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Eygeris Y, Ulery N, Zharov I. pH-Responsive Membranes from Self-Assembly of Poly(2-(dimethylamino)ethyl methacrylate) Brush Silica Nanoparticles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:15792-15798. [PMID: 37874739 DOI: 10.1021/acs.langmuir.3c02455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2023]
Abstract
We have prepared novel pH-responsive nanoporous membranes by the self-assembly of silica nanoparticles carrying poly(2-(dimethylamino)ethyl methacrylate) (PDMAEMA) brushes with a degree of polymerization (DP) in the 100-450 range. The nanoparticles were prepared by surface-initiated ARGET-ATRP, and the membranes were assembled by pressure-driven deposition onto porous supports. The permeability and pore size of the resulting robust membranes were studied using water and hexane flux and filtration cutoff experiments. The pore size of the PDMAEMA "hairy" silica nanoparticle (HNP) membranes measured by water flux was ca. 22 nm and was mostly independent of the polymer brush length. We attributed this to a combination of the PDMAEMA brushes swelling and their permeability to water. In contrast, the pore size measured by hexane flux strongly depended on the DP. The flux and pore size of these membranes in water strongly depended on the pH. The pore size decreased by a factor of 1.6 when the pH was changed from neutral to acidic. pH-Responsive HNP membranes combine many attractive properties, including control over the filtration cutoff, responsive permeability, and high flux at low pressure. The reversible self-assembly of the PDMAEMA HNP membranes may help not only in their facile preparation but also in material recycling if biofouling occurs. The key features of the PDMAEMA HNP assemblies are attractive in membrane separations, molecular valves, and biosensors, where having precise control over the pore size and pore gating is highly desirable.
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Affiliation(s)
- Yulia Eygeris
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112, United States
| | - Noah Ulery
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112, United States
| | - Ilya Zharov
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112, United States
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Eygeris Y, Wang Q, Görke M, Grünwald M, Zharov I. Temperature-Responsive Nanoporous Membranes from Self-Assembly of Poly( N-isopropylacrylamide) Hairy Nanoparticles. ACS APPLIED MATERIALS & INTERFACES 2023. [PMID: 37285651 DOI: 10.1021/acsami.3c05072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Nanoporous membranes play a critical role in numerous separations on laboratory and industrial scales, ranging from water treatment to biotechnology. However, few strategies exist that allow for the preparation of mechanically robust nanoporous membranes whose separation properties can be easily tuned. Here, we introduce a new family of tunable nanoporous membranes based on nanoparticles decorated with temperature-responsive polymer brushes. We prepared mechanically robust membranes from hairy nanoparticles (HNPs) carrying PNIPAM polymer brushes. We assembled the HNPs into thin films through pressure-driven deposition of nanoparticle suspensions and measured the permeability and filtration cutoff of these membranes at different temperatures. The membrane pore diameter at room temperature varied between 10 and 30 nm depending on the polymer length. The water permeability of these membranes could be controlled by temperature, with the effective pore diameter increasing by a factor of 3-6 (up to 100 nm) when the temperature was increased to 60 °C. The size selectivity of these membranes in the filtration of nanoparticles could also be attenuated by temperature. Molecular dynamics computer simulations of a coarse-grained HNP model show that temperature-sensitive pores sizes are consistent with our experimental results and reveal the polymer configurations responsible for the observed filtration membrane permeability. We expect that these membranes will be useful for separations and in the preparation of responsive microfluidic devices.
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Affiliation(s)
- Yulia Eygeris
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112, United States
| | - Qiaoyi Wang
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112, United States
| | - Marion Görke
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112, United States
| | - Michael Grünwald
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112, United States
| | - Ilya Zharov
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112, United States
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Chen Y, Zhu Z, Tian Y, Jiang L. Rational ion transport management mediated through membrane structures. EXPLORATION 2021; 1:20210101. [PMCID: PMC10190948 DOI: 10.1002/exp.20210101] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Accepted: 09/13/2021] [Indexed: 06/14/2023]
Affiliation(s)
- Yupeng Chen
- Key Laboratory of Bio‐Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry Beihang University Beijing P. R. China
| | - Zhongpeng Zhu
- Key Laboratory of Bio‐Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry Beihang University Beijing P. R. China
| | - Ye Tian
- CAS Key Laboratory of Bio‐Inspired Materials and Interfacial Science CAS Center for Excellence in Nanoscience Technical Institute of Physics and Chemistry, Chinese Academy of Sciences Beijing P. R. China
- University of Chinese Academy of Sciences Beijing P. R. China
| | - Lei Jiang
- Key Laboratory of Bio‐Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry Beihang University Beijing P. R. China
- CAS Key Laboratory of Bio‐Inspired Materials and Interfacial Science CAS Center for Excellence in Nanoscience Technical Institute of Physics and Chemistry, Chinese Academy of Sciences Beijing P. R. China
- University of Chinese Academy of Sciences Beijing P. R. China
- School of Future Technology University of Chinese Academy of Sciences Beijing P. R. China
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Enzyme immobilization on a pH-responsive porous polymer membrane for enzymatic kinetics study. CHINESE CHEM LETT 2021. [DOI: 10.1016/j.cclet.2021.03.021] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Medidhi KR, Padmanabhan V. Viscosity of polyelectrolyte-grafted nanoparticle solutions. SOFT MATTER 2021; 17:3455-3462. [PMID: 33650625 DOI: 10.1039/d0sm02142c] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The effect of charges and hydrogen bonding on viscosity in solutions containing polyelectrolyte-grafted nanoparticles (PENP) has been investigated using molecular dynamics (MD) simulations. The electrostatic interaction between the charged monomers on the grafted chains, which increases with the degree of ionization, causes the grafted polymers to stretch and increases the hydrodynamic size of the nanoparticles. The viscosity of the solution is partially governed by the balance between the entanglement of grafted chains and the electrostatic repulsion. Moreover, the charge-assisted hydrogen bonds between the monomers of different particles further enhance the viscosity of the solution. For shorter grafted chains, a majority of hydrogen bonds are formed within the same particle and thus show no significant enhancement in viscosity. The addition of polymer chains with hydrogen bonding sites has been shown to bridge multiple nanoparticles, creating a network structure, that increases viscosity. The chain stiffness has been shown to have a direct correlation with bridging and thus the viscosity of the solution.
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Affiliation(s)
- Koteswara Rao Medidhi
- Department of Chemical Engineering, Tennessee Technological University, Cookeville, Tennessee 38501, USA.
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Basnig D, Vilá N, Herzog G, Walcarius A. Voltammetric behaviour of cationic redox probes at mesoporous silica film electrodes. J Electroanal Chem (Lausanne) 2020. [DOI: 10.1016/j.jelechem.2020.113993] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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Lv J, Chen D, Du Y, Wang T, Zhang X, Li Y, Zhang L, Wang Y, Jordan R, Fu Y. Visual Detection of Thiocyanate Based on Fabry-Perot Etalons with a Responsive Polymer Brush as the Transducer. ACS Sens 2020; 5:303-307. [PMID: 32039587 DOI: 10.1021/acssensors.9b02270] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
The detection of thiocyanate (SCN-) is particularly important in industrial effluents and biological fluids because of the toxic nature of SCN-. Herein, a metal-insulator-metal (MIM) resonator for visual detection of SCN- is presented based on a poly[(2-(methacryloyloxy)ethyl) trimethylammonium chloride] (PMETAC) brush. The MIM resonator exhibits obvious color change as the concentration of SCN- changes, which can be easily distinguished by the naked eyes. In addition, the as-prepared MIM resonator also shows the advantages of good anti-interference, excellent reusability, and fast response rate. Combining the above advantages, the proposed MIM resonator may provide a broad perspective for a wide variety of visible-light applications.
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Affiliation(s)
- Jinqiu Lv
- College of Sciences, Northeastern University, Shenyang 110819, P. R. China
| | - Dan Chen
- College of Sciences, Northeastern University, Shenyang 110819, P. R. China
| | - Yunhao Du
- Chair of Macromolecular Chemistry, School of Science, Technische Universität Dresden, 01069 Dresden, Germany
| | - Tieqiang Wang
- College of Sciences, Northeastern University, Shenyang 110819, P. R. China
- Chair of Macromolecular Chemistry, School of Science, Technische Universität Dresden, 01069 Dresden, Germany
| | - Xuemin Zhang
- College of Sciences, Northeastern University, Shenyang 110819, P. R. China
| | - Yunong Li
- College of Sciences, Northeastern University, Shenyang 110819, P. R. China
| | - Liying Zhang
- College of Sciences, Northeastern University, Shenyang 110819, P. R. China
| | - Yan Wang
- Ningbo Zhong An Qi Safety Technology Co., Ltd, Ningbo 315000, China
| | - Rainer Jordan
- Chair of Macromolecular Chemistry, School of Science, Technische Universität Dresden, 01069 Dresden, Germany
| | - Yu Fu
- College of Sciences, Northeastern University, Shenyang 110819, P. R. China
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Das A N, Begam N, Chandran S, Swain A, Sprung M, Basu JK. Thermal stability and dynamics of soft nanoparticle membranes: role of entropy, enthalpy and membrane compressibility. SOFT MATTER 2020; 16:1117-1124. [PMID: 31894229 DOI: 10.1039/c9sm01946d] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Nanoparticle based ultra-thin membranes have been shown to have remarkable mechanical properties while also possessing novel electrical, optical or magnetic properties, which could be controlled by tailoring properties at the level of individual nanoparticles. Since in most cases the ultra-thin membranes are coupled to some substrates, the role of membrane-substrate interactions, apart from nanoparticle-nanoparticle interactions become very crucial in understanding their mechanical and thermal stability, as well as their plethora of applications. However, systematic studies in this direction have been conspicuously absent. Here we report thermal stability and the corresponding microscopic dynamics of polymer supported ultra-thin membranes comprising of self-assembled, ordered grains of polymer grafted nanoparticles having tunable mechanical properties. The initially ordered membranes show distinct pathways for temperature induced disordering depending on membrane flexibility as well as on interfacial entropic and enthalpic interactions with the underlying polymer thin film. We also observe contrasting temperature dependence of microscopic dynamics of these membranes depending on whether the graft polymer-substrate polymer interactions are predominantly entropic or enthalpic in nature. Our results suggest that apart from their varied applications, the soft nanoparticle-polymer hybrid membranes are a playground for rich physics involving subtle entropic and enthalpic effects along with the nanoparticles softness, which eventually determine their thermo-mechanical stability.
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Affiliation(s)
- Nimmi Das A
- Department of Physics, Indian Institute of Science, Bangalore, 560012, India.
| | - Nafisa Begam
- Institute of Applied Physics, University of Tuebingen, 72076 Tuebingen, Germany
| | | | - Aparna Swain
- Department of Physics, Indian Institute of Science, Bangalore, 560012, India.
| | - Michael Sprung
- Deutsches Elektronen Synchrotron DESY, Notkestresse 85, 22607 Hamburg, Germany
| | - J K Basu
- Department of Physics, Indian Institute of Science, Bangalore, 560012, India.
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Yi C, Yang Y, Liu B, He J, Nie Z. Polymer-guided assembly of inorganic nanoparticles. Chem Soc Rev 2019; 49:465-508. [PMID: 31845685 DOI: 10.1039/c9cs00725c] [Citation(s) in RCA: 123] [Impact Index Per Article: 24.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The self-assembly of inorganic nanoparticles is of great importance in realizing their enormous potentials for broad applications due to the advanced collective properties of nanoparticle ensembles. Various molecular ligands (e.g., small molecules, DNAs, proteins, and polymers) have been used to assist the organization of inorganic nanoparticles into functional structures at different hierarchical levels. Among others, polymers are particularly attractive for use in nanoparticle assembly, because of the complex architectures and rich functionalities of assembled structures enabled by polymers. Polymer-guided assembly of nanoparticles has emerged as a powerful route to fabricate functional materials with desired mechanical, optical, electronic or magnetic properties for a broad range of applications such as sensing, nanomedicine, catalysis, energy storage/conversion, data storage, electronics and photonics. In this review article, we summarize recent advances in the polymer-guided self-assembly of inorganic nanoparticles in both bulk thin films and solution, with an emphasis on the role of polymers in the assembly process and functions of resulting nanostructures. Precise control over the location/arrangement, interparticle interaction, and packing of inorganic nanoparticles at various scales are highlighted.
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Affiliation(s)
- Chenglin Yi
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai, 200438, P. R. China.
| | - Yiqun Yang
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai, 200438, P. R. China.
| | - Ben Liu
- Jiangsu Key Laboratory of New Power Batteries, Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, Jiangsu 210023, China and Department of Chemistry and Polymer Program, Institute of Materials Science, University of Connecticut, Storrs, CT 06268, USA.
| | - Jie He
- Department of Chemistry and Polymer Program, Institute of Materials Science, University of Connecticut, Storrs, CT 06268, USA.
| | - Zhihong Nie
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai, 200438, P. R. China.
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White EV, Fullwood D, Golden KM, Zharov I. Percolation analysis for estimating the maximum size of particles passing through nanosphere membranes. Phys Rev E 2019; 99:022904. [PMID: 30934372 DOI: 10.1103/physreve.99.022904] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Indexed: 11/07/2022]
Abstract
Percolation theory can be used to study the flow-related properties of various porous systems. In particular, recently developed membranes from silica nanoparticles with surface grafted polymer brushes represent a quintessential hard-sphere soft-shell system for which fluid-flow behavior can be illuminated via a percolation framework. However, a critical parameter in membrane design involves the maximum pass-through size of particles. While percolation theory considers path connectedness of a system, little explicit consideration is given to the size of the paths that traverse the space. This paper employs a hard-sphere soft-shell percolation model to investigate maximum particle pass-through size of membranes. A pixelated (as opposed to continuous) representation of the geometry is created, and combined with readily available homology software to analyze percolation behavior. The model is validated against previously published results. For a given sphere volume fraction, the maximum diameter of a percolating path is determined by applying iterative dilations to the spheres until the percolation threshold is reached. A simple approximate relationship between maximum particle size and sphere volume fraction is derived for application to membrane design. Experimental particle cutoff size results for the polymer modified silica nanoparticle membranes were used as a partial verification of the model created in this paper. The presence of a distribution of sphere sizes (naturally created by the manufacturing process) is found to have negligible effect, compared to results for a single sphere size.
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Affiliation(s)
- Emily V White
- Department of Chemistry, University of Utah, Salt Lake City, Utah 84112, USA
| | - David Fullwood
- Department of Mechanical Engineering, Brigham Young University, Provo, Utah 84602, USA
| | - Kenneth M Golden
- Department of Mathematics, University of Utah, Salt Lake City, Utah 84112-0090, USA
| | - Ilya Zharov
- Department of Chemistry, University of Utah, Salt Lake City, Utah 84112, USA
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