期刊文献+
共找到18,498篇文章
< 1 2 250 >
每页显示 20 50 100
Synthesis and Surface Activity of Cashew-Based Anion-Nonionic Surfactants
1
作者 Haiyan Li Jun Wang +3 位作者 Changhuan Liu Jun Han Cuiqin Li Mengmeng Ning 《Open Journal of Applied Sciences》 2012年第2期93-97,共5页
Four novel anion-nonionic surfactants were synthesized using cashew phenol as raw material. The four structures were characterized by IR and elemental analysis. Their surface activities were investigated. Their critic... Four novel anion-nonionic surfactants were synthesized using cashew phenol as raw material. The four structures were characterized by IR and elemental analysis. Their surface activities were investigated. Their critical micelle concentrations (CMC) are 9.30 × 10 –3 mol/L, 8.50 × 10–3 mol/L, 8.10 × 10–3 mol/L and 7.71 ×–3 mol/L respectively, and the corresponding surface tensions at CMC are 28.38 mN/m, 28.60 mN/m, 30.40 mN/m and 30.00 mN/m respectively. The contact angles of the solutions on sheet galsses were measured to observe their surface wettabilities. The effects of their concentrations, the concentrations of NaCl and temperature on their foaming capacity and foam stability were studied. 展开更多
关键词 CASHEW PHENOL anion-nonionic surfactANT Surface Activity CMC
下载PDF
Patent-based technological developments and surfactants application of lithium-ion batteries fire-extinguishing agent 被引量:2
2
作者 Jianqi Zhang Tao Fan +4 位作者 Shuai Yuan Chongye Chang Kuo Wang Ziwei Song Xinming Qian 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2024年第1期39-63,I0002,共26页
While newer,more efficient Lithium-ion batteries(LIBs)and extinguishing agents have been developed to reduce the occurrence of thermal runaway accidents,there is still a scarcity of research focused on the application... While newer,more efficient Lithium-ion batteries(LIBs)and extinguishing agents have been developed to reduce the occurrence of thermal runaway accidents,there is still a scarcity of research focused on the application of surfactants in different LIBs extinguishing agents,particularly in terms of patented technologies.The aim of this review paper is to provide an overview of the technological progress of LIBs and LIBs extinguishing agents in terms of patents in Korea,Japan,Europe,the United States,China,etc.The initial part of this review paper is sort out LIBs technology development in different regions.In addition,to compare LIBs extinguishing agent progress and challenges of liquid,solid,combination of multiple,and microencapsulated.The subsequent section of this review focuses on an in-depth analysis dedicated to the efficiency and challenges faced by the surfactants corresponding design principles of LIBs extinguishing agents,such as nonionic and anionic surfactants.A total of 451,760 LIBs-related patent and 20 LIBs-fire-extinguishing agent-related patent were included in the analyses.The extinguishing effect,cooling performance,and anti-recombustion on different agents have been highlighted.After a comprehensive comparison of these agents,this review suggests that temperature-sensitive hydrogel extinguishing agent is ideal for the effective control of LIBs fire.The progress and challenges of surfactants have been extensively examined,focusing on key factors such as surface activity,thermal stability,foaming properties,environmental friendliness,and electrical conductivity.Moreover,it is crucial to emphasize that the selection of a suitable surfactant must align with the extinguishing strategy of the extinguishing agent for optimal firefighting effectiveness. 展开更多
关键词 LIBS Fire-extinguishing agent surfactants PATENT
下载PDF
Surface activity and cleaning performance of rosin-based quaternary ammonium salt type asymmetric Gemini surfactants
3
作者 Haoyu Feng Yaoqi Pan +4 位作者 Yijia Zhang Zhuofan Zhang Yunye Huang Linxi Hou Longqiang Xiao 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2024年第9期70-80,共11页
Rosin,a renewable and abundant resource,has been extensively processed and chemically modified to endow it with special properties,especially in the surfactant industry.In this study,four rosin-based quaternary ammoni... Rosin,a renewable and abundant resource,has been extensively processed and chemically modified to endow it with special properties,especially in the surfactant industry.In this study,four rosin-based quaternary ammonium asymmetric gemini surfactants(RGS-2-n)with different alkyl chain lengths(n=12,14,16,18)were synthesized using a simple two-step method based on dehydroabietylamine as the raw material.The feasibility of these surfactants for cleaning purposes was comprehensively evaluated,suggesting that the surfactants own high surface activity and good cleaning performance.Furthermore,by successfully introducing the amine group of dehydroabietylamine into the hydrophilic group of the surfactants,we avoided its potential harm to the environment and water pollution.Density functional theory proves rosin-based gemini surfactants with asymmetric structure can further improve cleaning efficiency.Overall,our findings suggests that RGS-2-n surfactants are promising and sustainable candidates for cleaning electric plates,and provide new opportunities for rosin application in the electric industry. 展开更多
关键词 Electronic components Asymmetric gemini surfactants Cleaning performance ROSIN
下载PDF
Recent advances in switchable surfactants for heavy oil production:A review
4
作者 Qi Li Lingfei Liu +1 位作者 Dejun Sun Zhenghe Xu 《Energy Geoscience》 EI 2024年第4期75-88,共14页
Surfactants are extensively employed in the cold production of heavy oil.However,producing heavy oil emulsions using conventional surfactants poses a challenge to spontaneous demulsification,necessitating the addition... Surfactants are extensively employed in the cold production of heavy oil.However,producing heavy oil emulsions using conventional surfactants poses a challenge to spontaneous demulsification,necessitating the addition of demulsifiers for oil-water separation.This inevitably increases the exploitation cost and environmental pollution risk.Switchable surfactants have garnered much attention due to their dual capabilities of underground heavy oil emulsification and surface demulsification.This study focuses on the fundamental working principles and classification of novel switchable surfactants for oil displacement developed in recent years.It offers a comprehensive overview of the latest advances in the applications of switchable surfactants in the fields of enhanced oil recovery(EOR),oil sand washing,and oil-water separation.Furthermore,it highlights the existing challenges and future development directions of switchable surfactants for heavy oil recovery. 展开更多
关键词 Heavy oil Switchable surfactant Cold production EMULSIFICATION DEMULSIFICATION
下载PDF
Synergy Study of Surfactants Common Used in Makeup Remover
5
作者 Zhang Yunmin Dai Jining Wang Suhui 《China Detergent & Cosmetics》 CAS 2024年第4期52-57,共6页
In order to solve the problem of limited makeup removal ability of a single surfactant of Peg-20 glyceryl triisostearate in makeup remover,an efficient system was prepared which contained PEG-20 glyceryl triisostearat... In order to solve the problem of limited makeup removal ability of a single surfactant of Peg-20 glyceryl triisostearate in makeup remover,an efficient system was prepared which contained PEG-20 glyceryl triisostearate and a combination of Sorbeth-30 tetraoleate and Peg-5 glyceryl triisostearate.Leather test,skin colorimeter test and consumer self-evaluation were used to assess the makeup removal ability,rinsing performance and softness skin feel of the efficient makeup remover base.The results showed that a 7%combination of Sorbeth-30 tetraoleate and PEG-5 glyceryl triisostearate could significantly improve the comprehensive performance of single PEG-20 glyceryl triisostearate makeup remover system,furthermore,they performed best at the ratio of 6:1.We hope the findings can have guiding significance for the development of makeup remover products. 展开更多
关键词 makeup removal ability Peg-20 glyceryl triisostearate Sorbeth-30 tetraoleate Peg-5 glyceryl triisostearate surfactANT
下载PDF
Comparative studies on flotation of aluminosilicate minerals with Gemini cationic surfactants BDDA and EDDA 被引量:7
6
作者 黄志强 钟宏 +2 位作者 王帅 夏柳荫 刘广义 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2013年第10期3055-3062,共8页
Gemini quaternary ammonium salt surfactants, butane-a, co-bis(dimethyl dodeculammonium bromide) (BDDA) ethane-a, fl-bis(dimethyl dodeculammonium bromide) (EDDA) were adopted to comparatively study the flotatio... Gemini quaternary ammonium salt surfactants, butane-a, co-bis(dimethyl dodeculammonium bromide) (BDDA) ethane-a, fl-bis(dimethyl dodeculammonium bromide) (EDDA) were adopted to comparatively study the flotation behaviors of kaolinite, pyrophyllite and illite. It was found that three silicate minerals all exhibited good floatability with Gemini cationic surfactants as collectors over a wide pH range, while BDDA showed a stronger collecting power than EDDA. FTIR spectra and zeta potential analysis indicated that the mechanism of adsorption of Gemini collector molecules on three silicate minerals surfaces was almost identical for the electronic attraction and hydrogen bonds effect. The theoretically obtained results of density functional theory (DFT) at B3LYP/6-31G (d) level demonstrated the stronger collecting power of BDDA presented in the floatation test and zeta potential measurement. 展开更多
关键词 aluminosilicate minerals Gemini cationic surfactants reverse flotation adsorption mechanism
下载PDF
Study on Enhancement of PCBs Desorption in Soil by Surfactants 被引量:11
7
作者 黄卫红 李勇 杨岚钦 《Agricultural Science & Technology》 CAS 2010年第1期73-76,共4页
[Objective]The aim of this paper was to provide theoretical basis for study on enhancement of surfactants to desorption of PCBs from soil. [Method]The desorption effects of surfactants SDBs,Tween 80,HTAB on PCBs were ... [Objective]The aim of this paper was to provide theoretical basis for study on enhancement of surfactants to desorption of PCBs from soil. [Method]The desorption effects of surfactants SDBs,Tween 80,HTAB on PCBs were studied as well as their distribution in water and soil. Effects of rationing on desorption of PCBs were also analyzed. [Result]The potential of single surfactant to enhance the desorption of PCBs from soil in order was Tween 80 SDBS HTAB. Three surfactants were largely adsorbed on soil and the sorption followed HTABTween 80SDBS. The desorption of PCBs increased significantly and linearly with the increase of aqueous micelle concentration of surfactants. [Conclusion]Enhancing effect of three surfactants on PCBs desorption were obtained,which will provide theoretical basis for further analyzing. 展开更多
关键词 surfactANT PCBS DESORPTION Aqueous micelle concentration
下载PDF
Effect of surfactants on dispersion property and morphology of nano-sized nickel powders 被引量:1
8
作者 黄国勇 徐盛明 +1 位作者 李林艳 王学军 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2014年第11期3739-3746,共8页
Fine face-centered cubic (FCC) nickel powders were synthesized by liquid phase reduction with different surfactants. The products were investigated by scanning electron microscopy (SEM), laser particle size analyzer a... Fine face-centered cubic (FCC) nickel powders were synthesized by liquid phase reduction with different surfactants. The products were investigated by scanning electron microscopy (SEM), laser particle size analyzer and X-ray powder diffraction (XRD). The results indicate that the type, dosage and relative molecular mass of surfactants significantly impact the purity, dispersion property, particle size, size distribution and morphology of the products. The nonionic surfactants poly ethylene glycol (PEG) and polyethylene glycol sorbitan monostearate (Tween) showed better dispersing ability in the reaction system than the others. The optimal mass ratios of surfactant to Ni are 100 mg/g and 150 mg/g for PEG-600 and Tween-40, respectively. The products obtained in the optimal conditions have ideal morphology and narrow size distribution. Moreover, study on the relative molecular mass effect revealed that with the increase of the relative molecular mass of Tween, the morphology of nickel powders changed from sphere to spiny ball. 展开更多
关键词 nickel powder surfactANT DISPERSION MORPHOLOGY SYNTHESIS
下载PDF
The Influence of Surfactants on Chlorophyll Binding Status and Excitation Energy Transfer in Photosystem Ⅰ of Wheat
9
作者 郁飞 唐崇钦 +5 位作者 辛越勇 彭德川 李良璧 匡廷云 李济云 李振声 《Acta Botanica Sinica》 CSCD 2001年第7期686-692,共7页
Surfactants are widely used in the purification and research of structure and function of the protein complexes in photosynthetic membrane. To elucidate the mechanism of interaction between surfactants and photosystem... Surfactants are widely used in the purification and research of structure and function of the protein complexes in photosynthetic membrane. To elucidate the mechanism of interaction between surfactants and photosystem Ⅰ (PSⅠ), effects of two typical surfactants, Triton X_100 and sodium dodecyl sulfate (SDS) on PSⅠ, were studied at different concentrations. The results were: SDS led to the reduction of apparent absorption intensity and blue shift of absorption peaks; while Triton X_100 led to the decrease of apparent absorption intensity in red region and blue shift of the peak, but to the increase of apparent absorption intensity in blue region. The fourth derivative spectra show that the longwavelength (669 nm and 683 nm) absorbing chlorophyll a was affected greatly and their relative changes of absorbance were axially symmetrical. The presence of surfactant could make the long wavelength fluorescence emission decrease greatly and a new fluorescence peak appeared around 680 nm, it was obvious that the surfactant interceded the transfer of excitation energy from antenna pigments to reaction center. The surfactants might affect the microenvironment of proteins, even the structure of PSⅠ protein subunits and hence changed the binding status of pigments with protein subunits, or the pigments might be released from the subunits. All of these might affect the absorption and the transfer of excitation energy. 展开更多
关键词 surfactANT Photosystem CHLOROPHYLL absorption spectra fluorescence spectra
下载PDF
Explanatory System of Support Vector Regression and Its Application in QSPR of Surfactants
10
作者 谭显胜 金晨钟 +1 位作者 李巍巍 袁哲明 《Agricultural Science & Technology》 CAS 2016年第11期2452-2456,共5页
In order to solve the problem of poor interpretability of support vector re- gression (SVR) applied in quantitative structure-property relationship (QSPR), a com- plete set of explanatory system for SVR was establ... In order to solve the problem of poor interpretability of support vector re- gression (SVR) applied in quantitative structure-property relationship (QSPR), a com- plete set of explanatory system for SVR was established based on F-test, The nov- el explanatory system includes significance tests of model and single-descriptor im- portance, single-descriptor effect and sensitivity analysis, and significance tests of interaction between two descriptors, etc. The results of example indicated that the explanatory results of the new system were consistent well with those of stepwise linear regression model and quadratic polynomial stepwise regression model. The explanatory SVR model will play an important role in regression analysis such as QSPR. 展开更多
关键词 Support vector regression Explanatory system surfactANT Significant test Quantitative structure-property relationship
下载PDF
Synthesis and Surface Activity of Heterogemini Imidazolium Surfactants
11
作者 赵晓辉 叶志文 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2016年第2期249-254,I0002,共7页
A series of heterogemini imidazolium surfactants with two-methylene spacer groups ([Cm- 2-Cnim]Br2, m, n=8, 10, 12, 14, 16; m≠n) have been synthesized and characterized by 1H NMR and ESI-MS spectroscopy. The effect... A series of heterogemini imidazolium surfactants with two-methylene spacer groups ([Cm- 2-Cnim]Br2, m, n=8, 10, 12, 14, 16; m≠n) have been synthesized and characterized by 1H NMR and ESI-MS spectroscopy. The effects of various reaction parameters, including stoichiometry, reaction temperature and time, were investigated. In addition, the surface activity study about heterogemini imidazolium surfactants was carried out and the influences of dissymmetric degree on the surface properties were also discussed. 展开更多
关键词 Heterogemini imidazolium surfactants SYNTHESIS Optimal conditions Surfaceactivity Dissymmetric degree
下载PDF
Capping effect of reducing agents and surfactants in synthesizing silver nanoplates 被引量:3
12
作者 延阳 陈科斌 +3 位作者 李浩然 洪炜 胡晓斌 徐洲 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2014年第11期3732-3738,共7页
The effect of reducing agents and surfactants on controlling the silver nanoplates was studied. Two reducing agents, trisodium citrate dehydrate (TSC) and potassium tartrate, were used to reduce the AgNO3 solution. In... The effect of reducing agents and surfactants on controlling the silver nanoplates was studied. Two reducing agents, trisodium citrate dehydrate (TSC) and potassium tartrate, were used to reduce the AgNO3 solution. In this redox system, polyvinylpyrrolidone (PVP), sodium dodecyl sulfate (SDS) and arabic gum were served as surfactants. The results showed that reducing agents and surfactants both act as the capping agent adhering to the certain facets of silver seeds to block this surface to grow. The relative intensity of reducing agents also takes an active part in influencing the growth rate and direction of silver seeds. It was also found that halides can accelerate the speed of Ostwald ripening by adding Cl?, Br? and I?into the aqueous and have some effects on the morphology of the nanoplates. 展开更多
关键词 silver nanoplates reducing agents surfactants capping effect
下载PDF
Affinity and fluorescent detection of surfactants/ssDNA and single-walled carbon nanotube 被引量:1
13
作者 周姣 李娟萍 +2 位作者 聂钰洪 李继山 杨金凤 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2013年第2期456-461,共6页
A new biosensor platform was explored for detection of surfactant based on fluorescence changes from single strand DNA (ssDNA) and single-walled carbon nanotubes (SWNTs). Thermodynamics assay was performed to valu... A new biosensor platform was explored for detection of surfactant based on fluorescence changes from single strand DNA (ssDNA) and single-walled carbon nanotubes (SWNTs). Thermodynamics assay was performed to value the stability of probe. The affinities of SWNT to five common surfactants (SDS, DBS, Triton X-100, Tween-20 and Tween-80) were investigated by real-time fluorescence method. The effects of Mg^2+ and pH on the fluorescence intensity of self-assembled quenched sensor were performed. The fluorescent emission spectra were used to measure the responses of self-assembled quenched fluorescent of ssDNA/SWNTs to different concentration surfactant(Triton X-100). The FAM-DNA wrapped SWNTs probe was stable in a wide temperature range (5 ℃ to 80℃). The binding strength of surfactants and single-stranded DNA (ssDNA) on SWNTs surfaces was shown as follows: Triton X-100〉DBS〉Tween-20〉Tween-80〉ssDNA〉SDS, and the optimized reaction conditions included pH 7.4 and 10 mmol/L Mg2+. The fluorescence of FAM-ssDNA wrapped SWNTs was proportionally recovered as a result of adding different concentrations of Triton X- 100, which realizes the quantitative detection of Triton X- 100. 展开更多
关键词 single-stranded DNA single-walled carbon nanotubes surfactANT fluorescent sensor AFFINITY
下载PDF
Synthesis and Surface Activity of Novel Triazole-based Cationic Gemini Surfactants 被引量:10
14
作者 Ling Guang QIU An Jian XIE Yu Hua SHEN 《Chinese Chemical Letters》 SCIE CAS CSCD 2003年第6期653-656,共4页
The synthesis and surfactant activities of two new cationic gemini surfactants containing triazole compound as spacer were described. Their critical micelle concentrations (CMC), which are 1.8×10-4 mol/L and 3.9... The synthesis and surfactant activities of two new cationic gemini surfactants containing triazole compound as spacer were described. Their critical micelle concentrations (CMC), which are 1.8×10-4 mol/L and 3.9×10-4 mol/L respectively, are much lower than that of conventional surfactant cetyltrimethyl ammonium chloride (CTAC). In addition, compared with some gemini surfactants containing phenylene, xylylene and stilbenyl as spacer, this new kind of surfactants has good solubility in water at room temperature because of containing more hydrophilic groups or atoms in molecules. 展开更多
关键词 Gemini surfactant cationic surfactant critical micelle concentration TRIAZOLE synthesis.
下载PDF
Influence of surfactants used in surfactant-polymer flooding on the stability of Gudong crude oil emulsion 被引量:12
15
作者 Dong Zhaoxia Lin Meiqin Wang Hao Li Mingyuan 《Petroleum Science》 SCIE CAS CSCD 2010年第2期263-267,共5页
The influences of an anionic-nonionic composite surfactant and petroleum sulfonate, used in surfactant-polymer flooding in Shengli Gudong oilfield, East China, on the interfacial properties of Gudong crude model oil a... The influences of an anionic-nonionic composite surfactant and petroleum sulfonate, used in surfactant-polymer flooding in Shengli Gudong oilfield, East China, on the interfacial properties of Gudong crude model oil and synthetic formation water was studied by measuring interfacial tension, interfacial viscoelasticity and Zeta potential. The in? uence of the surfactants on the stability of Gudong water-in-oil (W/O) and oil-in-water (O/W) emulsions was evaluated by separating water from the W/O emulsion and residual oil in the aqueous phase of the O/W emulsion respectively. The results showed that the two kinds of surfactants, namely anionic-nonionic composite surfactant and petroleum sulfonate, are both able to decrease the interfacial tension between the oil phase and the aqueous phase and increase the surface potential of the oil droplets dispersed in the O/W emulsion, which can enhance the stability of the W/O and O/W crude oil emulsions. Compared with petroleum sulfonate, the anionic-nonionic composite surfactant is more interfacially active and able to enhance the strength of the interfacial film between oil and water, hence enhance the stability of the W/O and O/W emulsions more effectively. 展开更多
关键词 surfactANT Gudong crude oil interfacial properties EMULSION stability
下载PDF
Test for the effects of three surfactants on the penetration ability of the calcium chloride and water glass Solutions in dust 被引量:8
16
作者 Wu Chao, Chen Jun liang, Zhou Bo, Wang Ping long Department of Resources Exploitation Engineering, Central South University of Technology, Changsha 410083, China 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 1998年第4期62-68,共7页
By using a downward penetration testing device, a large number of experiments were made to investigate the effects of surfactants (sodium succinate, sodium dodecyl sulfonate and dodecyl benzene sulfonic acid sodium sa... By using a downward penetration testing device, a large number of experiments were made to investigate the effects of surfactants (sodium succinate, sodium dodecyl sulfonate and dodecyl benzene sulfonic acid sodium salt) on the penetration ability of the calcium chloride and water glass solutions in four dust samples. The experimental results showed that the surfactants can enhance the penetration ability and decrease the surface tension of the calcium chloride and water glass solutions in great extent. After adding the surfactants in 0.2—0.6 wt.% to the solutions of calcium chloride and water glass in 5—25 wt.% respectively, the largest percent of penetration ability increases to 28% more. Among the three surfactants, the size of their effects on the penetration ability of calcium chloride and water solutions in the dust samples is dodecyl benzene sulfonic acid sodium salt, sodium dodecyl sulfonate and sodium succinate.The achieved conclusions are great significant for calcium chloride and water glass to be applied in the field of soil stabilization and raising dust control. 展开更多
关键词 calcium chloride water glass surfactants penetration ability dust.
下载PDF
Enhancement of the imbibition recovery by surfactants in tight oil reservoirs 被引量:9
17
作者 Zhan Meng Sheng-Lai Yang +6 位作者 Yan Cui Zi-Yao Zhong Cheng-Gang Liang Lu Wang Kun Qian Quan-Zheng Ma Jun-Ru Wang 《Petroleum Science》 SCIE CAS CSCD 2018年第4期783-793,共11页
Hydraulic fracturing technology can significantly increase oil production from tight oil formations, but performance data show that production declines rapidly. In the long term, it is necessary to increase the develo... Hydraulic fracturing technology can significantly increase oil production from tight oil formations, but performance data show that production declines rapidly. In the long term, it is necessary to increase the development efficiency of block matrix, surfactant-aided imbibition is a potential way. The current work aimed to explain comprehensively how surfactants can enhance the imbibition rate. Laboratory experiments were performed to investigate the effects of wettability, interfacial tension(IFT), and relative permeability as the key parameters underlying surfactant solution imbibition. Two different types of surfactants, sodium dodecyl sulfate and polyethylene glycol octylphenol ether, at varied concentrations were tested on reservoir rocks. Experimental results showed that the oil recovery rate increased with increased wettability alteration and IFT and decreased residual oil saturation. A mechanistic simulator developed in previous studies was used to perform parametric analysis after successful laboratory-scale validation. Results were proven by parametric studies. This study,which examined the mechanism and factors influencing surfactant solution imbibition, can improve understanding of surfactant-aided imbibition and surfactant screening. 展开更多
关键词 Spontaneous imbibition Tight oil reservoir surfactants Wettability alteration Enhanced oil recovery
下载PDF
Enhanced oil recovery by nonionic surfactants considering micellization, surface, and foaming properties 被引量:8
18
作者 Achinta Bera Ajay Mandal +1 位作者 Hadi Belhaj Tarkeswar Kumar 《Petroleum Science》 SCIE CAS CSCD 2017年第2期362-371,共10页
Surfactants for enhanced oil recovery are important to study due to their special characteristics like foam generation,lowering interfacial tension between oleic and aqueous phases,and wettability alteration of reserv... Surfactants for enhanced oil recovery are important to study due to their special characteristics like foam generation,lowering interfacial tension between oleic and aqueous phases,and wettability alteration of reservoir rock surfaces.Foam is a good mobility control agent in enhanced oil recovery for improving the mobility ratio.In the present work,the foaming behavior of three nonionic ethoxylated surfactants,namely Tergitol 15-S-7,Tergitol 15-S-9,and Tergitol 15-S-12,was studied experimentally.Among the surfactants,Tergitol 15-S-12 shows the highest foamability.The effect of Na Cl concentration and synthetic seawater on foaming behavior of the surfactants was investigated by the test-tube shaking method.The critical micelle concentrations of aqueous solutions of the different nonionic surfactants were measured at 300 K.It was found that the critical micelle concentrations of all surfactants also increased with increasing ethylene oxide number.Dynamic light scattering experiments were performed to investigate the micelle sizes of the surfactants at their respective critical micelle concentrations.Core flooding experiments were carried out in sand packs using the surfactant solutions.It was found tha t22% additional oil was recovered in the case of all the surfactants over secondary water flooding.Tergitol 15-S-12exhibited the maximum additional oil recovery which is more than 26%after water injection. 展开更多
关键词 Enhanced oil recovery Ethylene oxide number Foaming properties surfactant flooding Micellization
下载PDF
Development of Surfactants and Builders in Detergent Formulations 被引量:22
19
作者 于养信 赵瑾 Andrew E. Bayly 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2008年第4期517-527,共11页
Surfactants and builders are the two most important ingredients in laundry, household and personal-care cleaning products. They play a key role in washing processes. The development of various surfactants (e.g., anio... Surfactants and builders are the two most important ingredients in laundry, household and personal-care cleaning products. They play a key role in washing processes. The development of various surfactants (e.g., anionic, nonionic, cationic, zwitterionic, and silicone surfactants) and builders (inorganic, organic and polymeric builders)used in the detergent compositions are reviewed and their detergency performance and biodegradability are discussed. In the future, the development of the surfactants and builders used in detergent compositions should be based on economic and environmental considerations. The use of the eco-friendly surfactants and builders derived from inexpensive renewable resources (e.g., alkyl polyglucosides and bio-based polyesters) in detergent compositions is the developing trends in detergent industry. 展开更多
关键词 DETERGENT surfactANT BUILDER detergency performance BIODEGRADABILITY
下载PDF
Chemical Behavior of Cadmium in Purple Soil as Affected by Surfactants and EDTA 被引量:16
20
作者 CHEN Yu-Cheng XIONG Zhi-Ting DONG Shan-Yan 《Pedosphere》 SCIE CAS CSCD 2006年第1期91-99,共9页
A soil batch experiment was conducted to investigate both separate and compound effects of three types of surfactants: anionic dodecylbenzene sulfonic acid sodiumsalt (DBSS), cationic cetyltrimethylammonium bromide (C... A soil batch experiment was conducted to investigate both separate and compound effects of three types of surfactants: anionic dodecylbenzene sulfonic acid sodiumsalt (DBSS), cationic cetyltrimethylammonium bromide (CTAB), and non-ionic nonyl phenol polyethyleneoxy ether (TX-100), as well as ethylenediaminetetraacetic acid (EDTA) on cadmium solubility, sorption kinetics, and sorption-desorption behavior in purple soil. The results indicated that both individual application of the three types of surfactants and surfactants combined with EDTA could stimulate Cd extraction from the soil with a general effectiveness ranking of EDTA/TX-100 > EDTA/DBSS > EDTA/CTAB > EDTA > TX-100 > DBSS > CTAB. Further study showed that the compound application of surfactants and EDTA had stronger (P < 0.05) effects on Cd solubility than those added individually. The application of surfactants and EDTA to purple soil (P < 0.05) decreased the proportion of Cd sorbed, while their effectiveness ranking was similar to that of enhanced solubilization. The sorption kinetics of Cd in purple soil was best described by the double-constant equation, while the Freundlich equation gave an excellent fit to the sorption isotherm curves. Therefore, surfactant-enhanced remediation of Cd contaminated soil is feasible and further research should be conducted. 展开更多
关键词 CADMIUM DESORPTION EDTA sorption kinetics surfactANT
下载PDF
上一页 1 2 250 下一页 到第
使用帮助 返回顶部