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Analysis of UV Curing Strategy on Reaction Heat Control and Part Accuracy for Additive Manufacturing. Polymers (Basel) 2022; 14:polym14040759. [PMID: 35215672 PMCID: PMC8875315 DOI: 10.3390/polym14040759] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Revised: 02/12/2022] [Accepted: 02/13/2022] [Indexed: 12/27/2022] Open
Abstract
In this research, the relationship between the curing strategies and geometrical accuracy of parts under UV light was investigated. An IR camera was utilized to monitor the process using different combinations of photosensitive resin and curing strategies. The influences of curing strategies on different material compositions were studied with single-factor analysis. With the different exposure frequencies of the UV light, the peak temperature was adjusted to avoid overheating. The three-dimensional geometry of casting tensile bars was measured to investigate the shrinkage and warpage during the curing process. Different material compositions were also selected to study the effects of the maximum temperature on the shrinkage of the parts. The findings of this work show that, with the same amount of energy input, a more fragmented exposure allows for a more controllable max temperature, while one-time exposure leads to a high temperature during the process. With the decrease of the released heat from the reaction, the shrinkage of the casting part has a slightly increasing tendency. Moreover, the warpage of the parts decreased drastically with the decrease of temperature. The addition of fillers enhances the control over temperature and increases the geometrical accuracy.
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Suraj Belgaonkar M, Kandasubramanian B. Hyperbranched Polymer-based Nanocomposites: Synthesis, Progress, and Applications. Eur Polym J 2021. [DOI: 10.1016/j.eurpolymj.2021.110301] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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3
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Exner W, Hein R, Mahrholz T, Wierach P, Monner HP, Sinapius M. Impact of nanoparticles on the process-induced distortions of carbon fiber reinforced plastics: An experimental and simulative approach. J Appl Polym Sci 2018. [DOI: 10.1002/app.47031] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Wibke Exner
- Institute of Composite Structures and Adaptive Systems, DLR (German Aerospace Center); Lilienthalplatz 7, 38108 Braunschweig Germany
| | - Robert Hein
- Institute of Composite Structures and Adaptive Systems, DLR (German Aerospace Center); Lilienthalplatz 7, 38108 Braunschweig Germany
| | - Thorsten Mahrholz
- Institute of Composite Structures and Adaptive Systems, DLR (German Aerospace Center); Lilienthalplatz 7, 38108 Braunschweig Germany
| | - Peter Wierach
- Institute of Composite Structures and Adaptive Systems, DLR (German Aerospace Center); Lilienthalplatz 7, 38108 Braunschweig Germany
| | - Hans Peter Monner
- Institute of Composite Structures and Adaptive Systems, DLR (German Aerospace Center); Lilienthalplatz 7, 38108 Braunschweig Germany
| | - Michael Sinapius
- Institute of Composite Structures and Adaptive Systems, DLR (German Aerospace Center); Lilienthalplatz 7, 38108 Braunschweig Germany
- Institute of Adaptronics and Function Integration, Technische Universität Braunschweig; Langer Kamp 6, 38106 Braunschweig Germany
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Zhang J, Xu H, Hu L, Yang Y, Li H, Huang C, Liu X. Novel Waterborne UV-Curable Hyperbranched Polyurethane Acrylate/Silica with Good Printability and Rheological Properties Applicable to Flexographic Ink. ACS OMEGA 2017; 2:7546-7558. [PMID: 31457316 PMCID: PMC6644951 DOI: 10.1021/acsomega.7b00939] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Accepted: 10/11/2017] [Indexed: 06/10/2023]
Abstract
Novel waterborne UV-curable hyperbranched polyurethane acrylate/silica (HBWPUA/SiO2) nanocomposites were prepared by a three-step procedure and sol-gel method. 1H NMR and 13C NMR results indicate that HBWPU is successfully synthesized. Surface tension and contact angle tests both demonstrate the good wettability of the nanocomposites. Besides, the kinetics of photopolymerization of HBWPUA/SiO2 films were analyzed by attenuated total reflection-Fourier transform infrared spectroscopy, which reveals that the modified SiO2 could accelerate the curing speed of HBWPUA coatings. Thermal gravity analysis indicates that the HBWPUA/SiO2 hybrid films have a better thermal stability than the pure HBWPUA cured films. Furthermore, the hybrid films show enhanced pencil hardness, abrasion resistance, and adhesion. On the basis of the above, HBWPUA/SiO2 nanocomposites were finally applied to waterborne UV-curing flexographic printing ink, which is printed on poly(ethylene terephthalate) and glass. The nanocomposite presents good rheological behavior because the ink has a lower Z 0, a higher Z ∞, and the viscosity rebuild time is 375 s. Three colors (red, yellow, and blue) of ink were used to test its printing quality, the curing time was below 30 s, and the adhesion was excellent without being stripped. All of the inks show good water resistance and abrasion resistance. Moreover, the red and blue inks possess better solid densities than the value of 1.07 of yellow ink, and are 1.83 and 1.84, respectively. The current study suggests that the process has promise in applications of food packages.
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Affiliation(s)
- Jieyu Zhang
- School
of Printing and Packaging Engineering and College of Chemistry and Molecular
Sciences, Wuhan University, Wuhan 430072, P. R. China
| | - Hongping Xu
- School
of Printing and Packaging Engineering and College of Chemistry and Molecular
Sciences, Wuhan University, Wuhan 430072, P. R. China
| | - Ling Hu
- School
of Printing and Packaging Engineering and College of Chemistry and Molecular
Sciences, Wuhan University, Wuhan 430072, P. R. China
| | - Yao Yang
- School
of Publish and Media, Chongqing Business
Vocational College, Chongqing 404100, P. R. China
| | - Houbin Li
- School
of Printing and Packaging Engineering and College of Chemistry and Molecular
Sciences, Wuhan University, Wuhan 430072, P. R. China
| | - Chi Huang
- School
of Printing and Packaging Engineering and College of Chemistry and Molecular
Sciences, Wuhan University, Wuhan 430072, P. R. China
| | - Xinghai Liu
- School
of Printing and Packaging Engineering and College of Chemistry and Molecular
Sciences, Wuhan University, Wuhan 430072, P. R. China
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González Lazo MA, Katrantzis I, Dalle Vacche S, Karasu F, Leterrier Y. A Facile in Situ and UV Printing Process for Bioinspired Self-Cleaning Surfaces. MATERIALS (BASEL, SWITZERLAND) 2016; 9:E738. [PMID: 28773860 PMCID: PMC5457055 DOI: 10.3390/ma9090738] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Revised: 08/24/2016] [Accepted: 08/25/2016] [Indexed: 11/25/2022]
Abstract
A facile in situ and UV printing process was demonstrated to create self-cleaning synthetic replica of natural petals and leaves. The process relied on the spontaneous migration of a fluorinated acrylate surfactant (PFUA) within a low-shrinkage acrylated hyperbranched polymer (HBP) and its chemical immobilization at the polymer-air interface. Dilute concentrations of 1 wt. % PFUA saturated the polymer-air interface within 30 min, leading to a ten-fold increase of fluorine concentration at the surface compared with the initial bulk concentration and a water contact angle (WCA) of 108°. A 200 ms flash of UV light was used to chemically crosslink the PFUA at the HBP surface prior to UV printing with a polydimethylsiloxane (PDMS) negative template of red and yellow rose petals and lotus leaves. This flash immobilization hindered the reverse migration of PFUA within the bulk HBP upon contacting the PDMS template, and enabled to produce texturized surfaces with WCA well above 108°. The synthetic red rose petal was hydrophobic (WCA of 125°) and exhibited the adhesive petal effect. It was not superhydrophobic due to insufficient concentration of fluorine at its surface, a result of the very large increase of the surface of the printed texture. The synthetic yellow rose petal was quasi-superhydrophobic (WCA of 143°, roll-off angle of 10°) and its self-cleaning ability was not good also due to lack of fluorine. The synthetic lotus leaf did not accurately replicate the intricate nanotubular crystal structures of the plant. In spite of this, the fluorine concentration at the surface was high enough and the leaf was superhydrophobic (WCA of 151°, roll-off angle below 5°) and also featured self-cleaning properties.
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Affiliation(s)
- Marina A González Lazo
- Laboratoire de Technologie des Composites et Polymères (LTC), Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland.
| | - Ioannis Katrantzis
- Laboratoire de Technologie des Composites et Polymères (LTC), Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland.
| | - Sara Dalle Vacche
- Laboratoire de Technologie des Composites et Polymères (LTC), Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland.
| | - Feyza Karasu
- Laboratoire de Technologie des Composites et Polymères (LTC), Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland.
| | - Yves Leterrier
- Laboratoire de Technologie des Composites et Polymères (LTC), Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland.
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Galland S, Leterrier Y, Nardi T, Plummer CJG, Månson JAE, Berglund LA. UV-cured cellulose nanofiber composites with moisture durable oxygen barrier properties. J Appl Polym Sci 2014. [DOI: 10.1002/app.40604] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Sylvain Galland
- Department of Fiber and Polymer Technology; School of Chemical Science and Engineering, Royal Institute of Technology (KTH); 10044 Stockholm Sweden
- Wallenberg Wood Science Center (WWSC), Royal Institute of Technology (KTH); 10044 Stockholm Sweden
- Laboratoire de Technologie des Composites et Polymères (LTC), Ecole Polytechnique Fédérale de Lausanne (EPFL); CH-1015 Lausanne Switzerland
| | - Yves Leterrier
- Laboratoire de Technologie des Composites et Polymères (LTC), Ecole Polytechnique Fédérale de Lausanne (EPFL); CH-1015 Lausanne Switzerland
| | - Tommaso Nardi
- Laboratoire de Technologie des Composites et Polymères (LTC), Ecole Polytechnique Fédérale de Lausanne (EPFL); CH-1015 Lausanne Switzerland
| | - Christopher J. G. Plummer
- Laboratoire de Technologie des Composites et Polymères (LTC), Ecole Polytechnique Fédérale de Lausanne (EPFL); CH-1015 Lausanne Switzerland
| | - Jan Anders E. Månson
- Wallenberg Wood Science Center (WWSC), Royal Institute of Technology (KTH); 10044 Stockholm Sweden
| | - Lars A. Berglund
- Department of Fiber and Polymer Technology; School of Chemical Science and Engineering, Royal Institute of Technology (KTH); 10044 Stockholm Sweden
- Wallenberg Wood Science Center (WWSC), Royal Institute of Technology (KTH); 10044 Stockholm Sweden
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Nardi T, Sangermano M, Leterrier Y, Allia P, Tiberto P, Månson JAE. UV-cured transparent magnetic polymer nanocomposites. POLYMER 2013. [DOI: 10.1016/j.polymer.2013.06.052] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Golaz B, Michaud V, Leterrier Y, Månson JA. UV intensity, temperature and dark-curing effects in cationic photo-polymerization of a cycloaliphatic epoxy resin. POLYMER 2012. [DOI: 10.1016/j.polymer.2012.03.025] [Citation(s) in RCA: 77] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Ruggerone R, Geiser V, Dalle Vacche S, Leterrier Y, Månson JAE. Immobilized Polymer Fraction in Hyperbranched Polymer/Silica Nanocomposite Suspensions. Macromolecules 2010. [DOI: 10.1021/ma102074x] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Riccardo Ruggerone
- Laboratoire de Technologie des Composites et Polymères (LTC), Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Valérie Geiser
- Laboratoire de Technologie des Composites et Polymères (LTC), Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Sara Dalle Vacche
- Laboratoire de Technologie des Composites et Polymères (LTC), Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Yves Leterrier
- Laboratoire de Technologie des Composites et Polymères (LTC), Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Jan-Anders E. Månson
- Laboratoire de Technologie des Composites et Polymères (LTC), Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
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Geiser V, Leterrier Y, Månson JAE. Rheological Behavior of Concentrated Hyperbranched Polymer/Silica Nanocomposite Suspensions. Macromolecules 2010. [DOI: 10.1021/ma100569c] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Valérie Geiser
- Laboratoire de Technologie des Composites et Polymères (LTC), Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Yves Leterrier
- Laboratoire de Technologie des Composites et Polymères (LTC), Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Jan-Anders E. Månson
- Laboratoire de Technologie des Composites et Polymères (LTC), Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
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11
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Time-intensity superposition for photoinitiated polymerization of fluorinated and hyperbranched acrylate nanocomposites. POLYMER 2010. [DOI: 10.1016/j.polymer.2009.11.071] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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