacokinetics of the bismuth agent follows the first—order elimination kinetics and, it has a short half—life time of 0.602 h. The rapid clearance from the body promised its excellent biocompatibility. Conclusions This bismuth agent may serve as a potential candidate for developing novel contrast agent for CT imaging in clinical applications.
研究领域:
医学影像学
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2018
·Vol. 25
·期 31
·31250-31261
·
IF 2.8
Wang Liang,Xie Yingjuan,Liu Wenxiu,Wang Qi,Cao Wenbin
TiO 2 microstructures were synthesized via a facile one-step route for enhanced intrinsic photocatalytic performance. The prepared TiO 2 microstructures are featured by both mesoporous core-shell structures and coexposed {001}/{101} facets. Their intrinsic photocatalytic performance were remarkably enhanced due to their high specific surface area, coexposed {001}/{101} facets, and promoted separation of photogenerated carriers. Furthermore, the origin and detailed mechanism for diethylenetriamine (DETA) that served as a high efficient stabilizer of TiO 2 {001} facet have been theoretically investigated. Finally, a new DETA-modified Ostwald ripening mechanism was originally proposed when studying the growth mechanism of the mesoporous core-shell TiO 2 spherical microstructures with coexposed {001}/{101} facets.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）