Research on Shape Memory Properties of PETG Based on 4D-Printed Negative Poisson's Ratio Structures.
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| Title: | Research on Shape Memory Properties of PETG Based on 4D-Printed Negative Poisson's Ratio Structures. |
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| Authors: | Liu, Zepeng1 (AUTHOR), Liu, Shaogang2 (AUTHOR) liusg2006@tust.edu.cn, Chen, Bai1 (AUTHOR) |
| Source: | Polymers (20734360). May2026, Vol. 18 Issue 9, p1039. 27p. |
| Subjects: | Shape memory effect, Honeycomb structures, Soft robotics, Auxetic materials, Three-dimensional printing, Response surfaces (Statistics), Thermoplastic composites |
| Abstract: | This research systematically investigates the shape memory properties of re-entrant hexagonal negative Poisson's ratio (NPR) honeycomb structures fabricated via 4D printing, using polyethylene terephthalate glycol (PETG) and polylactic acid (PLA) as comparative materials. Periodic honeycomb models with varied wall thicknesses and structural unit angles were designed, and their effects on shape recovery time and recovery rate were examined. Response surface methodology (RSM) based on a Box–Behnken design was employed to optimize key process parameters, including the wall thickness, structural unit angle, and mold pressing angle. The results demonstrate that PETG exhibits significantly superior shape memory performance compared to PLA, characterized by a shorter recovery time and higher recovery rate under thermal stimulation. Through RSM optimization, the optimal parameter combination was identified as a wall thickness of 0.5 mm, a structural unit angle of 65°, and a mold pressing angle of 135°, which was subsequently validated experimentally, demonstrating a high degree of consistency between predicted and actual outcomes. This study not only clarifies the influence of the structural parameters on the shape memory behavior of NPR honeycomb systems but also provides parameter guidance and a practical experimental basis for the application of PETG in 4D-printed intelligent structures, with potential implications for soft robotics, aerospace, and biomedical devices. [ABSTRACT FROM AUTHOR] |
| Copyright of Polymers (20734360) 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: 193716174 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Research on Shape Memory Properties of PETG Based on 4D-Printed Negative Poisson's Ratio Structures. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Liu%2C+Zepeng%22">Liu, Zepeng</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Liu%2C+Shaogang%22">Liu, Shaogang</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> liusg2006@tust.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Chen%2C+Bai%22">Chen, Bai</searchLink><relatesTo>1</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Polymers+%2820734360%29%22">Polymers (20734360)</searchLink>. May2026, Vol. 18 Issue 9, p1039. 27p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Shape+memory+effect%22">Shape memory effect</searchLink><br /><searchLink fieldCode="DE" term="%22Honeycomb+structures%22">Honeycomb structures</searchLink><br /><searchLink fieldCode="DE" term="%22Soft+robotics%22">Soft robotics</searchLink><br /><searchLink fieldCode="DE" term="%22Auxetic+materials%22">Auxetic materials</searchLink><br /><searchLink fieldCode="DE" term="%22Three-dimensional+printing%22">Three-dimensional printing</searchLink><br /><searchLink fieldCode="DE" term="%22Response+surfaces+%28Statistics%29%22">Response surfaces (Statistics)</searchLink><br /><searchLink fieldCode="DE" term="%22Thermoplastic+composites%22">Thermoplastic composites</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: This research systematically investigates the shape memory properties of re-entrant hexagonal negative Poisson's ratio (NPR) honeycomb structures fabricated via 4D printing, using polyethylene terephthalate glycol (PETG) and polylactic acid (PLA) as comparative materials. Periodic honeycomb models with varied wall thicknesses and structural unit angles were designed, and their effects on shape recovery time and recovery rate were examined. Response surface methodology (RSM) based on a Box–Behnken design was employed to optimize key process parameters, including the wall thickness, structural unit angle, and mold pressing angle. The results demonstrate that PETG exhibits significantly superior shape memory performance compared to PLA, characterized by a shorter recovery time and higher recovery rate under thermal stimulation. Through RSM optimization, the optimal parameter combination was identified as a wall thickness of 0.5 mm, a structural unit angle of 65°, and a mold pressing angle of 135°, which was subsequently validated experimentally, demonstrating a high degree of consistency between predicted and actual outcomes. This study not only clarifies the influence of the structural parameters on the shape memory behavior of NPR honeycomb systems but also provides parameter guidance and a practical experimental basis for the application of PETG in 4D-printed intelligent structures, with potential implications for soft robotics, aerospace, and biomedical devices. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Polymers (20734360) 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/polym18091039 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 27 StartPage: 1039 Subjects: – SubjectFull: Shape memory effect Type: general – SubjectFull: Honeycomb structures Type: general – SubjectFull: Soft robotics Type: general – SubjectFull: Auxetic materials Type: general – SubjectFull: Three-dimensional printing Type: general – SubjectFull: Response surfaces (Statistics) Type: general – SubjectFull: Thermoplastic composites Type: general Titles: – TitleFull: Research on Shape Memory Properties of PETG Based on 4D-Printed Negative Poisson's Ratio Structures. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Liu, Zepeng – PersonEntity: Name: NameFull: Liu, Shaogang – PersonEntity: Name: NameFull: Chen, Bai IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 05 Text: May2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 20734360 Numbering: – Type: volume Value: 18 – Type: issue Value: 9 Titles: – TitleFull: Polymers (20734360) Type: main |
| ResultId | 1 |
