Shape Memory Polymer Composites: 4D Printing, Smart Structures, and Applications

Yan, Shiyu; Zhang, Fenghua; Luo, Lan; Wang, Linlin; Liu, Yanju; Leng, Jinsong

doi:10.34133/research.0234

Cited by 22 publications

(2 citation statements)

References 167 publications

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“…Currently, 4D printing based on memory materials is already in development. 177,178 It is expected that as technology advances, many of the current problems will be resolved. The lack of standardized regulations for 3D printed medical products results in varying materials, printing technologies, and postprocessing methods among manufacturers, leading to inconsistent product quality.…”

Section: ■ Challenges and Potentialmentioning

confidence: 99%

“…By combining machine learning and artificial intelligence technologies, the design process can be automatically optimized to meet specific clinical needs and individual patient differences. Currently, 4D printing based on memory materials is already in development. , It is expected that as technology advances, many of the current problems will be resolved.…”

Section: Challenges and Potentialmentioning

confidence: 99%

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Three-Dimensional Printing Creates New Trends of the Technological Revolution in Urologic Surgery

Wu,

Wang,

et al. 2024

ACS Materials Lett.

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Additive manufacturing, commonly known as 3D printing, is a rapidly advancing technology with the capability to create intricate and precise structures. This technology has garnered significant attention in the medical field due to its ability to provide personalized diagnosis and treatment services. It finds applications in various areas, such as model printing, customized implants, and even organ printing. This review delves into the current uses of 3D printing in urology, including preoperative planning for surgeries, medical education, doctor− patient communication, and implant development. It also showcases examples of its utilization in both research and clinical settings. Moreover, the exploration of 3D printing for urethral repair and urinary organ reconstruction offers tailored solutions and the potential to replace conventional tissue engineering methods. The article provides an overview of the current applications of 3D printing technology in urology and discusses future prospects.

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Section: ■ Challenges and Potentialmentioning

confidence: 99%

Section: Challenges and Potentialmentioning

confidence: 99%

Three-Dimensional Printing Creates New Trends of the Technological Revolution in Urologic Surgery

Wu,

Wang,

et al. 2024

ACS Materials Lett.

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Structural Color Colloidal Photonic Crystals for Biomedical Applications

Zhang,

Hu,

Feng

et al. 2024

Advanced Science

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Photonic crystals are a new class of optical microstructure materials characterized by a dielectric constant that varies periodically with space and features a photonic bandgap. Inspired by natural photonic crystals such as butterfly scales, a series of artificial photonic crystals are developed for use in integrated photonic platforms, biosensing, communication, and other fields. Among them, colloidal photonic crystals (CPCs) have gained widespread attention due to their excellent optical properties and advantages, such as ease of preparation and functionalization. This work reviews the classification and self‐assembly principles of CPCs, details some of the latest biomedical applications of large‐area, high‐quality CPCs prepared using advanced self‐assembly methods, summarizes the existing challenges in CPC construction and application, and anticipates future development directions and optimization strategy. With further advancements, CPCs are expected to play a more critical role in biosensors, drug delivery, cell research, and other fields, bringing significant benefits to biomedical research and clinical practice.

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4D printing of heat‐stimulated shape memory polymer composite for high‐temperature smart structures/actuators applications

Kumar,

Ojha,

Ramesh

et al. 2024

Polymer Composites

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High temperature shape memory polymers (HT‐SMPs) have great utilization in self‐deployable hinges/morphing structures for space/aerospace, and high‐temperature sensors/actuators for electronics. However, HT‐SMPs have many drawbacks, such as low stiffness, strength, thermal stability, and dynamic mechanical properties. This work aims at improving these properties of highly utilized space grade HT‐SMP, PEKK (polyether ketone ketone), by reinforcing it with low‐cost carbon fibers (CFs), and developing its composite via additive manufacturing. The additively manufactured CF/PEKK composites are annealed at 200 °C (CF/PEKK‐A200) and 250 °C (CF/PEKK‐A250), and for the first time, investigated for shape memory effect (SME). The shape fixity and the shape recovery of the CF/PEKK‐UNA (un‐annealed), CF/PEKK‐A200, and CF/PEKK‐A250 are noted to be 95.97%, 88.95%, and 86.40%, and 88.70%, 92.70%, and 95.19%, respectively with a significant weight saving potential of ⁓21%. Dispersion of CFs in PEKK and suitability of processing parameters (blending, extrusion, and 3D printing) are confirmed through scanning electron microscopy (SEM). Thermal degradation temperature () of the printed CF/PEKK composite (⁓568 °C) is found to be ⁓3.5% higher than PEKK (⁓549 °C). CF/PEKK‐A250 exhibited the highest storage modulus (4438.23 MPa), ~158% higher than PEKK (1722.3 MPa), while CF/PEKK‐A200 demonstrated the highest tensile modulus (10.9 GPa), which is 138.5% higher than PEKK (4.57 GPa) and 312.88% higher than CF/PEKK‐UNA (2.64 GPa). Moreover, CF/PEKK‐A200 exhibited 237.46%, 138.51%, 127.08%, 61.48%, 32.93%, and 50.35% higher tensile modulus than PEEK, PEKK, PEK, CF/PEK, CF/PEEK, and CF/PEKK composites, respectively, showing great potential to replace them.Highlights Printed CF/PEKK composites are investigated for shape memory behavior. The printed composites exhibited outstanding shape memory properties. Printed‐A200 exhibited 138.51% enhanced tensile modulus than pure PEKK. Also, the printed‐A200 showed 313% enhanced modulus than printed‐UNA. (568 °C) of the printed composites is found ⁓4% greater than pure PEKK.

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Shape Memory Polymer Composites: 4D Printing, Smart Structures, and Applications

Cited by 22 publications

References 167 publications

Three-Dimensional Printing Creates New Trends of the Technological Revolution in Urologic Surgery

Three-Dimensional Printing Creates New Trends of the Technological Revolution in Urologic Surgery

Structural Color Colloidal Photonic Crystals for Biomedical Applications

4D printing of heat‐stimulated shape memory polymer composite for high‐temperature smart structures/actuators applications

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