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Sadeghi K, Seo J. Ultraviolet-cured p-phenylenediamine functionalized polypropylene film as a non-migratory antioxidant. Food Packag Shelf Life 2022. [DOI: 10.1016/j.fpsl.2022.100907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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2
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Bacha TW, Manuguerra DC, Marano RA, Stanzione JF. Hydrophilic modification of SLA 3D printed droplet generators by photochemical grafting. RSC Adv 2021; 11:21745-21753. [PMID: 35478820 PMCID: PMC9034120 DOI: 10.1039/d1ra03057d] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Accepted: 06/05/2021] [Indexed: 12/05/2022] Open
Abstract
Few droplet generators manufactured using desktop stereolithography 3D printers have been reported in the literature. Moreover, 3D printed microfluidic chips are typically hydrophobic, limiting their application to water in oil droplets. Herein, we present designs for concentric and planar 3D printed microfluidic devices suitable for making polymeric microparticles using an off-the-shelf commercial stereolithography printer and resin. The devices consist of a microscope slide, binder clips, and printed components. Channels were modified by an ultraviolet grafting of methacrylic acid to the surface of chips, yielding a hydrophilic coating without modification to the bulk polymer. The water contact angle decreased from 97.0° to 25.4° after grafting. The presence of the coating was confirmed by microscopy and spectroscopy techniques. Polystyrene microparticles in the <100 μm size range were generated with varying molecular weights using the described microfluidic chips. Our work provides a facile method to construct droplet generators from commercial stereolithography printers and resins, and a rapid surface modification technique that has been under-utilized in 3D printed microfluidics. A wide range of microfluidic devices for other applications can be engineered using the methods described. A versatile method of manufacturing and directly modifying the surfaces of 3D printed microfluidic devices was developed. The device functionality was demonstrated by producing o/w emulsions that yielded polystyrene microspheres.![]()
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Affiliation(s)
- Tristan W Bacha
- Department of Chemical Engineering, Rowan University 201 Mullica Hill Rd, Glassboro NJ 08028 USA
| | - Dylan C Manuguerra
- Department of Chemical Engineering, Rowan University 201 Mullica Hill Rd, Glassboro NJ 08028 USA
| | - Robert A Marano
- Department of Chemical Engineering, Rowan University 201 Mullica Hill Rd, Glassboro NJ 08028 USA
| | - Joseph F Stanzione
- Department of Chemical Engineering, Rowan University 201 Mullica Hill Rd, Glassboro NJ 08028 USA
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3
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Yamada K, Takada A, Konishi A, Kimura Y, Asamoto H, Minamisawa H. Hexavalent Cr ion adsorption and desorption behaviour of expanded poly(tetrafluoro)ethylene films grafted with 2-(dimethylamino)ethyl methacrylate. ENVIRONMENTAL TECHNOLOGY 2021; 42:1885-1898. [PMID: 31631793 DOI: 10.1080/09593330.2019.1683612] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2019] [Accepted: 09/17/2019] [Indexed: 06/10/2023]
Abstract
A new polymeric adsorbent for Cr(VI) ions based on an expanded poly(tetrafluoroethylene) (ePTFE) film was prepared by the combined use of the pretreatment with oxygen plasma and photografting of 2-(dimethylamino)ethyl methacrylate (DMAEMA). The grafting of DMAEMA was characterized by XPS and FT-IR spectroscopic measurements. The adsorption behaviour of DMAEMA-grafted ePTFE (ePTFE-g-PDMAEMA) films was investigated as a function of the experimental parameters, such as the initial pH value, temperature, and grafted amount. The adsorption capacity and initial adsorption rate had the maximum values at the initial pH value of 3.0. On the other hand, the adsorption capacity became almost constant at temperatures higher than 30°C, although the adsorption rate increased over the temperature. The adsorption behaviour obeyed the pseudo-second-order kinetic model and well expressed by the Langmuir isotherm equation with higher correlation coefficients. These results indicate that the adsorption of Cr(VI) ions occurs through the electrostatic interaction between protonated dimethylamino groups on a grafted PDMAEMA chain and HCrO4- ions. Cr(VI) ions were successfully desorbed from Cr(VI)-loaded ePTFE-g-PDMAEMA films in the eluents, such as NaCl at 0.50 M, NH4Cl at 0.50M, and NaOH at 1.0 mM, and ePTFE-g-PDMAEMA films were repeatedly used for adsorption of Cr(VI) ions without appreciable loss in the adsorption capacity. It should be noted that Cr(VI) ion adsorptivity with a high initial rate was conferred to the ePTFE films. The results obtained in this study emphasize that ePTFE-g-PDMAEMA films can be applied as an adsorbent for Cr(VI) ions.
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Affiliation(s)
- Kazunori Yamada
- Department of Applied Molecular Chemistry, College of Industrial Technology, Nihon University, Narashino, Japan
| | - Asumi Takada
- Department of Applied Molecular Chemistry, College of Industrial Technology, Nihon University, Narashino, Japan
| | - Ayako Konishi
- Department of Applied Molecular Chemistry, College of Industrial Technology, Nihon University, Narashino, Japan
| | - Yuji Kimura
- Department of Applied Molecular Chemistry, College of Industrial Technology, Nihon University, Narashino, Japan
| | - Hiromichi Asamoto
- Department of Basic Science, College of Industrial Technology, Nihon University, Narashino, Japan
| | - Hiroaki Minamisawa
- Department of Basic Science, College of Industrial Technology, Nihon University, Narashino, Japan
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4
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Photografting of conducting polymer onto polymeric substrate as non-migratory antioxidant packaging. REACT FUNCT POLYM 2021. [DOI: 10.1016/j.reactfunctpolym.2020.104792] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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5
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Stöbener DD, Scholz J, Schedler U, Weinhart M. Switchable Oligo(glycidyl ether) Acrylate Bottlebrushes "Grafted-from" Polystyrene Surfaces: A Versatile Strategy toward Functional Cell Culture Substrates. Biomacromolecules 2018; 19:4207-4218. [PMID: 30339748 DOI: 10.1021/acs.biomac.8b00933] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Thermoresponsive brushes based on linear poly(glycidyl ether)s (PGEs) have already shown to be functional coatings for cell sheet fabrication. In here, we introduce a method to functionalize polystyrene (PS) tissue culture substrates with thermoresponsive coatings comprising glycidyl ether-based bottlebrush architectures. Utilizing the UV-induced "grafting-from" approach, thermoresponsive oligo(glycidyl ether) acrylate (OGEA) macromonomers were polymerized from PS substrates under bulk conditions. Applying ellipsometry, water contact angle (CA), and atomic force microscopy (AFM) measurements, we found that OGEA coatings exhibit a complex, gel-like structure comprising nanosized roughness and exhibit a temperature-dependent phase transition in water through the reversible hydration of OGEA bottlebrush side chains. To assess the utility of the coatings as functional substrates for cell sheet fabrication, human dermal fibroblast (HDF) adhesion and detachment were investigated. By adjusting the bottlebrush properties via the grafting procedure and coating structure, we were able to harvest confluent HDF sheets from functionalized PS substrates in a temperature-triggered, controlled manner. As the first report on surface-grafted bottlebrushes comprising thermoresponsive side chains with molecular weight of up to 1 kDa, this study demonstrates the potential of OGEA-based coatings for cell sheet fabrication.
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Affiliation(s)
- Daniel David Stöbener
- Institute for Chemistry and Biochemistry , Freie Universitaet Berlin , Takustrasse 3 , 14195 Berlin , Germany
| | - Johanna Scholz
- Institute for Chemistry and Biochemistry , Freie Universitaet Berlin , Takustrasse 3 , 14195 Berlin , Germany
| | - Uwe Schedler
- Institute for Chemistry and Biochemistry , Freie Universitaet Berlin , Takustrasse 3 , 14195 Berlin , Germany.,PolyAn GmbH , Rudolf-Baschant-Straße 2 , 13086 Berlin , Germany
| | - Marie Weinhart
- Institute for Chemistry and Biochemistry , Freie Universitaet Berlin , Takustrasse 3 , 14195 Berlin , Germany
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6
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Hauser AW, Hayward RC. Random photografting of polymers to nanoparticles for well-dispersed nanocomposites. ACTA ACUST UNITED AC 2015. [DOI: 10.1002/polb.23803] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Adam W. Hauser
- Department of Polymer Science and Engineering; University of Massachusetts Amherst; Amherst Massachusetts 01003
| | - Ryan C. Hayward
- Department of Polymer Science and Engineering; University of Massachusetts Amherst; Amherst Massachusetts 01003
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7
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Schmidt S, Wang H, Pussak D, Mosca S, Hartmann L. Probing multivalency in ligand–receptor-mediated adhesion of soft, biomimetic interfaces. Beilstein J Org Chem 2015; 11:720-9. [PMID: 26124875 PMCID: PMC4464160 DOI: 10.3762/bjoc.11.82] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2015] [Accepted: 04/28/2015] [Indexed: 12/15/2022] Open
Abstract
Many biological functions at cell level are mediated by the glycocalyx, a dense carbohydrate-presenting layer. In this layer specific interactions between carbohydrate ligands and protein receptors are formed to control cell–cell recognition, cell adhesion and related processes. The aim of this work is to shed light on the principles of complex formation between surface anchored carbohydrates and receptor surfaces by measuring the specific adhesion between surface bound mannose on a concanavalin A (ConA) layer via poly(ethylene glycol)-(PEG)-based soft colloidal probes (SCPs). Special emphasis is on the dependence of multivalent presentation and density of carbohydrate units on specific adhesion. Consequently, we first present a synthetic strategy that allows for controlled density variation of functional groups on the PEG scaffold using unsaturated carboxylic acids (crotonic acid, acrylic acid, methacrylic acid) as grafting units for mannose conjugation. We showed by a range of analytic techniques (ATR–FTIR, Raman microscopy, zeta potential and titration) that this synthetic strategy allows for straightforward variation in grafting density and grafting length enabling the controlled presentation of mannose units on the PEG network. Finally we determined the specific adhesion of PEG-network-conjugated mannose units on ConA surfaces as a function of density and grafting type. Remarkably, the results indicated the absence of a molecular-level enhancement of mannose/ConA interaction due to chelate- or subsite-binding. The results seem to support the fact that weak carbohydrate interactions at mechanically flexible interfaces hardly undergo multivalent binding but are simply mediated by the high number of ligand–receptor interactions.
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Affiliation(s)
- Stephan Schmidt
- Universität Leipzig, Institut für Biochemie, Johannisalle 21–23, D-04103 Leipzig, Germany
| | - Hanqing Wang
- Max Planck Institute of Colloids and Interfaces, Research Campus Golm, 14424 Potsdam, Germany
- Heinrich-Heine-Universität Düsseldorf, Institut für Organische und Makromolekulare Chemie, Universitätsstr. 1, 40225 Düsseldorf, Germany
| | - Daniel Pussak
- Max Planck Institute of Colloids and Interfaces, Research Campus Golm, 14424 Potsdam, Germany
| | - Simone Mosca
- Max Planck Institute of Colloids and Interfaces, Research Campus Golm, 14424 Potsdam, Germany
| | - Laura Hartmann
- Max Planck Institute of Colloids and Interfaces, Research Campus Golm, 14424 Potsdam, Germany
- Heinrich-Heine-Universität Düsseldorf, Institut für Organische und Makromolekulare Chemie, Universitätsstr. 1, 40225 Düsseldorf, Germany
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8
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Yang B, Duan X, Huang J. Ultrathin, biomimetic, superhydrophilic layers of cross-linked poly(phosphobetaine) on polyethylene by photografting. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:1120-1126. [PMID: 25549110 DOI: 10.1021/la5031137] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Ultrathin, biomimetic, superhydrophilic hydrogel layers, composed of cross-linked poly(2-methacryloyloxyethyl phosphorylcholine), are formed on low-density polyethylene films via ultraviolet-initiated surface graft polymerization. The layers are 19-58 nm thick as revealed by electron microscopy and have three-dimensional networks; the unique network structure, along with its zwitterionic nature, rather than surface roughness results in superhydrophilicity, that is, the water contact angle around 5°. This superhydrophilicity depends on a variety of factors, including the concentration of the monomer and cross-linker, the type of reaction solvents, the reaction and drying time, the intensity of UV light, and the way of measurement of water contact angles. Superhydrophilicity is obtained under a fixed ratio (e.g., 1/1) of the monomer to cross-linker, a reaction time over 120 s, a short drying time, (75%) ethanol as the reaction solvent, and low-intensity UV light, largely because these factors together generate optimal three-dimensional networks of cross-links.
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Affiliation(s)
- Biao Yang
- School of Materials Science and Mechanical Engineering, Beijing Technology and Business University , Beijing 100048, P. R. China
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9
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Papper V, Gorgy K, Elouarzaki K, Sukharaharja A, Cosnier S, Marks RS. Biofunctionalization of multiwalled carbon nanotubes by irradiation of electropolymerized poly(pyrrole-diazirine) films. Chemistry 2013; 19:9639-43. [PMID: 23754669 DOI: 10.1002/chem.201300873] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2013] [Indexed: 11/06/2022]
Abstract
A photoactivatable poly(pyrrole-diazirine) film was synthesized and electropolymerized as a versatile tool for covalent binding of laccase and glucose oxidase on multiwalled carbon nanotube coatings and Pt, respectively. Irradiation of the functionalized nanotubes allowed photochemical grafting of laccase and its subsequent direct electrical wiring, as illustrated by the electrocatalytic reduction of oxygen. Moreover, covalent binding of glucose oxidase as model enzyme, achieved by UV activation of electropolymerized pyrrole-diazirine, allowed a glucose biosensor to be realized. This original method to graft biomolecules combines electrochemical and photochemical techniques. The simplicity of this new method allows it to be extended easily to other biological systems.
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Affiliation(s)
- Vladislav Papper
- NTU CREATE, Research Wing #02-06, Nanyang Technological University, 138602, Singapore
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10
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Janes DW, Thode CJ, Willson CG, Nealey PF, Ellison CJ. Light-Activated Replication of Block Copolymer Fingerprint Patterns. Macromolecules 2013. [DOI: 10.1021/ma400065t] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Dustin W. Janes
- McKetta Department of Chemical
Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Christopher J. Thode
- Department of Chemical Engineering, The University of Wisconsin—Madison, Madison,
Wisconsin 53706, United States
| | - C. Grant Willson
- McKetta Department of Chemical
Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
- Department of Chemistry and Biochemistry, The University of Texas at Austin, Austin, Texas 78712,
United States
| | - Paul F. Nealey
- Institute
for Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United
States
| | - Christopher J. Ellison
- McKetta Department of Chemical
Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
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11
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Christensen SK, Chiappelli MC, Hayward RC. Gelation of Copolymers with Pendent Benzophenone Photo-Cross-Linkers. Macromolecules 2012. [DOI: 10.1021/ma300784d] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Scott K. Christensen
- Department of Polymer Science and
Engineering, University of Massachusetts—Amherst, Amherst,
Massachusetts 01003, United States
| | - Maria C. Chiappelli
- Department of Polymer Science and
Engineering, University of Massachusetts—Amherst, Amherst,
Massachusetts 01003, United States
| | - Ryan C. Hayward
- Department of Polymer Science and
Engineering, University of Massachusetts—Amherst, Amherst,
Massachusetts 01003, United States
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