SURFACE & COATINGS TECHNOLOGY
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2026
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IF 6.9
Jinjun Qiao,Lingyun An,Chenggong Chang,Haiyan Xia,Ziyi Wang,Leichao Meng,Zhanying Wang,Shenghua Ma,Jing Yuan
A corrosion-resistant plasma electrolytic oxidation (PEO) composite coating was fabricated on AZ31B magnesium alloy via incorporating a Na 2 WO 4 /SDS composite inhibitor, followed by silanization. The effects of the inhibitor on coating microstructure and corrosion resistance were investigated using XRD, FT-IR, XPS, SEM, potentiodynamic polarization and EIS. Silanization effectively sealed the PEO coating, increasing its thickness and compactness. Na 2 WO 4 and SDS further enhanced coating thickness and density, improving its physical barrier against corrosive media. The loaded Na 2 WO 4 reacted with dissolved Mg 2+ to form protective MgWO 4 , inhibiting substrate erosion. SDS's hydrophobic dodecyl chains adsorbed onto the coating, forming a directional hydrophobic layer that reduced water/Cl − contact and hindered corrosive media penetration. At the exposed substrate, SDS's hydrophilic end competed with adsorbed water via electrostatic attraction, suppressing hydrogen evolution and substrate corrosion. The P-W10S-SG coating (41.2 g/L Na 2 WO 4 , 10 g/L SDS) showed optimal performance. After 480 h immersion in 3.5 wt% NaCl, its |Z| 0.01Hz remained stable at 10 7 –10 8 Ω⋅cm 2 , representing five-order-of-magnitude improvement over pure PEO, and four orders over P-SG and P-W0S-SG coatings.
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DOI
高影响因子
DESALINATION
·
2021
·
IF 9.501
Yang Li,Tian-Hui Chen,Chun-Yang Yu,Tao Wu,Xue-Ting Zhao,Jie-Feng Pan,Li-Fen Liu
The integrity and uniformity of polyamide (PA) layer have a great influence on the separation performance of thin-film composite (TFC) polyamide reverse osmosis (RO) membrane. In this work, three kinds of micelles including the neutral macromolecule Pluronic F127 (PF127), anionic surfactant sodium dodecyl sulfate (SDS) and the PF127/SDS mixed micelles (PSMM), were proposed to be introduced in the aqueous phase to regulate the interfacial polymerization (IP) process with the purpose of constructing a more integrated and uniform PA separation layer of the RO membrane for seawater desalination . Compared to the single PF127 and SDS, the PSMM-1 (0.05 wt% PF127/0.05 wt% SDS) in the aqueous solution exhibited special advantages including unique three-dimensional (3D) spherical structure, lower solution viscosity and water-Isopar G interface tension (IFT), which sped up m -phenylenediamine (MPD) to homogeneously diffuse to the water-Isopar G interface and further regulated the interfacial polymerization reaction between MPD and trimesoyl chloride (TMC). Ultimately, the regulated RO membrane via PSMM-1 had more uniform PA layer and thus exhibited better comprehensive separation performances including higher salt rejection (more than 99.5%) and ideal water flux (about 35 L·m −2 ·h −1 ). This study provides a facile method of PA microstructure adjustment via micelles to fabricate higher-performance TFC RO membrane for seawater desalination.
研究领域:
材料科学
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环境工程
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DOI
高影响因子
DESALINATION
·
2024
·
IF 8.3
Chao Wang,Yangbo Qiu,Chenglin Zhang,Feng Li,Long-Fei Ren,Jiahui Shao
Membrane wetting, scaling and low flux are challenging obstacles for membrane distillation (MD). However, the lack of advanced membranes capable of achieving both high flux and high wetting/scaling resistance constrains MD potential applications. Herein, a dense Janus membrane (JM) was facilely developed by co-depositing a dense PVA/PDA layer on a highly porous PTFE substrate to overcome this dilemma and systematically compared with omniphobic PTFE substrates with varied pore sizes for the first time. Results showed that, unlike flux-resistance “trade-off” observed for PTFE substrates, dense JM effectively resisted 0.4 mM SDS at a high flux of 56.8 LMH and retarded membrane scaling by 20 mM oversaturated gypsum. Robust wetting resistance was primarily attributed to the sieving effect of the sub-nanometer surface layer, which greatly protected substrate from SDS adsorption and feed intrusion, and was less affected by severe surface concentration polarization and relatively low substrate LEP than PTFE substrates. Strongly polar PVA/PDA layer provided a much more thermodynamically unfavorable continuous interface for gypsum adhesion than PTFE substrates, which played a key role in determining anti-scaling behavior. In contrast, gypsum still tended to rapidly cause membrane scaling in stagnant zones within PTFE substrates when flux was increased. This study shall provide new insights in designing high-performance membranes for robust hypersaline wastewater treatment, and highlighting dense JMs with a macroporous substrate and a highly hydrophilic dense surface layer as ideal alternatives.
研究领域:
材料科学
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化学工程
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环境工程
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DOI
高影响因子
Biomed Research International
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2014
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IF 0
Jianhua Hao,Junzhong Liu,Mi Sun
A bacterial strain C5 that can produce new type of marine esterase was isolated and screened from marine sludge. According to 16S rRNA sequence analysis and physiological and biochemical experiments, the strain was identified as Bacillus subtilis. A single isozyme with a molecular weight of 86 kDa was observed by SDS-PAGE and native-PAGE. On this basis, the mechanism of esterase B1 secreted by strain C5 degrading parathion-methyl was explored, and the effects of temperature and pH on the degradation rate were investigated. From the results, p-nitrophenol was one of the degradation products of B1 degrading parathion-methyl, and the best degradation effect could be achieved at the temperature of 40°C and the neutral pH value.
研究领域:
微生物学
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环境科学
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生物技术
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DOI
PubMed
Journal of Chemistry
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2020
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IF 1.79
Di An,Liang Li
Nanofibril system constructed by protein self-assembly is widely used in the food industry because of purposive functional properties. Soy protein isolate nanofibrils (SPINs) were reported to form via heating at pH 2.0. In this research, the soy protein isolate (SPI) hydrolysate prepared by trypsin was used as a raw material for the formation of nanofibrils called soy protein isolate hydrolysate nanofibrils (SPIHNs). Microscopic images demonstrated the formation of two nanofibrils. Based on circular dichroism spectroscopy and Thioflavin T (ThT) fluorescence spectral, we concluded that β-sheet played an important role in SPIN and SPIHN’s structural composition. At the same time, the α-helix in SPI had not been destroyed, thereby favoring the formation of SPIHN. The surface hydrophobicity of SPIHN continued to increase during the heating process and reached the highest value when heating 8 h. SDS-PAGE analysis showed that peptides produced by enzyme-modified SPI affected the formation of SPIHN. These results proposed that enzymatic hydrolysis prior to acidic during fibrillation process affected the fibrillation of SPI, and the peptides formed by enzymatic hydrolysis were more efficient for the self-assembly process. This study will provide a theoretical basis for the future research of SPI nanofibril functionality.
研究领域:
食品科学
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蛋白质化学
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纳米技术
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DOI
高影响因子
Journal of Materials Chemistry A
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2013
·Vol. 1
·期 45
·14306-14310
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IF 0
Yaohui Qu,Zhian Zhang,Xiwen Wang,Yanqing Lai,Yexiang Liu,Jie Li
The hollow carbon nanospheres (HCNSs) were prepared using a simple SDS-assisted self-assembly method, and a sulfur–carbon composite based on HCNSs was synthesized for lithium–sulfur batteries by a vapor phase infusion method. The sulfur–HCNS composite was characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (SEM), transmission electron microscopy (TEM), and thermogravimetry (TG) measurements. It is found that the elemental sulfur was dispersed inside the pores of carbon spheres. It is demonstrated from the galvanostatic discharge–charge process and cyclic voltammetry (CV) that the sulfur–HCNS composite has a large reversible capacity and an excellent cycling performance as cathode materials. The sulfur–HCNS composite with a sulfur content of 47.6 wt% displays an initial discharge capacity of 1031 mA h g−1 and a reversible discharge capacity of 477 mA h g−1 after 100 cycles at 0.5 C charge–discharge rate.
研究领域:
材料科学
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能源存储与转换
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DOI
DESALINATION
·
2022
·
IF 11.211
Yaxu Guan,Shao-Lu Li,Zhenxing Fu,Yiwen Qin,Juntao Wang,Genghao Gong,Yunxia Hu
In this work, we synthesized a zwitterionic polymer PEI-CA for the first time and then grafted it onto the surface of polyamide RO membrane via layer-by-layer interfacial polymerization (LbL-IP). XPS and ATR-FTIR techniques were used to verify the successful modification with PEI-CA. The zwitterionic hyperbranched polymer PEI-CA endowed the modified membrane with much improved surface hydrophilicity and decreased surface negative charge. The tailored M-PEICA exhibited a high water permeance up to 3.92 L m −2 h −1 bar −1 (increased by 62 %) while holding a good NaCl rejection (98.93 %). The dynamic fouling experiments proved that grafting of PEI-CA can help to effectively elevate its antifouling performance against most organic foulants except small molecular negatively charged surfactant SDS. Therefore, we further employed the mixed reagents modification strategy with arginine and PEI-CA, the resulting RO membrane M-mixed presented obviously improved antifouling performance towards SDS, the overall antifouling performances are even better than the well-known RO membrane CR100 of DOW FILMTEC™, that well illustrated multiple reagents modification strategy could be an efficient way that can meet all critical standards. Overall, the novel polymer PEI-CA and as-fabricated RO membranes with outstanding antifouling performances in this study have vast application potential in field of water treatment .
研究领域:
水处理
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膜科学
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材料科学
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DOI
高影响因子
MINERALS ENGINEERING
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2026
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IF 6
Qi Cheng,Shiyong Zhang,Sheng Liu,Guangyi Liu
DDA + SDS with molar ratio of 3:7 could efficiently separate lepidolite from albite and quartz at pH ∼ 8.0. • The adsorption mechanisms of DDA + SDS on lepidolite, albite and quartz were unraveled by AFM force measurement. • DDA + SDS adsorbed on lepidolite surface by the hydrophobic and electrostatic attractions. • DDA + SDS adsorbed on albite and quartz surfaces by the electrostatic attraction. This study investigated the underlying flotation mechanism for separating lepidolite from lepidolite-albite-quartz mixture via the combined collectors of dodecylamine (DDA) and sodium dodecyl sulfate (SDS). The micro-flotation results exhibited that DDA + SDS could efficiently separate lepidolite from their mixture without depressant. At pH ∼ 8.0 and the molar ratio of DDA: SDS = 3:7, DDA + SDS with the total dose of 2.0 × 10 -4 mol/L achieved 85.05% Li 2 O recovery with Li 2 O grade of 4.07% from the artificial mixture of the three minerals with the mass ratio of 1:1:1. The results of contact angle, adsorption capacity, zeta potential, optical microscope image, FTIR, in-situ AFM image demonstrated that DDA could adsorb on lepidolite, albite and quartz surfaces and render them hydrophobic. The presence of SDS slightly affected DDA’s adsorption onto the lepidolite surface, while significantly inhibited DDA’s adsorption on the albite and quartz surfaces. AFM force measurements implied that the hydrophobic attraction existed between lepidolite’s Si-O tetrahedra and the carbon chain of DDA + SDS, while that was absent in albite and quartz surfaces. Thus, DDA + SDS could adsorb on lepidolite surface via hydrophobic and electrostatic attraction. While, it only exhibited the weakly electrostatic attraction to albite and quartz surfaces, thereby hardly adsorbing on their surfaces and rendering them hydrophobic. The different adsorption configurations of DDA + SDS on lepidolite, albite and quartz caused the different wettability and floatability, promoting the selective separation of lepidolite from their mixture. The adsorption mechanism of DDA+SDS on lepidolite, albite and quartz surfaces. Download: Download high-res image (183KB) Download: Download full-size image
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高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2017
·Vol. 24
·期 26
·21011-21023
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IF 2.741
Liu Yunsong,Chen Jiajun,Wang Qingwei,Shi Lanxiang,Shi Yandan
Viscosity remedial technology, which uses a water-soluble polymer mixed with remedial fluids, has been introduced in recent years to improve the removal efficacy of perchloroethylene/tetrachloroethylene (PCE) by improving oxidant coverage (i.e. sweep efficiency). Xanthan gum and hydrolysed polyacrylamide (HPAM) are relatively stable with time and temperature and possess salt and oxidation resistance, indicating that they may be good flooding agents (the former is better than the latter in this work). In this work, we quantified the polymer directly improved oxidation of PCE during transport by using a two-dimensional flow tank. Using a low pore volume (≤3.0), the removal rate of the PCE increased with the polymer concentration before stabilizing at approximately 93.00 and 88.30% for xanthan and HPAM, respectively. In this work, over 80% of PCE was removed via less than 3.0 PV of the SDS solution, whereas complete removal (100%) was achieved with less than 3.0 PV of SDS foam. Furthermore, the new experimental discoveries demonstrate that xanthan is better than HPAM and SDS foam is a better remediation agent than the SDS solution for removing PCE.
(Reaction device, A - inlet device (pump 1#), B - 2D tank, C - outflow device (pump 2#), D - data recording and processing device, E - microscopic expression, E (a) - KMnO 4 flushing, E (b) - polymer solution flushing).
研究领域:
环境科学
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化学工程
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土壤修复
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DOI
PubMed
高影响因子
BIODEGRADATION
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2016
·Vol. 27
·期 1
·37-46
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IF 2.208
Zhou YuYang,Huang Huanlin,Shen Dongsheng
This study evaluated substrate interactions during the aerobic biodegradation of 1, 4-dioxane and BTEX mixtures by a pure culture, Acinetobacter baumannii DD1, which is capable of utilizing 1, 4-dioxane for growth. A. baumannii DD1 could utilize BTEX as a sole carbon source, but could not utilize m -xylene and p -xylene. In binary mixtures, there was a lag of about 14 h before the degradation of BTE, and 1, 4-dioxane only started to be utilized when BTE was completely degraded by 1, 4-dioxane-grown DD1. Furthermore, the biodegradation rate of 1, 4-dioxane decreased from 73.33 to 40.74 mg/(h g dry weight) after the biodegradation of benzene. 1, 4-dioxane could not be degraded after the biodegradation of o -xylene in 80 h. DD1 could also not degrade m -xylene and p -xylene coexisting with 1, 4-dioxane. The ability of DD1 to degrade BTEX occurred in the following order: benzene > ethylbenzene > toluene > o -xylene > m -xylene = p -xylene. The biodegradation of 1, 4-dioxane was not activated in the mixture with o -xylene, primarily because of the accumulation of the specific toxic intermediate, 2, 3-dimethylphenol. The lag in BTE degradation was presumably because of the induction of enzymes necessary for BTE degradation. Additionally, SDS-PAGE analysis demonstrated that there were different proteins during the degradation of benzene and 1, 4-dioxane.
研究领域:
环境微生物学
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生物修复
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生物化学
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DOI
PubMed
高影响因子
Food Science and Human Wellness
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2020
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IF 2.455
Ting Zhang,Mengzhen Ding,Xichang Wang,Jian Zhong
The droplet and creaming stability of food emulsions stabilized by mixed emulsifiers is a research hotspot in the field of emulsions. In this work, we mainly explore the effect of pH change on the droplet and creaming stability of fish oil-loaded emulsions synergetically (Span 80 and SL) or competitively (Tween 80 and SDS) stabilized by gelatin/surfactant. The results demonstrate that initial droplet stability and droplet storage stability, and creaming stability of the pH-adjusted emulsions are dependent on both the adsorption ways of emulsifiers and the adjusted pH: (1) Competitively stabilized emulsions have more stable droplets than synergetically stabilized emulsions; (2) SDS-dominant competitively stabilized emulsions have more stable droplets than gelatin-dominant emulsions; (3) Basic pH-adjusted emulsions have more stable droplets than acidic pH-adjusted emulsions; (4) The synergetically stabilized emulsions at acidic pH have significantly higher creaming indexes than that at basic pH; and (5) The competitively stabilized emulsions have high or similar creaming indexes to that at acidic pH. Further, the mechanisms are proposed according to Stokes’ Law. This work will provide useful information to understand the interfacial properties of mixed emulsifiers in the food emulsions and promising application perspective for the development of food beverages including acidic and alkali beverages.
研究领域:
食品科学
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化学工程
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胶体科学
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DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2023
·
IF 11.2
Wei Liang,Qian Zhang,Hao Duan,Shiqi Zhou,Yaxi Zhou,Wenhao Li,Wenjie Yan
To investigate the influence of surface gelatinization on cold plasma (CP) modification of starch , this study used CaCl 2 to modify maize starch by surface gelatinization , further combined with CP treatment and characterized its multi-scale structure and physicochemical properties. The results revealed that starch surface gelatinization causes roughness and fragmentation on the granule surface, and CP undergoes etching effects. The synergistic modification promotes starch degradation, as evidenced by molecular weight decrease and short-chain ratio increase. Although the growth rings, FT-IR patterns, and crystal types of starch remained unchanged, the synergistic modification induced a reduction in the short-range orderliness and crystallinity of starch, thus causing a decrease in the pasting properties and contributing to its solubility. Notably, the CP treatment improved the RDS and SDS contents of the gelatinized starch due to more active sites on the granule surface after gelatinization, and this finding may provide insight into the deep processing of starch.
研究领域:
食品科学
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材料科学
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化学工程
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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）