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Bae JH, Won JC, Lim WB, Lee JH, Min JG, Kim SW, Kim JH, Huh P. Highly Flexible and Photo-Activating Acryl-Polyurethane for 3D Steric Architectures. Polymers (Basel) 2021; 13:polym13060844. [PMID: 33801858 PMCID: PMC7999262 DOI: 10.3390/polym13060844] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Revised: 03/04/2021] [Accepted: 03/08/2021] [Indexed: 12/15/2022] Open
Abstract
An acryl-functionalized polyurethane (PU) series was successfully synthesized using poly(tetramethylene ether) glycol-methylene diphenyl diisocyanate (PTMG-MDI) oligomer based on urethane methacrylates to control the flexibility of photo-cured 3D printing architectures. The mass ratio of acryl-urethane prepolymer: 1,4-butanediol (BD) chain-extender: diphenyl(2,4,6-trimethylbenzoyl) phosphine oxide (TPO) photoinitiator was 10:0.25:1. To produce suitably hard and precisely curved 3D architectures, the optimal UV absorbance and exposure energy of the acryl-PTMG-MDI resin were controlled precisely. Owing to the optimized viscosity of the acryl-PTMG-MDI resins, they could be printed readily by digital light processing (DLP) to form precisely curved 3D architectures after mixing with 1,6-hexanediol diacrylate (HDDA). The acryl-PTMG-MDI formulations showed much better flexural resolution than the neat resins. The printed 3D structure exhibited high surface hardness, good mechanical strength, and high elasticity for flexible applications in consumer/industrial and biomedical fields.
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Affiliation(s)
| | | | | | | | | | | | | | - PilHo Huh
- Correspondence: ; Tel.: +82-51-510-3637
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Bae JH, Won JC, Lim WB, Min JG, Lee JH, Kwon CR, Lee GH, Huh P. Synthesis and Characteristics of Eco-Friendly 3D Printing Material Based on Waterborne Polyurethane. Polymers (Basel) 2020; 13:polym13010044. [PMID: 33374360 PMCID: PMC7794856 DOI: 10.3390/polym13010044] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Revised: 12/17/2020] [Accepted: 12/23/2020] [Indexed: 11/23/2022] Open
Abstract
Photo-cured 3D architectures are successfully printed using the designed waterborne polyurethane-acrylate (WPUA) formulation. A WPUA series is synthesized in the presence of polycaprolactone diol (PCL) and 4,4′-methylene dicyclohexyl diisocyanate (H12MDI) as the soft segment part, dimethylolbutanoic acid (DMBA) as the emulsifier, and triethylamine (TEA) as the neutralizer, as a function of prepolymer molecular weight. The compatibility of WPUA and the photo-activating acryl monomer is as a key factor to guarantee the high resolution of 3D digital light processing (DLP) printing. The optimized blending formulations are tuned by using triacrylate monomers instead of diacrylate derivatives. For the high-accuracy and fine features of 3D DLP printing, WPUA are designed to be a suitable molecular structure for a 385 nm wavelength source, and the target viscosity is achieved in the range from 150 to 250 Cp. Photo-cured 3D architectures based on WPUA exhibit good flexural strength and high resolution.
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Affiliation(s)
| | | | | | | | | | | | | | - Pilho Huh
- Correspondence: ; Tel.: +82-51-510-3637
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Shie MY, Chang WC, Wei LJ, Huang YH, Chen CH, Shih CT, Chen YW, Shen YF. 3D Printing of Cytocompatible Water-Based Light-Cured Polyurethane with Hyaluronic Acid for Cartilage Tissue Engineering Applications. MATERIALS 2017; 10:ma10020136. [PMID: 28772498 PMCID: PMC5459153 DOI: 10.3390/ma10020136] [Citation(s) in RCA: 77] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Revised: 01/19/2017] [Accepted: 02/03/2017] [Indexed: 12/03/2022]
Abstract
Diseases in articular cartilages have affected millions of people globally. Although the biochemical and cellular composition of articular cartilages is relatively simple, there is a limitation in the self-repair ability of the cartilage. Therefore, developing strategies for cartilage repair is very important. Here, we report on a new liquid resin preparation process of water-based polyurethane based photosensitive materials with hyaluronic acid with application of the materials for 3D printed customized cartilage scaffolds. The scaffold has high cytocompatibility and is one that closely mimics the mechanical properties of articular cartilages. It is suitable for culturing human Wharton’s jelly mesenchymal stem cells (hWJMSCs) and the cells in this case showed an excellent chondrogenic differentiation capacity. We consider that the 3D printing hybrid scaffolds may have potential in customized tissue engineering and also facilitate the development of cartilage tissue engineering.
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Affiliation(s)
- Ming-You Shie
- 3D Printing Medical Research Center, China Medical University Hospital, China Medical University, Taichung 40447, Taiwan.
- School of Dentistry, China Medical University, Taichung 40447, Taiwan.
| | - Wen-Ching Chang
- 3D Printing Medical Research Center, China Medical University Hospital, China Medical University, Taichung 40447, Taiwan.
| | - Li-Ju Wei
- 3D Printing Medical Research Center, China Medical University Hospital, China Medical University, Taichung 40447, Taiwan.
| | - Yu-Hsin Huang
- 3D Printing Medical Research Center, China Medical University Hospital, China Medical University, Taichung 40447, Taiwan.
| | - Chien-Han Chen
- School of Medicine, College of Medicine, China Medical University, Taichung 40447, Taiwan.
| | - Cheng-Ting Shih
- 3D Printing Medical Research Center, China Medical University Hospital, China Medical University, Taichung 40447, Taiwan.
| | - Yi-Wen Chen
- 3D Printing Medical Research Center, China Medical University Hospital, China Medical University, Taichung 40447, Taiwan.
- Graduate Institute of Biomedical Sciences, China Medical University, Taichung 40447, Taiwan.
| | - Yu-Fang Shen
- 3D Printing Medical Research Center, China Medical University Hospital, China Medical University, Taichung 40447, Taiwan.
- Department of Bioinformatics and Medical Engineering, Asia University, Taichung 40447, Taiwan.
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