1
|
Li B, Zhang PL, Sun ZY. Entropy-favorable adsorption of polymer-grafted nanoparticles at fluid-fluid interfaces. J Chem Phys 2024; 161:094905. [PMID: 39225530 DOI: 10.1063/5.0230107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2024] [Accepted: 08/19/2024] [Indexed: 09/04/2024] Open
Abstract
The adsorption of polymer-grafted nanoparticles at interfaces is a problem of fundamental interest in physics and soft materials. This adsorption behavior is governed by the interplay between interaction potentials and entropic effects. Here, we use molecular dynamics simulations and umbrella sampling methods to study the adsorption behavior of a Janus-like homopolymer-grafted nanoparticle at fluid-fluid interfaces. By calculating the potential of the mean force as the particle moves from fluid A to the interface, the adsorption energy Ea can be obtained. When two homopolymer chains with types A and B are grafted to the opposite poles of the particle, Ea shows a scaling behavior with respect to chain length N: Ea ∝ N0.598. This is determined by the interactions between polymers and fluids. The enthalpy dominates, and the entropy effects mainly come from the rotational entropy loss of the polymer-grafted nanoparticle at interfaces, which disfavors the stabilization of particles at interfaces. When the grafted polymer number m is large, the adsorption energy exhibits a linear dependence on m. While the enthalpy dominates the behavior, the entropy becomes significant at a larger chain length of N = 15, where the configurational entropy of the polymer chains dominates the entropy of the system. The globule-coil transition occurs when polymers move from poor solvents to good solvents, increasing the configurational entropy and favoring the stabilization of particles at interfaces. Our study provides novel insights into the stabilization mechanism of polymer-grafted nanoparticles at interfaces and reveals the stabilization mechanism favored by the configurational entropy of grafted polymer chains.
Collapse
Affiliation(s)
- Bing Li
- State Key Laboratory of Polymer Physics and Chemistry & Key Laboratory of Polymer Science and Technology, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 130022 Changchun, China
| | - Pei-Lei Zhang
- State Key Laboratory of Polymer Physics and Chemistry & Key Laboratory of Polymer Science and Technology, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 130022 Changchun, China
- University of Science and Technology of China, Hefei 230026, China
| | - Zhao-Yan Sun
- State Key Laboratory of Polymer Physics and Chemistry & Key Laboratory of Polymer Science and Technology, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 130022 Changchun, China
- University of Science and Technology of China, Hefei 230026, China
| |
Collapse
|
2
|
Zhao G, Li Y, Zhen W, Gao J, Gu Y, Hong B, Han X, Zhao S, Pera-Titus M. Enhanced Biphasic Reactions in Amphiphilic Silica Mesopores. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2024; 128:1644-1653. [PMID: 38322775 PMCID: PMC10839897 DOI: 10.1021/acs.jpcc.3c07477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/12/2023] [Revised: 12/21/2023] [Accepted: 01/02/2024] [Indexed: 02/08/2024]
Abstract
In this study, we investigated the effect of the pore volume and mesopore size of surface-active catalytic organosilicas on the genesis of particle-stabilized (Pickering) emulsions for the dodecanal/ethylene glycol system and their reactivity for the acid-catalyzed biphasic acetalization reaction. To this aim, we functionalized a series of fumed silica superparticles (size 100-300 nm) displaying an average mesopore size in the range of 11-14 nm and variable mesopore volume, with a similar surface density of octyl and propylsulfonic acid groups. The modified silica superparticles were characterized in detail using different techniques, including acid-base titration, thermogravimetric analysis, TEM, and dynamic light scattering. The pore volume of the particles impacts their self-assembly and coverage at the dodecanal/ethylene glycol (DA/EG) interface. This affects the stability and the average droplet size of emulsions and conditions of the available interfacial surface area for reaction. The maximum DA-EG productivity is observed for A200 super-SiNPs with a pore volume of 0.39 cm3·g-1 with an interfacial coverage by particles lower than 1 (i.e., submonolayer). Using dissipative particle dynamics and all-atom grand canonical Monte Carlo simulations, we unveil a stabilizing role of the pore volume of porous silica superparticles for generating emulsions and local micromixing of immiscible dodecanal and ethylene glycol, allowing fast and efficient solvent-free acetalization in the presence of Pickering emulsions. The micromixing level is interrelated to the adsorption energy of self-assembled particles at the DA/EG interface.
Collapse
Affiliation(s)
- Guolin Zhao
- Eco-Efficient
Products and Processes Laboratory (E2P2L), UMI 3464 CNRS − Solvay, 3966 Jin Du Road, Xin Zhuang Ind. Zone, Shanghai 201108, China
- State
Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Yao Li
- Eco-Efficient
Products and Processes Laboratory (E2P2L), UMI 3464 CNRS − Solvay, 3966 Jin Du Road, Xin Zhuang Ind. Zone, Shanghai 201108, China
- State
Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Wen Zhen
- School
of Chemistry and Chemical Engineering, Guangxi
University, Nanning 530004, China
| | - Jie Gao
- Eco-Efficient
Products and Processes Laboratory (E2P2L), UMI 3464 CNRS − Solvay, 3966 Jin Du Road, Xin Zhuang Ind. Zone, Shanghai 201108, China
| | - Yunjiao Gu
- Eco-Efficient
Products and Processes Laboratory (E2P2L), UMI 3464 CNRS − Solvay, 3966 Jin Du Road, Xin Zhuang Ind. Zone, Shanghai 201108, China
| | - Bing Hong
- Eco-Efficient
Products and Processes Laboratory (E2P2L), UMI 3464 CNRS − Solvay, 3966 Jin Du Road, Xin Zhuang Ind. Zone, Shanghai 201108, China
| | - Xia Han
- State
Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Shuangliang Zhao
- State
Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
- School
of Chemistry and Chemical Engineering, Guangxi
University, Nanning 530004, China
| | - Marc Pera-Titus
- Eco-Efficient
Products and Processes Laboratory (E2P2L), UMI 3464 CNRS − Solvay, 3966 Jin Du Road, Xin Zhuang Ind. Zone, Shanghai 201108, China
- Cardiff
Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, U.K.
| |
Collapse
|
3
|
Baran Ł, Borówko M, Rżysko W, Smołka J. Amphiphilic Janus Particles Confined in Symmetrical and Janus-Like Slits. ACS OMEGA 2023; 8:18863-18873. [PMID: 37273616 PMCID: PMC10233691 DOI: 10.1021/acsomega.3c01180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Accepted: 05/04/2023] [Indexed: 06/06/2023]
Abstract
We use Monte Carlo simulations to investigate the behavior of Janus spheres composed of attractive and repulsive parts confined between two parallel solid surfaces. The slits with identical and competing walls are studied. The adsorption isotherms of Janus particles are determined, and the impact of the density in the pore on the morphology is discussed in detail. So far, this issue has not been systematically investigated. New, unique structures are observed along the isotherms, including the bilayer and three-layer structures located at different distances from the walls. We analyze how selected parameters affect the positional and orientational ordering in these layers. In some cases, the particles form highly ordered hexagonal lattices.
Collapse
Affiliation(s)
- Łukasz Baran
- Department
of Theoretical Chemistry, Institute of Chemical Sciences, Faculty
of Chemistry, Maria Curie-Sklodowska University in Lublin, Pl. M Curie-Sklodowskiej 3, 20-031 Lublin, Poland
| | - Małgorzata Borówko
- Department
of Theoretical Chemistry, Institute of Chemical Sciences, Faculty
of Chemistry, Maria Curie-Sklodowska University in Lublin, Pl. M Curie-Sklodowskiej 3, 20-031 Lublin, Poland
| | - Wojciech Rżysko
- Department
of Theoretical Chemistry, Institute of Chemical Sciences, Faculty
of Chemistry, Maria Curie-Sklodowska University in Lublin, Pl. M Curie-Sklodowskiej 3, 20-031 Lublin, Poland
| | - Jakub Smołka
- Department
of Computer Science, Lublin University of
Technology, Nadbystrzycka 36B, 20-618 Lublin, Poland
| |
Collapse
|
4
|
Borówko M, Staszewski T, Tomasik J. Janus Ligand-Tethered Nanoparticles at Liquid-Liquid Interfaces. J Phys Chem B 2023. [PMID: 37248200 DOI: 10.1021/acs.jpcb.3c01943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We investigate the structural properties of Janus ligand-tethered nanoparticles at liquid-liquid interfaces using coarse-grained molecular dynamics simulations. The effect of interactions between different chains and liquids is discussed. We consider the Janus particles with symmetrical interactions with the liquids which correspond to supplementary wettability and particles with uncorrelated interactions. Simulation results indicate that the Janus hairy particles trapped in the interface region have different configurations characterized by the vertical displacement distance, the orientation of the Janus line relative to the interface, and the particle shape. The Janus hairy particles present abundant morphologies, including dumbbell-like and typical core-shell, at the interface. The shape of adsorbed particles is analyzed in detail. The simulation data are compared with those predicted by a simple phenomenological approach. This work can promote the applications of Janus hairy particles in nanotechnology.
Collapse
Affiliation(s)
- Małgorzata Borówko
- Department of Theoretical Chemistry, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Skłodowska University, 20-031 Lublin, Poland
| | - Tomasz Staszewski
- Department of Theoretical Chemistry, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Skłodowska University, 20-031 Lublin, Poland
| | - Joanna Tomasik
- Department of Theoretical Chemistry, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Skłodowska University, 20-031 Lublin, Poland
| |
Collapse
|
5
|
Hybrid Nanoparticles at Fluid-Fluid Interfaces: Insight from Theory and Simulation. Int J Mol Sci 2023; 24:ijms24054564. [PMID: 36901995 PMCID: PMC10003740 DOI: 10.3390/ijms24054564] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 02/22/2023] [Accepted: 02/23/2023] [Indexed: 03/02/2023] Open
Abstract
Hybrid nanoparticles that combine special properties of their different parts have numerous applications in electronics, optics, catalysis, medicine, and many others. Of the currently produced particles, Janus particles and ligand-tethered (hairy) particles are of particular interest both from a practical and purely cognitive point of view. Understanding their behavior at fluid interfaces is important to many fields because particle-laden interfaces are ubiquitous in nature and industry. We provide a review of the literature, focusing on theoretical studies of hybrid particles at fluid-fluid interfaces. Our goal is to give a link between simple phenomenological models and advanced molecular simulations. We analyze the adsorption of individual Janus particles and hairy particles at the interfaces. Then, their interfacial assembly is also discussed. The simple equations for the attachment energy of various Janus particles are presented. We discuss how such parameters as the particle size, the particle shape, the relative sizes of different patches, and the amphiphilicity affect particle adsorption. This is essential for taking advantage of the particle capacity to stabilize interfaces. Representative examples of molecular simulations were presented. We show that the simple models surprisingly well reproduce experimental and simulation data. In the case of hairy particles, we concentrate on the effects of reconfiguration of the polymer brushes at the interface. This review is expected to provide a general perspective on the subject and may be helpful to many researchers and technologists working with particle-laden layers.
Collapse
|
6
|
Dedovets D, Li Q, Leclercq L, Nardello‐Rataj V, Leng J, Zhao S, Pera‐Titus M. Multiphase Microreactors Based on Liquid-Liquid and Gas-Liquid Dispersions Stabilized by Colloidal Catalytic Particles. Angew Chem Int Ed Engl 2022; 61:e202107537. [PMID: 34528366 PMCID: PMC9293096 DOI: 10.1002/anie.202107537] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2021] [Indexed: 01/08/2023]
Abstract
Pickering emulsions, foams, bubbles, and marbles are dispersions of two immiscible liquids or of a liquid and a gas stabilized by surface-active colloidal particles. These systems can be used for engineering liquid-liquid-solid and gas-liquid-solid microreactors for multiphase reactions. They constitute original platforms for reengineering multiphase reactors towards a higher degree of sustainability. This Review provides a systematic overview on the recent progress of liquid-liquid and gas-liquid dispersions stabilized by solid particles as microreactors for engineering eco-efficient reactions, with emphasis on biobased reagents. Physicochemical driving parameters, challenges, and strategies to (de)stabilize dispersions for product recovery/catalyst recycling are discussed. Advanced concepts such as cascade and continuous flow reactions, compartmentalization of incompatible reagents, and multiscale computational methods for accelerating particle discovery are also addressed.
Collapse
Affiliation(s)
- Dmytro Dedovets
- Eco-Efficient Products and Processes Laboratory (E2P2L)UMI 3464 CNRS-Solvay3966 Jin Du Road, Xin Zhuang Ind Zone201108ShanghaiChina
- Laboratoire du Futur (LOF)UMR 5258, CNRS-Solvay-Universite Bordeaux 1178 Av Dr Albert Schweitzer33608Pessac CedexFrance
| | - Qingyuan Li
- Eco-Efficient Products and Processes Laboratory (E2P2L)UMI 3464 CNRS-Solvay3966 Jin Du Road, Xin Zhuang Ind Zone201108ShanghaiChina
| | - Loïc Leclercq
- Univ LilleCNRSCentrale LilleUniv ArtoisUMR 8181 UCCSF-59000LilleFrance
| | | | - Jacques Leng
- Laboratoire du Futur (LOF)UMR 5258, CNRS-Solvay-Universite Bordeaux 1178 Av Dr Albert Schweitzer33608Pessac CedexFrance
| | - Shuangliang Zhao
- Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification TechnologySchool of Chemistry and Chemical EngineeringGuangxi University530004NanningChina
| | - Marc Pera‐Titus
- Eco-Efficient Products and Processes Laboratory (E2P2L)UMI 3464 CNRS-Solvay3966 Jin Du Road, Xin Zhuang Ind Zone201108ShanghaiChina
- Cardiff Catalysis InstituteSchool of ChemistryCardiff UniversityMain Building, Park PlaceCardiffCF10 3ATUK
| |
Collapse
|
7
|
Dedovets D, Li Q, Leclercq L, Nardello‐Rataj V, Leng J, Zhao S, Pera‐Titus M. Multiphase Microreactors Based on Liquid–Liquid and Gas–Liquid Dispersions Stabilized by Colloidal Catalytic Particles. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202107537] [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)
- Dmytro Dedovets
- Eco-Efficient Products and Processes Laboratory (E2P2L) UMI 3464 CNRS-Solvay 3966 Jin Du Road, Xin Zhuang Ind Zone 201108 Shanghai China
- Laboratoire du Futur (LOF) UMR 5258, CNRS-Solvay-Universite Bordeaux 1 178 Av Dr Albert Schweitzer 33608 Pessac Cedex France
| | - Qingyuan Li
- Eco-Efficient Products and Processes Laboratory (E2P2L) UMI 3464 CNRS-Solvay 3966 Jin Du Road, Xin Zhuang Ind Zone 201108 Shanghai China
| | - Loïc Leclercq
- Univ Lille CNRS Centrale Lille Univ Artois UMR 8181 UCCS F-59000 Lille France
| | | | - Jacques Leng
- Laboratoire du Futur (LOF) UMR 5258, CNRS-Solvay-Universite Bordeaux 1 178 Av Dr Albert Schweitzer 33608 Pessac Cedex France
| | - Shuangliang Zhao
- Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology School of Chemistry and Chemical Engineering Guangxi University 530004 Nanning China
| | - Marc Pera‐Titus
- Eco-Efficient Products and Processes Laboratory (E2P2L) UMI 3464 CNRS-Solvay 3966 Jin Du Road, Xin Zhuang Ind Zone 201108 Shanghai China
- Cardiff Catalysis Institute School of Chemistry Cardiff University Main Building, Park Place Cardiff CF10 3AT UK
| |
Collapse
|
8
|
Correia EL, Brown N, Razavi S. Janus Particles at Fluid Interfaces: Stability and Interfacial Rheology. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:374. [PMID: 33540620 PMCID: PMC7913064 DOI: 10.3390/nano11020374] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/01/2021] [Revised: 01/26/2021] [Accepted: 01/29/2021] [Indexed: 02/08/2023]
Abstract
The use of the Janus motif in colloidal particles, i.e., anisotropic surface properties on opposite faces, has gained significant attention in the bottom-up assembly of novel functional structures, design of active nanomotors, biological sensing and imaging, and polymer blend compatibilization. This review is focused on the behavior of Janus particles in interfacial systems, such as particle-stabilized (i.e., Pickering) emulsions and foams, where stabilization is achieved through the binding of particles to fluid interfaces. In many such applications, the interface could be subjected to deformations, producing compression and shear stresses. Besides the physicochemical properties of the particle, their behavior under flow will also impact the performance of the resulting system. This review article provides a synopsis of interfacial stability and rheology in particle-laden interfaces to highlight the role of the Janus motif, and how particle anisotropy affects interfacial mechanics.
Collapse
Affiliation(s)
| | | | - Sepideh Razavi
- School of Chemical, Biological, and Materials Engineering, University of Oklahoma, 100 E. Boyd Street, Norman, OK 73019, USA; (E.L.C.); (N.B.)
| |
Collapse
|
9
|
Surface tension anomaly observed for chemically-modified Janus particles at the air/water interface. J Colloid Interface Sci 2020; 558:95-99. [DOI: 10.1016/j.jcis.2019.09.084] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Revised: 09/20/2019] [Accepted: 09/22/2019] [Indexed: 11/24/2022]
|
10
|
Razavi S, Lin B, Lee KYC, Tu RS, Kretzschmar I. Impact of Surface Amphiphilicity on the Interfacial Behavior of Janus Particle Layers under Compression. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:15813-15824. [PMID: 31269790 DOI: 10.1021/acs.langmuir.9b01664] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Langmuir monolayers of silica/gold Janus particles with two different degrees of amphiphilicity have been examined to study the significance of particle surface amphiphilicity on the structure and mechanical properties of the interfacial layers. The response of the layers to the applied compression provides insight into the nature and strength of the interparticle interactions. Different collapse modes observed for the interfacial layers are linked to the amphiphilicity of Janus particles and their configuration at the interface. Molecular dynamics simulations on nanoparticles with similar contact angles provide insight on the arrangement of particles at the interface and support our conclusion that the interfacial configuration and collapse of anisotropic particles at the air/water interface are controlled by particle amphiphilicity.
Collapse
Affiliation(s)
- Sepideh Razavi
- Chemical, Biological, and Materials Engineering , University of Oklahoma , Norman , Oklahoma 73019 , United States
| | | | | | - Raymond S Tu
- Department of Chemical Engineering , City College of the City University of New York , New York , New York 10031 , United States
| | - Ilona Kretzschmar
- Department of Chemical Engineering , City College of the City University of New York , New York , New York 10031 , United States
| |
Collapse
|
11
|
Borówko M, Sokołowski S, Staszewski T. Amphiphilic Dimers at Liquid-Liquid Interfaces: A Density Functional Approach. J Phys Chem B 2019; 123:5962-5972. [PMID: 31204480 DOI: 10.1021/acs.jpcb.9b04501] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
We apply density functional theory to study the structure of dimers at the interface between two partially miscible symmetric liquids. The dimers are built of two tangentially jointed spheres and do not solve the coexisting liquids. The interactions in the system are modeled using Lennard-Jones potentials with different interactions between segments of the dimers and the liquid components. We study how asymmetry of the interactions between dimers and molecules of the liquid, i.e., the degree of dimer amphiphilicity, influences the interfacial structure. Two unexpected phenomena have been found. First, for some systems, the liquid-liquid interface is able to accommodate only a finite amount of dimers. If the amount of added dimers is larger than a threshold value, a part or all of the dimers move to the interior one of the coexisting phase, forming an insoluble sheet inside it, or the initial interface splits into separate parts. The second is a peculiar behavior of the dependence of the interfacial width with an increase of the amount of added dimers. In this case, we observe a discontinuous jump that is connected with reorientation of dimers with respect to the interface.
Collapse
Affiliation(s)
- M Borówko
- Department for the Modelling of Physico-Chemical Processes , Maria Curie-Skłodowska University , 20031 Lublin , Poland
| | - S Sokołowski
- Department for the Modelling of Physico-Chemical Processes , Maria Curie-Skłodowska University , 20031 Lublin , Poland
| | - T Staszewski
- Department for the Modelling of Physico-Chemical Processes , Maria Curie-Skłodowska University , 20031 Lublin , Poland
| |
Collapse
|