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Fan Y, Wang Y. Deposition and Spread of Aqueous Pesticide Droplets on Hydrophobic/Superhydrophobic Surfaces by Fast Aggregation of Surfactants. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:5631-5640. [PMID: 37053578 DOI: 10.1021/acs.langmuir.3c00282] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
Deposition and spread of aqueous droplets on hydrophobic/superhydrophobic surfaces are of great significance in many practical applications, such as spraying, coating, and printing, and particularly in improving pesticide utilization efficiency because the intrinsic hydrophobicity/superhydrophobicity of most plant leaves results in serious loss of water-based pesticides during spraying. It has been found that proper surfactants can promote the droplet spread on such surfaces. However, most reports involved the effects of surfactants on the spread of the gently released droplets over hydrophobic or highly hydrophobic substrates, while the situation on superhydrophobic substrates has rarely been explored. Moreover, high-speed impact makes it extremely difficult to deposit and spread the aqueous droplets on superhydrophobic surfaces; thus, the deposition and spread have just been achieved by surfactants in recent years. Here, we give an overview concerning the influence factors on the deposition and spreading performance of gently released and high-speed impacted droplets on hydrophobic/superhydrophobic substrates and emphasize the effects of fast aggregation of surfactants at the interface and in solution. We also outline perspectives on the future development of surfactant-assisted deposition and spreading after high-speed impact.
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Affiliation(s)
- Yaxun Fan
- CAS Key Laboratory of Colloid, Interface and Chemical Thermodynamics, CAS Research/Education Center for Excellence in Molecular Sciences and Beijing National Laboratory for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Yilin Wang
- CAS Key Laboratory of Colloid, Interface and Chemical Thermodynamics, CAS Research/Education Center for Excellence in Molecular Sciences and Beijing National Laboratory for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
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2
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Braun L, Engelhardt N, Engert SC, Lichterfeld-Weber N, Oetter G, Raths HC, Tropsch J, Kunz W, Kellermeier M. Alkylether Derivatives of Choline as Cationic Surfactants for the Design of Soluble Catanionic Systems at Ambient Conditions. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.121033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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3
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Kaushik P, Kaur G, Chaudhary GR, Batra U. Tuning the surface using palladium based metallosurfactant for hydrogen evolution reaction. J Colloid Interface Sci 2021; 582:894-905. [PMID: 32919117 DOI: 10.1016/j.jcis.2020.08.090] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 08/03/2020] [Accepted: 08/25/2020] [Indexed: 10/23/2022]
Abstract
Synthesis of a novel electrocatalyst for hydrogen evolution reaction (HER) is highly demanding for renewable energy production. This research reports the design and development of novel palladium based metallosurfactant (PdCPC(I)) that belongs to the unique class of inorganic-organic hybrid with striking structural features that are explored for the first time in the HER. The formation of the micelle, molecular orientation and surface characteristics of the metallosurfactant are calculated by conductivity and contact angle measurements. The reduction of palladium in metallomicelles during electrolysis accelerates the HER. Metallosurfactant makes the substrate hydrophilic, which in turn enhances the activity of the modified substrate. The 269 mV and 400 mV (vs RHE) overpotential is required to achieve the 10 mA cm-2 of current density for PdCPC(I) and CPC, respectively. Tafel slope of PdCPC(I) is 57 mV dec-1, which signifies that the reaction follows the Volmer- Heyrovsky mechanism in the presence of catalyst. The presence of the palladium in the core of the micelle is certified by ICPMS study. The present electrocatalyst also demonstrates 40 h of electrochemical durability. This work opens the doors toward the enhancement of HER, which fulfills the dreams for future energy resources.
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Affiliation(s)
- Pradeep Kaushik
- Department of Chemistry and Centre of Advanced Studies in Chemistry, Panjab University, Chandigarh 160014, India
| | - Gurpreet Kaur
- Department of Chemistry and Centre of Advanced Studies in Chemistry, Panjab University, Chandigarh 160014, India.
| | - Ganga Ram Chaudhary
- Department of Chemistry and Centre of Advanced Studies in Chemistry, Panjab University, Chandigarh 160014, India
| | - Uma Batra
- Department of Materials and Metallurgical Engineering, PEC University of Technology, Chandigarh 160012, India.
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Zhang R, Xing Y, Xia Y, Guo F, Ding S, Tan J, Che T, Meng F, Gui X. Synergistic Adsorption Mechanism of Anionic and Cationic Surfactant Mixtures on Low-Rank Coal Flotation. ACS OMEGA 2020; 5:20630-20637. [PMID: 32832816 PMCID: PMC7439705 DOI: 10.1021/acsomega.0c02948] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Accepted: 07/27/2020] [Indexed: 05/12/2023]
Abstract
Mixed surfactants have a prominent synergistic effect and show advantages in many aspects. In this work, the effects of a mixture of dodecyltrimethylammonium bromide (DTAB) and sodium dodecyl sulfate (SDS) on the flotation of low-rank coal were studied from the wetting rate, contact angle, surface tension, and zeta potential. Furthermore, the adsorption configuration of the mixed surfactant on the surface of oxygen-containing graphite was simulated at the molecular level by molecular dynamics simulation. The experimental results show that the combustible matter recovery of low-rank coal flotation is improved using the mixed surfactant, and the contact angle test and wetting rate test confirmed the synergistic effect of the mixed surfactant. In the mixed surfactant system, the addition of SDS with an opposite charge to DTAB can reduce the mutual repulsion between DTAB molecules and enhance the degree of DTAB alignment in solution, which was analyzed by surface tension and zeta potential tests. Meanwhile, the simulation results reveal the adsorption behavior of anionic and cationic surfactants on the surface of oxygen-containing graphite from the molecular level and also verify the experimental results. This investigation provides a good understanding of the interaction mechanism of mixed surfactants in low-rank coal flotation.
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Affiliation(s)
- Rui Zhang
- Chinese
National Engineering Research Center of Coal Preparation and Purification, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China
- School
of Chemical Engineering and Technology, China University of Mining and
Technology, Xuzhou 221116, Jiangsu, China
| | - Yaowen Xing
- Chinese
National Engineering Research Center of Coal Preparation and Purification, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China
| | - Yangchao Xia
- Chinese
National Engineering Research Center of Coal Preparation and Purification, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China
- School
of Chemical Engineering and Technology, China University of Mining and
Technology, Xuzhou 221116, Jiangsu, China
| | - Fangyu Guo
- Chinese
National Engineering Research Center of Coal Preparation and Purification, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China
- School
of Chemical Engineering and Technology, China University of Mining and
Technology, Xuzhou 221116, Jiangsu, China
| | - Shihao Ding
- Chinese
National Engineering Research Center of Coal Preparation and Purification, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China
- School
of Chemical Engineering and Technology, China University of Mining and
Technology, Xuzhou 221116, Jiangsu, China
| | - Jinlong Tan
- School
of Chemistry and Environmental Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China
| | - Tao Che
- Yanzhou
Coal Mining Company Limited, Zoucheng 273500, Shandong, China
| | - Fancai Meng
- Yanzhou
Coal Mining Company Limited, Zoucheng 273500, Shandong, China
| | - Xiahui Gui
- Chinese
National Engineering Research Center of Coal Preparation and Purification, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China
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Superspreading on Hydrophobic Substrates: Effect of Glycerol Additive. COLLOIDS AND INTERFACES 2019. [DOI: 10.3390/colloids3020051] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The spreading of solutions of three trisiloxane surfactants on two hydrophobic substrates, polyethylene and polyvinylidenefluoride, was studied with the addition of 0–40 mass % of glycerol. It was found that all the surfactant solutions spread faster than silicone oil of the same viscosity, confirming the existence of a mechanism which accelerates the spreading of the surfactant solutions. For the non-superspreading surfactant, BT-233, addition of glycerol improved the spreading performance on polyvinylidenefluoride and resulted in a transition from partial to complete wetting on polyethylene. The fastest spreading was observed for BT-233 at a concentration of 2.5 g/L, independent of glycerol content. For the superspreading surfactants, BT-240 and BT-278, the concentration at which the fastest spreading occurs systematically increased with concentration of glycerol on both substrates from 1.25 g/L for solutions in water to 10 g/L for solutions in 40% glycerol/water mixture. Thus, the surfactant equilibration rate (and therefore formation of surface tension gradients) and Marangoni flow are important components of a superspreading mechanism. De-wetting of the solutions containing glycerol, once spread on the substrates, resulted in the formation of circular drop patterns. This is in contrast to the solely aqueous solutions where the spread film shrank due to evaporation, without any visible traces being left behind.
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Alp G, Aydogan N. Enhancing the Spreading Behavior on Pulmonary Mucus Mimicking Subphase via Catanionic Surfactant Solutions: Toward Effective Drug Delivery through the Lungs. Mol Pharm 2018; 15:1361-1370. [DOI: 10.1021/acs.molpharmaceut.8b00086] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Arjmandi-Tash O, Kovalchuk NM, Trybala A, Kuchin IV, Starov V. Kinetics of Wetting and Spreading of Droplets over Various Substrates. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:4367-4385. [PMID: 28190350 DOI: 10.1021/acs.langmuir.6b04094] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
There has been a substantial increase in the number of publications in the field of wetting and spreading since 2010. This increase in the rate of publications can be attributed to the broader application of wetting phenomena in new areas. It is impossible to review such a huge number of publications; that is, some topics in the field of wetting and spreading are selected to be discussed below. These topics are as follows: (i) Contact angle hysteresis on smooth homogeneous solid surfaces via disjoining/conjoining pressure. It is shown that the hysteresis contact angles can be calculated via disjoining/conjoining pressure. The theory indicates that the equilibrium contact angle is closer to a static receding contact angle than to a static advancing contact angle. (ii) The wetting of deformable substrates, which is caused by surface forces action in the vicinity of the apparent three-phase contact line, leading to a deformation on the substrate. (iii) The kinetics of wetting and spreading of non-Newtonian liquid (blood) over porous substrates. We showed that in spite of the enormous complexity of blood, the spreading over porous substrate can be described using a relatively simple model: a power low-shear-thinning non-Newtonian liquid. (iv) The kinetics of spreading of surfactant solutions. In this part, new results related to various surfactant solution mixtures (synergy and crystallization) are discussed, which shows some possible direction for the future revealing of superspreading phenomena. (v) The kinetics of spreading of surfactant solutions over hair. Fundamental problems to be solved are identified.
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Affiliation(s)
- Omid Arjmandi-Tash
- Deparment of Chemical Engineering, Loughborough University , Loughborough LE11 3TU, U.K
| | - Nina M Kovalchuk
- Deparment of Chemical Engineering, Loughborough University , Loughborough LE11 3TU, U.K
- Institute of Biocolloid Chemistry , Kiev 03142, Ukraine
| | - Anna Trybala
- Deparment of Chemical Engineering, Loughborough University , Loughborough LE11 3TU, U.K
| | - Igor V Kuchin
- Deparment of Chemical Engineering, Loughborough University , Loughborough LE11 3TU, U.K
- Institute of Physical Chemistry and Electrochemistry RAS , Moscow 119071, Russia
| | - Victor Starov
- Deparment of Chemical Engineering, Loughborough University , Loughborough LE11 3TU, U.K
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8
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Effect of adsorption of catanionic surfactant mixtures on wettability of quartz surface. Colloids Surf A Physicochem Eng Asp 2016. [DOI: 10.1016/j.colsurfa.2016.09.057] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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9
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Kinetics of spreading of synergetic surfactant mixtures in the case of partial wetting. Colloids Surf A Physicochem Eng Asp 2016. [DOI: 10.1016/j.colsurfa.2015.11.026] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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10
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Kovalchuk NM, Trybala A, Arjmandi-Tash O, Starov V. Surfactant-enhanced spreading: Experimental achievements and possible mechanisms. Adv Colloid Interface Sci 2016; 233:155-160. [PMID: 26282600 DOI: 10.1016/j.cis.2015.08.001] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2015] [Revised: 08/04/2015] [Accepted: 08/04/2015] [Indexed: 11/18/2022]
Abstract
Surfactants are broadly used to improve wetting properties of aqueous formulations. The improvement is achieved by essential reduction of liquid/air and solid/liquid interfacial tensions resulting in the decrease of contact angle. For moderately hydrophobic substrates, there is a range of surfactants providing complete wetting of substrate. With the decrease of substrate surface energy, this range of surfactants reduces very quickly and only trisiloxane surfactant solutions are capable to wet completely such highly hydrophobic substrates as polypropylene and parafilm. That is why these surfactants are referred to as superspreaders. The most intriguing feature of wetting surfactant solutions is their ability to spread much faster than pure liquids with spread area, S, being proportional to time, t, S~t, as compared to S~t(0.2) for pure liquids, which wet completely the solid substrate. Trisiloxane surfactant solutions spread faster than other aqueous surfactant solutions, which also provide complete wetting, being superspreaders in the sense of spreading rate as well. The mechanism of fast spreading of surfactant solutions on hydrophobic substrates and much higher spreading rates for trisiloxane solutions are to be explained. Below the available experimental data on superspreading and surfactant-enhanced spreading are analysed/summarised, and possible mechanisms governing the fast spreading are discussed.
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Affiliation(s)
- N M Kovalchuk
- Department of Chemical Engineering, Loughborough University, Loughborough, UK; Institute of Biocolloid Chemistry, Kiev, Ukraine
| | - A Trybala
- Department of Chemical Engineering, Loughborough University, Loughborough, UK
| | - O Arjmandi-Tash
- Department of Chemical Engineering, Loughborough University, Loughborough, UK
| | - V Starov
- Department of Chemical Engineering, Loughborough University, Loughborough, UK.
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11
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Kovalchuk NM, Matar OK, Craster RV, Miller R, Starov VM. The effect of adsorption kinetics on the rate of surfactant-enhanced spreading. SOFT MATTER 2016; 12:1009-1013. [PMID: 26610693 DOI: 10.1039/c5sm02493e] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A comparison of the kinetics of spreading of aqueous solutions of two different surfactants on an identical substrate and their short time adsorption kinetics at the water/air interface has shown that the surfactant which adsorbs slower provides a higher spreading rate. This observation indicates that Marangoni flow should be an important part of the spreading mechanism enabling surfactant solutions to spread much faster than pure liquids with comparable viscosities and surface tensions.
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Affiliation(s)
- N M Kovalchuk
- Imperial College London, South Kensington Campus, London SW7 2AZ, UK and Institute of Biocolloid Chemistry, Kiev 03142, Ukraine
| | - O K Matar
- Imperial College London, South Kensington Campus, London SW7 2AZ, UK
| | - R V Craster
- Imperial College London, South Kensington Campus, London SW7 2AZ, UK
| | - R Miller
- Max Planck Institute of Colloids and Interfaces, Golm, D-14424, Germany
| | - V M Starov
- Loughborough University, Loughborough, LE 11 3TU, UK.
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12
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Kovalchuk N, Barton A, Trybala A, Starov V. Mixtures of catanionic surfactants can be superspreaders: Comparison with trisiloxane superspreader. J Colloid Interface Sci 2015; 459:250-256. [DOI: 10.1016/j.jcis.2015.08.024] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2015] [Revised: 08/12/2015] [Accepted: 08/12/2015] [Indexed: 11/28/2022]
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13
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Emborsky CP, Cox KR, Chapman WG. Exploring parameter space effects on structure-property relationships of surfactants at liquid-liquid interfaces. J Chem Phys 2011; 135:084708. [DOI: 10.1063/1.3628452] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
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14
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Wang Z, Wu T, Zhou W, Wei X, Zhao J. Surface Properties and Micellar Molecular Interaction in Binary Systems of a Biosurfactant Sodium Deoxycholate (NaDC) with Conventional Surfactants. J SURFACTANTS DETERG 2010. [DOI: 10.1007/s11743-010-1242-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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15
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Interactions Between an Anionic Fluorosurfactant and a PEO-PPO-PEO Triblock Copolymer in Aqueous Solutions. J SURFACTANTS DETERG 2009. [DOI: 10.1007/s11743-009-1135-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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