MINERALS ENGINEERING
·
2025
·
IF 5
Panxing Zhao,Wenbao Liu,Wengang Liu,Lingyun Bao,Yanbai Shen,Stephen Butt,Yahui Zhang
Removal of quartz from hematite by reverse flotation using cationic collectors is an effective approach for iron concentrate upgrading. In this paper, three hydroxyl-containing cationic collectors, i.e., N-Dodecylethanolamine (NDEA), N-Dodecylpropanolamine (NDPA), and N-Dodecylbutanolamine (NDBA), were synthesized and characterized. The flotation performance and the structure-performance relationship of the collectors were systematically investigated by micro-flotation experiments and various surface analysis techniques. At the concentration of 20 mg/L, the flotation recoveries of quartz by NDEA, NDPA, and NDBA were 94.9 %, 93.5 %, and 93.3 %, respectively. Collectors with shorter hydroxyl-substituted carbon chains exhibited stronger collecting ability and enhanced hydrophobicity of quartz surface, as confirmed by contact angle measurements. Zeta potential measurements and molecular simulations revealed that the collectors adsorb onto the quartz surface through electrostatic and hydrogen bonding interactions. The introduced hydroxyl groups could enhance the formation of hydrogen bonds between collectors and mineral surface. However, as the carbon chain length increases, the adsorption area of a single collector on the mineral surface increases, the number of collector molecules adsorbed per unit area decrease, reducing the collecting ability of the collector for quartz. This research could provide theoretical guidance for the design of novel cationic collectors.
研究领域:
矿物加工工程
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2016
·
IF 2.75
Xing Du,Lei Zhao,Xuan He,Hui Chen,Wei Fang,Weixin Li
Ultra-stable foams with multilayer films which were similar to the structure of colloidal gas aphrons (CGA) were designed in view of increasing the amount of bound water molecules at molecular level. This liquid films in foams were spontaneously assembled by 1-dodecanol (DDA), sodium dodecyl sulfonate (SDS) and polyvinyl alcohol (PVA) molecular with a remarkable long-term foam lifetime. The states of water molecules as well as the molecular arrangement in foam films have been analyzed via molecular dynamics (MD) simulation to explore microscopic character and stable mechanism of multilayer films of foams. We found that the combined effect of SDS, DDA and PVA could not only increase distribution intensity of bound water molecules in foam film layers, but it also could decrease the gas diffusion rate to balance the pressure of the air layers of the multilayer foams.
研究领域:
化学
·
材料科学
·
界面科学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Wenbo Fu,Lu Sun,Xiaoming Zhang,Hualong Xu,Meiwen Cao
The effects of sodium dodecyl sulfate (SDS) and sodium dodecyl benzene sulfonate (SDBS) on the corrosion inhibition of xanthan gum (XG) on Q235 carbon steel were investigated. The corrosion inhibition performance was characterized by weight loss, kinetic potential polarization, electrochemical impedance spectroscopy (EIS), scanning electron microscopy (SEM), and ultraviolet-visible spectroscopy (UV–vis) measurements. XG significantly reduced the corrosion rate of Q235 steel in HCl solution, and the corrosion rate decreased with increasing XG concentration. XG acted as a mixed inhibitor to inhibit corrosion by forming a protective adsorption layer on the metal surface. At a fixed SDS concentration, the XG/SDS mixture showed enhanced corrosion inhibition with increasing XG concentration, indicating that SDS had a synergistic effect on the corrosion inhibition of XG. In contrary, SDBS showed different behaviors in affecting the corrosion inhibition of XG. SDBS showed a synergistic effect on the corrosion inhibition at low XG concentrations, whilst further increasing XG concentration would not lead to a decreased anticorrosion performance. Structural variation in the adsorbed film formed by the XG/surfactant mixture on the metal surface is responsible for the anticorrosion performance. The study probes into the synergistic effects of surfactant on the ability of xanthan gum for metal corrosion inhibition, which is helpful for the development of more efficient and sustainable polymer/surfactant mixed corrosion inhibitors.
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
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 32
·78229-78242
·
IF 5.8
Chen Jiuyan,Zhang Qiang,Zhu Yuwei,Zhang Mengli,Zhu Yutong,Farooq Usman,Lu Taotao,Qi Zhichong,Chen Weifeng
To date, little information is available regarding the impacts of the widespread anionic surfactants on the adsorption behaviors of antibiotics onto typical iron oxides. Herein, we have investigated the effects of two typical surfactants (sodium dodecyl sulfate (SDS) and sodium dodecylbenzene sulfonate (SDBS)) on the adsorption of two widely used antibiotics (i.e., levofloxacin (LEV) and ciprofloxacin (CIP)) onto ferrihydrite. Results of kinetic experiments showed that the adsorption of antibiotics was well fitted by the pseudo-second-order kinetic models, indicating that the adsorption process might be controlled by chemisorption. The affinity of ferrihydrite toward CIP was greater than that toward LEV, which was ascribed to the higher hydrophobicity of CIP than LEV. Both surfactants enhanced antibiotic adsorption owing to SDS or SDBS molecules as bridge agents between ferrihydrite particles and antibiotics. Interestingly, the extent of the enhanced effects of surfactants on antibiotic adsorption declined as the background solution pH increased from 5.0 to 9.0, which was mainly due to the weaker hydrophobic interactions between antibiotics and the adsorbed surfactants on the iron oxide surfaces as well as the greater electrostatic repulsion between the anionic species of antibiotics and the negatively charged ferrihydrite particles at higher pH. Together, these findings emphasize the importance of widespread surfactants for illustrating the interactions between fluoroquinolone antibiotics and iron oxide minerals in the natural environment.
研究领域:
环境科学
·
土壤学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
·
2013
·Vol. 113
·期 3
·1297-1302
·
IF 1.982
Yan X.,Wang T. B.,Pei H. R.,Wang L. P.,Lan X. Z.
Phase behavior of dodecane–tridecane ( n -C 12 H 26 –C 13 H 28 , C 12 –C 13 ) mixtures in bulk and confined in SBA-15 have been investigated using differential scanning calorimetry. Bulk C 12 –C 13 system has a complicated behavior due to special rotator phase. It has been found that phase diagram of C 12 –C 13 /SBA-15 (3.8 nm) system is a straight line, C 12 –C 13 /SBA-15 (7.8 nm) a curve, and C 12 –C 13 /SBA-15 (8.9, and 17.2 nm) a loop line. The growth of the phase diagram shows size effect on phase behavior of C 12 –C 13 mixtures. Moreover, in the range of 3.8–17.2 nm melting temperatures of pure C 12 and mixtures at mole fractions x
C13 = 0.1–0.5 have linear relation with inverse pore diameter, while C 13 and mixtures at x
C13 = 0.6–0.9 present curved lines. The confined mixtures show a similar melting behavior with pure C 12 , C 13 .
研究领域:
物理化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF THERMOPHYSICS
·
2023
·Vol. 44
·期 4
·1-25
·
IF 2.2
Liang Ximei,Yang Jian,Meng Xianyang,Wu Jiangtao
A vibrating-wire apparatus was used to measure liquid density and viscosity simultaneously under high-temperature conditions. Densities and viscosities were measured along 11 isotherms at temperatures from (298.15 to 548.15) K and pressures up to 10 MPa for n -dodecane, and over a temperature range of (303.15 to 548.15) K and at equilibrium pressures up to about 6 MPa for carbon dioxide + n -dodecane. The estimated combined expanded uncertainties are 0.24 % for density and 2.2 % for viscosity with a confidence level of 0.95 ( k = 2). In addition, experimental density and viscosity data were correlated with the modified Tait equation and Tait–Andrade equation, respectively, and comparisons with literature data were made. With regard to n -dodecane, the equations present both literature data and our experimental results with deviations almost within 0.2 % for density, and 3.0 % for viscosity. For simplicity, the experimental data of carbon dioxide + n -dodecane were correlated using these two Tait-like equations directly without considering the mole fraction of CO 2 . Both correlations describe our measured data of carbon dioxide + n -dodecane almost within 0.2 % for density and 1 % for viscosity. Graphical Abstract
研究领域:
化学工程
·
物理化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2023
·
IF 9.2
Chun-Ping Li,Wen-Yue Zhang,Li-Xin Gao,Da-Quan Zhang
Surfactants attract attentions in aluminum-air batteries (AABs) due to its profound effects for anti-corrosion. This research proposes a patching reinforcement strategy using surfactants of dodecyl-β-D-maltoside (βD) and dodecyldimethyl benzyl ammonium bromide (DDBAB) to enhance the action of 8-hydroxyquinoline (8-HQ) as electrolyte additive . Hybrid surfactants consolidate the complexation of 8-HQ with aluminum , forming a dense protective film on the electrode surface . The results show that the assembled AABs has the highest capacity density of 2517 mAh·g −1 under optimizing condition, and the anode utilization rate reaches 84.5%. The corrosion protection efficiency can reach 87.2% on Al-5052 electrode in 4 M NaOH solution. This strategy provides a new method for using hybrid additives for AABs and aims to promote their commercial application.
研究领域:
电化学
·
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
·
2021
·
IF 3.512
Yinfei Liao,Hourui Ren,Maoyan An,Yijun Cao,Zhe Yang,Xiaodong Hao,Xingwei Song
It is well known that mixed collectors can effectively strengthen the flotation of low-rank coal. However, less concern has been paid to the detachment of low-rank coal flotation using mixed collectors. In this study, the force of air bubble detachment from low-rank coal surface treated by oleic acid (OA), dodecane (D), and oleic acid–dodecane (OA–D) collector mixture was investigated using microforce balance. The results showed that the process of bubble detachment from the low-rank coal surface was divided into three stages: relaxation stage, stretching stage, and sliding stage. The equilibrium contact angle and critical contact angle were the transition points between different stages. The order of detachment force required for bubble detachment from the surface of low-rank coal was OA–D > OA > D, indicating a synergistic effect between OA and D. Based on the three parameters of equilibrium contact angle, critical contact angle, and contact line length, a theoretical model was proposed to calculate the detachment force. The calculated results were in agreement with the measured results.
研究领域:
矿物加工工程
·
界面化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Chemistry
·
2012
·
IF 0
Xiao Yan,Hai-Rong Pei,Tong-Bo Wang,Wen-Bo Liu,Xiao-Zheng Lan
Phase behavior of undecane-dodecane mixtures (n-C11H24-C12H26, C11-C12) in bulk and confined in SBA-15 (pore diameters 3.8, 7.8, and 17.2 nm) has been studied by differential scanning calorimetry. Phase diagram of the confined C11-C12 system shows dependence on pore size, indicating simple behavior compared with the bulk. In the three systems, melting points of the confined C11, C12 and the mixtures ( = 0.1–0.9) present a linear relation with the pore diameter from 3.8 to 17.2 nm. Melting behavior of the confined C11-C12 mixtures is closely as the confined C11, C12. Melting temperatures of the three systems have been fitted as a function of mole fraction .
研究领域:
材料科学
·
物理化学
✓ 已验证
产品关联
DOI
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
·
2013
·Vol. 116
·期 1
·469-476
·
IF 1.982
Wang L. P.,Wang T. B.,Gao C. F.,Lan X.,Lan X. Z.
Phase behaviors of dodecane–hexadecane ( n -C 12 H 26 –C 16 H 34 , C 12 –C 16 ) binary mixtures in bulk and confined in SBA-15 (pore diameters 3.8, 9.5, and 17.2 nm) are investigated using differential scanning calorimetry. According to the thermal analysis, the bulk mixtures belong to a system of partial miscibility with two solid solutions and a eutectoid in the range of mole fraction \( x_{{{\text{C}}_{ 1 6} }} \) = 0.1–0.8. Under confinement, phase behavior of C 12 –C 16 mixtures is distinct from the bulk. Inside pores of SBA-15 (3.8 nm), the solid mixtures has only a melting boundary. In the pores larger than 9.5 nm, phase behaviors of the mixtures show some resemblance to the bulk system. The growth of the phase diagram with the pore diameter clearly shows the size effect on the phase behavior of the confined mixtures. In comparison with those of chain length difference of pure components of two carbon atoms or less, C 12 –C 16 mixtures exhibit different phase behaviors not only in the bulk but also in the confined state.
研究领域:
物理化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
·
2022
·
IF 4.132
Maoyan An,Yinfei Liao,Zhe Yang,Yijun Cao,Xiaodong Hao,Xingwei Song,Hourui Ren,Aosheng Yang,Luojian Chen
It has been generally proved that mixed collectors can enhance the flotation of low-rank coal (LRC). However, the inhibition effect of mixed collectors on the detachment between particles and bubbles is still unclear. In this paper, the energy feature of air bubble detachment from the LRC surface in the presence of dodecane (D), oleic acid (OA), and the mixture of dodecane and oleic acid (OA–D) was studied. The effect of collectors on the LRC surface property was analyzed using contact angle measurement, X-ray photoelectron spectroscopy, and wetting heat measurement. The force and displacement during the detachment process were measured synchronously using microforce balance. The results showed that the collector treatment increased the C–C/C–H content and decreased the content of oxygen-containing groups on the LRC surface. The synergistic effect between OA and D enabled the mixed collector to exhibit higher contact angle and wetting heat. Bubble detachment from the LRC surface can be divided into two stages: bubble stretching and bubble sliding, which corresponded to activation energy and detachment work, respectively. The activation energy and detachment work decreased in the same order of OA–D > OA > D, indicating that the mixed collector OA–D increased the energy of bubble detachment from the LRC surface and enhanced the adhesion strength. The theoretical detachment work was calculated, and the calculated results were in agreement with the measured results. This research provides a new perspective on the mechanism of LRC flotation being improved by mixed collectors.
研究领域:
矿物加工工程
·
界面化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2016
·
IF 4.179
Peizhu Zheng,Handi Yin,Jihua Zhao,Weiguo Shen
In order to clarify the nature of the inter-micellar interactions, we developed an approach to obtain the intermicellar interaction enthalpy through measuring the mixing heats of dodecyltrimethylammonium bromide (DTAB)/1-dodecyl-3-methylimidazolium bromide (C 12 mimBr) mixed micelles by using flow-mixing calorimetry . It was found that the inter-micellar interaction enthalpies for this system were negative, representing the attractive enthalpy interactions between the mixed micelle droplets. These results are contradictory to those reported in the literature and interpreted by the predominant attractive dehydration effect of counterion. Static light scattering experiment revealed that the repulsive nature of the interaction characterized by the Gibss free energy should be dominated by the entropy interaction.
研究领域:
物理化学
·
表面化学
✓ 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）