ENERGY & FUELS
·
2021
·
IF 3.605
Xin Lv,Xiaojiang Li,Yang Ge,Qingping Li,Hongsheng Lu
In this work, the approach for separating paraffin wax is proposed by using Span 80 combined with switchable water N,N,N′,N′-tetramethyl-1,6-hexanediamine (TMHDA), where the emulsification of paraffin wax can be promoted and paraffin wax is also separated sustainably. Here, the Span 80-containing mixture system exhibits an enhanced emulsification ability and CO2-switchable behavior upon the addition of TMHDA. Then, the paraffin wax is effectively emulsified by this switchable system containing Span 80 and TMHDA. Based on the detection of water separation rate, rheological behavior, and micrographs of emulsified paraffin wax, it is found that the emulsification of paraffin wax can be improved by increasing the paraffin wax content and Span 80 content, and the viscosity of the paraffin wax is reduced after emulsification by this switchable system, which ascribes to the dispersion of wax crystals. In addition, the paraffin wax is separated upon introducing CO2, and the TMHDA solution is recovered upon treating with N2 at 65 °C after separating the paraffin wax. The sustainable separation of paraffin wax results from the aggregation of wax crystals because of the reduced obstruction of oil droplets for wax crystals caused by the high ionic strength and the reduced surface activity of this system upon introducing CO2. Herein, it is expected that this sustainable separation can be applied in deposited wax removal in pipelines of crude oil transport.
研究领域:
化学工程
·
能源科学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Yajie Ding,Jindan Wu,Jianqiang Wang,Haibo Lin,Jiping Wang,Ge Liu,Xiaoqiang Pei,Fu Liu,Chuyang Y. Tang
We report a novel and facile welding strategy using Span 80 to simultaneously enhance the mechanical robustness and superhydrophilicity of an electrospun poly(vinylidene fluoride) (PVDF) nanofibrous membrane. By taking advantage of its amphiphilic property, Span 80 micelle is able to attach PVDF nanofibers due to the strong affinity between the hydrophobic segments of Span 80 and PVDF. The as-prepared PVDF nanofibrous membrane exhibited simultaneously improved stress (from 1.7 ± 0.3 MPa to 8.8 ± 0.6 MPa). Meanwhile, supherhydrophilic property was endowed through the self-assembly of Span 80 on the hierarchical surface of PVDF membrane. Water contact angle (WCA) and under-water oil contact angle (UOCA) of the modified membrane was nearly 0 and 154.9 ± 2 o , respectively. This membrane had a water permeability of 18,482.7 ± 287.3 Lm −2 h −1 bar −1 for 1, 2-dichloroethane-in-water emulsion with a separation efficiency of 96.3%. The welded PVDF nanofibrous membrane exhibited extraordinary robustness, resisting to long-term washing of water and oil-in-water emulsion.
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Guojun Lv,Yan Chen,Xuyang Zou,Jiangzhang Wang,Tao Wang,Xubin Zhang,Fumin Wang
There are few reports concentrated on the interactions between lipophilic surfactants and hydrophobized hollow TS-1 zeolite particles in the stabilization of emulsions. In this study, hydrophobized hollow TS-1 zeolite particles were synthesized and applied as emulsifier to stabilize the W/O Pickering emulsions employing cyclohexanone and water, and the influence of addition of lipophilic Span 80 on the stability of the W/O Pickering emulsions was systematically studied. Surprisingly, a phase inversion was induced by simply changing the Span 80 concentration. At fixed concentration of TS-1 zeolite particles (2 wt%), emulsions are water in oil (W/O) when the concentration of Span 80 is lower than 0.5 mM. Then the emulsions invert to oil in water (O/W) when the Span 80 concentration is between 1 mM and 8 mM. In this process, different emulsifiers dominate the composition of the interfacial layer, and the emulsion type is correspondingly controlled. When Span 80 concentration is lower than 0.5 mM, hydrophobized hollow TS-1 zeolite particles are in domination, and W/O emulsions are obtained. At Span 80 concentration of 1–8 mM, the emulsions are stabilized mainly by Span 80, and the emulsion type is O/W.
研究领域:
化学工程
·
材料科学
·
界面化学
✓ 已验证
DOI
高影响因子
Arabian Journal of Chemistry
·
2022
·
IF 6.212
Jinjian Hou,Mingyao Cao,Keyi Duan,Lingyu Sun,Shuanglong Lin,Ming Zhang,Wei Li
In this study, we used the Span 80 to enhance solvent extraction process, and we explored the mechanism. The results indicated different solvents would obtain different oil recovery, and toluene showed the optimal oil recovery, and the n-heptane showed the lowest oil recovery. The complex solvents could improve oil recovery. Toluene could make the heavy oil show the lowest viscosity (89.6 Pa.S), and n-heptane make the heavy oil show the highest viscosity (176.3 Pa.S). Complex solvents could decrease the heavy oil viscosities. The higher C/H was, the higher heavy oil recovery was, and when the asphaltene and resins content increase, the C/H would increase. The C/H showed the highest value (9.09, by toluene) and the lowest value (8.15). In this study, Span 80 could increase heavy oil C/H ratio, decrease heavy oil viscosity. Span 80 could make the sands surface more hydrophilic, and then the solvent loss would decrease. The oil recovery was high after 10 times recycle use.
研究领域:
石油工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 5
·2593-2598
·
IF 2.936
Hailin Cong,Bing Yu,Lilong Gao,Bo Yang,Fei Gao,Hongbo Zhang,Yangchun Liu
Microporous, hollow, or macroporous polymer spheres were prepared by a seed emulsion polymerisation method. Different from the conventional seeded emulsion polymerization, the sorbitan monooleate (Span 80) was added to the seeded emulsion polymerization. In this study, the monodisperse PS seeds prepared by dispersion polymerization were swelled by dibutyl phthalate (DBP), glycidyl methacrylate (GMA), divinylbenzene (DVB) and Span 80 successively. The effect of the amount of Span 80 on the morphology of microspheres was investigated. As different amount of Span 80 was added to the mixture, the poly(glycidyl methacrylate-divinylbenzene) (PGMA-DVB) microspheres showed a variety of morphologies containing microporous, hollow, and macroporous structure. In addition, uniform hollow particles with different pore size can be obtained through adjusting the amount of Span 80.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENERGY & FUELS
·
2023
·
IF 5.3
Changhong Yu,Cheng Yue,Baojiang Sun,Pengcheng Jing,Yuxiang Xia,Litao Chen
Hydrate control has raised great interest as it plays a crucial role for the flow assurance in oil and gas industry. In this work, the effect of silica nanoparticles to two antiagglomerants, Span 80 and cocamidopropyl dimethylamine, for hydrate formation and agglomeration was investigated by using high pressure stirring cell. At higher hydrate volume fraction (≥12%) during the hydrate formation process, the abnormal reduction of hydrate volume fraction was detected, which may be local dissociation of hydrate by the frictional heat accompanied by the heterogeneous temperature distribution in the cell. For the system without AAs, the relative current curve exhibited the upward kinks due to the ongoing hydrate agglomeration, whereas downward kinks were observed in systems with hydrate AAs. It is suggested that the downward kinks in the relative current curves could be used as one of the signs for effective hydrate AAs in the partial dissociation system. An addition of 0.75 wt % hydrophobic silica nanoparticles to 0.5 wt % Span 80 system shows an equivalent antiagglomeration performance of 2 wt % Span 80. The nanoparticles could hinder the nucleation process, and the induction time can be prolonged by ∼6.4 h with the addition of 0.5 wt % hydrophobic nanoparticles. For another AA, cocamidopropyl dimethylamine, the effective concentration of silica nanoparticles could be significantly reduced to 0.1 wt % at the higher hydrate volume fraction (∼30%). The new formulation was also found with kinetic inhibition effect, and the induction time can be prolonged to ∼2.9 h with the addition of 0.1 wt % nanoparticles. The silica nanoparticle at the favorable low concentration exhibited great potential as an efficient synergist to hydrate AAs in oil–gas–water cotransportation system.
研究领域:
石油工程
·
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Xinyu Zhai,Chunchen Ruan,Lei Chen,Xiaotian Peng,Shuai Yin,Hao Peng
The binary alkane system (C 6 -C 7 , C 6 -C 8 ) was comprehensively explored in this study, and the best cryogenic eutectic n-alkane (70 %C 6 -30 %C 7 ) with freezing point of −115.8℃ and phase transition enthalpy of 123 J/g was designed. After comparing various non-ionic emulsifiers (Span 80, Tween 80, PVA 1788, Arabic gum, Xanthan gum) through volatilization test, Span 80 was selected as the best anti-volatilization emulsifier to synthesize MEPCMs. Different anionic and nonionic emulsifier ratios were studied and determined to be 9:1. Cryogenic MEPCMs were prepared by in-situ polymerization, and the energy storage, thermodynamic, anti-volatilization properties, anti-leakage, mechanical property and durability were characterized. The results show that the morphology of MEPCMs is complete, the core wall materials are well bonded, and the coating rate is 50.9 %. PEG was used as a cross-linking agent to modify the shell of MEPCMs. The characterization results show that PEG effectively improvs the flexibility of the wall material, and the enthalpy loss of the MEPCMs in the anti-leakage test is reduced from 66.4 J/g to 15.8 J/g. The preferred anti-volatilization emulsifier increases the durability of MEPCMs from 192 h to 240 h. After 60 phase transition cycles, the enthalpy value of the MEPCMs is almost unchanged. This study bridges the volatility defects of cryogenic phase change materials and strengthens the durability of MEPCMs in terms of both core-wall and wall materials, which provides an important basis for the utilization of cold energy in cryogenic systems such as LNG, liquid hydrogen, and liquid air.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2020
·
IF 7.183
Simin Yang,Jianqiang Wang,Lifeng Fang,Haibo Lin,Fu Liu,Chuyang Y. Tang
Intercalated structure and electrosprayed interfacial polymerization methods have recently been proposed for permeability enhancement of polyamide membranes. In this study, a Span 80 intercalated polyamide nanofiltration membrane was fabricated through electrospray for simultaneously improving the surface structure, interfacial stability and separation performance. The membrane obtained through electrosprayed interfacial polymerization (EIP) showed a water flux of 83.0 L m -2 h -1 at an applied pressure of 5.0 bar. The intercalated Span 80 severed as multifunctional layer for simultaneously lowering surface roughness (RSa value of polyamide, 7 nm), enhancing interfacial stability (better anti-backwashing ability) and separation performance (enhanced water flux and BPA rejection). The current study provides new opportunities for fabricating polyamide nanofiltration membrane with high performance by combination of EIP and reactive interlayer strategy.
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
DESALINATION
·
2025
·
IF 9.8
Huilian Sun,Shuai Wang,Shiqi Wang,Yongchen Song,Zheng Ling,Lunxiang Zhang
Green utilization and sustainable desalination based on hydrate formation have attracted considerable attention. However, its industrial application is limited by slow kinetics and low final-conversion considering hydrate phase change. In this study, we creatively present a desalination approach of dispersed hydrate formation by incorporating the non-ionic surfactant Span 80. The addition of Span 80 enhanced the dispersion of cyclopentane (CP) in saline solution and generated the micron emulsion; as a result, the contact of the host water molecules and the guest molecules increased and the CP hydrate formation accelerated. Meanwhile, a maximum water yield of 92.8 % was achieved and the corresponding growth percentage of 97.5 % was realized comparing without Span 80 in a 3.5 wt% NaCl solution. In addition, this dispersed approach of hydrate-based desalination (HBD) also showed great performance in high concentration wastewater treatments like the solutions of saline and heavy metal. A three-stage purification strategy could produce the clean water meeting the stringent drinking water standard. Additionally, this approach exhibited notable pH tolerance under both strongly acidic and alkaline conditions. The results also demonstrated that Span 80 exhibits impressive self-separation recovery characteristics and cycling stability. These findings provide a robust academic foundation for advancing the feasibility and sustainability of the dispersed HBD in practical seawater desalination applications.
研究领域:
环境科学
·
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2024
·
IF 8.2
Zhen-tian Feng,Jiang-bo Xiong,Guo-feng Wang,Lin Li,Chun-fei Zhou,Chun-huo Zhou,Hua-jun Huang
Treatment of swine manure by hydrothermal carbonization (HTC) with the aid of different surfactants was first explored in this study. PEG 400 (polyethylene glycol 400) and Tween 80 facilitated the formation of bio-oil. SLS (sodium lignosulfonate) and SDS (sodium dodecyl sulfate) promoted the formation of water-soluble matters/gases. Span 80 enhanced the formation of hydrochar , which resulted in a 50.19 % mass yield, 92.39 % energy yield, and a caloric value of 28.68 MJ/kg. The hydrochar obtained with Span 80 presented a similar combustion performance to raw swine manure and the best pyrolysis performance. The use of Span 80 promoted the transfer of degradation products to hydrochar, especially hydrophobic ester and ketone compounds. Notedly, Span 80 suppressed the synthesis of PAHs during the HTC process, which was reduced to 0.92 mg/kg. Furthermore, the hydrochar produced with Span 80 contained lower contents of heavy metals. On the whole, Span 80 has shown great potential in enhancing the HTC of swine manure. The acting mechanisms of surfactants in the HTC of swine manure included adsorption, dispersion, and electrostatics repulsion.
研究领域:
环境科学
·
能源工程
·
生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Fei Han,Chunyang Yin,Lulu Liu,Hao Niu,Jianquan Luo,Yinhua Wan,Weijie Song,Wei Liu
Acidic wastewater, primarily generated from mining, metallurgical, and chemical industries, poses significant risks to both the environment and human health. Nanofiltration (NF) has emerged as a promising approach for treating such wastewater, yet the performance of acid-resistant membranes remains limited. In this work, acid-stable poly(amide-sulfonamide) (PASA) thin-film composite (TFC) NF membranes were fabricated via interfacial polymerization (IP), with the nonionic surfactant sorbitan monooleate (Span 80) employed to modulate the IP process, markedly enhancing membrane performance. Specifically, Span 80 was found to orient at the water–organic interface, significantly reducing interfacial tension and accelerating the diffusion of 3-aminobenzenesulfonamide (ABSA) monomers, thereby forming a thicker, highly cross-linked, and defect-free PASA selective layer. The optimized NF-0.1 membrane exhibited the smallest average pore size (0.635 nm) and a defect-free selective layer, with Na₂SO₄ and MgSO₄ (the concentration of the salt solution is 1000 mg/L) rejection exceeding 99 % and 95 %, respectively, while maintaining a moderate permeance of 3.05 ± 0.15 L·m −2 ·h −1 ·bar −1 . Long-term stability tests, pressure-resistance evaluations, and 35-day static acid immersion experiments demonstrated excellent operational stability, pressure tolerance, and acid resistance. Compared with previously reported acid-resistant NF membranes and commercial high-acid-stability membranes, NF-0.1 had a higher retention effect on monovalent and divalent sulfates. This work provides a simple and scalable strategy for producing defect-free, highly selective PASA acid-resistant NF membranes and highlights the critical role of surfactant-assisted monomer diffusion in optimizing membrane structure and performance.
研究领域:
环境工程
·
膜科学与技术
·
材料科学
·
化学工程
·
水处理
✓ 已验证
产品关联
DOI
高影响因子
Food Science and Human Wellness
·
2020
·
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
·
化学工程
·
胶体科学
✓ 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）