CHINESE JOURNAL OF POLYMER SCIENCE
·
2018
·Vol. 36
·期 8
·970-978
·
IF 2.016
Meng Xiang-Li,Yu Gen-Hua,Ma Jian
Novel poly(aryl ether sulfone ketone)s (PAESK) were synthesized from bisphenol A (BPA), 9,9′-bis(4-hydroxyphenyl) fluorene (BHPF), 4,4′-dichlorodiphenylsulfone (DCS) and 4,4′-difluorobenzophenone (DFB) via nucleophilic substitution polymerization, which were subsequently used to fabricate ultrafiltration membrane by phase-inversion method for high temperature condensed water treatment. The obtained high molecular weight co-polymers with fluorene group with good solubility and good thermal stability, can be easily cast into flexible, white and non-transparent flat films. The influence of molar ratio of BPA and BHPF on the properties of the prepared co-polymers and membranes was investigated in detail. SEM study of the morphology of the membranes indicated that the prepared membranes possessed homogeneous pores on the top surface and were sponge-like or finger-like in cross-section. Pure water flux of the membranes increased from 71.87 L·m −2 ·h −1 to 247.65 L·m −2 ·h −1 , while the retention of BSA decreased slightly, and the water contact angle decreased from 82.1° to 55.6° with the PVP concentration from 0 wt% to 10 wt%. With increasing concentration of PVP, the mechanical properties of membranes decreased, while the thermal stability increased. The permeate flux measurement showed that the PAESK membrane had the potential for high temperature condensed water treatment.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Muhammad Imran Jamil,Yuhang Cai,Waqar Ahmed,Xiaoli Zhan,Fengqiu Chen,Dangguo Cheng,Qinghua Zhang
Natural species use their surface structures for water harvesting. It is the dire need of the hour to learn from nature, mimic its functions, and solve the water scarcity problem through dew condensation . However, the present microscale and nanoscale approaches still suffer from complicated fabrication methods and durability failure in harsh conditions. Here, we introduce a bioinspired slippery surface of candle soot particles which uses its bumps to enhance the growth of condensed water droplets. The Namib desert beetles-inspired convex topography, cacti-inspired asymmetric slope, and Nepenthes pitcher plant-inspired slippery surface of soot particles synergistically combines the large droplet nucleation density, fast droplet coalescence, and easy removal of droplet from the surface. The hydrophilic SLIPS of soot particles harvests water at a rate of 326.4 ± 9 mg/cm 2 h -1 which is 70 % high as compared to hydrophobic SLIPS of soot particles. The fluorinated SLIPS reveals 32 % high water collection rate as compared to the methyl-terminated SLIPS of candle soot particles and the results are corroborated by calculating the intermolecular hydrogen bonding energies through DFT. The programmed motion of water droplet on a slippery surface of soot particles is also observed by applying laser light, heat, and magnetic field even against gravity. The slippery surface shows long-term stability due to nano-porosity, permeation of lubricant into soot particles and lubricant’s crosslinking ability with the binder. The developed surface is biocompatible, self-cleaning, and suitable for water harvesting particularly in cold and arid regions.
研究领域:
材料科学
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环境科学
·
生物学
✓ 已验证
产品关联
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2024
·
IF 8.2
Ce Wang,Yuling Lü,Hongwei Qi,Xiaoming Luo,Limin He
Flotation technology is widely utilized to remove emulsified oil droplets from Produced water. Organic acid adsorption on the oil droplet surface affects bubble attachment, reducing oil removal efficiency. This investigation exploited the principle of similar dissolution to synthesize condensate bubbles (CB). The surface properties of oil droplets and CB and air bubbles (AB) were appraised using FTIR, zeta potential , interfacial tension, and contact angle measurements. The research also investigated the effects of acetic acids (AA) on the adhesion of oil droplets to AB and CB along with the underlying mechanism via the Extended Derjaguin-Landau-Verwey-Overbeek (EDLVO) interaction theory and the Stefan-Reynolds model of liquid film thinning, integrated with adhesion times. Flotation efficiency and kinetic dissimilarities between AB and CB were also examined. The results indicated that CB exhibits superior lipophilic hydrophobicity compared to AB, reduced induction and spreading times upon oil droplet attachment, and maximized oil removal efficiency. Furthermore, CB could mitigate the impact of AA on adhesion. The interaction barriers between CB and oil droplets were minimal, and the thinning rate of the hydration film was quicker than in AB. The conventional first-order model proved effective in fitting the AB flotation, whereas a delay constant was applied to the model of the CB flotation rate.
研究领域:
环境科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR MODELING
·
2020
·Vol. 26
·期 4
·1-17
·
IF 1.346
Ma Yucong,Zhou Tingting,Zhu Wenqin,Fan Baomin,Liu Hao,Fan Guifeng,Hao Hua,Sun Hui,Yang Biao
A supramolecular polymer (CDP-DA) was prepared through the crosslinking reaction among the assembled complexes (CDDA) based on β-cyclodextrin (β-CyD) and octadecylamine (ODA). The structural properties of CDP-DA were clarified by experimental techniques such as Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscope, and thermal analysis. Based on the results of molecular docking, the crosslinking unit, CDDA, in the CDP-DA structure favors to exhibit the configuration that narrow rims of two host compounds (β-CyD) are opposite to each other leaving the amino group of ODA outside the host cavity. The corrosion inhibition performance of CDP-DA for mild steel in industrial condensate water was evaluated by electrochemical measurements and surface analyses, the mechanism of which was disclosed by molecular dynamics simulations in the aspects of adsorption equilibrium and ions diffusion models. The results of electrochemical tests indicate that CDP-DA effectively retards the anodic and cathodic reactions and improves the interfacial charge transfer resistance of mild steel in condensate water, which can be categorized as the mixed-type inhibitor. Surface analyses reveal that CDP-DA adsorbs on the steel surface in the integral form showing a monolayer nature, which is consolidated by molecular dynamics simulations. The diffusion behavior of in situ ions in the adsorbed layer is prominently suppressed as compared with those in bulk solution. The robust barrier layer and the mitigated diffusion of ions may contribute to the effective inhibition for CDP-DA against steel deterioration in the condensate water.
Anticorrosive mechanism of a cross-linked supramolecular polymer for mild steel in the condensate water
研究领域:
材料科学
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腐蚀与防护
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计算化学
✓ 已验证
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2023
·
IF 4.2
Yu Huang,Hongjun Hu,Lixun Zhang,Guoqing Yi,Songhong Yu,Zhaohui Wang,Zhaoliang Cui,Shuaifei Zhao
Two hydrophobic porous ethylene-chlorotrifluoroethylene (ECTFE) membranes quenched in water and air were fabricated by thermally induced phase separation and used for water recovery from ammonia-containing humid gas via vapor condensation. The ECTFE membranes were further hydrophobically modified to enhance their condensation performance. The condensate water quality of the modified membrane significantly improved. The mechanisms of the NH3 contamination in the condensate water were discussed. Surface hydrophobic modification slightly increased the flux and recovery stabilities of the membranes. However, the modification also increased the membrane surface roughness, which adversely affects the vapor condensation and droplet evolution on the membrane surface and reduced the recovered water quality. From the material perspective, desirable porous membranes for vapor condensation should have high surface hydrophobicity and smoothness and reasonably large pore sizes. The reasonably large pore sizes would promote noncondensable gaseous contaminants (e.g., ammonia) to go through the membrane, thereby improving the recovered water quality.
研究领域:
材料科学
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环境工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2014
·
IF 3.065
Hao Li,Qingni Yu,Bin Yang,Zhongjian Li,Lecheng Lei
Electrochemical treatment of artificial humidity condensate (AHC) in confined space has been conducted. Large-scale boron-doped diamond (BDD) film was deposited on Ta substrate by hot filament chemical vapor deposition, and its uniformity was evaluated by the Raman shift intensities on the basis of statistical analysis. BDD electrode was used as anode for the oxidation of organic compounds, and almost 98% final TOC removal efficiency of AHC was achieved. Higher oxidation rate constant, higher initial instantaneous current efficiency and lower specific energy consumption were obtained for the larger surface area electrode. Based on the detection of intermediates by HPLC and IC, a possible degradation pathway of AHC was also proposed. In addition, the potential utilization of H 2 generated on cathode for fuel cell was discussed. It is estimated that about 5% electric energy can be offset the electrochemical treatment cell by using the integrated operation.
研究领域:
环境科学
·
电化学工程
·
材料科学
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Yuxiang Miao,Ke Chang,Bo Zhang,Kun Zhang,Zixue Luo,Qiang Cheng
Solar-driven interfacial evaporation is considered as a promising approach to alleviate water scarcity. Through array-based design, the total evaporation area can be expanded without increasing the size of individual units, thereby enabling higher evaporation rates. However, in densely packed array structures, vapor tends to accumulate in the gaps between units, which suppresses the evaporation process and significantly limits the evaporation performance per unit area. To achieve higher evaporation rates, the present study systematically explores the influence of spatial arrangement on array evaporator performance, taking a 4 × 4 configuration as a representative case. Simulation results revealed that the natural evaporation rate reached a maximum of 0.46 kg m −2 h −1 when the spacing between adjacent evaporators was approximately 2.4 cm. Further analysis showed that when the radius of the evaporator was less than 0.8 cm, the optimal spacing was approximately three times the radius; whereas for radius larger than 0.8 cm, the optimal spacing stabilized around 2.4 cm, indicating a size-dependent spacing optimization strategy. In outdoor experiments, the optimized array evaporator achieved a maximum condensate collection rate of 0.70 kg m −2 h −1 , with an average condensate collection rate 1.74 times higher than that of the control group. This study proposes a systematic spacing optimization strategy for array evaporator, providing a valuable reference for the future large-scale application of solar desalination technology.
研究领域:
可再生能源
·
海水淡化
·
传热传质
·
太阳能技术
✓ 已验证
产品关联
DOI
高影响因子
Scientific Reports
·
2016
·Vol. 6
·期 1
·1-10
·
IF 5.228
Hu H. W.,Tang G. H.,Niu D.
Recovery of both latent heat and condensate from boiler flue gas is significant for improving boiler efficiency and water conservation. The condensation experiments are carried out to investigate the simultaneous heat and mass transfer across the nanoporous ceramic membranes (NPCMs) which are treated to be hydrophilic and hydrophobic surfaces using the semicontinuous supercritical reactions. The effects of typical parameters including coolant flow rate, vapor/nitrogen gas mixture temperature, water vapor volume fraction and transmembrane pressure on heat and mass transfer performance are studied. The experimental results show that the hydrophilic NPCM exhibits higher performances of condensation heat transfer and condensate recovery. However, the hydrophobic modification results in remarkable degradation of heat and condensate recovery from the mixture. Molecular dynamics simulations are conducted to establish a hydrophilic/hydrophobic nanopore/water liquid system, and the infiltration characteristics of the single hydrophilic/hydrophobic nanopore is revealed.
研究领域:
热能工程
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膜科学与技术
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化学工程
·
能源高效利用
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环境工程
·
材料科学
·
传热传质学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2013
·
IF 3.473
Shanshan Zhao,Peng Wang,Ce Wang,James L. Langer,Gulizhaer Abulikemu,Xin Sun
The purification and reclaiming of synthetic and industrial high temperature condensed water containing excess oil and iron is investigated in this study using thermostable poly(phthalazine ether sulfone ketone) (PPESK) ultrafiltration membranes. The results show operation parameters such as transmembrane pressure, temperature and pH of feed solution, initial oil and iron concentration each play important roles in the permeate flux and oil/iron removal efficiencies. Membrane performance is almost recovered after washing with a combination of NaOH and ethanol. High temperature condensed water from Daqing petroleum refinery can be consecutively purified using a PPESK ultrafiltration membrane. The turbidity of the solutions is almost removed. Oil and iron concentrations in the permeate solutions are below 1 mg/L and 50 μg/L, respectively, which satisfy the Quality Criterion of Water and Steam for Steam Power Equipment in China. UF process shows a promising alternative to existing technology in the Daqing petroleum refinery in terms of cost and environmental protection as well as energy recovery. For future possible combination of UF and NF process application, both economic cost and saving are evaluated, and the breakeven time is about 11 months.
研究领域:
化学工程
·
环境科学
·
水处理
·
膜技术
✓ 已验证
产品关联
DOI
高影响因子
DESALINATION
·
2012
·
IF 2.59
Shanshan Zhao,Peng Wang,Ce Wang,Xin Sun,Linhuan Zhang
Poly (phthalazine ether sulfone ketone) (PPESK)/TiO 2 organic–inorganic composite ultrafiltration (UF) membranes with enhanced performance for high temperature condensed water treatment were prepared using a phase-inversion method. The effects of TiO 2 concentration on the membrane morphologies, physic-chemical properties, membrane permeability and antifouling performance were investigated and discussed. The SEM result reveals that the penetrated finger-like structure in sublayer is suppressed, and sponge-like structure begins to be developed. The mechanical strength and thermal stability of composite membrane are improved due to the existence of hydrogen bond between TiO 2 and polymer. The permeate flux is also enlarged due to the improved hydrophilicity and porosity. Compared with neat PPESK membrane, the composite membranes present improved antifouling properties, showing lower filtration resistances, MFI values and better flux recover property during high temperature condensed water treatment. The optimal addition amount of TiO 2 is 2 wt.%. The high temperature condensed water with excess oil and iron can be treated efficiently using PPESK/TiO 2 composite membrane. The turbidity of feed solution is almost removed. The oil and iron concentrations in permeate solution are 0.89 mg/L and 26.4 μg/L which meet the Quality Criterion of Water and Steam for Steam Power Equipment in China.
研究领域:
材料科学
·
环境工程
·
膜技术
·
水处理
✓ 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）