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Wu SD, Hsu SH, Ketelsen B, Bittinger SC, Schlicke H, Weller H, Vossmeyer T. Fabrication of Eco-Friendly Wearable Strain Sensor Arrays via Facile Contact Printing for Healthcare Applications. SMALL METHODS 2023; 7:e2300170. [PMID: 37154264 DOI: 10.1002/smtd.202300170] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Revised: 03/28/2023] [Indexed: 05/10/2023]
Abstract
Wearable flexible strain sensors with spatial resolution enable the acquisition and analysis of complex actions for noninvasive personalized healthcare applications. To provide secure contact with skin and to avoid environmental pollution after usage, sensors with biocompatibility and biodegradability are highly desirable. Herein, wearable flexible strain sensors composed of crosslinked gold nanoparticle (GNP) thin films as the active conductive layer and transparent biodegradable polyurethane (PU) films as the flexible substrate are developed. The patterned GNP films (micrometer- to millimeter-scale square and rectangle geometry, alphabetic characters, and wave and array patterns) are transferred onto the biodegradable PU film via a facile, clean, rapid and high-precision contact printing method, without the need of a sacrificial polymer carrier or organic solvents. The GNP-PU strain sensor with low Young's modulus (≈17.8 MPa) and high stretchability showed good stability and durability (10 000 cycles) as well as degradability (42% weight loss after 17 days at 74 °C in water). The GNP-PU strain sensor arrays with spatiotemporal strain resolution are applied as wearable eco-friendly electronics for monitoring subtle physiological signals (e.g., mapping of arterial lines and sensing pulse waveforms) and large-strain actions (e.g., finger bending).
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Affiliation(s)
- Shin-Da Wu
- Institute of Polymer Science and Engineering, National Taiwan University, Taipei, 10617, Taiwan
- Institute of Physical Chemistry, University of Hamburg, 20146, Hamburg, Germany
| | - Shan-Hui Hsu
- Institute of Polymer Science and Engineering, National Taiwan University, Taipei, 10617, Taiwan
- Institute of Cellular and System Medicine, National Health Research Institutes, Miaoli, 35053, Taiwan
| | - Bendix Ketelsen
- Institute of Physical Chemistry, University of Hamburg, 20146, Hamburg, Germany
| | - Sophia C Bittinger
- Institute of Physical Chemistry, University of Hamburg, 20146, Hamburg, Germany
| | - Hendrik Schlicke
- Fraunhofer Center for Applied Nanotechnology CAN, 20146, Hamburg, Germany
| | - Horst Weller
- Institute of Physical Chemistry, University of Hamburg, 20146, Hamburg, Germany
- Fraunhofer Center for Applied Nanotechnology CAN, 20146, Hamburg, Germany
| | - Tobias Vossmeyer
- Institute of Physical Chemistry, University of Hamburg, 20146, Hamburg, Germany
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Boetje L, Lan X, van Dijken J, Polhuis M, Loos K. Synthesis and Properties of Fully Biobased Crosslinked Starch Oleate Films. Polymers (Basel) 2023; 15:polym15112467. [PMID: 37299266 DOI: 10.3390/polym15112467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Revised: 05/24/2023] [Accepted: 05/25/2023] [Indexed: 06/12/2023] Open
Abstract
Starch oleate (degree of substitution = 2.2) films were cast and crosslinked in the presence of air using UV curing (UVC) or heat curing (HC). A commercial photoinitiator (CPI, Irgacure 184) and a natural photoinitiator (NPI, a mixture of biobased 3-hydroxyflavone and n-phenylglycine) were used for UVC. No initiator was used during HC. Isothermal gravimetric analyses, Fourier Transform Infrared (FTIR) measurements, and gel content measurements revealed that all three methods were effective in crosslinking, with HC being the most efficient. All methods increased the maximum strengths of film, with HC causing the largest increase (from 4.14 to 7.37 MPa). This is consistent with a higher degree of crosslinking occurring with HC. DSC analyses showed that the Tg signal flattened as film crosslink densities increased, even disappearing in the case of HC and UVC with CPI. Thermal gravimetric analyses (TGA) indicated that films cured with NPI were least affected by degradation during curing. These results suggest that cured starch oleate films could be suitable for replacing the fossil-fuel-derived plastics currently used in mulch films or packaging applications.
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Affiliation(s)
- Laura Boetje
- Zernike Institute of Advanced Materials, University of Groningen, Nijenbogh 4, 9747AG Groningen, The Netherlands
| | - Xiaohong Lan
- Zernike Institute of Advanced Materials, University of Groningen, Nijenbogh 4, 9747AG Groningen, The Netherlands
| | - Jur van Dijken
- Zernike Institute of Advanced Materials, University of Groningen, Nijenbogh 4, 9747AG Groningen, The Netherlands
| | - Michael Polhuis
- Royal Avebe U.A., Zernikelaan 8, 9747AA Groningen, The Netherlands
| | - Katja Loos
- Zernike Institute of Advanced Materials, University of Groningen, Nijenbogh 4, 9747AG Groningen, The Netherlands
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Avadaiappan A, Antony SJPS, Franci B, Mahalingam U, Ramasamy P, Conchalish H, Sath V. Environmental photochemistry with thiol- and silica-modified plasmonic nanocomposites: SERS sensing of municipal solid waste and tannery waste leachate from groundwater. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:90023-90033. [PMID: 35861900 DOI: 10.1007/s11356-022-22058-0] [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: 02/16/2022] [Accepted: 07/12/2022] [Indexed: 06/15/2023]
Abstract
Mismanagement of obsolete solid waste generates a massive deteriorating effect on the environment. There is a high level of open trash disposal contaminating its neighboring water bodies. This despoliation trash causes an endangerment to the living environment. The waste management act is to hinder harmful effects on human beings, animals, plants, and their natural environment through the principles of waste prevention, waste processing, and waste disposal. Surface-enhanced Raman scattering (SERS) enhances the hazardous chemical sensing of environmental pollutants. To vigorously focus on the leaching of a couple of landfills in groundwater and surface water, an unusual combination of SERS-based poly vinyl thiol and silica-modified silver nanocomposites (PVT/SiO2@Ag NCs) was synthesized. The optical, crystalline, and structural properties of PVT/SiO2@Ag NCs were described with UV-visible spectroscopy (UV-Vis), X-ray diffractometer (XRD), transmission electron microscope (TEM), and energy-dispersive X-ray analysis (EDX). The surface plasmon resonance (SPR) is detected at 403 nm from the PVT/SiO2@Ag NPs. The average crystallite size of PVT/SiO2 @ Ag NCs is estimated using the Scherrer formula as 11 nm. The calculated specific surface area (SSA), strains, and dislocation densities demonstrate the improved mechanical properties of the substrate. The well-separated spherical shape of NPs is also observed, and the composition of silica and sulfur element in addition of Ag was confirmed by EDAX. Negatively charged SiO2 were bound strongly with the SH group and Ag NPs through electrostatic interaction mechanism as S-Ag-O-Si-O-Ag-S. SERS sensitivity is demonstrated by the prepared nanoparticles using an environmentally ignored leachate of municipal solid waste (MSW) and tannery waste (TW) landfill. PVT/SiO2@Ag NCs has detected the presence of innards of MSW leachate viz., aromatic hydrocarbon, phenols, phthalates, and pesticide from the groundwater. Furthermore, the TW leachate compositions of benzenes, hydrocarbons, amines, and chromium VI were analytically identified. Also, the leaching of TW leachate was confirmed in the water samples referred. Hence, this study provides a novel SERS sensor of PVT/SiO2@Ag NCs in the tile to detect and analyze environmentally ignored organic and inorganic compounds.
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Affiliation(s)
- Aarthi Avadaiappan
- Department of Physics, Mother Teresa Women's University, Kodaikanal, 624102, India
| | | | - Bindhu Franci
- Department of Physics, Sree Devi Kumari Women's College, Kuzhithurai, 629163, India
| | - Umadevi Mahalingam
- Department of Physics, Mother Teresa Women's University, Kodaikanal, 624102, India.
| | | | | | - Vasant Sath
- UGC - DAE Consortium for Scientific Research, Indore, India
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Dworakowska S, Cornille A, Bogdal D, Boutevin B, Caillol S. Thiol-Ene Coupling of High Oleic Sunflower Oil towards Application in the Modification of Flexible Polyurethane Foams. MATERIALS (BASEL, SWITZERLAND) 2022; 15:628. [PMID: 35057346 PMCID: PMC8777839 DOI: 10.3390/ma15020628] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Revised: 12/28/2021] [Accepted: 01/11/2022] [Indexed: 11/16/2022]
Abstract
High oleic sunflower oil-based polyol was obtained by thiol-ene coupling and applied in the preparation of flexible polyurethane foams. The photochemically initiated thiol-ene click reaction was carried out under UV irradiation using 2-mercaptoethanol. Bio-based polyol with hydroxyl value of 201.4 mg KOH/g was used as 30 wt% substituent of petrochemical polyether polyol in the formulations of flexible foams. Both reference foams, as well as foams modified with bio-based polyol, were formulated to have various isocyanate indices (0.85, 0.95, 1.05). Flexible foams were compared in terms of their thermomechanical properties and analyzed using FT-IR and SEM microscopy. Modification with bio-based polyol resulted in foams with superior compression properties, higher support factor, and lower resilience than reference foams. TGA and FT-IR curves confirmed the presence of urethane/urea and ether linkages in the polyurethane matrix. Moreover, double glass transition temperature corresponding to soft and hard segments of polyurethane was observed by DSC proving the phase-separated morphology.
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Affiliation(s)
- Sylwia Dworakowska
- Faculty of Chemical Engineering and Technology, Cracow University of Technology, Warszawska 24, 31-155 Cracow, Poland;
| | - Adrien Cornille
- ICGM, University of Montpellier, CNRS, ENSCM, 34000 Montpellier, France; (A.C.); (B.B.)
| | - Dariusz Bogdal
- Faculty of Chemical Engineering and Technology, Cracow University of Technology, Warszawska 24, 31-155 Cracow, Poland;
| | - Bernard Boutevin
- ICGM, University of Montpellier, CNRS, ENSCM, 34000 Montpellier, France; (A.C.); (B.B.)
| | - Sylvain Caillol
- ICGM, University of Montpellier, CNRS, ENSCM, 34000 Montpellier, France; (A.C.); (B.B.)
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Yuntawattana N, Gregory GL, Carrodeguas LP, Williams CK. Switchable Polymerization Catalysis Using a Tin(II) Catalyst and Commercial Monomers to Toughen Poly(l-lactide). ACS Macro Lett 2021; 10:774-779. [PMID: 34306820 PMCID: PMC8296665 DOI: 10.1021/acsmacrolett.1c00216] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Accepted: 06/02/2021] [Indexed: 12/15/2022]
Abstract
Sustainable plastics sourced without virgin petrochemicals, that are easily recyclable and with potential for degradation at end of life, are urgently needed. Here, copolymersand blends meeting these criteria are efficiently prepared using a single catalyst and existing commercial monomers l-lactide, propylene oxide, and maleic anhydride. The selective, one-reactor polymerization applies an industry-relevant tin(II) catalyst. Tapered, miscible block polyesters are formed with alkene groups which are postfunctionalized to modulate the polymer glass transition temperature. The polymers are blended at desirable low weight fractions (2 wt %) with commercial poly(l-lactide) (PLLA), increasing toughness, and elongation at break without compromising the elastic modulus, tensile strength, or thermal properties. The selective polymerization catalysis, using commercial monomers and catalyst, provides a straightforward means to improve bioplastics performances.
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Affiliation(s)
- Nattawut Yuntawattana
- Chemistry Research Laboratory,
Department of Chemistry, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, U.K.
| | - Georgina L. Gregory
- Chemistry Research Laboratory,
Department of Chemistry, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, U.K.
| | - Leticia Peña Carrodeguas
- Chemistry Research Laboratory,
Department of Chemistry, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, U.K.
| | - Charlotte K. Williams
- Chemistry Research Laboratory,
Department of Chemistry, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, U.K.
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Huang M, Bai D, Chen Q, Zhao C, Ren T, Huang C, North M, Xie H. Facile preparation of polycarbonates from bio-based eugenol and 2-methoxy-4-vinylphenol. Polym Chem 2020. [DOI: 10.1039/d0py00291g] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Polymerization of α,ω-diene functionalized carbonate monomers prepared from bio-based eugenol and 2-methoxy-4-vinylphenol through thiol–ene click and ADMET polymerizations produced polycarbonates with moderate molecular weight satisfactory thermal properties.
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Affiliation(s)
- Mengqian Huang
- Department of Polymeric Materials & Engineering
- College of Materials & Metallurgy
- Guizhou University
- West Campus
- Guizhou University
| | - De Bai
- Department of Polymeric Materials & Engineering
- College of Materials & Metallurgy
- Guizhou University
- West Campus
- Guizhou University
| | - Qin Chen
- Department of Polymeric Materials & Engineering
- College of Materials & Metallurgy
- Guizhou University
- West Campus
- Guizhou University
| | - Changbo Zhao
- Department of Polymeric Materials & Engineering
- College of Materials & Metallurgy
- Guizhou University
- West Campus
- Guizhou University
| | - Tianhua Ren
- Department of Polymeric Materials & Engineering
- College of Materials & Metallurgy
- Guizhou University
- West Campus
- Guizhou University
| | - Caijuan Huang
- Department of Polymeric Materials & Engineering
- College of Materials & Metallurgy
- Guizhou University
- West Campus
- Guizhou University
| | - Michael North
- Green Chemistry Centre of Excellence
- Department of Chemistry
- University of York
- York
- UK
| | - Haibo Xie
- Department of Polymeric Materials & Engineering
- College of Materials & Metallurgy
- Guizhou University
- West Campus
- Guizhou University
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Durand PL, Grau E, Cramail H. Bio-Based Thermo-Reversible Aliphatic Polycarbonate Network. Molecules 2019; 25:E74. [PMID: 31878284 PMCID: PMC6982953 DOI: 10.3390/molecules25010074] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Revised: 12/07/2019] [Accepted: 12/12/2019] [Indexed: 12/04/2022] Open
Abstract
Aliphatic polycarbonates represent an important class of materials with notable applications in the biomedical field. In this work, low Tg furan-functionalized bio-based aliphatic polycarbonates were cross-linked thanks to the Diels-Alder (DA) reaction with a bis-maleimide as the cross-linking agent. The thermo-reversible DA reaction allowed for the preparation of reversible cross-linked polycarbonate materials with tuneable properties as a function of the pendent furan content that was grafted on the polycarbonate backbone. The possibility to decrosslink the network around 70 °C could be an advantage for biomedical applications, despite the rather poor thermal stability of the furan-functionalized cross-linked polycarbonates.
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Affiliation(s)
| | | | - Henri Cramail
- CNRS, University Bordeaux, Bordeaux INP, LCPO, UMR 5629, F-33600 Pessac, France; (P.-L.D.); (E.G.)
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8
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Aromatic polyesters containing pendant azido groups: Synthesis, characterization, chemical modification and thermal cross-linking. Eur Polym J 2019. [DOI: 10.1016/j.eurpolymj.2019.04.019] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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