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Schönfeld D, Koss S, Vohl N, Friess F, Drescher D, Pretsch T. Dual Stimuli-Responsive Orthodontic Aligners: An In Vitro Study. MATERIALS (BASEL, SWITZERLAND) 2023; 16:3094. [PMID: 37109929 PMCID: PMC10145520 DOI: 10.3390/ma16083094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 04/03/2023] [Accepted: 04/05/2023] [Indexed: 06/19/2023]
Abstract
Aligner therapy for orthodontic tooth movement is gaining importance in orthodontics. The aim of this contribution is to introduce a thermo- and water-responsive shape memory polymer (SMP), which could lay the foundation for a new type of aligner therapy. The thermal, thermo-mechanical, and shape memory properties of thermoplastic polyurethane were studied by means of differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA), and various practical experiments. The glass transition temperature of the SMP relevant for later switching was determined to be 50 °C in the DSC, while the tan δ peak was detected at 60 °C in the DMA. A biological evaluation was carried out using mouse fibroblast cells, which showed that the SMP is not cytotoxic in vitro. On a digitally designed and additively manufactured dental model, four aligners were fabricated from an injection-molded foil using a thermoforming process. The aligners were then heated and placed on a second denture model which had a malocclusion. After cooling, the aligners were in a programmed shape. The movement of a loose, artificial tooth and thus the correction of the malocclusion could be realized by thermal triggering the shape memory effect, at which the aligner corrected a displacement with an arc length of approximately 3.5 mm. The developed maximum force was separately determined to be about 1 N. Moreover, shape recovery of another aligner was realized within 20 h in 37 °C water. In perspective, the present approach can help to reduce the number of orthodontic aligners in therapy and thus avoid excessive material waste.
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Affiliation(s)
- Dennis Schönfeld
- Fraunhofer Institute for Applied Polymer Research IAP, Geiselbergstr. 69, 14476 Potsdam, Germany
| | - Samantha Koss
- Department of Orthodontics, Universitätsklinikum Düsseldorf, Moorenstr. 5, 40225 Düsseldorf, Germany
| | - Nils Vohl
- Department of Orthodontics, Universitätsklinikum Düsseldorf, Moorenstr. 5, 40225 Düsseldorf, Germany
| | - Fabian Friess
- Fraunhofer Institute for Applied Polymer Research IAP, Geiselbergstr. 69, 14476 Potsdam, Germany
| | - Dieter Drescher
- Department of Orthodontics, Universitätsklinikum Düsseldorf, Moorenstr. 5, 40225 Düsseldorf, Germany
| | - Thorsten Pretsch
- Fraunhofer Institute for Applied Polymer Research IAP, Geiselbergstr. 69, 14476 Potsdam, Germany
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Camadanli S, Hisir A, Dural S. Synthesis and performance of moisture curable solvent free silane terminated polyurethanes for coating and sealant applications. J Appl Polym Sci 2022. [DOI: 10.1002/app.51722] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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3
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Özparpucu M, Sánchez‐Ferrer A, Schuh M, Wilhelm B, Sarkar R, Reif B, Windeisen‐Holzhauser E, Richter K. Acidic wood extractives accelerate the curing process of emulsion polymer isocyanate adhesives. J Appl Polym Sci 2022. [DOI: 10.1002/app.52189] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Merve Özparpucu
- School of Life Sciences Weihenstephan, Chair of Wood Science Technical University of Munich Munich Germany
| | - Antoni Sánchez‐Ferrer
- School of Life Sciences Weihenstephan, Chair of Wood Science Technical University of Munich Munich Germany
| | - Mathias Schuh
- School of Life Sciences Weihenstephan, Chair of Wood Science Technical University of Munich Munich Germany
| | - Bianca Wilhelm
- School of Life Sciences Weihenstephan, Chair of Wood Science Technical University of Munich Munich Germany
| | - Riddhiman Sarkar
- Deutsches Forschungszentrum für Gesundheit und Umwelt Helmholtz‐Zentrum München (HMGU) Neuherberg Germany
- Department of Chemistry Technical University of Munich, Bayerisches NMR Zentrum (BNMRZ) Garching Germany
| | - Bernd Reif
- Deutsches Forschungszentrum für Gesundheit und Umwelt Helmholtz‐Zentrum München (HMGU) Neuherberg Germany
- Department of Chemistry Technical University of Munich, Bayerisches NMR Zentrum (BNMRZ) Garching Germany
| | | | - Klaus Richter
- School of Life Sciences Weihenstephan, Chair of Wood Science Technical University of Munich Munich Germany
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Jang D, Thompson CB, Chatterjee S, Korley LT. Engineering bio-inspired peptide-polyurea hybrids with thermo-responsive shape memory behaviour. MOLECULAR SYSTEMS DESIGN & ENGINEERING 2021; 6:1003-1015. [PMID: 35096418 PMCID: PMC8797660 DOI: 10.1039/d1me00043h] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Inspired by Nature's tunability driven by the modulation of structural organization, we utilize peptide motifs as an approach to tailor not only hierarchical structure, but also thermo-responsive shape memory properties of conventional polymeric materials. Specifically, poly(β-benzyl-L-aspartate)-b-poly(dimethylsiloxane)-b-poly(β-benzyl-L-aspartate) was incorporated as the soft segment in peptide-polyurea hybrids to manipulate hierarchical ordering through peptide secondary structure and a balance of inter- and intra-molecular hydrogen bonding. Employing these bioinspired peptidic polyureas, we investigated the influence of secondary structure on microphase-separated morphology, and shape fixity and recovery via attenuated total reflectance-Fourier transform infrared spectroscopy (ATR-FTIR), small-angle X-ray scattering (SAXS) and dynamic mechanical analysis (DMA). The β-sheet motifs promoted phase mixing through extensive inter-molecular hydrogen bonding between the hard block and peptide segments and provided an increased chain elasticity, resulting in decreased shape fixity compared to a non-peptidic control. In contrast, intra-molecular hydrogen bonding driven by the α-helical arrangements yielded a microphase-separated and hierarchically ordered morphology, leading to an increase in the shape fixing ratio. These results indicate that peptide secondary structure provides a convenient handle for tuning shape memory properties by regulating hydrogen bonding with the surrounding polyurea hard segment, wherein extent of hydrogen bonding and phase mixing between the peptidic block and hard segment dictate the resulting shape memory behaviour. Furthermore, the ability to shift secondary structure as a function of temperature was also demonstrated as a pathway to influence shape memory response. This research highlights that peptide secondary conformation influences the hierarchical ordering and modulates the shape memory response of peptide-polymer hybrids. We anticipate that these findings will enable the design of smart bio-inspired materials with responsive and tailored function via a balance of hydrogen bonding character, structural organization, and mechanics.
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Affiliation(s)
- Daseul Jang
- Department of Materials Science and Engineering, University of Delaware, 127 The Green, 201 Dupont Hall, Newark, DE. USA. 19716
| | - Chase B. Thompson
- Department of Materials Science and Engineering, University of Delaware, 127 The Green, 201 Dupont Hall, Newark, DE. USA. 19716
| | - Sourav Chatterjee
- Department of Materials Science and Engineering, University of Delaware, 127 The Green, 201 Dupont Hall, Newark, DE. USA. 19716
| | - LaShanda T.J. Korley
- Department of Materials Science and Engineering, University of Delaware, 127 The Green, 201 Dupont Hall, Newark, DE. USA. 19716
- Department of Chemical and Biomolecular Engineering, University of Delaware, 151 Academy St. Newark, DE, 19716
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5
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Platonova E, Chechenov I, Pavlov A, Solodilov V, Afanasyev E, Shapagin A, Polezhaev A. Thermally Remendable Polyurethane Network Cross-Linked via Reversible Diels-Alder Reaction. Polymers (Basel) 2021; 13:1935. [PMID: 34200958 PMCID: PMC8230680 DOI: 10.3390/polym13121935] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2021] [Revised: 06/02/2021] [Accepted: 06/06/2021] [Indexed: 11/21/2022] Open
Abstract
We prepared a series of thermally remendable and recyclable polyurethanes crosslinked via reversible furan-maleimide Diels-Alder reaction based on TDI end-caped branched Voranol 3138 terminated with difurfurylamine and 4,4'-bis(maleimido)diphenylmethane (BMI). We showed that Young modulus strongly depends on BMI content (from 8 to 250 MPa) that allows us to obtain materials of different elasticity as simple as varying BMI content. The ability of DA and retro-DA reactions between furan and maleimide to reversibly bind material components was investigated by NMR spectroscopy, differential scanning calorimetry, and recycle testing. All polymers obtained demonstrated high strengths and could be recovering without significant loss in mechanical properties for at least five reprocessing cycles.
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Affiliation(s)
- Elena Platonova
- Laboratory of Functional Composite Materials, Bauman Moscow State Technical University, 2nd Baumanskaya str., 5/1, 105005 Moscow, Russia; (E.P.); (I.C.); (V.S.)
| | - Islam Chechenov
- Laboratory of Functional Composite Materials, Bauman Moscow State Technical University, 2nd Baumanskaya str., 5/1, 105005 Moscow, Russia; (E.P.); (I.C.); (V.S.)
| | - Alexander Pavlov
- Laboratory for Nuclear Magnetic Resonance, A.N. Nesmeyanov Institute of Organoelement Compounds, Vavilova str., 28, 119334 Moscow, Russia;
| | - Vitaliy Solodilov
- Laboratory of Functional Composite Materials, Bauman Moscow State Technical University, 2nd Baumanskaya str., 5/1, 105005 Moscow, Russia; (E.P.); (I.C.); (V.S.)
- Laboratory of Reinforced Plastics, Semenov Institute of Chemical Physics, Russian Academy of Sciences, 119991 Moscow, Russia
| | - Egor Afanasyev
- Laboratory for Polymer Materials, A.N. Nesmeyanov Institute of Organoelement Compounds, Vavilova str., 28, 119334 Moscow, Russia;
| | - Alexey Shapagin
- Laboratory of Structural and Morphological Investigations, Frumkin Institute of Physical Chemistry and Electrochemistry, Leninsky Prospect 31, bld.4, 119071 Moscow, Russia;
| | - Alexander Polezhaev
- Laboratory of Functional Composite Materials, Bauman Moscow State Technical University, 2nd Baumanskaya str., 5/1, 105005 Moscow, Russia; (E.P.); (I.C.); (V.S.)
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Bae JH, Won JC, Lim WB, Kim BJ, Lee JH, Min JG, Seo MJ, Mo YH, Huh P. Tacky-Free Polyurethanes Pressure-Sensitive Adhesives by Molecular-Weight and HDI Trimer Design. MATERIALS (BASEL, SWITZERLAND) 2021; 14:2164. [PMID: 33922818 PMCID: PMC8123004 DOI: 10.3390/ma14092164] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 04/20/2021] [Accepted: 04/21/2021] [Indexed: 11/17/2022]
Abstract
Polyurethane pressure-sensitive adhesives (PU-PSAs) with satisfactory tack, cohesion, and removability were newly developed through the synthetic process by reacting methylene diisocyanate, poly(ethylene glycol) (PEG), and a 1,4-butanediol chain extender based on the different HDI/HDI trimer ratios. The sticking properties of PU-PSAs depended on both the HDI/HDI trimer ratio and crosslinking-agent composition in the formulation. The molecular weight (MW) dependence of adhesion in PU-PSA was observed in the range of 1000 < Mn < 3000, suggesting that the increase in MW limits the pressure-sensitive adhesion of these samples. The differences in the crosslinking-density significantly affected the cohesion, adhesion, and tack in PU-PSA. The formulation of 50 wt.% 600PEG and 50 wt.% crosslinking-agent and an HDI/HDI trimer ratio of 1.0 led to the optimal balance between the adhesion and cohesion properties owing to the sufficient tack, high 180-peel strength, and good cohesion.
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Affiliation(s)
| | | | | | | | | | | | | | | | - PilHo Huh
- Department of Polymer Science and Engineering, Pusan National University, Busan 609-735, Korea; (J.-H.B.); (J.C.W.); (W.B.L.); (B.J.K.); (J.H.L.); (J.G.M.); (M.J.S.); (Y.H.M.)
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7
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Arévalo-Alquichire S, Morales-Gonzalez M, Navas-Gómez K, Diaz LE, Gómez-Tejedor JA, Serrano MA, Valero MF. Influence of Polyol/Crosslinker Blend Composition on Phase Separation and Thermo-Mechanical Properties of Polyurethane Thin Films. Polymers (Basel) 2020; 12:polym12030666. [PMID: 32192093 PMCID: PMC7183071 DOI: 10.3390/polym12030666] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 03/09/2020] [Accepted: 03/10/2020] [Indexed: 12/01/2022] Open
Abstract
Polyurethanes (PUs) from Polyethylene glycol (PEG) and polycaprolactone diol (PCL) and a crosslinker, Pentaerythritol (PE), were synthetized with isophorone diisocyanate (IPDI). In this study, we investigated the effect of polyol and crosslinker composition on phase separation and thermo-mechanical properties. The properties were studied through dynamic mechanical analysis, X-ray scattering, atomic force microscopy (AFM), and thermogravimetric analysis (TGA). The results showed changes in PUs properties, microphase structure, and separation due to the composition of polyol/crosslinker blend. So, the largest concentration of PE produced multimodal loss factor patterns, indicating segment segregation while PUs with a PEG/PCL = 1 displayed a monomodal loss factor pattern, indicating a homogeneously distributed microphase separation. Additionally, the increase of the PEG concentration enhanced the damping capacity. On the other hand, agglomeration and thread-like structures of hard segments (HS) were observed through AFM. Finally, the thermal behavior of PUs was affected by chemical composition. Lower concentration of PE reduced the crosslinking; hence, the temperature with the maximum degradation rate.
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Affiliation(s)
- Said Arévalo-Alquichire
- Energy, Materials and Environmental Group, GEMA, Faculty of engineering, Universidad de La Sabana, 140013 Chía, Cundinamarca, Colombia; (S.A.-A.); (K.N.-G.)
- Doctoral program of biosciences, Universidad de La Sabana, 140013 Chía, Cundinamarca, Colombia
| | - Maria Morales-Gonzalez
- Energy, Materials and Environmental Group, GEMA, Faculty of engineering, Universidad de La Sabana, 140013 Chía, Cundinamarca, Colombia; (S.A.-A.); (K.N.-G.)
| | - Kelly Navas-Gómez
- Energy, Materials and Environmental Group, GEMA, Faculty of engineering, Universidad de La Sabana, 140013 Chía, Cundinamarca, Colombia; (S.A.-A.); (K.N.-G.)
| | - Luis E. Diaz
- Bioprospecting Research Group, GIBP, Faculty of engineering, Universidad de La Sabana, 140013 Chía, Cundinamarca, Colombia;
| | - José A. Gómez-Tejedor
- Centre for Biomaterials and Tissue Engineering, CBIT, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain; (J.A.G.-T.); (M.-A.S.)
- Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), 46022 Valencia, Spain
| | - María-Antonia Serrano
- Centre for Biomaterials and Tissue Engineering, CBIT, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain; (J.A.G.-T.); (M.-A.S.)
| | - Manuel F. Valero
- Energy, Materials and Environmental Group, GEMA, Faculty of engineering, Universidad de La Sabana, 140013 Chía, Cundinamarca, Colombia; (S.A.-A.); (K.N.-G.)
- Correspondence:
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Platonova EO, Vlasov E, Pavlov AA, Kireynov A, Nelyub VA, Polezhaev AV. Self‐healing polyurethane based on a difuranic monomer from biorenewable source. J Appl Polym Sci 2019. [DOI: 10.1002/app.47869] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Elena O. Platonova
- N.E. Bauman Moscow State Technical University 2nd Baumanskaya Street, 5/1 Moscow 105005, Russia
| | - Evgeny Vlasov
- N.E. Bauman Moscow State Technical University 2nd Baumanskaya Street, 5/1 Moscow 105005, Russia
| | - Alexander A. Pavlov
- A.N. Nesmeyanov Institute of Organoelement Compounds Vavilova Street, 28 Moscow 119334, Russia
| | - Alexey Kireynov
- N.E. Bauman Moscow State Technical University 2nd Baumanskaya Street, 5/1 Moscow 105005, Russia
| | - Vladimir A. Nelyub
- N.E. Bauman Moscow State Technical University 2nd Baumanskaya Street, 5/1 Moscow 105005, Russia
| | - Alexander V. Polezhaev
- N.E. Bauman Moscow State Technical University 2nd Baumanskaya Street, 5/1 Moscow 105005, Russia
- A.N. Nesmeyanov Institute of Organoelement Compounds Vavilova Street, 28 Moscow 119334, Russia
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9
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Es'haghi Z, Moeinpour F. Carbon nanotube/polyurethane modified hollow fiber-pencil graphite electrode for in situ concentration and electrochemical quantification of anticancer drugs Capecitabine and Erlotinib. Eng Life Sci 2019; 19:302-314. [PMID: 32625010 DOI: 10.1002/elsc.201800167] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2018] [Revised: 12/07/2018] [Accepted: 01/31/2019] [Indexed: 12/22/2022] Open
Abstract
A sensitive electrochemical sensor has been designed for in situ preconcentration and determination of anticancer drugs Capecitabine (CPT) and Erlotinib hydrochloride (ETHC) based on a pencil graphite electrode modified with multivalued carbon nanotube-polyurethane (MWCNT-PUFIX) nanocomposite that was supported with a piece of polypropylene hollow fiber (HF-PGE). The electrochemical behavior of CPT and ETHC on the MWCNT-PUFIX/HF-PGE modified electrode was investigated by differential pulse voltammetry (DPV) techniques and the obtained results confirmed its efficiency for sensing of CPT and ETHC. The synthesized nanocomposite was characterized by infrared spectroscopy and scanning electron microscope. After optimization of some effective parameters on the method efficiency including pH, nanocomposite amount, the type of organic solvent, scan rate and the effect of some additives, the mentioned sensor presented suitable results for determination of CPT and ETHC with the linear ranges from 7.70 to 142.00 μM and 0.11 to 23.50 μM and detection limits of 0.11 and 0.02 μM, respectively. Also, the fabricated sensor has shown good performance in analysis of CPT and ETHC in biological samples.
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Tan C, Luona V, Tirri T, Wilen CE. The Synthesis of Low-Viscosity Organotin-Free Moisture-Curable Silane-Terminated Poly(Urethane-Urea)s. Polymers (Basel) 2018; 10:E781. [PMID: 30960706 PMCID: PMC6403764 DOI: 10.3390/polym10070781] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2018] [Revised: 07/04/2018] [Accepted: 07/06/2018] [Indexed: 11/17/2022] Open
Abstract
This work explores the possibility of synthesizing moisture-curable silane-terminated poly(urethane-urea)s (SPURs) of low viscosity. First, NCO-terminated urethane prepolymers were prepared, followed by silane end-capping. The impact of polyol molecular weight and the ratio of isocyanate to polyol (NCO/OH) on viscosity and the properties of SPUR were examined. As alternatives to the organotin catalysts traditionally used for the polyurethane synthesis and curing processes, bismuth carboxylate catalysts were evaluated. In addition, the effect of organofunctional groups in the aminosilane structure (R1⁻NH⁻R2⁻Si(OR3)₃), i.e., R1 (alkyl, aryl or trimethoxysilyl-propyl), the spacer R2 (α or γ) and alkyl group R3 (methyl or ethyl), was examined. The chemical and physical structures of the SPUR were investigated by nuclear magnetic resonance spectroscopy (NMR), Fourier transform infrared spectroscopy (FT-IR) and the mechanical properties were evaluated by tensile tests. The results reveal that silane-terminated, moisture-curable polyurethanes can be successfully synthesized and cured with bismuth carboxylate catalysts. SPUR exhibiting low viscosity, with adequate tensile strength and elongation can be prepared using environmentally benign bismuth carboxylate catalyst having a high metal content of 19%⁻21%, by utilizing secondary aminosilane end-cappers and an optimal combination of the polyol molecular weight and NCO/OH ratio.
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Affiliation(s)
- Chen Tan
- Laboratory of Polymer Technology and Center for Functional Materials, Faculty of Science and Engineering/Chemical Engineering, Åbo Akademi University, Biskopsgatan 8, 20500 Turku, Finland.
| | - Viivi Luona
- Laboratory of Polymer Technology and Center for Functional Materials, Faculty of Science and Engineering/Chemical Engineering, Åbo Akademi University, Biskopsgatan 8, 20500 Turku, Finland.
| | - Teija Tirri
- Laboratory of Polymer Technology and Center for Functional Materials, Faculty of Science and Engineering/Chemical Engineering, Åbo Akademi University, Biskopsgatan 8, 20500 Turku, Finland.
| | - Carl-Eric Wilen
- Laboratory of Polymer Technology and Center for Functional Materials, Faculty of Science and Engineering/Chemical Engineering, Åbo Akademi University, Biskopsgatan 8, 20500 Turku, Finland.
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