TENSIDE SURFACTANTS DETERGENTS
·
2024
·
IF 1.2
Weiwei Han,Hongmiao Lv,Jiabao Fan,Taotao Qiang,Chenwei Liu,Yue Ji,Sanbao Dong
Foamers with high resistance to condensate, salinity and high temperature play a crucial role in gas well deliquification. In this study, we developed an efficient foaming mixture containing a Gemini surfactant (CAGB), a betaine surfactant (CAPB) and sodium lauroyl glutamate (SLG), which exhibited excellent foaming performance (at a molar ratio of 3:3:4 and a dosage of 20 mmol L −1 ) with a foam volume of 440 mL and a half-life of 11 min. The optimized CAGB/CAPB/SLG mixture showed exceptional liquid unloading and foaming ability under high methanol (up to 40 vol.%) and condensate (up to 50 vol.%) content conditions. Trisodium aminotriacetate (NTA) facilitated the liquid unloading performance at a salinity of 90 g L −1 . With 10 vol.% methanol, the liquid unloading rate of CAGB/CAPB/SLG foam at 90 °C could be increased to 90 %. Furthermore, surface tension and morphology analysis confirmed the presence of synergy within the CAGB/CAPB/SLG mixture in foaming, foam stabilizing and liquid unloading ability.
研究领域:
石油工程
·
化学工程
·
表面科学
✓ 已验证
产品关联
DOI
高影响因子
CRYSTAL GROWTH & DESIGN
·
2019
·
IF 4.153
Dandan Han,Tarak Karmakar,Fei Liu,Yan Wang,Weiwei Tang,Junbo Gong
Pyridoxine hydrochloride, commonly known as vitamin B6 (VB6), is considered to be one of the most essential vitamin enhancers. Understanding its crystal morphology is of paramount interest in the pharmaceutical industry. Herein, we systematically investigate the crystallization of VB6 in the absence and presence of 0.5–2 mM nonionic and ionic surfactants by single-crystal growth experiments and theoretical calculations. VB6 crystals exhibit the most common blocklike morphology in aqueous and nonionic surfactant solution, while needlelike crystals are observed, for the first time, in ionic surfactant solutions. Two surfaces, (100) and (010), play a decisive role in modulating the crystal morphology. The preferential adsorption of anionic sodium dodecyl sulfate surfactant on the radial (010) surface inhibiting its growth over the axial (100) surface results in a high aspect ratio of the crystals. On the other hand, the cationic hexadecyl trimethylammonium bromide surfactant enhances the growth of both surfaces by promoting Cl– ion integration to the surfaces. The zwitterionic dodecyl dimethyl betaine surfactant hinders (010) surface growth by surface adsorption while it promotes (100) surface growth by accelerating Cl– integration. In addition, a slight growth inhibition of both surfaces by the nonionic surfactant Tween 80 is due to surfactant crowding on the growing surfaces.
研究领域:
药学
·
晶体学
·
生物化学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2017
·
IF 2.714
Han Jia,Xu Leng,Mei Hu,Yilei Song,Hongyan Wu,Peng Lian,Yipu Liang,Yanguang Zhu,Jingping Liu,Hongtao Zhou
A mixed cationic surface-active ionic liquid/anionic surfactant system consisting of N -dodecyl- N -methylpyrrolidinium bromide (L12) and sodium dodecyl sulfate (SDS) was used for chemical enhanced oil recovery (EOR). The mixed L12/SDS surfactant system could cause remarkable effects on the interfacial tension (IFT) between water and a model oil (toluene and n -decane, v:v = 1:1), and the strength of the effect depended on the L12/SDS molar ratio. The effects of temperature and salinity on the IFT were systematically investigated to verify the mechanism of the mixed surfactants at the interface. Moreover, the mixed L12/SDS surfactant system showed the desired ability to reduce the IFT of water/crude oil, greatly improving oil recovery with the assistance of a polymer in core flooding tests.
研究领域:
石油工程
·
化学工程
·
界面科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
·
2024
·
IF 1.9
Yuting Yang,Zhen Dong,Guofeng Zhang,Huaqi Zhang,Yongbin Zou,Xue Hao,Zhiwen Ye
A series of newly structured two-tailed cationic surfactants were synthesized via a carbonyl amine condensation reaction aimed at reducing the bioaccumulation of conventional surfactants while maintaining their excellent surface properties. Long-chain alkyl amine compounds can be reversibly converted into charged surfactants through CO2/H2O treatment and an alkyl chain length of between C8 and C12. The structures were characterized by IR,1H NMR and 13C NMR. The main surface activity parameters of the surfactants, containing cmc, γcmc pC20, cmc/С20, Γm and Αmin, were determined. The switching properties of N’-alkyl-N, N-dimethylalkamidine bicarbonate and N, N-dimethyl-N-alkylamidine bicarbonate were demonstrated by investigating their conductivities in solution and carrying out their emulsification-emulsion-breaking experiment.
研究领域:
化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
WATER RESEARCH
·
2022
·
IF 13.4
Jia Wen,Lisha Yang
Knowledge of the fate and transport of metal-organic frameworks (MOFs) in porous media is essential to understanding their environmental impacts. However, to date, the transport mechanisms of MOFs are not fully revealed. Meanwhile, surfactants can promote MOFs dispersion by forming a stable suspension. They also allow MOFs to migrate in the aqueous environment, which would increase the risks of MOFs being exposed to human health and the ecological environment. In this study, the effect of surfactants type and nanoparticle (NP) concentrations (50, 100, and 200 mg/L) were investigated using a sand column to study the transportability of ZIF-8 NPs in saturated porous media. Surfactants used were categorized into three groups, including cationic surfactants (CTAB, DTAB), anionic surfactants (SDBS, SDS), and nonionic surfactants (Tween 80, Tween 20). Experimental results showed that the ionic surfactants significantly increased the transportability of ZIF-8 NPs. Furthermore, a low concentration of NPs tended to break through the column under ionic surfactant conditions, and the maximum effluent recovery of ZIF-8 NPs (50 mg/L) was 87.4% in the presence of SDS. Nevertheless, ZIF-8 NPs tended to deposit in the inlet of the sand column in the presence of nonionic surfactants due to hydrodynamic bridging and straining. This research provides a comprehensive understanding of the deposition mechanism of ZIF-8 NPs as affected by surfactant types and NP concentrations. Most importantly, the study highlights those ionic surfactants had a significant impact on the mobility of ZIF-8 NPs, which arouses attention to the ecological and human health risk assessment related to the manufacturing of MOFs with the aid of various dispersing agents.
研究领域:
环境科学
·
纳米技术
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2015
·
IF 2.037
Aili Wang,Li Chen,Fan Xu,Zongcheng Yan
Castor oil-based ionic liquid microemulsions are promising alternatives for petroleum-based biolubricant basestocks. This study presents the phase behavior of castor oil-based ionic liquid microemulsions through phase manifestation, and the areas of the single-phase domain (SME) were calculated accordingly to further illustrate the phase-forming capacities of the designed microemulsions. The results indicated that the phase-forming capacities of castor oil-based ionic liquid microemulsions depended largely on the ionic liquid ions, surfactant types, and cosurfactant chain lengths. The SME of different anion-based ionic liquid microemulsions showed the following sequences: [BMIM][Tf2N]-based > [BMIM][PF6]-based > [BMIM][BF4]-based. The longer carbon chain of ionic liquid cations in single surfactant-based systems and the larger percentage of ionic liquid-based surfactant in mixed surfactants-based systems both gave rise to the phase-forming capacities of castor oil-based ionic liquid microemulsions. Given the presence of ionic liquid–castor oil amphiphilic balance in the designed systems, the castor oil–surfactant micelles achieved maximum solubilization capacity for [BMIM][BF4] when the ethoxylated groups’ number of surfactant was about eight in single surfactant microemulsion. In addition, n-hexanol donated a higher phase-forming capacity than n-butanol, while n-octanol brought about a different phase behavior due to the spontaneous curvature effect and oil nature of long-chain alcohols (C ≥ 7) in the castor-oil based ionic liquid microemulsions. Thus, this study presented useful information for formulating optimum castor oil-based ionic liquid microemulsion biolubricants based on different ionic liquids, surfactants, and cosurfactants, which were not evaluated in previous research.
研究领域:
化学工程
·
材料科学
·
生物技术
✓ 已验证
DOI
高影响因子
JOURNAL OF SURFACTANTS AND DETERGENTS
·
2018
·Vol. 21
·期 3
·313-322
·
IF 1.454
Baochuan Wang,Jun Liu,Xiaona Han,Fengdi Li,Zhengjun Li,Qinhuan Yang
2 bola-type collagen hydrolysate-based siloxane surfactants (CBES) were prepared via grafting of an epoxy-terminated polydimethylsiloxane oligomer onto 2 collagen hydrolysates with different molecular weights. Their structure was characterized by Fourier transform infrared spectroscopy (FTIR) and proton nuclear magnetic resonance ( 1 H NMR) spectroscopy, and the degree of grafting was determined by calculating the free amino content, which confirmed the successful synthesis of CBES. Subsequently, their physicochemical properties, such as particle size and isoelectric point, were evaluated. Besides, surface activities, application functionalities, and biodegradability of CBES were investigated. The results showed that CBES-1, prepared with the lower-molecular-weight collagen hydrolysate, possessed superior surface activity, excellent foaming ability, and good emulsifying capacity comparable to those of a typical emulsifier such as the fatty alcohol polyoxyethylene ether (AEO-9). In addition, their BOD 5 /COD Cr value and CO 2 evolution demonstrated that the CBES are readily biodegradable. There is, therefore, great potential for the bola-type CBES to be applied in fields such as leather treatment and textile industries.
研究领域:
材料科学
·
生物学
✓ 已验证
DOI
高影响因子
FOOD CHEMISTRY
·
2014
·
IF 3.259
Jin Feng,Ying Chen,Xin Liu,Songbai Liu
Novel strategy of Gemini-like modification has been applied in development of new nonionic surfactants, tea saponin esters, with enhanced surface activity by simple esterification. Tea saponin was treated with acyl chlorides of different chain length and different ratio of tea saponin and acyl chloride under alkaline condition. The structures of tea saponin esters were analysed and confirmed by FT-IR, NMR and ESI-MS. Surface activity investigation revealed that esterification with the chain length of C12 and C14 and the ratio of 1:4 to 1:6 produced superior surface activity compared with tea saponin. The exceptional surface activity of the new surfactants suggested their great potential application in food industry as green surfactants due to their environmental benign nature as well as simple and inexpensive preparation. The strategy of Gemini-like modification will facilitate development of green surfactants based on natural resources.
研究领域:
化学
·
环境科学
·
食品科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2022
·
IF 6.633
Yutang Zhou,Yong Jin,Yichao Shen,Liangjie Shi,Long Bai,Rong Zhou
Achieving wide variation ranges and various adjusting modes of the performances for surfactant mixtures is still a significant challenge which limits the extensive application of surfactant mixtures. Herein, we reported the physicochemical properties and performances of hydrocarbon/fluorocarbon surfactant mixtures constituted with an anionic hydrocarbon surfactant, sodium dodecyl sulfate (SDS), and a tri-block nonionic short-chain fluorocarbon surfactant (F 9 EG 13 F 9 ). Meanwhile, the effects of Li + and Mg 2+ on them were investigated. The surface tension and contact angle measurements were adopted to reflect the surface activity and wetting ability of SDS/F 9 EG 13 F 9 mixtures. The data showed that the surface tensions at the critical micelle concentrations and the contact angles on polytetrafluoroethylene film of these surfactant mixtures are 33.5–21.4 mN/m and 118.0–58.7°, respectively, which indicates that their surface activity and wetting ability possess wide variation ranges. Furthermore, the micellization, adsorption and thermodynamics behaviors of mixed surfactants were also analyzed using a series of theoretical parameters based on the regular solution theory, Clint’s model, Maeda’s model, etc. The results approved that Li + and Mg 2+ immensely reduce the electrostatic repulsion effect of SDS and increase the adsorption of SDS at phase interfaces to enhance mixed monolayer packing, in which the effect of Mg 2+ is stronger than that of Li + . Thus, precisely adjustable surface activity and wetting ability can be realized by changing the molar ratio and adding the different cations, which enables SDS/F 9 EG 13 F 9 mixtures to possess tunable performances to meet various practical application requirements.
研究领域:
物理化学
·
表面科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2022
·
IF 6.633
Difei Han,Jincheng Mao,Jinzhou Zhao,Heng Zhang,Dingli Wang,Chen Wang,Jinxing Xue,Huimin Cao,Xiaojiang Yang,Chong Lin,Yang Zhang,Meitao Fu
Hydrogen bond shaping plays a very important role in the stability of emulsions and cannot be ignored when developing highly stable emulsions. Mixed systems of anionic and cationic surfactants can greatly reduce interfacial tension. In this study, we introduced different amounts of hydroxyl groups in Gemini surfactant spacers through dissipative particle dynamics simulations and evaluated the effect on the oil–water interface. In addition, Gemini cationic surfactants were mixed with anionic surfactants and the emulsification effect of the mixed system was evaluated, as well as the effect on the emulsion-formation and emulsion-breaking processes. We found that the anionic and cationic surfactants have a strong synergistic effect that significantly reduces interfacial tension and effectively transforms the oil–water interface into an emulsion state, but the effect of the interaction between the anion and the cation is affected by the spacer group. This work provides theoretical guidance and ideas for designing efficient emulsifiers and improving emulsion stability in the future.
研究领域:
化学工程
·
材料科学
·
界面科学
✓ 已验证
DOI
高影响因子
JOURNAL OF SURFACTANTS AND DETERGENTS
·
2021
·Vol. 24
·期 6
·923-931
·
IF 1.902
Yun Li,Danyang Sun,Chenhui Jiang,Haiyan Ding,Quanjie Wang
Polypeptide surfactants with different lengths of hydrophilic groups and lipophilic groups were synthesized from collagen hydrolysate polypeptides by the Schotten-Baumann reaction. Collagen hydrolysate polypeptides were prepared through alkaline hydrolysis of chromium-containing leather wastes, followed by changing the molecular weight of the collagen hydrolysate and the carbon chain length of the acid chloride. Fourier transform infrared spectroscopy, confirmed the successful synthesis of the polypeptide surfactants. Furthermore, surface activities of surfactants were tested to reflect the influence of the length of hydrophilic and lipophilic groups on properties, such as surface tension, foamability, foam stability, wettability, and Hydrophile–Lipophile Balance value. The results indicated that for surfactants prepared from collagen hydrolysate, a shorter hydrophilic group length resulted in lower surface tension and better foamability, foam stability, and a wetting ability which indicates the surfactants can be used as wetting agents. In contrast, the surfactant with a greater lipophilic group length had lower surface tension and poorer foamability, foam stability, and wetting ability. The presence of the C=C bond of the oleoyl lipophilic group decreased surface tension. The polypeptide surfactants prepared from collagen hydrolysate not only can effectively utilize chromium-containing leather solid waste produced, but also avoid environmental pollution and promote the sustainable development of the leather industry.
研究领域:
生物化学
·
环境科学
·
皮革工业
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2019
·
IF 3.375
Shifeng Gao,Zhaozheng Song,Fang Lan,Peng Li,Anhe Zhang,Jianju Hu,Qingzhe Jiang
Two pairs of betaine surfactants with the same hydrophobic moieties but different hydrophilic headgroups, including alkylbetaine surfactants (ACB12 and ASB12) and phenyl-containing betaine surfactants (BCB10 and BSB10), were synthesized, and their chemical structures were confirmed by ESI-HRMS, 1H NMR, and 13C NMR. Their surface activities and aggregate morphologies were also systematically investigated. Phenyl-containing betaine surfactants exhibit better surface activities than alkylbetaine surfactants, including higher short-term thermal stabilities, lower critical micelle concentrations (CMC) and surface tensions, and greater tendencies of adsorption and aggregation. The minimum interfacial tension (IFTmin) of BSB10 and BCB10 solution against Xinjiang crude oil achieved an ultralow value (10–3 mN/m), while the IFTmin only reached a 100–10–1 mN/m order of magnitude for ASB12 and ACB12. In addition, phenyl-containing betaine surfactants displayed considerably higher wetting ability than alkylbetaine surfactants, while the contact angles of BSB10 and BCB10 solution on a paraffin film decreased to 31.89 and 25.19°, respectively. Moreover, DLS and cryo-TEM measurements verified that phenyl-containing betaine surfactant molecules could spontaneously form vesicles in an aqueous solution above the CMC, while alkylbetaine surfactant molecules only aggregate into small micelles in the solution. The BSB10 and BCB10 molecules could further assemble into larger vesicles with increasing surfactant concentration.
研究领域:
化学
·
材料科学
·
石油工程
✓ 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）