1
|
Koguchi R, Jankova K, Tanaka Y, Yamamoto A, Murakami D, Yang Q, Ameduri B, Tanaka M. Altering the bio-inert properties of surfaces by fluorinated copolymers of mPEGMA. BIOMATERIALS ADVANCES 2023; 153:213573. [PMID: 37562157 DOI: 10.1016/j.bioadv.2023.213573] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Revised: 07/20/2023] [Accepted: 07/25/2023] [Indexed: 08/12/2023]
Abstract
Hydrophilic materials display "bio-inert properties", meaning that they are less recognized as foreign substances by proteins and cells. Such materials are often water soluble; therefore, one general approach to enable the use of these materials in various applications deals with copolymerizing hydrophilic monomers with hydrophobic ones to facilitate such resulting copolymers water insoluble. However, reducing the hydrophilic monomer amount may reduce the bio-inert properties of the material. The decrease in bio-inert properties can be avoided when small amounts of fluorine are used in copolymers with hydrophilic monomers, as presented in this article. Even in small quantities (7.9 wt%), the fluorinated monomer, 1,1,1,3,3,3-hexafluoropropan-2-yl 2-fluoroacrylate (FAHFiP), contributed to the improved hydrophobicity of the polymers of the long side-chain poly(ethylene glycol) methyl ether methacrylate (mPEGMA) bearing nine ethylene glycol units turning them water insoluble. As evidenced by the AFM deformation image, a phase separation between the FAHFiP and mPEGMA domains was observed. The copolymer with the highest amount of the fluorinated monomer (66.2 wt%) displayed also high (82 %) FAHFiP amount at the polymer-water interface. In contrast, the hydrated sample with the lowest FAHFiP/highest mPEGMA amount was enriched of three times more hydrophilic domains at the polymer-water interface compared to that of the sample with the highest FAHFiP content. Thus, by adding a small FAHFiP amount to mPEGMA copolymers, water insoluble in the bulk too, could be turned highly hydrophilic at the water interface. The high content of intermediate water contributed to their excellent bio-inert properties. Platelet adhesion and fibrinogen adsorption on their surfaces were even more decreased as compared to those on poly(2-methoxyethyl acrylate), which is typically used in medical devices.
Collapse
Affiliation(s)
- Ryohei Koguchi
- AGC Inc. Organic Materials Division, Materials Integration Laboratories, 1-1 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa 230-0045, Japan
| | - Katja Jankova
- Soft Materials Chemistry, Institute for Materials Chemistry and Engineering, Kyushu University, Build. CE41, 744 Motooka Nishi-ku, Fukuoka 819-0395, Japan; Department of Energy Conversion and Storage, Technical University of Denmark, Elektrovej, Build. 375, 2800 Kongens Lyngby, Denmark
| | - Yukiko Tanaka
- Soft Materials Chemistry, Institute for Materials Chemistry and Engineering, Kyushu University, Build. CE41, 744 Motooka Nishi-ku, Fukuoka 819-0395, Japan
| | - Aki Yamamoto
- Soft Materials Chemistry, Institute for Materials Chemistry and Engineering, Kyushu University, Build. CE41, 744 Motooka Nishi-ku, Fukuoka 819-0395, Japan
| | - Daiki Murakami
- Soft Materials Chemistry, Institute for Materials Chemistry and Engineering, Kyushu University, Build. CE41, 744 Motooka Nishi-ku, Fukuoka 819-0395, Japan
| | - Qizhi Yang
- University of Montpellier, ICGM, CNRS, ENSCM, 34000 Montpellier, France
| | - Bruno Ameduri
- University of Montpellier, ICGM, CNRS, ENSCM, 34000 Montpellier, France.
| | - Masaru Tanaka
- Soft Materials Chemistry, Institute for Materials Chemistry and Engineering, Kyushu University, Build. CE41, 744 Motooka Nishi-ku, Fukuoka 819-0395, Japan.
| |
Collapse
|
2
|
Gianetti MM, Guerra R, Vanossi A, Urbakh M, Manini N. Thermal Friction Enhancement in Zwitterionic Monolayers. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2022; 126:2797-2805. [PMID: 35178140 PMCID: PMC8842320 DOI: 10.1021/acs.jpcc.1c09542] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Revised: 01/19/2022] [Indexed: 06/14/2023]
Abstract
We introduce a model for zwitterionic monolayers and investigate its tribological response to changes in applied load, sliding velocity, and temperature by means of molecular-dynamics simulations. The proposed model exhibits different regimes of motion depending on temperature and sliding velocity. We find a remarkable increase of friction with temperature, which we attribute to the formation and rupture of transient bonds between individual molecules of opposite sliding layers, triggered by the out-of-plane thermal fluctuations of the molecules' orientations. To highlight the effect of the molecular charges, we compare these results with analogous simulations for the charge-free system. These findings are expected to be relevant to nanoscale rheology and tribology experiments of locally-charged lubricated systems such as, e.g., experiments performed on zwitterionic monolayers, phospholipid micelles, or confined polymeric brushes in a surface force apparatus.
Collapse
Affiliation(s)
- Melisa M. Gianetti
- Dipartimento
di Fisica, Università degli Studi
di Milano, Via Celoria 16, Milano 20133, Italy
| | - Roberto Guerra
- Center
for Complexity and Biosystems, Department of Physics, University of Milan, via Celoria 16, Milano 20133, Italy
| | - Andrea Vanossi
- CNR-IOM,
Consiglio Nazionale delle Ricerche, Istituto Officina dei Materiali, c/o SISSA, Via Bonomea 265, 34136 Trieste, Italy
- International
School for Advanced Studies (SISSA), Via Bonomea 265, 34136 Trieste, Italy
| | - Michael Urbakh
- Department
of Physical Chemistry, School of Chemistry, The Raymond and Beverly
Sackler Faculty of Exact Sciences and The Sackler Center for Computational
Molecular and Materials Science, Tel Aviv
University, Tel Aviv 6997801, Israel
| | - Nicola Manini
- Dipartimento
di Fisica, Università degli Studi
di Milano, Via Celoria 16, Milano 20133, Italy
| |
Collapse
|
3
|
Self-aggregation of poly(butadiene)- b -poly(2-vinylpyridine)- b -poly(ethylene oxide) triblock copolymers in heptane studied by viscometry and dynamic light scattering. CR CHIM 2017. [DOI: 10.1016/j.crci.2017.03.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
4
|
Shabbir A, Javakhishvili I, Cerveny S, Hvilsted S, Skov AL, Hassager O, Alvarez NJ. Linear Viscoelastic and Dielectric Relaxation Response of Unentangled UPy-Based Supramolecular Networks. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b00122] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Aamir Shabbir
- Department
of Chemical and Biochemical Engineering, Technical University of Denmark, Kgs. Lyngby 2800, Denmark
| | - Irakli Javakhishvili
- Department
of Chemical and Biochemical Engineering, Technical University of Denmark, Kgs. Lyngby 2800, Denmark
| | - Silvina Cerveny
- Centro de Física de Materiales (CFM CSIC/EHU) - Material Physics Centre (MPC), Paseo Manuel de
Lardizabal 5, San Sebastian 20018, Spain
| | - Søren Hvilsted
- Department
of Chemical and Biochemical Engineering, Technical University of Denmark, Kgs. Lyngby 2800, Denmark
| | - Anne L. Skov
- Department
of Chemical and Biochemical Engineering, Technical University of Denmark, Kgs. Lyngby 2800, Denmark
| | - Ole Hassager
- Department
of Chemical and Biochemical Engineering, Technical University of Denmark, Kgs. Lyngby 2800, Denmark
| | - Nicolas J. Alvarez
- Department
of Chemical and Biological Engineering, Drexel University, Philadelphia, Pennsylvania 19104, United States
| |
Collapse
|
5
|
Khan I, Umapathi R, Neves MC, Coutinho JAP, Venkatesu P. Structural insights into the effect of cholinium-based ionic liquids on the critical micellization temperature of aqueous triblock copolymers. Phys Chem Chem Phys 2016; 18:8342-51. [DOI: 10.1039/c5cp07079a] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
A symmetrical PEG–PPG–PEG triblock copolymer with 82.5% PEG as the hydrophilic end blocks, and PPG as the hydrophobic middle block, was chosen to study the effect of ionic liquids on the critical micellization temperature of block copolymers in aqueous solution.
Collapse
Affiliation(s)
- Imran Khan
- CICECO – Aveiro Institute of Materials, Chemistry Department
- University of Aveiro
- 3810-193 Aveiro
- Portugal
| | | | - Márcia C. Neves
- CICECO – Aveiro Institute of Materials, Chemistry Department
- University of Aveiro
- 3810-193 Aveiro
- Portugal
| | - João A. P. Coutinho
- CICECO – Aveiro Institute of Materials, Chemistry Department
- University of Aveiro
- 3810-193 Aveiro
- Portugal
| | | |
Collapse
|
6
|
Raftari M, Zhang ZJ, Carter SR, Leggett GJ, Geoghegan M. Nanoscale Contact Mechanics between Two Grafted Polyelectrolyte Surfaces. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b01540] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Maryam Raftari
- Department
of Physics and Astronomy, University of Sheffield, Hounsfield
Road, Sheffield S3 7RH, U.K
| | - Zhenyu J. Zhang
- Department
of Physics and Astronomy, University of Sheffield, Hounsfield
Road, Sheffield S3 7RH, U.K
- Department
of Chemistry, University of Sheffield, Brook Hill, Sheffield S3 7HF, U.K
| | - Steven R. Carter
- Department
of Physics and Astronomy, University of Sheffield, Hounsfield
Road, Sheffield S3 7RH, U.K
| | - Graham J. Leggett
- Department
of Chemistry, University of Sheffield, Brook Hill, Sheffield S3 7HF, U.K
| | - Mark Geoghegan
- Department
of Physics and Astronomy, University of Sheffield, Hounsfield
Road, Sheffield S3 7RH, U.K
| |
Collapse
|
7
|
Zappone B, Patil NJ, Madsen JB, Pakkanen KI, Lee S. Molecular Structure and Equilibrium Forces of Bovine Submaxillary Mucin Adsorbed at a Solid-Liquid Interface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:4524-4533. [PMID: 25806669 DOI: 10.1021/acs.langmuir.5b00548] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
By combining dynamic light scattering, circular dichroism spectroscopy, atomic force microscopy, and surface force apparatus, the conformation of bovine submaxillary mucin in dilute solution and nanomechanical properties of mucin layers adsorbed on mica have been investigated. The samples were prepared by additional chromatographic purification of commercially available products. The mucin molecule was found to have a z-average hydrodynamic diameter of ca. 35 nm in phosphate buffered solution, without any particular secondary or tertiary structure. The contour length of the mucin is larger than, yet of the same order of magnitude as the diameter, indicating that the molecule can be modeled as a relatively rigid polymeric chain due to the large persistence length of the central glycosylated domain. Mucin molecules adsorbed abundantly onto mica from saline buffer, generating polymer-like, long-ranged, repulsive, and nonhysteretic forces upon compression of the adsorbed layers. Detailed analysis of such forces suggests that adsorbed mucins had an elongated conformation favored by the stiffness of the central domain. Acidification of aqueous media was chosen as means to reduce mucin-mucin and mucin-substrate electrostatic interactions. The hydrodynamic diameter in solution did not significantly change when the pH was lowered, showing that the large persistence length of the mucin molecule is due to steric hindrance between sugar chains, rather than electrostatic interactions. Remarkably, the force generated by an adsorbed layer with a fixed surface coverage also remained unaltered upon acidification. This observation can be linked to the surface-protective, pH-resistant role of bovine submaxillary mucin in the variable environmental conditions of the oral cavity.
Collapse
Affiliation(s)
- Bruno Zappone
- †Consiglio Nazionale delle Ricerche - Istituto di Nanotecnologia (CNR-Nanotec) and LICRYL c/o Dipartimento di Fisica, Università della Calabria, cubo 33/B, Rende (CS) 87036 Italy
| | - Navinkumar J Patil
- §Dipartimento di Fisica, Università della Calabria, cubo 31/C, Rende (CS) 87036 Italy
| | - Jan B Madsen
- ‡Department of Mechanical Engineering, Technical University of Denmark, DK-2800, Kgs. Lyngby, Denmark
| | - Kirsi I Pakkanen
- ‡Department of Mechanical Engineering, Technical University of Denmark, DK-2800, Kgs. Lyngby, Denmark
| | - Seunghwan Lee
- ‡Department of Mechanical Engineering, Technical University of Denmark, DK-2800, Kgs. Lyngby, Denmark
| |
Collapse
|