1
|
Hossain I, Husna A, Yoo SY, Kim KI, Kang JH, Park I, Lee BK, Park HB. Tailoring the Structure-Property Relationship of Ring-Opened Metathesis Copolymers for CO 2-Selective Membranes. ACS APPLIED MATERIALS & INTERFACES 2024; 16:26743-26756. [PMID: 38733403 DOI: 10.1021/acsami.4c02865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2024]
Abstract
In this work, we explore the use of ring-opening metathesis polymerization (ROMP) facilitated by a second-generation Grubbs catalyst (G2) for the development of advanced polymer membranes aimed at CO2 separation. By employing a novel copolymer blend incorporating 4,4'-oxidianiline (ODA), 1,6-hexanediamine (HDA), 1-adamantylamine (AA), and 3,6,9-trioxaundecylamine (TA), along with a CO2-selective poly(ethylene glycol)/poly(propylene glycol) copolymer (Jeffamine2003) and polydimethylsiloxane (PDMS) units, we have synthesized membranes under ambient conditions with exceptional CO2 separation capabilities. The strategic inclusion of PDMS, up to a 20% composition within the PEG/PPG matrix, has resulted in copolymer membranes that not only surpass the 2008 upper limit for CO2/N2 separation but also meet the commercial targets for CO2/H2 separation. Comprehensive analysis reveals that these membranes adhere to the mixing rule and exhibit percolation behavior across the entire range of compositions (0-100%), maintaining robust antiplasticization performance even under pressures up to 20 atm. Our findings underscore the potential of ROMP in creating precisely engineered membranes for efficient CO2 separation, paving the way for their application in large-scale environmental and industrial processes.
Collapse
Affiliation(s)
- Iqubal Hossain
- Department of Energy Engineering, Hanyang University, Seoul 04763, Republic of Korea
| | - Asmaul Husna
- Department of Energy Engineering, Hanyang University, Seoul 04763, Republic of Korea
| | - Seung Yeon Yoo
- Department of Energy Engineering, Hanyang University, Seoul 04763, Republic of Korea
| | - Kwan Il Kim
- Department of Energy Engineering, Hanyang University, Seoul 04763, Republic of Korea
| | - Jun Hyeok Kang
- Department of Energy Engineering, Hanyang University, Seoul 04763, Republic of Korea
| | - Inho Park
- Department of Energy Engineering, Hanyang University, Seoul 04763, Republic of Korea
| | - Byung Kwan Lee
- Department of Energy Engineering, Hanyang University, Seoul 04763, Republic of Korea
| | - Ho Bum Park
- Department of Energy Engineering, Hanyang University, Seoul 04763, Republic of Korea
| |
Collapse
|
2
|
Moghaddam SZ, Thormann E. Surface forces and friction tuned by thermo-responsive polymer films. Curr Opin Colloid Interface Sci 2020. [DOI: 10.1016/j.cocis.2019.12.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
|
3
|
Thermo-Responsive Polymer Brushes with Side Graft Chains: Relationship Between Molecular Architecture and Underwater Adherence. Int J Mol Sci 2019; 20:ijms20246295. [PMID: 31847112 PMCID: PMC6941113 DOI: 10.3390/ijms20246295] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Revised: 12/10/2019] [Accepted: 12/11/2019] [Indexed: 01/19/2023] Open
Abstract
During the last few decades, wet adhesives have been developed for applications in various fields. Nonetheless, key questions such as the most suitable polymer architecture as well as the most suitable chemical composition remain open. In this article, we investigate the underwater adhesion properties of novel responsive polymer brushes with side graft chain architecture prepared using “grafting through” approach on flat surfaces. The incorporation in the backbone of thermo-responsive poly(N-isopropylacrylamide) (PNIPAm) allowed us to obtain LCST behavior in the final layers. PNIPAm is co-polymerized with poly(methyl ethylene phosphate) (PMEP), a poloyphosphoester. The final materials are characterized studying the surface-grafted polymer as well as the polymer from the bulk solution, and pure PNIPAm brush is used as reference. PNIPAm-g-PMEP copolymers retain the responsive behavior of PNIPAm: when T > LCST, a clear switching of properties is observed. More specifically, all layers above the critical temperature show collapse of the chains, increased hydrophobicity and variation of the surface charge even if no ionizable groups are present. Secondly, effect of adhesion parameters such as debonding rate and contact time is studied. Thirdly, the reversibility of the adhesive properties is confirmed by performing adhesion cycles. Finally, the adhesive properties of the layers are studied below and above the LCST against hydrophilic and hydrophobic substrates.
Collapse
|
4
|
Lazutin AA, Vasilevskaya VV, Khokhlov AR. Self-assembly in densely grafted macromolecules with amphiphilic monomer units: diagram of states. SOFT MATTER 2017; 13:8525-8533. [PMID: 29091101 DOI: 10.1039/c7sm01560g] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
By means of computer modelling, the self-organization of dense planar brushes of macromolecules with amphiphilic monomer units was addressed and their state diagram was constructed. The diagram of states includes the following regions: disordered position of monomer units with respect to each other, strands composed of a few polymer chains and lamellae with different domain spacing. The transformation of lamellae structures with different domain spacing occurred within the intermediate region and could proceed through the formation of so-called parking garage structures. The parking garage structure joins the lamellae with large (on the top of the brushes) and small (close to the grafted surface) domain spacing, which appears like a system of inclined locally parallel layers connected with each other by bridges. The parking garage structures were observed for incompatible A and B groups in selective solvents, which result in aggregation of the side B groups and dense packing of amphiphilic macromolecules in the restricted volume of the planar brushes.
Collapse
Affiliation(s)
- A A Lazutin
- A. N. Nesmeyanov Institute of Organoelement Compounds RAS, Vavilova ul., 28, Moscow 119991, Russia.
| | - V V Vasilevskaya
- A. N. Nesmeyanov Institute of Organoelement Compounds RAS, Vavilova ul., 28, Moscow 119991, Russia.
| | - A R Khokhlov
- A. N. Nesmeyanov Institute of Organoelement Compounds RAS, Vavilova ul., 28, Moscow 119991, Russia. and Faculty of Physics, M. V. Lomonosov Moscow State University, Leninskie gory, Moscow 119991, Russia
| |
Collapse
|
5
|
Larin DE, Govorun EN. Surfactant-Induced Patterns in Polymer Brushes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:8545-8552. [PMID: 28759241 DOI: 10.1021/acs.langmuir.7b01850] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The properties of surfaces with grafted macromolecules are determined by a fine structure of the macromolecular layer, whereas the mixtures of macromolecules with surfactants are very rich in structure types. Using the scaling mean-field theory, we consider the self-assembly in polymer brushes into various patterns induced by interactions with low-molecular surfactants. The interaction energies of the parts of a surfactant molecule with the polymer units are assumed to be greatly different. With increasing the grafting density, the formation of lamellae perpendicular to the grafting plane, a continuous layer with oblong or round pores, or a homogeneous brush is predicted. The driving force of the pattern formation is a gain in the interaction energy of surfactant molecules oriented at the lateral surfaces of lamellae or pores. The process of pore formation in a homogeneous brush caused by a temperature change at definite grafting densities is described as the first-order phase transition. It is accompanied by a stepwise extension of the brush and by orientational ordering of surfactant molecules. The transitions between the other patterns are of the second order. The thickness of lamellae and the distance between pores are approximately twice the surfactant molecule size except for the extremely high grafting densities. The diagrams of brush patterns are presented and discussed.
Collapse
Affiliation(s)
- Daniil E Larin
- Faculty of Physics, M. V. Lomonosov Moscow State University , Leninskie gory, Moscow, 119991 Russia
| | - Elena N Govorun
- Faculty of Physics, M. V. Lomonosov Moscow State University , Leninskie gory, Moscow, 119991 Russia
| |
Collapse
|
6
|
Chen D, Gelenter MD, Hong M, Cohen RE, McKinley GH. Icephobic Surfaces Induced by Interfacial Nonfrozen Water. ACS APPLIED MATERIALS & INTERFACES 2017; 9:4202-4214. [PMID: 28054770 PMCID: PMC6911363 DOI: 10.1021/acsami.6b13773] [Citation(s) in RCA: 71] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
It is known that smooth, hydrophobic solid surfaces exhibit low ice adhesion values, which have been shown to approach a lower ice adhesion strength limit (∼150 kPa) defined by the water receding contact angle. To overcome this limit, we have designed self-lubricating icephobic coatings by blending polydimethylsiloxane (PDMS)-poly(ethylene glycol) (PEG) amphiphilic copolymers into a polymer matrix. Such coatings provide low ice adhesion strength values (∼50 kPa) that can substantially reduce the lower bound of the ice adhesion strength achieved previously on smooth, hydrophobic solid surfaces. Different molecular mechanisms are responsible for the low ice adhesion strength attained by these two approaches. For the smooth hydrophobic surfaces, an increased water depletion layer thickness at the interface weakens the van der Waals' interactions between the ice and the polymeric substrate. For the self-lubricating icephobic coatings, the PEG component of the amphiphilic copolymer is capable of strongly hydrogen bonding with water molecules. The surface hydrogen-bonded water molecules do not freeze, even at substantial levels of subcooling, and therefore serve as a self-lubricating interfacial liquid-like layer that helps to reduce the adhesion strength of ice to the surface. The existence of nonfrozen water molecules at the ice-solid interface is confirmed by solid-state nuclear magnetic resonance (NMR) spectroscopy.
Collapse
Affiliation(s)
- Dayong Chen
- Department of Chemical Engineering, Massachusetts Institute of Technology
- Department of Mechanical Engineering, Massachusetts Institute of Technology
| | | | - Mei Hong
- Department of Chemistry, Massachusetts Institute of Technology
| | - Robert E. Cohen
- Department of Chemical Engineering, Massachusetts Institute of Technology
- Corresponding authors: Robert E. Cohen, Fax: 01 617 258 8224. , Gareth H. McKinley, Fax: 01 617 258 8559.
| | - Gareth H. McKinley
- Department of Mechanical Engineering, Massachusetts Institute of Technology
- Corresponding authors: Robert E. Cohen, Fax: 01 617 258 8224. , Gareth H. McKinley, Fax: 01 617 258 8559.
| |
Collapse
|
7
|
Larin DE, Lazutin AA, Govorun EN, Vasilevskaya VV. Self-Assembly into Strands in Amphiphilic Polymer Brushes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:7000-7008. [PMID: 27267357 DOI: 10.1021/acs.langmuir.6b01208] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The self-assembly of amphiphilic macromolecules end-grafted to a plane surface is studied using mean-field theory and computer simulations. Chain backbones are built from hydrophobic groups, whereas side groups are hydrophilic. The brush is immersed in a solvent, which can be good or poor, but on average is not far from θ conditions. It is demonstrated that the strong amphiphilicity of macromolecules at a monomer unit level leads to their self-assembly into a system of strands with a 2D hexagonal order in a cross-section parallel to the grafting plane. The structure period is determined by the length of side groups. In theory, this effect is explained by the orientation of strongly amphiphilic monomer units at a strand/solvent boundary that leads to an effective negative contribution to the surface tension. Computer simulations with molecular dynamics (MD) are used for a detailed study of the local brush structure. The aggregation number of strands grows with the increase of the grafting density and side group length.
Collapse
Affiliation(s)
- Daniil E Larin
- Faculty of Physics, M. V. Lomonosov Moscow State University , Leninskie gory, Moscow 119991, Russia
| | - Alexei A Lazutin
- A. N. Nesmeyanov Institute of Organoelement Compounds RAS , Vavilova str., 28, Moscow 119991, Russia
| | - Elena N Govorun
- Faculty of Physics, M. V. Lomonosov Moscow State University , Leninskie gory, Moscow 119991, Russia
| | - Valentina V Vasilevskaya
- A. N. Nesmeyanov Institute of Organoelement Compounds RAS , Vavilova str., 28, Moscow 119991, Russia
| |
Collapse
|
8
|
Fatona A, Chen Y, Reid M, Brook MA, Moran-Mirabal JM. One-step in-mould modification of PDMS surfaces and its application in the fabrication of self-driven microfluidic channels. LAB ON A CHIP 2015; 15:4322-4330. [PMID: 26400365 DOI: 10.1039/c5lc00741k] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Poly(dimethylsiloxane) (PDMS) has become the material of choice for fabricating microfluidic channels for lab-on-a-chip applications. Key challenges that limit the use of PDMS in microfluidic applications are its hydrophobic nature, and the difficulty in obtaining stable surface modifications. Although a number of approaches exist to render PDMS hydrophilic, they suffer from reversion to hydrophobicity and, frequently, surface cracking or roughening. In this study, we describe a one-step in-mould method for the chemical modification of PDMS surfaces, and its use to assess the ability of different surfactants to render PDMS surfaces hydrophilic. Thin films of ionic and non-ionic surfactants were patterned into an array format, transferred onto silicone pre-polymer, and subsequently immobilized onto the PDMS surface during vulcanization. The hydrophilicity of the resulting surfaces was assessed by contact angle measurements. The wettability was observed to be dependent on the chemical structure of the surfactants, their concentration and interactions with PDMS. The morphology of modified PDMS surfaces and their change after wetting and drying cycles were visualized using atomic force microscopy. Our results show that while all surfactants tested can render PDMS surfaces hydrophilic through the in-mould modification, only those modified with PEG-PDMS-PEG copolymer surfactants were stable over wetting/dying cycles and heat treatments. Finally, the in-mould functionalization approach was used to fabricate self-driven microfluidic devices that exhibited steady flow rates, which could be tuned by the device geometry. It is anticipated that the in-mould method can be applied to a range of surface modifications for applications in analytical separations, biosensing, cell isolation and small molecule discovery.
Collapse
Affiliation(s)
- Ayodele Fatona
- Department of Chemistry and Chemical Biology, McMaster University, 1280 Main St. W., Hamilton, Ontario, L8S 4M1 Canada.
| | - Yang Chen
- EnRoute Interfaces Inc., 1280 Main Street West, Hamilton, Ontario, L8S 4M1 Canada
| | - Michael Reid
- Department of Chemical Engineering, McMaster University, 1280 Main St. W., Hamilton, Ontario, L8S 4M1 Canada
| | - Michael A Brook
- Department of Chemistry and Chemical Biology, McMaster University, 1280 Main St. W., Hamilton, Ontario, L8S 4M1 Canada.
| | - Jose M Moran-Mirabal
- Department of Chemistry and Chemical Biology, McMaster University, 1280 Main St. W., Hamilton, Ontario, L8S 4M1 Canada.
| |
Collapse
|