Thermomechanical Tailoring of a DLP-Printable Shape Memory Polyurethane for Vascular Graft Applications.
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| Title: | Thermomechanical Tailoring of a DLP-Printable Shape Memory Polyurethane for Vascular Graft Applications. |
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| Authors: | Azğüler, Ozan1 (AUTHOR) ozanazguler@gmail.com, Ekşi Altan, Mihrigül1 (AUTHOR) |
| Source: | Materials (1996-1944). May2026, Vol. 19 Issue 9, p1862. 24p. |
| Subjects: | Vascular grafts, Polyurethane elastomers, Photopolymerization, Three-dimensional printing, Materials science, Acrylic resins, Thermodynamics |
| Abstract: | The increasing prevalence of cardiovascular diseases highlights the need to develop vascular grafts that match the mechanics of native vascular tissue and offer functional adaptability. This study reports the development and systematic optimization of a shape-memory polyurethane acrylate (PUA)-based photocurable resin for digital light processing (DLP)-based four-dimensional printing (4DP) applications. Resin formulations were designed by controlling hard/soft segment ratios, reactive diluent content, and crosslink density to position the glass transition temperature (Tg) within the physiological range (25–40 °C). Thermomechanical characterization was performed via dynamic mechanical analysis (DMA) and tensile testing, while a full-factorial Design of Experiments (DoE) approach was applied to optimize DLP process parameters—namely layer thickness, exposure time, and post-curing time. The developed resin formulation yielded a Tg of 38 °C as determined by DMA. Following process optimization, regression models showed high statistical fit (R2 > 99%), and experimental validation under optimal conditions (layer thickness: 82.83 µm, exposure time: 11 s, post-curing: 2 min) resulted in an elongation at break of 64.0 ± 3.4%, a Young's modulus of 10.9 ± 0.1 MPa, and a tensile strength of 6.2 ± 0.3 MPa. The optimized system exhibited thermally triggerable shape memory behavior at near-body temperature, with mechanical properties consistent with natural arterial tissue benchmarks. These findings demonstrate a promising material design strategy for DLP-based 4D-printed vascular structures. [ABSTRACT FROM AUTHOR] |
| Copyright of Materials (1996-1944) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
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| Header | DbId: egs DbLabel: Engineering Source An: 193715668 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Thermomechanical Tailoring of a DLP-Printable Shape Memory Polyurethane for Vascular Graft Applications. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Azğüler%2C+Ozan%22">Azğüler, Ozan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> ozanazguler@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Ekşi+Altan%2C+Mihrigül%22">Ekşi Altan, Mihrigül</searchLink><relatesTo>1</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Materials+%281996-1944%29%22">Materials (1996-1944)</searchLink>. May2026, Vol. 19 Issue 9, p1862. 24p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Vascular+grafts%22">Vascular grafts</searchLink><br /><searchLink fieldCode="DE" term="%22Polyurethane+elastomers%22">Polyurethane elastomers</searchLink><br /><searchLink fieldCode="DE" term="%22Photopolymerization%22">Photopolymerization</searchLink><br /><searchLink fieldCode="DE" term="%22Three-dimensional+printing%22">Three-dimensional printing</searchLink><br /><searchLink fieldCode="DE" term="%22Materials+science%22">Materials science</searchLink><br /><searchLink fieldCode="DE" term="%22Acrylic+resins%22">Acrylic resins</searchLink><br /><searchLink fieldCode="DE" term="%22Thermodynamics%22">Thermodynamics</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The increasing prevalence of cardiovascular diseases highlights the need to develop vascular grafts that match the mechanics of native vascular tissue and offer functional adaptability. This study reports the development and systematic optimization of a shape-memory polyurethane acrylate (PUA)-based photocurable resin for digital light processing (DLP)-based four-dimensional printing (4DP) applications. Resin formulations were designed by controlling hard/soft segment ratios, reactive diluent content, and crosslink density to position the glass transition temperature (Tg) within the physiological range (25–40 °C). Thermomechanical characterization was performed via dynamic mechanical analysis (DMA) and tensile testing, while a full-factorial Design of Experiments (DoE) approach was applied to optimize DLP process parameters—namely layer thickness, exposure time, and post-curing time. The developed resin formulation yielded a Tg of 38 °C as determined by DMA. Following process optimization, regression models showed high statistical fit (R2 > 99%), and experimental validation under optimal conditions (layer thickness: 82.83 µm, exposure time: 11 s, post-curing: 2 min) resulted in an elongation at break of 64.0 ± 3.4%, a Young's modulus of 10.9 ± 0.1 MPa, and a tensile strength of 6.2 ± 0.3 MPa. The optimized system exhibited thermally triggerable shape memory behavior at near-body temperature, with mechanical properties consistent with natural arterial tissue benchmarks. These findings demonstrate a promising material design strategy for DLP-based 4D-printed vascular structures. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Materials (1996-1944) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.3390/ma19091862 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 24 StartPage: 1862 Subjects: – SubjectFull: Vascular grafts Type: general – SubjectFull: Polyurethane elastomers Type: general – SubjectFull: Photopolymerization Type: general – SubjectFull: Three-dimensional printing Type: general – SubjectFull: Materials science Type: general – SubjectFull: Acrylic resins Type: general – SubjectFull: Thermodynamics Type: general Titles: – TitleFull: Thermomechanical Tailoring of a DLP-Printable Shape Memory Polyurethane for Vascular Graft Applications. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Azğüler, Ozan – PersonEntity: Name: NameFull: Ekşi Altan, Mihrigül IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 05 Text: May2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 19961944 Numbering: – Type: volume Value: 19 – Type: issue Value: 9 Titles: – TitleFull: Materials (1996-1944) Type: main |
| ResultId | 1 |
