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Eftekhari M, Schwarzenberger K, Karakashev SI, Grozev NA, Eckert K. Oppositely charged surfactants and nanoparticles at the air-water interface: Influence of surfactant to nanoparticle ratio. J Colloid Interface Sci 2024; 653:1388-1401. [PMID: 37801849 DOI: 10.1016/j.jcis.2023.09.038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Revised: 08/18/2023] [Accepted: 09/06/2023] [Indexed: 10/08/2023]
Abstract
HYPOTHESIS The interactions between oppositely charged nanoparticles and surfactants can significantly influence the interfacial properties of the system. Traditionally, in the study of such systems, the nanoparticle concentration is varied while the surfactant concentration is kept constant, or vice versa. However, we believe that a defined variation of both components' concentration is necessary to accurately assess their effects on the interfacial properties of the system. We argue that the effect of nanoparticle-surfactant complexes can only be properly evaluated by keeping the surfactant to nanoparticle ratio constant. EXPERIMENTS Zeta potential, dynamic light scattering, high amplitude surface pressure and surface tension measurements are employed synergistically to characterize the interfacial properties of the nanoparticle-surfactant system. Interferometric experiments are performed to highlight the effect of surface concentration on the stability of thin liquid films. FINDINGS The interfacial properties of surfactant/nanoparticle mixtures are primarily determined by the surfactant/nanoparticle ratio. Below a certain ratio, free surfactant molecules are removed from the solution by the formation of surfactant-nanoparticle complexes. Surprisingly, even though the concentration and hydrophobicity of these complexes do not seem to have a noticeable impact on the surface tension, they do significantly affect the rheological properties of the interface. Above this ratio, free surfactant monomers and nanoparticle-surfactant complexes coexist and can co-adsorb at the interface, changing both the interfacial tension and the interfacial rheology, and thus, for example, the foamability and foam stability of the system.
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Affiliation(s)
- Milad Eftekhari
- Institute of Fluid Dynamics, Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany; Institute of Process Engineering and Environmental Technology, Technische Universität Dresden, Germany.
| | - Karin Schwarzenberger
- Institute of Fluid Dynamics, Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany; Institute of Process Engineering and Environmental Technology, Technische Universität Dresden, Germany
| | | | - Nikolay A Grozev
- Department of Physical Chemistry, Sofia University, Sofia, Bulgaria
| | - Kerstin Eckert
- Institute of Fluid Dynamics, Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany; Institute of Process Engineering and Environmental Technology, Technische Universität Dresden, Germany
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Kumar S, Ganguly R, Nath S, Aswal VK. Pluronic Induced Interparticle Attraction and Re-entrant Liquid-Liquid Phase Separation in Charged Silica Nanoparticle Suspensions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023. [PMID: 37269303 DOI: 10.1021/acs.langmuir.3c00491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Tuning surface properties of nanoparticles by introducing charge, surface functionalization, or polymer grafting is central to their stability and applications. Here, we show that introducing non-DLVO forces like steric and hydrophobic effects in charged silica nanoparticle suspensions through interaction with a nonionic surfactant brings about interesting modulations in their interparticle interaction and phase behavior. The Ludox TM-40 negatively charged silica suspensions thus exhibit liquid-liquid phase separation driven by the onset of interparticle attraction in the system in the presence of the triblock copolymer Pluronic P123. The observed phase separations are thermoresponsive in nature, as they are associated with lower consolute temperatures and a re-entrant behavior as a function of temperature. The nanoparticle-Pluronic system thus undergoes transformation from one-phase to two-phase and then back to one-phase with monotonic increase in temperature. Evolution of the interparticle interaction in the composite system is investigated by dynamic light scattering (DLS), small angle neutron scattering (SANS), zeta potential, rheological, and fluorescence spectroscopy studies. Zeta potential studies show that the charge interaction in the system is partially mitigated through adsorption of a Pluronic micellar layer on the nanoparticle surfaces. Contrast-matching SANS studies suggest that hydrophobic interactions between the adsorbed micellar layer bring about the onset of interparticle attraction in the system. The results are unique and not reported hitherto in charged silica nanoparticle systems.
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Affiliation(s)
- S Kumar
- Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - R Ganguly
- Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - S Nath
- Radiation and Photochemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - V K Aswal
- Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
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Wang T, Yin Q, Huang HY, Wang Z, Song H, Luo X. Probiotic Escherichia coli Nissle 1917 propelled micro-robot with pH sensitivity for hypoxia targeted intestinal tumor therapy. Colloids Surf B Biointerfaces 2023; 225:113277. [PMID: 36996630 DOI: 10.1016/j.colsurfb.2023.113277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2023] [Revised: 03/17/2023] [Accepted: 03/21/2023] [Indexed: 03/30/2023]
Abstract
Poor drug penetration in hypoxia area of solid tumor is a big challenge for intestinal tumor therapy and thus it is crucial to develop an effective strategy to overcome this challenge. Compared with other bacteria used for construction of hypoxia targeted bacteria micro-robot, the Escherichia coli Nissle 1917 (EcN) bacteria are nonpathogenic Gram-negative probiotic and can especially target and identify the signal molecules in the hypoxic region of tumor, and thus, in this study, we choose EcN to construct a bacteria propelled micro-robot for targeting intestinal tumor therapy. Firstly, the MSNs@DOX with average diameter of 200 nm were synthesized and conjugated with EcN bacteria using EDC/NHS chemical crosslinking method to construct a EcN propelled micro-robot. The motility of micro-robot was then evaluated and the motion velocity of EcN-pMSNs@DOX was 3.78 µm/s. Compared with pMSNs@DOX without EcN driven, EcN bacteria propelled micro-robot transported much more pMSNs@DOX into the inner of HCT-116 3D multicellular tumor spheroids. However, the EcN bacteria are non-intracelluar bacteria which lead to the micro-robot can not directly enter into tumor cells. Therefore, we utilized acid-labile linkers of cis-aconitic amido bone to link EcN with MSNs@DOX nanoparticles to achieve the pH sensitive separation of EcN with MSNs@DOX from the micro-robot. At 4 h of incubation, the isolated MSNs@DOX began to enter into the tumor cells through CLSM observation. In vitro live/dead staining results show that EcN-pMSNs@DOX induced much more cell death than pMSNs@DOX at 24 and 48 h of incubation with HCT-116 tumor cells in acid culture media (pH 5.3). For the validation of the therapeutic efficacy of the micro-robot for intestinal tumor, we established the HCT-116 subcutaneous transplantation tumor model. After 28 days of treatment, EcN-pMSNs@DOX dramatically inhibit tumor growth with tumor volume was around 689 mm3, induce much more tumor tissues necrosis and apoptosis. Finally, the toxicity of this micro-robot was investigated by pathological analysis the liver and heart tissues. We expect that the pH sensitive EcN propelled micro-robot here we constructed may be a safe and feasible strategy for intestinal tumor therapy.
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Moulik SP, Chakraborty I, Rakshit AK. Role of surface‐active materials (amphiphiles and surfactants) in the formation of nanocolloidal dispersions, and their applications. J SURFACTANTS DETERG 2022. [DOI: 10.1002/jsde.12612] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Satya Priya Moulik
- Center for Surface Science, Department of Chemistry Jadavpur University Kolkata India
| | | | - Animesh Kumar Rakshit
- Indian Society for Surface Science and Technology, Department of Chemistry Jadavpur University Kolkata India
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Thongkam M, Woramongkolchai S, Saowsupa S, Rungrojchaipon P. A Facile Method to Synthesize b-Oriented Silicalite-1 Thin Film. MEMBRANES 2022; 12:membranes12050520. [PMID: 35629846 PMCID: PMC9147600 DOI: 10.3390/membranes12050520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Revised: 05/03/2022] [Accepted: 05/08/2022] [Indexed: 02/04/2023]
Abstract
Silicalite-1 thin film was prepared with the following batch composition—3TPAOH:25TEOS:1450H2O:100EtOH—and synthesized using the hydrothermal technique. Silicalite-1 colloidal crystals were successfully coated on the surface of the silica substrate by the dip-coating method. The investigation of silicalite-1 thin film with organic structure-directing agents (SDA), using a seeding technique with various colloidal seed concentrations, number of dip-coating steps, and crystallization time, were systematically discussed and obtained interesting results. Silicalite-1 powder and Silicalite-1 membrane, the patterns of which showed a unique characteristic crystallography of MFI topology, were characterized by XRD, which indicated the preferred orientation along the b-axis perpendicular to the substrate surface. The morphology and crystal size aspect of Silicalite-1 were also examined by a scanning electron microscope (SEM).
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Affiliation(s)
- Montree Thongkam
- Department of Chemistry, Faculty of Science, King Mongkut’s Institute of Technology Ladkrabang, Ladkrabang, Bangkok 10520, Thailand; (M.T.); (S.W.)
| | - Somsak Woramongkolchai
- Department of Chemistry, Faculty of Science, King Mongkut’s Institute of Technology Ladkrabang, Ladkrabang, Bangkok 10520, Thailand; (M.T.); (S.W.)
| | - Sairoong Saowsupa
- Department of Curriculum and Instruction, Faculty of Education, Chulalongkorn University, Bangkok 10330, Thailand;
| | - Pesak Rungrojchaipon
- Department of Chemistry, Faculty of Science, King Mongkut’s Institute of Technology Ladkrabang, Ladkrabang, Bangkok 10520, Thailand; (M.T.); (S.W.)
- Correspondence:
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Obma A, Hemwech P, Phoolpho S, Bumrungpuech R, Wirasate S, Kaowphong S, Wilairat P, Chantiwas R. Silica nanolayer coated capillary by hydrothermal sol-gel process for amines separation and detection of tyramine in food products. Sci Rep 2022; 12:7460. [PMID: 35523909 PMCID: PMC9076594 DOI: 10.1038/s41598-022-11078-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Accepted: 04/18/2022] [Indexed: 11/30/2022] Open
Abstract
A hydrothermal sol–gel method for reproducible formation of silica nanolayer on the wall of silica capillaries was developed for electrochromatography. The formulation was optimized by observation of uniform gel formation on an optical microscope. The variables of the formulation include types of solvent, water-TEOS ratio, CTAB and urea contents, and mixing method. The procedure produced a coating of silica ca. 100 nm thick layer on the wall of the capillary. Surface morphology of the coating was characterized by SEM, contact angle and chemical composition by FT-IR spectroscopy and X-ray powder diffraction. The coating reduced the electroosmotic mobility producing enhanced separation performance. Eight standard amines (including tyramine and benzhydrylamine, as an internal standard) were separated with peak resolution Rs ≥ 2 for all adjacent peaks and plate number N ≥ 3.0 × 104 m-1. Calibration was linear from 5 to 200 µg L-1, with r2 > 0.9985 and instrumental LOD of 4.9 μg L-1. Five samples of food products were diluted and analyzed for the amines using the coated capillary and only tyramine was detected. Intra-day and inter-day precisions were less than 1.2%RSD. Percent recoveries of spiked tyramine in samples were 95 ± 3 to 106 ± 7% (n = 3).
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Affiliation(s)
- Apinya Obma
- Department of Chemistry, Faculty of Science, Mahidol University, Rama VI Rd., Bangkok, 10400, Thailand.,Center of Excellence for Innovation in Chemistry and Flow Innovation-Research for Science and Technology Laboratories (FIRST Labs), Faculty of Science, Mahidol University, Rama VI Rd., Bangkok, 10400, Thailand
| | - Pattamaporn Hemwech
- Department of Chemistry, Faculty of Science, Mahidol University, Rama VI Rd., Bangkok, 10400, Thailand.,Center of Excellence for Innovation in Chemistry and Flow Innovation-Research for Science and Technology Laboratories (FIRST Labs), Faculty of Science, Mahidol University, Rama VI Rd., Bangkok, 10400, Thailand
| | - Sittisak Phoolpho
- Department of Chemistry, Faculty of Science, Mahidol University, Rama VI Rd., Bangkok, 10400, Thailand.,Center of Excellence for Innovation in Chemistry and Flow Innovation-Research for Science and Technology Laboratories (FIRST Labs), Faculty of Science, Mahidol University, Rama VI Rd., Bangkok, 10400, Thailand
| | - Rawiwan Bumrungpuech
- Department of Chemistry, Faculty of Science, Mahidol University, Rama VI Rd., Bangkok, 10400, Thailand.,Center of Excellence for Innovation in Chemistry and Flow Innovation-Research for Science and Technology Laboratories (FIRST Labs), Faculty of Science, Mahidol University, Rama VI Rd., Bangkok, 10400, Thailand
| | - Supa Wirasate
- Department of Chemistry, Faculty of Science, Mahidol University, Rama VI Rd., Bangkok, 10400, Thailand.,Center for Surface Science and Engineering and Rubber Technology Research Center, Faculty of Science, Mahidol University, Salaya, Nakhon Pathom, 73170, Thailand
| | - Sulawan Kaowphong
- Department of Chemistry and Environmental Science Research Center (ESRC), Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand
| | - Prapin Wilairat
- Analytical Sciences and National Doping Test Institute, Mahidol University, Rama VI Rd., Bangkok, 10400, Thailand
| | - Rattikan Chantiwas
- Department of Chemistry, Faculty of Science, Mahidol University, Rama VI Rd., Bangkok, 10400, Thailand. .,Center of Excellence for Innovation in Chemistry and Flow Innovation-Research for Science and Technology Laboratories (FIRST Labs), Faculty of Science, Mahidol University, Rama VI Rd., Bangkok, 10400, Thailand.
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Laguta AN, Mchedlov-Petrossyan NO, Bogatyrenko SI, Kovalenko SM, Bunyatyan ND, Trostianko PV, Karbivskii VL, Filatov DY. Interaction of aqueous suspensions of single-walled oxidized carbon nanotubes with inorganic and organic electrolytes. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2021.117948] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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8
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Chen H. Critical Packing Density of Water-Mediated Nonstick Self-Assembled Monolayer Coatings. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:439-445. [PMID: 34941271 DOI: 10.1021/acs.langmuir.1c02803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Nanoparticle-mineral surface interactions are relevant in many biological and geological applications. We have previously studied nanoparticle coatings based on closely packed bicomponent polyol-fluoroalkane self-assembled monolayers (SAMs) that can have tunable stickiness on calcite surfaces by changing the compositions of fluoroalkanes in SAMs, where the coatings show nonstick properties if fluoroalkanes can effectively perturb hydration layers on calcite surfaces. However, when applying coatings on nanoparticles, it can be challenging to predict the maximum achievable coating density. Here, we study how would water-mediated SAM-calcite interactions change with different SAM coating densities. Molecular dynamics simulations show that compositionally repulsive, closely packed polyol-fluoroalkane SAMs become adhesive to calcite surfaces with decreasing coating densities. Our modeling shows that this results from the collapsing of fluoroalkanes into the voids of SAMs, where fluoroalkanes can no longer perturb hydration layers on calcite surfaces. Interestingly, we find that the nonstick-stick transition occurs when the volume fractions of the voids on SAMs are greater than the volume fractions of hydrophilic coating molecules.
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Affiliation(s)
- Hsieh Chen
- Aramco Americas: Aramco Research Center-Boston, Cambridge, Massachusetts 02139, United States
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9
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Bertin M, Gomes Rodrigues D, Pierlot C, Albert-Mercier C, Davy C, Lambertin D, Nardello-Rataj V. Influence of cetyltrimethylammonium bromide and hydroxide ions on the interfacial tension and stability of emulsions of dodecane in aqueous silicate solutions. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.127306] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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10
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Pryazhnikov DV, Kubrakova IV. Surface-Modified Magnetic Nanoscale Materials: Preparation and Study of Their Structure, Composition, and Properties. JOURNAL OF ANALYTICAL CHEMISTRY 2021. [DOI: 10.1134/s1061934821060095] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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11
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Banerjee M, Panjikar PC, Bhutia ZT, Bhosle AA, Chatterjee A. Micellar nanoreactors for organic transformations with a focus on “dehydration” reactions in water: A decade update. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.132142] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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12
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Schneid ADC, Silveira CP, Galdino FE, Ferreira LF, Bouchmella K, Cardoso MB. Colloidal Stability and Redispersibility of Mesoporous Silica Nanoparticles in Biological Media. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:11442-11449. [PMID: 32880180 DOI: 10.1021/acs.langmuir.0c01571] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The outreach of nanoparticle-based medical treatments has been severely hampered due to the imbalance between the efforts in designing extremely complex materials and the general lack of studies devoted to understanding their colloidal stability in biological environments. Over the years, the scientific community has neglected the relevance related to the nanoparticles' colloidal state, which consequently resulted in very poor bench-to-clinic translation. In this work, we show how mesoporous silica nanoparticles (MSNs, one of the most promising and tested drug delivery platforms) can be efficiently synthesized and prepared, resulting in a colloidally stable system. We first compared three distinct methods of template removal of MSNs and evaluated their ultimate colloidal stability. Then, we also proposed a simple way to prevent aggregation during the drying step by adsorbing BSA onto MSNs. The surface modification resulted in colloidally stable particles that are successfully redispersed in biologically relevant medium while retaining high hemocompatibility and low cytotoxicity.
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Affiliation(s)
| | | | - Flávia Elisa Galdino
- Instituto de Quı́mica (IQ), Universidade Estadual de Campinas (UNICAMP), Caixa Postal 6154, CEP 13083-970 Campinas, São Paulo, Brasil
| | | | - Karim Bouchmella
- Institut Charles Gerhardt Montpellier, UMR-5253 Univ Montpellier, CNRS, ENSCM, cc 1701, Place Eugène Bataillon, 34095 Montpellier Cedex 05, France
| | - Mateus Borba Cardoso
- Instituto de Quı́mica (IQ), Universidade Estadual de Campinas (UNICAMP), Caixa Postal 6154, CEP 13083-970 Campinas, São Paulo, Brasil
- Pós Graduação em Biotecnociência, Universidade Federal do ABC, CEP 09210-580 Santo André, Brasil
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Saman N, Othman NS, Chew LY, Mohd Setapar SH, Mat H. Cetyltrimethylammonium bromide functionalized silica nanoparticles (MSN) synthesis using a combined sol-gel and adsorption steps with enhanced adsorption performance of oxytetracycline in aqueous solution. J Taiwan Inst Chem Eng 2020. [DOI: 10.1016/j.jtice.2020.07.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Li D, Zhong Y, Zhu X, Wang H, Yang W, Deng Y, Huang W, Peng P. Enhanced reactivity of iron monosulfide towards reductive transformation of tris(2-chloroethyl) phosphate in the presence of cetyltrimethylammonium bromide. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 262:114282. [PMID: 32155549 DOI: 10.1016/j.envpol.2020.114282] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Revised: 02/26/2020] [Accepted: 02/26/2020] [Indexed: 06/10/2023]
Abstract
Tris(2-chloroethyl) phosphate (TCEP) is a widely found emerging pollutant due to its heavy usage as a flame retardant. It is chemically stable and is very difficult to removal from water. The goal of this study was to explore whether iron monosulfide (FeS) can be used for reductive transformation of TCEP as FeS can react with a variety of halogenated organic contaminants. We used batch reactor systems to quantify the transformation reactions in the absence and presence of cetyltrimethylammonium bromide (CTAB, a common surfactant in aquatic environments). The results showed that, in the presence of CTAB (100 mg L-1), FeS exhibited much greater reactivity towards TCEP as 93% of initial TCEP had been transformed within 14 d of reaction. In the absence of CTAB, it required 710 d of reaction to achieve 97.3% reduction of initial TCEP. The enhancement of CTAB on TCEP transformation rate could be due to the facts that CTAB could stabilize FeS suspension against aggregation, protect FeS from rapid oxidation, and increase surface adsorption of TCEP on FeS. XPS analysis showed that both Fe(II) and S(-II) species on the FeS surface were involved in the reductive transformation of TCEP. Analysis of transformation products revealed that TCEP was reductively transformed into bis(2-chloroethyl) phosphate (BCEP), Cl- and C2H4. These findings showed that FeS may play an important role in the reductive transformation of TCEP when TCEP coexisting with CTAB in aquatic environments.
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Affiliation(s)
- Dan Li
- State Key Laboratory of Organic Geochemistry, Guangdong Provincial Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Wushan, Guangzhou, 510640, China; University of Chinese Academy of Sciences, Beijing, 100049, China; School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan, 523808, China
| | - Yin Zhong
- State Key Laboratory of Organic Geochemistry, Guangdong Provincial Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Wushan, Guangzhou, 510640, China.
| | - Xifen Zhu
- State Key Laboratory of Organic Geochemistry, Guangdong Provincial Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Wushan, Guangzhou, 510640, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Heli Wang
- State Key Laboratory of Organic Geochemistry, Guangdong Provincial Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Wushan, Guangzhou, 510640, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Weiqiang Yang
- State Key Laboratory of Organic Geochemistry, Guangdong Provincial Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Wushan, Guangzhou, 510640, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yirong Deng
- State Key Laboratory of Organic Geochemistry, Guangdong Provincial Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Wushan, Guangzhou, 510640, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Weilin Huang
- Department of Environmental Sciences, Rutgers, The State University of New Jersey, 14 College Farm Road, New Brunswick, NJ, 08901, USA
| | - Ping'an Peng
- State Key Laboratory of Organic Geochemistry, Guangdong Provincial Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Wushan, Guangzhou, 510640, China
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Llamas S, Ponce Torres A, Liggieri L, Santini E, Ravera F. Surface properties of binary TiO2 - SiO2 nanoparticle dispersions relevant for foams stabilization. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2019.05.023] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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16
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Kékicheff P. The long-range attraction between hydrophobic macroscopic surfaces. Adv Colloid Interface Sci 2019; 270:191-215. [PMID: 31277036 DOI: 10.1016/j.cis.2019.06.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Revised: 06/04/2019] [Accepted: 06/05/2019] [Indexed: 10/26/2022]
Abstract
Direct measurements of the long-range strongly attractive force observed between macroscopic hydrophobic surfaces across aqueous solutions are reexamined in light of recent experiments and theoretical developments. The focus is on systems in the absence of submicroscopic bubbles (preexistent or induced) to avoid capillary bridging forces. Other possible interferences to the measurements are also eliminated. The force-distance profiles are obtained directly (no contributions from electrical double layer or hydrodynamics) between symmetric identical hydrophobic surfaces, overall charge-neutral, at the thermodynamic equilibrium and in a quenched state. Therefore in the well-defined geometry of crossed-cylinders, sphere-flat, or sphere-sphere, there is no additional interaction to be considered except the ever-present dispersion forces, negligible at large separations. For the three main categories of substrates rendered hydrophobic, namely surfaces obtained with surfactant monolayers physically adsorbed from solution to deposited ones, and substrates coated with a hydrophobizing agent bonded chemically onto the surface, the interaction energy scales as A exp (-2κD)/2κD at large separations, with measured decay lengths in accord with theoretical predictions, simply being half the Debye screening length, κ-1/2, at least in non vanishing electrolyte. Taken together with the prefactor A scaling as the ionic strength, the interaction energy is demonstrated to have an electrostatic origin in all the systems. Thanks to our recent SFAX coupling force measurements with x-ray solution scattering under controlled nano-confinement, the microstructuration of the adsorbed film emerges as an essential feature in the molecular mechanism for explaining the observed attraction of larger magnitude than dispersion forces. The adsorption of pairs of positive and negative ions on small islands along the interface, the fluctuation of the surface charge density around a zero mean-value with desorption into or adsorption from the electrolyte solution, the correlations in the local surface ion concentrations along the surfaces, the redistribution of counterions upon intersurface variation, all contribute and are tuned finely by the inhomogeneities and defects present in the hydrophobic layers. It appears that the magnitude of the interacting energy can be described by a single master curve encompassing all the systems.
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Kékicheff P, Contal C. Cationic-Surfactant-Coated Mica Surfaces below the Critical Micellar Concentration: 1. Patchy Structures As Revealed by Peak Force Tapping AFM Mode. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:3087-3107. [PMID: 30691263 DOI: 10.1021/acs.langmuir.8b03781] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The morphology and structure of the self-assembled surfactant aggregates at the solid-liquid interface remain controversial. For the well-studied system of cationic cetyltrimethylammonium bromide (C16TAB) adsorbed onto the opposite negatively charged, atomically smooth mica surface, a variety of surface aggregates have been previously reported: AFM imaging pointing to cylinders and surface micelles as opposed to mono/bilayer-like structures revealed by neutron and X-ray reflectometry, NMR, spectroscopic techniques, and numerical simulations. To reconcile with the latter results, we revisit the morphometry of the C16TAB-coated mica surfaces using the recent peak force tapping (PFT-AFM) mode that allows fragile structures to be imaged with the lowest possible applied force. The evolution of the structural organization at the mica-water interface is investigated above the Krafft boundary over a wide concentration range (from 1/1000 to 2 cmc) after long equilibration times to ensure thermodynamic equilibrium. A complex but fairly complete picture has emerged: At very low concentrations, the C16TAB surfactants adsorb as isolated molecules before forming small clusters. Above 1/140 cmc, monolayer-like stripes are formed. As the concentration is increased, a connected network of these patches progressively covers the mica substrate. Above 1/80 cmc, bilayer-like patches build on top of the underlying monolayer, and ultimately a complete bilayer (at about half the cmc) covers the entire mica substrate. Thanks to the less invasive PFT-AFM imaging mode, our observations not only agree with the theoretical predictions and numerical simulations but also reconcile, at last, the direct observations by means of the AFM imaging technique with the results obtained with other techniques.
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Affiliation(s)
- Patrick Kékicheff
- Université de Strasbourg, CNRS Institut Charles Sadron , 23 rue du Loess , 67034 Strasbourg Cedex 2, France
| | - Christophe Contal
- Université de Strasbourg, CNRS Institut Charles Sadron , 23 rue du Loess , 67034 Strasbourg Cedex 2, France
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18
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Xi W, Haes AJ. Elucidation of HEPES Affinity to and Structure on Gold Nanostars. J Am Chem Soc 2019; 141:4034-4042. [DOI: 10.1021/jacs.8b13211] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Wenjing Xi
- Department of Chemistry, University of Iowa, Iowa City, Iowa 52242, United States
| | - Amanda J. Haes
- Department of Chemistry, University of Iowa, Iowa City, Iowa 52242, United States
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19
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Raj SI, Jaiswal A, Uddin I. Tunable porous silica nanoparticles as a universal dye adsorbent. RSC Adv 2019; 9:11212-11219. [PMID: 35520267 PMCID: PMC9063403 DOI: 10.1039/c8ra10428j] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Accepted: 04/03/2019] [Indexed: 01/14/2023] Open
Abstract
Here, we report selective adsorption of cationic dyes methylene blue (MB) and rhodamine B (RB) and anionic dyes methyl orange (MO) and bromo cresol green (BCG) by modifying the surface of cetyl trimethyl ammonium bromide (CTAB) coated porous silica nanoparticles (PSN). We used a top down approach to synthesize PSN (porous silica nanoparticles) without high temperature calcination. X-ray diffraction study confirms the formation of pure phase silica nanoparticles. SEM analysis reveals that the particle morphology is spherical and the size range lies in-between 150–200 nm. We have studied the dye adsorption properties for three cases of PSN at varying calcination temperatures of 100 °C, 250 °C and 500 °C, respectively. Thermal study has been performed in the temperature range of 50–800 °C to check the calcination temperature. In this report, we have tuned the surface properties for selective adsorption of cationic and anionic dyes in water. In the first case, 100 °C calcined PSN selectively adsorb only anionic dyes, whereas in the second case, 500 °C calcined PSN adsorb only cationic dyes and finally, an optimized calcination temperature ≈250 °C could be used for all types of dye to be adsorbed irrespective of charges on the dyes. The mode of interaction of dyes with PSN has been explained with a proper mechanism in all three cases. The adsorptions of dyes are confirmed by UV-Vis spectroscopy. Adsorption capacity and regenerable performance of adsorbents have also been studied. Adsorption of cationic and anionic dyes (A) MO, (B) BCG, (C) RB, and (D) MB by optimized calcined porous silica nanoparticles.![]()
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Affiliation(s)
- S. Irudhaya Raj
- Department of Chemistry
- Indira Gandhi National Tribal University
- Amarkantak
- India
| | - Adhish Jaiswal
- Department of Chemistry
- Indira Gandhi National Tribal University
- Amarkantak
- India
| | - Imran Uddin
- Interdisciplinary Nanotechnology Centre
- Z.H. College of Engineering & Technology
- Aligarh Muslim University
- Aligarh
- India
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20
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Barman SC, Hossain MF, Park JY. Soft surfactant-assisted uniformly dispersed platinum nanoparticles for high performance electrochemical non-enzymatic glucose sensing platform. J Electroanal Chem (Lausanne) 2018. [DOI: 10.1016/j.jelechem.2018.07.028] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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21
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Vatanparast H, Shahabi F, Bahramian A, Javadi A, Miller R. The Role of Electrostatic Repulsion on Increasing Surface Activity of Anionic Surfactants in the Presence of Hydrophilic Silica Nanoparticles. Sci Rep 2018; 8:7251. [PMID: 29740036 PMCID: PMC5940767 DOI: 10.1038/s41598-018-25493-7] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2017] [Accepted: 04/22/2018] [Indexed: 11/22/2022] Open
Abstract
Hydrophilic silica nanoparticles alone are not surface active. They, however, develop a strong electrostatic interaction with ionic surfactants and consequently affect their surface behavior. We report the interfacial behavior of n-heptane/anionic-surfactant-solutions in the presence of hydrophilic silica nanoparticles. The surfactants are sodium dodecyl sulfate (SDS) and dodecyl benzene sulfonic acid (DBSA), and the diameters of the used particles are 9 and 30 nm. Using experimental tensiometry, we show that nanoparticles retain their non-surface-active nature in the presence of surfactants and the surface activity of surfactant directly increases with the concentration of nanoparticles. This fact was attributed to the electrostatic repulsive interaction between the negatively charged nanoparticles and the anionic surfactant molecules. The role of electrostatic repulsion on increasing surface activity of the surfactant has been discussed. Further investigations have been performed for screening the double layer charge of the nanoparticles in the presence of salt. Moreover, the hydrolysis of SDS molecules in the presence of silica nanoparticles and the interaction of nanoparticles with SDS inherent impurities have been studied. According to our experimental observations, silica nanoparticles alleviate the effects of dodecanol, formed by SDS hydrolysis, on the interfacial properties of SDS solution.
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Affiliation(s)
- Hamid Vatanparast
- Institute of Petroleum Engineering, College of Engineering, University of Tehran, Tehran, Iran. .,IOR Research Institute (IORI), Tehran, Iran.
| | - Farshid Shahabi
- Institute of Petroleum Engineering, College of Engineering, University of Tehran, Tehran, Iran
| | - Alireza Bahramian
- Institute of Petroleum Engineering, College of Engineering, University of Tehran, Tehran, Iran.
| | - Aliyar Javadi
- Institute of Petroleum Engineering, College of Engineering, University of Tehran, Tehran, Iran
| | - Reinhard Miller
- Max-Planck-Institute for Colloid and Interface Science, D-14476, Golm, Germany
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22
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Emulsion behavior control and stability study through decorating silica nano-particle with dimethyldodecylamine oxide at n-heptane/water interface. Chem Eng Sci 2018. [DOI: 10.1016/j.ces.2018.01.005] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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23
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Tian G, Chen L, Liu R, Ge G. Size-dependent adsorption and its application in determining the number of surfactant molecule adsorbed on multimodal SiO2 particles by 2D-DCS. Analyst 2018; 143:4630-4637. [DOI: 10.1039/c8an01068d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
One and two-layered adsorption of CTAB molecules onto silica NPs with multi-modal dispersion is quantitatively determined by 2D-DCS.
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Affiliation(s)
- Guolan Tian
- CAS Key Laboratory of Standardization and Measurement for Nanotechnology
- CAS Center for Excellence in Nanoscience
- National Center for Nanoscience and Technology
- Beijing 100190
- China
| | - Lan Chen
- CAS Key Laboratory of Standardization and Measurement for Nanotechnology
- CAS Center for Excellence in Nanoscience
- National Center for Nanoscience and Technology
- Beijing 100190
- China
| | - Renxiao Liu
- CAS Key Laboratory of Standardization and Measurement for Nanotechnology
- CAS Center for Excellence in Nanoscience
- National Center for Nanoscience and Technology
- Beijing 100190
- China
| | - Guanglu Ge
- CAS Key Laboratory of Standardization and Measurement for Nanotechnology
- CAS Center for Excellence in Nanoscience
- National Center for Nanoscience and Technology
- Beijing 100190
- China
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24
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Kirby SM, Anna SL, Walker LM. Effect of surfactant tail length and ionic strength on the interfacial properties of nanoparticle-surfactant complexes. SOFT MATTER 2017; 14:112-123. [PMID: 29214259 DOI: 10.1039/c7sm01806a] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Mixed nanoparticle-surfactant systems are effective foam stabilizing agents, but the lack of colloidal stability of the bulk dispersions makes interfacial characterization challenging. This study investigates the adsorption of CnTAB/SiO2 complexes at air/water interfaces through surface tension and interfacial rheology measurements. The effects of surfactant tail length, ionic strength, and interfacial processing on the surface properties are measured utilizing a bulk reservoir exchange methodology to avoid bulk destabilization. The surfactant structure controls the surface tension of the system, but has minimal impact on particle surface coverage or interfacial mechanics. Once adsorbed, nanoparticles remain pinned at the surface, while the surfactant is able to desorb upon bulk exchange with deionized water. Particle packing on the interface governs the interfacial mechanics, which can be modified by increasing the ionic strength of the bulk solution. Fully rigid interfaces can be generated at low particle coverages by controlling the ionic strength and interfacial processing. These findings contribute to the understanding of mixed particle-surfactant systems and inform formulation and process design to achieve the desired interfacial mechanical properties.
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Affiliation(s)
- Stephanie M Kirby
- Department of Chemical Engineering, Center for Complex Fluids Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA.
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25
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Schmitt M, Limage S, Denoyel R, Antoni M. Effect of SPAN80 on the structure of emulsified aqueous suspensions. Colloids Surf A Physicochem Eng Asp 2017. [DOI: 10.1016/j.colsurfa.2016.11.027] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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26
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Lv Q, Li Z, Li B, Shi D, Zhang C, Li B. Silica nanoparticles as a high-performance filtrate reducer for foam fluid in porous media. J IND ENG CHEM 2017. [DOI: 10.1016/j.jiec.2016.09.020] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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27
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Surface modification of silica nanoparticles using phenyl trimethoxy silane and their dispersion stability in N-methyl-2-pyrrolidone. Colloids Surf A Physicochem Eng Asp 2016. [DOI: 10.1016/j.colsurfa.2016.04.060] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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28
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Mixed Systems Based on Erucyl Amidopropyl Betaine and Nanoparticles: Self-Organization and Rheology. J SURFACTANTS DETERG 2015. [DOI: 10.1007/s11743-015-1743-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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29
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Vibrational spectroscopy at electrolyte/electrode interfaces with graphene gratings. Nat Commun 2015; 6:7593. [PMID: 26123807 PMCID: PMC4491813 DOI: 10.1038/ncomms8593] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2014] [Accepted: 05/22/2015] [Indexed: 11/08/2022] Open
Abstract
Microscopic understanding of physical and electrochemical processes at electrolyte/electrode interfaces is critical for applications ranging from batteries, fuel cells to electrocatalysis. However, probing such buried interfacial processes is experimentally challenging. Infrared spectroscopy is sensitive to molecule vibrational signatures, yet to approach the interface three stringent requirements have to be met: interface specificity, sub-monolayer molecular detection sensitivity, and electrochemically stable and infrared transparent electrodes. Here we show that transparent graphene gratings electrode provide an attractive platform for vibrational spectroscopy at the electrolyte/electrode interfaces: infrared diffraction from graphene gratings offers enhanced detection sensitivity and interface specificity. We demonstrate the vibrational spectroscopy of methylene group of adsorbed sub-monolayer cetrimonium bromide molecules and reveal a reversible field-induced electrochemical deposition of cetrimonium bromide on the electrode controlled by the bias voltage. Such vibrational spectroscopy with graphene gratings is promising for real time and in situ monitoring of different chemical species at the electrolyte/electrode interfaces. Understanding of electrolyte-electrode interfaces is limited due to the lack of suitable probing techniques. Here, the authors present a vibrational spectroscopy based on graphene gratings, which enables sensitive and interface-specific detection of molecular vibrations at electrolyte-electrode interfaces.
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30
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Probing structure in submicronic aqueous assemblies of emulsified microemulsions and charged spherical colloids using SANS and cryo-TEM. J Colloid Interface Sci 2015; 446:114-21. [DOI: 10.1016/j.jcis.2015.01.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2014] [Revised: 01/06/2015] [Accepted: 01/06/2015] [Indexed: 11/17/2022]
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31
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Lesov I, Tcholakova S, Denkov N. Factors controlling the formation and stability of foams used as precursors of porous materials. J Colloid Interface Sci 2014; 426:9-21. [DOI: 10.1016/j.jcis.2014.03.067] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2013] [Revised: 02/14/2014] [Accepted: 03/28/2014] [Indexed: 11/28/2022]
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32
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Schmitt M, Limage S, Grigoriev DO, Krägel J, Dutschk V, Vincent-Bonnieu S, Miller R, Antoni M. Transition from spherical to irregular dispersed phase in water/oil emulsions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:4599-4604. [PMID: 24593776 DOI: 10.1021/la404766w] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Bulk properties of transparent and dilute water in paraffin oil emulsions stabilized with sodium dodecyl sulfate (SDS) are analyzed by optical scanning tomography. Each scanning shot of the considered emulsions has a precision of 1 μm. The influence of aluminum oxide nanoparticles in the structure of the water droplets is investigated. Depending on concentrations of SDS and nanoparticles, a transition occurs in their shape that changes from spherical to polymorphous. This transition is controlled by the SDS/alumina nanoparticles mixing ratio and is described using an identification procedure of the topology of the gray level contours extracted from each images. The transition occurs for a critical mixing ratio of Rcrit ≈ 0.05 which does not significantly depend on temperature and electrolyte concentration. This structural change seems to be a general feature when emulsifying dispersions and most probably involves both interfacial and bulk phenomena.
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Affiliation(s)
- M Schmitt
- Aix-Marseille Université , CNRS, MADIREL UMR 7246, 13397 Marseille cedex 20, France
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33
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Lozhechnikova A, Dax D, Vartiainen J, Willför S, Xu C, Österberg M. Modification of nanofibrillated cellulose using amphiphilic block-structured galactoglucomannans. Carbohydr Polym 2014; 110:163-72. [PMID: 24906743 DOI: 10.1016/j.carbpol.2014.03.087] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2014] [Revised: 03/25/2014] [Accepted: 03/26/2014] [Indexed: 10/25/2022]
Abstract
Nanofibrillated cellulose (NFC) and hemicelluloses have shown to be highly promising renewable components both as barrier materials and in novel biocomposites. However, the hydrophilic nature of these materials restricts their use in some applications. In this work, the usability of modified O-acetyl galactoglucomannan (GGM) for modification of NFC surface properties was studied. Four GGM-block-structured, amphiphilic derivatives were synthesized using either fatty acids or polydimethylsiloxane as hydrophobic tails. The adsorption of these GGM derivatives was consecutively examined in aqueous solution using a quartz crystal microbalance with dissipation monitoring (QCM-D). It was found that the hydrophobic tails did not hinder adsorption of the GGM derivatives to cellulose, which was concluded to be due to the presence of the native GGM-block with high affinity to cellulose. The layer properties of the adsorbed block-co-polymers were discussed and evaluated. Self-standing NFC films were further prepared and coated with the GGM derivatives and the effect of the surface modification on wetting properties and oxygen permeability (OP) of the modified films was assessed.
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Affiliation(s)
- Alina Lozhechnikova
- Department of Forest Products Technology, School of Chemical Technology, Aalto University, P.O. Box 16300, FI-0076 Aalto, Finland
| | - Daniel Dax
- Process Chemistry Centre, c/o Laboratory of Wood and Paper Chemistry, Åbo Akademi University, Porthansgatan 3, FI-20500 Åbo/Turku, Finland.
| | - Jari Vartiainen
- VTT Technical Research Centre of Finland, Biologinkuja 7, P.O. Box 1000, FI-02044 Espoo, Finland
| | - Stefan Willför
- Process Chemistry Centre, c/o Laboratory of Wood and Paper Chemistry, Åbo Akademi University, Porthansgatan 3, FI-20500 Åbo/Turku, Finland
| | - Chunlin Xu
- Process Chemistry Centre, c/o Laboratory of Wood and Paper Chemistry, Åbo Akademi University, Porthansgatan 3, FI-20500 Åbo/Turku, Finland; Wallenberg Wood Science Center, KTH, The Royal Institute of Technology, SE-10044 Stockholm, Sweden
| | - Monika Österberg
- Department of Forest Products Technology, School of Chemical Technology, Aalto University, P.O. Box 16300, FI-0076 Aalto, Finland.
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34
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Kubrakova IV, Koshcheeva IY, Pryazhnikov DV, Martynov LY, Kiseleva MS, Tyutyunnik OA. Microwave synthesis, properties and analytical possibilities of magnetite-based nanoscale sorption materials. JOURNAL OF ANALYTICAL CHEMISTRY 2014. [DOI: 10.1134/s1061934814020087] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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35
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Pryazhnikov DV, Kubrakova IV, Kiseleva MS, Martynov LY, Koshcheeva IY. Preparation and structural characterization of nanosized magnetic solid-phase extractants. MENDELEEV COMMUNICATIONS 2014. [DOI: 10.1016/j.mencom.2014.03.023] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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36
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Jing Q, Yi Z, Lin D, Zhu L, Yang K. Enhanced sorption of naphthalene and p-nitrophenol by nano-SiO2 modified with a cationic surfactant. WATER RESEARCH 2013; 47:4006-4012. [PMID: 23561503 DOI: 10.1016/j.watres.2012.09.057] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2012] [Revised: 08/08/2012] [Accepted: 09/17/2012] [Indexed: 06/02/2023]
Abstract
In this study, we observed that modification of nano-oxides (e.g., nano-SiO2) with cationic surfactants (e.g., cetyl pyridinium chloride, CPC) could be a potential way to make nano-oxides be superior sorbents with a partition mechanism for the sorptive removal of organic contaminants from wastewater where the coated CPC was an effective organic phase for partitioning. The partitioning of nonpolar naphthalene into coated CPC was induced by hydrophobic effect alone and presenting linear isotherms, while that of polar p-nitrophenol was induced by not only the hydrophobic effect but also the hydrogen-bonding interaction and presenting isotherm nonlinearity. The sorption affinity for naphthalene and p-nitrophenol partitioning into the coated CPC and the configuration of coated CPC remained unchanged although the amounts of coated CPC were increased. Linear relationships were established between the coated CPC amounts and the sorption capacities of naphthalene or p-nitrophenol, which could be used to predict the sorption of organic contaminants on surfactant-modified nano-oxides. In addition, these observed results would be also valuable for estimating the environmental behaviors and risks of nano-SiO2 and organic contaminants because nano-SiO2 would be inevitably coated with ubiquitous surfactants in the environment due to the discharging from the wide domestic and industry applications.
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Affiliation(s)
- Qingfeng Jing
- Department of Environmental Science, Zhejiang University, Hangzhou, Zhejiang 310058, China
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37
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Sarkar R, Mukhopadhyay C. Admicellar catalysis in multicomponent synthesis of polysubstituted pyrrolidinones. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.05.017] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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38
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Evolution of structure and interaction during aggregation of silica nanoparticles in aqueous electrolyte solution. Chem Phys Lett 2012. [DOI: 10.1016/j.cplett.2012.05.065] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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39
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Bochkova OD, Mustafina AR, Mukhametshina AR, Burilov VA, Skripacheva VV, Zakharova LY, Fedorenko SV, Konovalov AI, Soloveva SE, Antipin IS. The interfacial interactions of Tb-doped silica nanoparticles with surfactants and phospholipids revealed through the fluorescent response. Colloids Surf B Biointerfaces 2012; 92:327-33. [DOI: 10.1016/j.colsurfb.2011.12.015] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2011] [Revised: 11/17/2011] [Accepted: 12/08/2011] [Indexed: 10/14/2022]
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40
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Sagitova EA, Donfack P, Prokhorov KA, Nikolaeva GY, Gerasin VA, Merekalova ND, Materny A, Antipov EM, Pashinin PP. Symmetric C–C Stretching Mode Splitting versus CH2-Chain Conformation Order in Sodium Montmorillonite Modified by Cetyltrimethylammonium Bromide. J Phys Chem B 2011; 116:221-31. [PMID: 22136532 DOI: 10.1021/jp208036c] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Elena A. Sagitova
- A.M. Prokhorov General Physics Institute of Russian Academy of Sciences, Moscow, Russia
- Physics Department, Center of Functional Materials and Nanomolecular Science, Jacobs University, Bremen, Germany
| | - Patrice Donfack
- Physics Department, Center of Functional Materials and Nanomolecular Science, Jacobs University, Bremen, Germany
| | - Kirill A. Prokhorov
- A.M. Prokhorov General Physics Institute of Russian Academy of Sciences, Moscow, Russia
| | | | - Viktor A. Gerasin
- A.V. Topchiev Institute of Petrochemical Synthesis of Russian Academy of Sciences, Moscow, Russia
| | - Nadezhda D. Merekalova
- A.V. Topchiev Institute of Petrochemical Synthesis of Russian Academy of Sciences, Moscow, Russia
| | - Arnulf Materny
- Physics Department, Center of Functional Materials and Nanomolecular Science, Jacobs University, Bremen, Germany
| | - Evgeny M. Antipov
- A.V. Topchiev Institute of Petrochemical Synthesis of Russian Academy of Sciences, Moscow, Russia
| | - Pavel P. Pashinin
- A.M. Prokhorov General Physics Institute of Russian Academy of Sciences, Moscow, Russia
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41
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Ahualli S, Iglesias GR, Wachter W, Dulle M, Minami D, Glatter O. Adsorption of anionic and cationic surfactants on anionic colloids: supercharging and destabilization. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:9182-92. [PMID: 21696199 DOI: 10.1021/la201242d] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
We present herein a study on the adsorption of anionic (SDS), cationic (CTAB), and nonionic (C(12)E(5)) surfactants onto anionic silica nanoparticles. The effects of this adsorption are studied by means of the static structure factor, S(q), and the collective diffusion coefficient, D(c), obtained from small-angle X-ray scattering and dynamic light scattering measurements, respectively. The effective charge on the particles was determined also from classical electrophoresis and electroacoustic sonic-amplitude measurements. The surface tension of the sample was also investigated. Of particular note is the adsorption of SDS onto the silica nanoparticles, which leads to supercharging of the interface. This has interesting repercussions for structures obtained by the layer-by-layer (LbL) technique, because emulsions stabilized with supercharged and hydrophobized silica are perfect candidates for use in a multilayer system.
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Affiliation(s)
- S Ahualli
- Department of Applied Physics, University of Granada, 18071 Granada, Spain
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42
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Bochkova OD, Mustafina AR, Fedorenko SV, Konovalov AI. Silica nanoparticles with a substrate switchable luminescence. ACTA ACUST UNITED AC 2011. [DOI: 10.1088/1742-6596/291/1/012038] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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43
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Mustafina AR, Elistratova JG, Bochkova OD, Burilov VA, Fedorenko SV, Konovalov AI, Soloveva SY. Temperature induced phase separation of luminescent silica nanoparticles in Triton X-100 solutions. J Colloid Interface Sci 2011; 354:644-9. [DOI: 10.1016/j.jcis.2010.11.050] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2010] [Revised: 11/17/2010] [Accepted: 11/17/2010] [Indexed: 11/29/2022]
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44
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Hotze EM, Phenrat T, Lowry GV. Nanoparticle aggregation: challenges to understanding transport and reactivity in the environment. JOURNAL OF ENVIRONMENTAL QUALITY 2010; 39:1909-24. [PMID: 21284288 DOI: 10.2134/jeq2009.0462] [Citation(s) in RCA: 582] [Impact Index Per Article: 41.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Unique forms of manufactured nanomaterials, nanoparticles, and their suspensions are rapidly being created by manipulating properties such as shape, size, structure, and chemical composition and through incorporation of surface coatings. Although these properties make nanomaterial development interesting for new applications, they also challenge the ability of colloid science to understand nanoparticle aggregation in the environment and the subsequent effects on nanomaterial transport and reactivity. This review briefly covers aggregation theory focusing on Derjaguin-Landau-Verwey-Overbeak (DLVO)-based models most commonly used to describe the thermodynamic interactions between two particles in a suspension. A discussion of the challenges to DLVO posed by the properties of nanomaterials follows, along with examples from the literature. Examples from the literature highlighting the importance ofaggregation effects on transport and reactivity and risk of nanoparticles in the environment are discussed.
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Affiliation(s)
- Ernest M Hotze
- Center for Environmental Implications of NanoTechnology (CEINT) and Deps. of Civil & Environmental Engineering, Carnegie Mellon Univ., Pittsburgh, PA 15213-3890, USA
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45
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An D, Wang Z, Zhao X, Liu Y, Guo Y, Ren S. A new route to synthesis of surface hydrophobic silica with long-chain alcohols in water phase. Colloids Surf A Physicochem Eng Asp 2010. [DOI: 10.1016/j.colsurfa.2010.08.038] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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46
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Nanometer-scale size dependent imaging of cetyl trimethyl ammonium bromide (CTAB) capped and uncapped gold nanoparticles by apertureless near-field optical microscopy. Chem Phys Lett 2009. [DOI: 10.1016/j.cplett.2009.04.026] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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47
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Schmitt-Rozières M, Krägel J, Grigoriev DO, Liggieri L, Miller R, Vincent-Bonnieu S, Antoni M. From spherical to polymorphous dispersed phase transition in water/oil emulsions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:4266-4270. [PMID: 19281158 DOI: 10.1021/la804214m] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Optical scanning tomography is used to characterize bulk properties of transparent water-in-paraffin oil emulsions stabilized with hexadecyl-trimethylammonium bromide (CTAB) and silica nanoparticles. A flow of 500 hundred images is used to analyze each scanning shot with a precision of about 1 microm. The role of silica particles in the shape of the water droplets is investigated. Depending on the concentration of CTAB and silica nanoparticles, a transition occurs in their geometry that changes from spherical to polymorphous. This transition is controlled by the ratio R=[CTAB]/[SiO2] and is described using an identification procedure of the topology of the gray level contours of the tomographic images. The transition occurs for Rcrit approximately 3x10(-2) and is shown to correspond to a pH of the dispersed phase of 8.5.
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Affiliation(s)
- M Schmitt-Rozières
- Aix-Marseille Université-Université Paul Cézanne UMR-CNRS 6263 ISM2, Centre St. Jérôme, BP. 451, Marseille 13397 Marseille, Cedex 20, France
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Hayes PL, Chen EH, Achtyl JL, Geiger FM. An Optical Voltmeter for Studying Cetyltrimethylammonium Interacting with Fused Silica/Aqueous Interfaces at High Ionic Strength. J Phys Chem A 2009; 113:4269-80. [DOI: 10.1021/jp810891v] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Patrick L. Hayes
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208
| | - Ehow H. Chen
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208
| | - Jennifer L. Achtyl
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208
| | - Franz M. Geiger
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208
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Dederichs T, Möller M, Weichold O. Colloidal stability of hydrophobic nanoparticles in ionic surfactant solutions: definition of the critical dispersion concentration. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:2007-2012. [PMID: 19146423 DOI: 10.1021/la8033676] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The dispersion stability diagrams of hydrophobic boehmite nanoparticles in aqueous n-alkyltrimethylammonium bromide solutions (alkyl chain lengths 10-16) were studied over a wide range of particle and surfactant concentrations. The surfactant molecules adsorb tail-on on the particle surface, which provides the colloidal stability through electrostatic repulsion. In the stable region of each diagram, bimodal particle size distributions (50 and 500 nm) are found at lower surfactant concentration, which give way to monomodal distributions (50 nm) at higher concentration. This deagglomeration is connected with the cmc of the surfactants and can be explained by a desorption of counterions from the self-assembled surfactant layer. The desorption is caused by changes in the counterion concentration upon micellization. At low particle concentrations, the transition from the intermediate to the stable region, that is, the disappearance of the precipitate, occurs at a constant surfactant concentration. This concentration is introduced as the "critical dispersion concentration" (cdc), this being the lowest required concentration of a surfactant that is necessary to disperse the hydrophobic particles. The logarithm of the cdc shows a linear dependence on the surfactant chain length, thus a cmc-analogous behavior. The ratio cdc/cmc decreases with increasing surfactant chain length, indicating that long-chain surfactants are more efficient in dispersing nanoparticles than are their lower homologues. The existence of a system-specific critical cdc/cmc ratio, beyond which stable dispersions cannot be obtained, is proposed, which explains the disability of short-chain surfactants to disperse colloids.
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Affiliation(s)
- Thomas Dederichs
- DWI an der RWTH Aachen e.V. and Institut for Technische and Makromolekulare Chemie der RWTH Aachen, Aachen, Germany
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50
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Liquid–liquid interfacial properties of mixed nanoparticle–surfactant systems. Colloids Surf A Physicochem Eng Asp 2008. [DOI: 10.1016/j.colsurfa.2007.10.017] [Citation(s) in RCA: 162] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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