1
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Badiei YM, Annon O, Maldonado C, Delgado E, Nguyen C, Rivera C, Li C, Ortega AF. Single‐Site Molecular Ruthenium(II) Water‐Oxidation Catalysts Grafted into a Polymer‐Modified Surface for Improved Stability and Efficiency. ChemElectroChem 2023. [DOI: 10.1002/celc.202300028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Affiliation(s)
- Yosra M. Badiei
- Department of Chemistry Saint Peter's University 07306 Jersey City New Jersey USA
| | - Oshane Annon
- Department of Chemistry Saint Peter's University 07306 Jersey City New Jersey USA
| | - Christina Maldonado
- Department of Chemistry Saint Peter's University 07306 Jersey City New Jersey USA
| | - Emily Delgado
- Department of Chemistry Saint Peter's University 07306 Jersey City New Jersey USA
| | - Caroline Nguyen
- Department of Chemistry Saint Peter's University 07306 Jersey City New Jersey USA
| | - Christina Rivera
- Department of Chemistry Saint Peter's University 07306 Jersey City New Jersey USA
| | - Clive Li
- Department of STEM Hudson County Community College 07306 Jersey City NJ USA
| | - Abril Flores Ortega
- Department of Chemistry Saint Peter's University 07306 Jersey City New Jersey USA
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2
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Sareło P, Sobieszczańska B, Wysokińska E, Gąsior-Głogowska M, Kałas W, Podbielska H, Wawrzyńska M, Kopaczyńska M. In vitro examinations of the anti-inflammatory interleukin functionalized polydopamine based biomaterial as a potential coating for cardiovascular stents. Biocybern Biomed Eng 2023. [DOI: 10.1016/j.bbe.2023.02.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/27/2023]
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3
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Muyizere T, Mukiza J. Progress on the development of a metal salt-assisted ionization source for the mass spectrometric analysis of polymers. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2022; 14:2803-2819. [PMID: 35848110 DOI: 10.1039/d2ay00724j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The mass spectrometric analysis of polymers has been addressed as a challenging research topic due to poor ionization and complicated analysis using conventional mass spectrometry. The ionization source has demonstrated a promising future in rapid mass spectrometric analysis. Soft ionization techniques, such as electrospray ionization (ESI) and matrix-assisted laser desorption/ionization (MALDI) are the most ionization sources appeared to be a powerful tools for polymer characterization when combined with MS. However, they always need metal salts to be introduced during the ionization protocol for polymers due to the crucial role played by their ions (cations and anions). The current review focuses on the progress in the development of metal ion-assisted-ionization sources for the mass spectrometric analysis of polymers. Different ionization systems are comprehensively reviewed. The application of metal ion-assisted ESI, nanoESI, PSI, and MALDI-MS for polymer sample analyses is systematically discussed. The future research trends and challenges in this cutting-edge research field are summarized. It also aims to provide the current state-of-the-art of metal salts as a platform for ionization systems for the mass spectrometric characterization of polymers and offers the current challenges and perspectives on the promising future to improve analytical performance in this field. Finally, this mini-review provides a comprehensive handbook to researchers from different research backgrounds wishing to work in this area.
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Affiliation(s)
- Theoneste Muyizere
- University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, 100039, China
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, National Center for Nanoscience and Technology, No. 11 Beiyitiao, Zhongguancun, 100190 Beijing, China.
| | - Janvier Mukiza
- Rwanda Food and Drugs Authority, Kigali 1948, Rwanda.
- School of Education, College of Education, University of Rwanda, P. O. BOX 55, Rwamagana, Rwanda
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4
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Seidi F, Zhao W, Xiao H, Jin Y, Zhao C. Layer‐by‐Layer Assembly for Surface Tethering of Thin‐Hydrogel Films: Design Strategies and Applications. CHEM REC 2020; 20:857-881. [DOI: 10.1002/tcr.202000007] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2020] [Revised: 03/20/2020] [Accepted: 03/23/2020] [Indexed: 01/12/2023]
Affiliation(s)
- Farzad Seidi
- Provincial Key Lab of Pulp & Paper Sci and Tech, and Joint International Research Lab of Lignocellulosic Functional MaterialsNanjing Forestry University Nanjing 210037 China
| | - Weifeng Zhao
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials EngineeringSichuan University Chengdu 610065 China
| | - Huining Xiao
- Department of Chemical EngineeringUniversity of New Brunswick Fredericton NB E3B 5 A3 Canada
| | - Yongcan Jin
- Provincial Key Lab of Pulp & Paper Sci and Tech, and Joint International Research Lab of Lignocellulosic Functional MaterialsNanjing Forestry University Nanjing 210037 China
| | - Changsheng Zhao
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials EngineeringSichuan University Chengdu 610065 China
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5
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Lin W, Li M, Wang Y, Wang X, Xue K, Xiao K, Huang X. Quantifying the dynamic evolution of organic, inorganic and biological synergistic fouling during nanofiltration using statistical approaches. ENVIRONMENT INTERNATIONAL 2019; 133:105201. [PMID: 31675566 DOI: 10.1016/j.envint.2019.105201] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Revised: 09/13/2019] [Accepted: 09/19/2019] [Indexed: 06/10/2023]
Abstract
The dynamic process of membrane fouling was characterized during relatively long-term (30 d) continuous nanofiltration (NF) of a real wastewater secondary effluent, with the roles of organic, inorganic and biological foulants quantified via statistical analyses. The analyses were based on time-series data of physical properties (morphology, roughness, hydrophilicity and charge), chemical compositions (X-ray and infrared responses) and biomass (adenosine triphosphate, ATP) on the membrane surface during fouling evolution. The individual and interactive contributions of organic factor (typical functional groups), inorganic factor (Ca as a representative) and biological factor (ATP amount) to fouling were quantified via multiple linear regression coupled with variance partitioning analysis. About 78% of the variance of filtration resistance can be explained by these factors, among which 16% was contributed by individual effect of organics (via e.g. physical adsorption), 21% by organic-inorganic binary effect (in the form of e.g. Ca-complex), 13% by organic-biological binary effect (organics as the nutrient/product of microorganisms), and 24% by organic-inorganic-biological ternary interaction. Organic matter was universally involved in these effects. The interrelations among fouling factors, foulant layer properties and filtration time were comprehensively explored via redundancy analysis, which clearly delineated the fouling evolution into three major stages: Stage I (0-1 d) for initial fouling mainly due to rapid organic adsorption; Stage II (1-10 d) mainly for the gradual growth of Ca-organic combined fouling; and Stage III (10-30 d) for the eventual maturation of biofouling. These may provide foundations for a targeted fouling control based on foulant type or fouling stage.
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Affiliation(s)
- Weichen Lin
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Mengchen Li
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Yunhong Wang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Xiaomao Wang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Kai Xue
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Kang Xiao
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China; Research and Application Center for Membrane Technology, School of Environment, Tsinghua University, Beijing 100084, China.
| | - Xia Huang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China; Research and Application Center for Membrane Technology, School of Environment, Tsinghua University, Beijing 100084, China.
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6
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Guo H, Tang X, Ganschow G, Korshin GV. Differential ATR FTIR spectroscopy of membrane fouling: Contributions of the substrate/fouling films and correlations with transmembrane pressure. WATER RESEARCH 2019; 161:27-34. [PMID: 31170670 DOI: 10.1016/j.watres.2019.05.086] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2019] [Revised: 05/13/2019] [Accepted: 05/25/2019] [Indexed: 06/09/2023]
Abstract
This study examined the formation of fouling films deposited on the surface of a polyethersulfone (PES) membrane during the filtration of alginate solutions with various ionic strengths. Membrane fouling was characterized by changes of the transmembrane pressure (TMP) and ex situ measured attenuated total reflectance (ATR) Fourier-transform IR (FTIR) spectra at varying stages of filtration runs. The ATR spectra that comprise the vibration bands characteristic of the PES substrate and the deposited film were processed taking into the gradual weakening of the PES substrate-specific bands, whose intensity was shown to depend on the wavenumber of IR radiation and the thickness of the deposited layer. Strongly linear correlations between ratios of first derivatives intensity and wavenumbers of the PES reference lines were established. Calculations of the PES bands' attenuation coefficients allowed determining the apparent thickness and ATR FTIR vibrations of the fouling films per se. Strong correlations between TMP development and ATR-determined apparent thickness of the fouling layers were observed. The intensity of ATR absorbance at 3200 cm-1 was linearly correlated with TMP development for small TMP values before the point of rapidly developing failure of the hydraulic permeability of the system was reached.
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Affiliation(s)
- Hongguang Guo
- College of Architecture and Environment, Sichuan University, Chengdu, 610065, China; Department of Civil & Environmental Engineering, University of Washington, Box 352700, Seattle, WA, United States; Key Laboratory of Deep Earth Science and Engineering (Sichuan University), Ministry of Education, Chengdu, 610065, China.
| | - Xinyu Tang
- Department of Civil & Environmental Engineering, University of Washington, Box 352700, Seattle, WA, United States
| | - Gilbert Ganschow
- Department of Civil & Environmental Engineering, University of Washington, Box 352700, Seattle, WA, United States
| | - Gregory V Korshin
- Department of Civil & Environmental Engineering, University of Washington, Box 352700, Seattle, WA, United States
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7
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Investigation of plasticizer aggregation problem in casein based biopolymer using chemical imaging. Talanta 2019; 193:128-138. [DOI: 10.1016/j.talanta.2018.09.094] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Revised: 09/21/2018] [Accepted: 09/24/2018] [Indexed: 11/21/2022]
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8
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Pollakowski-Herrmann B, Hornemann A, Giovannozzi AM, Green F, Gunning P, Portesi C, Rossi A, Seim C, Steven R, Tyler B, Beckhoff B. A calibration procedure for a traceable contamination analysis on medical devices by combined X-ray spectrometry and ambient spectroscopic techniques. J Pharm Biomed Anal 2018; 150:308-317. [PMID: 29272815 DOI: 10.1016/j.jpba.2017.12.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Revised: 11/09/2017] [Accepted: 12/05/2017] [Indexed: 11/26/2022]
Abstract
There is a strong need in the medical device industry to decrease failure rates of biomedical devices by reducing the incidence of defect structures and contaminants during the production process. The detection and identification of defect structures and contaminants is crucial for many industrial applications. The present study exploits reference-free X-ray fluorescence (XRF) analysis as an analytical tool for the traceable characterization of surface contaminants of medical devices, in particular N,N'-ethylene-bis (stearamide), an ubiquitous compound used in many industrial applications as a release agent or friction reduction additive. Reference-free XRF analysis as primary method has been proven to be capable of underpinning all other applied methods since it yields the absolute mass deposition of the selected N,N'-ethylene-bis (stearamide) contaminant whilst X-ray absorption fine structure analysis determines the chemical species. Ambient vibrational spectroscopy and mass spectroscopy methodologies such as Fourier transform infrared, Raman, and secondary ion mass spectroscopy have been used in this systematic procedure providing an extensive range of complementary analyses. The calibration procedure described in this paper was developed using specially designed and fabricated model systems varying in thickness and substrate material. Furthermore, typical real medical devices such as both a polyethylene hip liner and a silver-coated wound dressing have been contaminated and investigated by these diverse methods, enabling testing of this developed procedure. These well-characterized samples may be used as calibration standards for bench top instrumentation from the perspective of providing traceable analysis of biomaterials and surface treatments. These findings demonstrate the potential importance and usefulness of combining complementary methods for a better understanding of the relevant organic materials.
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Affiliation(s)
| | - Andrea Hornemann
- Physikalisch-Technische Bundesanstalt (PTB), Abbestr. 2-12, 10587 Berlin, Germany
| | | | - Felicia Green
- National Physical Laboratory, Hampton Road, Teddington TW11 0LW, United Kingdom
| | - Paul Gunning
- Smith & Nephew, 101 Hessle Road, Hull, HU3 2BN, United Kingdom
| | - Chiara Portesi
- Quality of Life Division, INRIM, Strada delle Cacce 91, 10135 Torino, Italy
| | - Andrea Rossi
- Quality of Life Division, INRIM, Strada delle Cacce 91, 10135 Torino, Italy
| | - Christian Seim
- Physikalisch-Technische Bundesanstalt (PTB), Abbestr. 2-12, 10587 Berlin, Germany
| | - Rory Steven
- National Physical Laboratory, Hampton Road, Teddington TW11 0LW, United Kingdom
| | - Bonnie Tyler
- National Physical Laboratory, Hampton Road, Teddington TW11 0LW, United Kingdom
| | - Burkhard Beckhoff
- Physikalisch-Technische Bundesanstalt (PTB), Abbestr. 2-12, 10587 Berlin, Germany
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9
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OKADA M, INOUE K, IRIE M, TAKETA H, TORII Y, MATSUMOTO T. Resin adhesion strengths to zirconia ceramics after primer treatment with silane coupling monomer or oligomer. Dent Mater J 2017; 36:600-605. [DOI: 10.4012/dmj.2016-334] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Masahiro OKADA
- Department of Biomaterials, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University
| | - Kazusa INOUE
- Department of Biomaterials, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University
| | - Masao IRIE
- Department of Biomaterials, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University
| | - Hiroaki TAKETA
- Department of Comprehensive Dentistry, Okayama University Hospital
| | - Yasuhiro TORII
- Department of Comprehensive Dentistry, Okayama University Hospital
| | - Takuya MATSUMOTO
- Department of Biomaterials, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University
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10
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Lin L, Feng C, Lopez R, Coronell O. Identifying facile and accurate methods to measure the thickness of the active layers of thin-film composite membranes – A comparison of seven characterization techniques. J Memb Sci 2016. [DOI: 10.1016/j.memsci.2015.09.059] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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11
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12
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A review of recent trends in polymer characterization using non-destructive vibrational spectroscopic modalities and chemical imaging. Anal Chim Acta 2015; 895:12-34. [PMID: 26454456 DOI: 10.1016/j.aca.2015.09.006] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2015] [Revised: 08/31/2015] [Accepted: 09/01/2015] [Indexed: 11/23/2022]
Abstract
This review focuses on the recent developments in vibrational spectroscopy and chemical imaging (i.e. Raman, Near Infrared, Mid Infrared) to characterize polymers in diverse forms, their behaviour and transient phenomenon. First, important polymeric properties and traditional methods of their characterization are outlined. Then relative advantages & disadvantages have been presented of different characterization methods are presented. This is followed by a detailed review of applications of chemical imaging and spectroscopic techniques in polymer characterization, including the limitations encountered. The article ends with a discussion on the future of chemical imaging with regards to polymer characterization.
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13
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Next generation covered stents made from nanocomposite materials: A complete assessment of uniformity, integrity and biomechanical properties. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2015; 12:1-12. [PMID: 26238080 DOI: 10.1016/j.nano.2015.07.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2015] [Revised: 06/23/2015] [Accepted: 07/05/2015] [Indexed: 11/20/2022]
Abstract
Covered stents are stents wrapped with a thin polymeric membrane, and are typically used to treat vessel aneurysms and seal perforated arteries. Current covered stents suffer from restenosis due to limitations in material and fabrication methods which leaves metallic struts directly exposed to blood. We have developed a biocompatible and haemocompatible nanocomposite polymer, polyhedral oligomeric silsesquioxane poly(carbonate-urea) urethane (POSS-PCU). We devised a novel combination of ultrasonic spray atomisation system and dip-coating process to produce small calibre covered stents with metal struts fully embedded within the membrane, which also yields greater coating uniformity. Stent-polymer bonding was enhanced via silanisation and coating of reactive pre-polymer. Platelet studies supported the non-thrombogenicity of POSS-PCU. Biomechanical performances including diametrical compliance, bending strength, radial strength and recoil were evaluated and optimised. This proof-of-principle manufacturing technique could lead to the development of next-generation small calibre adult and paediatric covered stents. These stents are currently undergoing preclinical trial. From the Clinical Editor: The use of stents to treat vascular diseases is now the standard of care in the clinical setting. Nonetheless, a major problem of the current stents is the risk of restenosis and thrombosis. The authors developed a nanocomposite material using polyhedral oligomeric silsesquioxane and poly(carbonate-urea) urethane (POSS-PCU) and incorporated into metallic stents. Preliminary data have already shown promising results. It is envisaged that this would further lead to better stent technology in the future.
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14
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Croitoru C, Patachia S, Lunguleasa A. A mild method of wood impregnation with biopolymers and resins using 1-ethyl-3-methylimidazolium chloride as carrier. Chem Eng Res Des 2015. [DOI: 10.1016/j.cherd.2014.04.031] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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15
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Lin PC, Lin S, Wang PC, Sridhar R. Techniques for physicochemical characterization of nanomaterials. Biotechnol Adv 2014; 32:711-26. [PMID: 24252561 PMCID: PMC4024087 DOI: 10.1016/j.biotechadv.2013.11.006] [Citation(s) in RCA: 245] [Impact Index Per Article: 24.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2013] [Revised: 11/05/2013] [Accepted: 11/12/2013] [Indexed: 12/12/2022]
Abstract
Advances in nanotechnology have opened up a new era of diagnosis, prevention and treatment of diseases and traumatic injuries. Nanomaterials, including those with potential for clinical applications, possess novel physicochemical properties that have an impact on their physiological interactions, from the molecular level to the systemic level. There is a lack of standardized methodologies or regulatory protocols for detection or characterization of nanomaterials. This review summarizes the techniques that are commonly used to study the size, shape, surface properties, composition, purity and stability of nanomaterials, along with their advantages and disadvantages. At present there are no FDA guidelines that have been developed specifically for nanomaterial based formulations for diagnostic or therapeutic use. There is an urgent need for standardized protocols and procedures for the characterization of nanoparticles, especially those that are intended for use as theranostics.
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MESH Headings
- Chemistry, Physical/methods
- Circular Dichroism
- Contrast Media/chemistry
- Humans
- Light
- Magnetic Resonance Spectroscopy
- Mass Spectrometry
- Microscopy, Atomic Force
- Microscopy, Electron, Scanning
- Microscopy, Electron, Transmission
- Microscopy, Scanning Tunneling
- Molecular Imaging/methods
- Nanomedicine/methods
- Nanoparticles/chemistry
- Nanostructures/chemistry
- Nanotechnology/methods
- Nanotechnology/trends
- Scattering, Radiation
- Spectrometry, Fluorescence
- Spectrophotometry, Infrared
- Spectrum Analysis, Raman
- Surface Properties
- Technology, Pharmaceutical/methods
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Affiliation(s)
- Ping-Chang Lin
- Laboratory of Molecular Imaging, Department of Radiology, Howard University, Washington, DC 20060, USA
| | - Stephen Lin
- Laboratory of Molecular Imaging, Department of Radiology, Howard University, Washington, DC 20060, USA
| | - Paul C Wang
- Laboratory of Molecular Imaging, Department of Radiology, Howard University, Washington, DC 20060, USA
| | - Rajagopalan Sridhar
- Department of Radiation Oncology, Howard University, Washington, DC 20060, USA.
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16
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Sharma J, Zhang X, Sarker T, Yan X, Washburn L, Qu H, Guo Z, Kucknoor A, Wei S. Biocompatible electrospun tactic poly(methyl methacrylate) blend fibers. POLYMER 2014. [DOI: 10.1016/j.polymer.2014.05.028] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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17
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Lifetime prediction of NBR composite sheet in aviation kerosene by using nonlinear curve fitting of ATR-FTIR spectra. J IND ENG CHEM 2013. [DOI: 10.1016/j.jiec.2013.01.031] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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18
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Karabudak E, Kas R, Ogieglo W, Rafieian D, Schlautmann S, Lammertink RGH, Gardeniers HJGE, Mul G. Disposable Attenuated Total Reflection-Infrared Crystals from Silicon Wafer: A Versatile Approach to Surface Infrared Spectroscopy. Anal Chem 2012; 85:33-8. [DOI: 10.1021/ac302299g] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Engin Karabudak
- Mesoscale
Chemical Systems Group, ‡Photo Catalytic Synthesis Group, §Membrane Technology Group, ∥Soft Matter, Fluidics
and Interfaces, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede,
The Netherlands
| | - Recep Kas
- Mesoscale
Chemical Systems Group, ‡Photo Catalytic Synthesis Group, §Membrane Technology Group, ∥Soft Matter, Fluidics
and Interfaces, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede,
The Netherlands
| | - Wojciech Ogieglo
- Mesoscale
Chemical Systems Group, ‡Photo Catalytic Synthesis Group, §Membrane Technology Group, ∥Soft Matter, Fluidics
and Interfaces, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede,
The Netherlands
| | - Damon Rafieian
- Mesoscale
Chemical Systems Group, ‡Photo Catalytic Synthesis Group, §Membrane Technology Group, ∥Soft Matter, Fluidics
and Interfaces, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede,
The Netherlands
| | - Stefan Schlautmann
- Mesoscale
Chemical Systems Group, ‡Photo Catalytic Synthesis Group, §Membrane Technology Group, ∥Soft Matter, Fluidics
and Interfaces, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede,
The Netherlands
| | - R. G. H. Lammertink
- Mesoscale
Chemical Systems Group, ‡Photo Catalytic Synthesis Group, §Membrane Technology Group, ∥Soft Matter, Fluidics
and Interfaces, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede,
The Netherlands
| | - Han J. G. E. Gardeniers
- Mesoscale
Chemical Systems Group, ‡Photo Catalytic Synthesis Group, §Membrane Technology Group, ∥Soft Matter, Fluidics
and Interfaces, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede,
The Netherlands
| | - Guido Mul
- Mesoscale
Chemical Systems Group, ‡Photo Catalytic Synthesis Group, §Membrane Technology Group, ∥Soft Matter, Fluidics
and Interfaces, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede,
The Netherlands
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19
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Demirci S, Kinali-Demirci S, Caykara T. Surface chemical conversion of 3-glycidoxypropyldimethylethoxysilane on hydroxylated silicon surface: FT-IR, contact angle and ellipsometry analysis. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2012; 99:144-149. [PMID: 23063857 DOI: 10.1016/j.saa.2012.08.090] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2012] [Revised: 08/10/2012] [Accepted: 08/21/2012] [Indexed: 06/01/2023]
Abstract
The chemical conversion of the top surface of 3-glycidoxypropyldimethylethoxysilane (GPDMES) on hyroxylated silicon surface has been studied as a function of reaction time. A multiple-step procedure was applied in this study. At first, GPDMES molecules were self-assembled on the hydroxylated silicon surface. The second step was the modification of epoxy groups with 3,3'-iminodipropionitrile and the last step was the amidoximation reaction of nitrile groups. Existence of the monolayers covalently attached to silicon surfaces were revealed by X-ray photoelectron spectroscopy and Fourier transform infrared spectroscopy (FT-IR). Modification, conversion and thickness of surfaces were followed by FT-IR and ellipsometry analysis.
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Affiliation(s)
- Serkan Demirci
- Department of Chemistry, Amasya University, 05100 Amasya, Turkey.
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20
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Weinstock BA, Guiney LM, Loose C. Rapid, nondestructive estimation of surface polymer layer thickness using attenuated total reflection fourier transform infrared (ATR FT-IR) spectroscopy and synthetic spectra derived from optical principles. APPLIED SPECTROSCOPY 2012; 66:1311-1319. [PMID: 23146187 DOI: 10.1366/12-06734] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
We have developed a rapid, nondestructive analytical method that estimates the thickness of a surface polymer layer with high precision but unknown accuracy using a single attenuated total reflection Fourier transform infrared (ATR FT-IR) measurement. Because the method is rapid, nondestructive, and requires no sample preparation, it is ideal as a process analytical technique. Prior to implementation, the ATR FT-IR spectrum of the substrate layer pure component and the ATR FT-IR and real refractive index spectra of the surface layer pure component must be known. From these three input spectra a synthetic mid-infrared spectral matrix of surface layers 0 nm to 10,000 nm thick on substrate is created de novo. A minimum statistical distance match between a process sample's ATR FT-IR spectrum and the synthetic spectral matrix provides the thickness of that sample. We show that this method can be used to successfully estimate the thickness of polysulfobetaine surface modification, a hydrated polymeric surface layer covalently bonded onto a polyetherurethane substrate. A database of 1850 sample spectra was examined. Spectrochemical matrix-effect unknowns, such as the nonuniform and molecularly novel polysulfobetaine-polyetherurethane interface, were found to be minimal. A partial least squares regression analysis of the database spectra versus their thicknesses as calculated by the method described yielded an estimate of precision of ±52 nm.
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Choi J, Cho SB, Lee BS, Joung YK, Park K, Han DK. Improvement of interfacial adhesion of biodegradable polymers coated on metal surface by nanocoupling. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:14232-14239. [PMID: 22017569 DOI: 10.1021/la2030318] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
A method of securing the adhesion of biodegradable polymer coating was investigated for drug-eluting metal stents, using surface-initiated ring-opening polymerization (SI-ROP) of L-lactide. Introduction of oligolactide on the stainless steel (SS) surface was successful and the thickness of the oligolactide grafts remained on the nanometer scale, as determined by ellipsometry. The presence of an oligolactide graft was also identified using attenuated total reflection-Fourier transform infrared (ATR-FTIR) and electron spectroscopy for chemical analysis (ESCA). On top of the grafts, poly(D,L-lactide-co-glycolide) (PLGA) coating was carried out on different substrates such as SS control, plasma-treated SS, and lactide-grafted (referred to as a nanocoupled) SS using electrospraying. When the adhesion forces were measured with a scratch tester, the nanocoupled SS showed the strongest interfacial adhesion between polymer coating layer and metal substrate. The outcome of the peel-off test was also consistent with the result of the scratch test. When degradation behavior of the polymer coating in vitro was examined for up to 4 weeks in a continuous fluid flow, the SEM images demonstrated that polymer degradation was obvious due to hydration and swelling of the polymer matrix. Although the matrix completely disappeared after 4 weeks for SS control and plasma-treated substrates, the nanocoupled SS was persistent with some polymer matrix. In addition, the release profiles of SRL-loaded PLGA coating appeared slightly different between control and nanocoupled groups. This work suggested that the concept of nanocoupling remarkably improved the interfacial adhesion stability between metal surface and polymer layer and controlled drug release, and showed the feasibility of drug-eluting stents.
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Affiliation(s)
- Jiyeon Choi
- Center for Biomaterials, Korea Institute of Science and Technology, P.O. Box 131, Cheongryang, Seoul 130-650, Korea
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Kane SR, Ashby PD, Pruitt LA. Microscale wear behavior and crosslinking of PEG-like coatings for total hip replacements. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2010; 21:1037-45. [PMID: 20091104 PMCID: PMC2848970 DOI: 10.1007/s10856-009-3935-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/12/2009] [Accepted: 11/04/2009] [Indexed: 05/28/2023]
Abstract
The predominant cause of late-state failure of total hip replacements is wear-mediated osteolysis caused by wear particles that originate from the ultrahigh molecular weight polyethylene (UHMWPE) acetabular cup surface. One strategy for reducing wear particle formation from UHMWPE is to modify the surface with a hydrophilic coating to increase lubrication from synovial fluid. This study focuses on the wear behavior of hydrophilic coatings similar to poly(ethylene glycol) (PEG). The coatings were produced by plasma-polymerizing tetraglyme on UHMWPE in a chamber heated to 40 degrees C or 50 degrees C. Both temperatures yielded coatings with PEG-like chemistry and increased hydrophilicity relative to uncoated UHMWPE; however, the 40 degrees C coatings were significantly more resistant to damage induced by atomic force microscopy nanoscratching. The 40 degrees C coatings exhibited only one damage mode (delamination) and often showed no signs of damage after repeated scratching. In contrast, the 50 degrees C coatings exhibited three damage modes (roughening, thinning, and delamination), and always showed visible signs of damage after no more than two scratches. The greater wear resistance of the 40 degrees C coatings could not be explained by coating chemistry or hydrophilicity, but it corresponded to an approximately 26-32% greater degree of crosslinking relative to the 50 degrees C surfaces, suggesting that crosslinking should be a significant design consideration for hydrophilic coatings used for total hip replacements and other wear-dependent applications.
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Affiliation(s)
- Sheryl R. Kane
- Joint Graduate Group in Bioengineering, U.C. San Francisco and U.C. Berkeley, 5134 Etcheverry Hall, MC 1740, Berkeley, CA 94720 USA
| | - Paul D. Ashby
- Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 USA
| | - Lisa A. Pruitt
- Joint Graduate Group in Bioengineering, U.C. San Francisco and U.C. Berkeley, 5134 Etcheverry Hall, MC 1740, Berkeley, CA 94720 USA
- Mechanical Engineering, U.C. Berkeley, Berkeley, CA 94720 USA
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