Constitutive Modeling of multi-stimuli-responsive shape memory polymers with multi-functional capabilities

Baniasadi, Mahdi; Yarali, Ebrahim; Bodaghi, Mahdi; Zolfagharian, Ali; Baghani, Mostafa

doi:10.1016/j.ijmecsci.2020.106082

Cited by 38 publications

(12 citation statements)

References 55 publications

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“…Nowadays, shape memory polymers (SMPs) are widely recognized as a distinct class of smart materials which are capable of reverting to their original shape upon deformation when exposed to external stimuli like pH, light, and temperature. , These SMPs possess the ability to memorize their permanent shape, while they can efficiently recover their original configuration in the presence of such external triggers, even after being temporarily deformed. The exceptional responsiveness of SMPs has led to their extensive applications in the biomedical field, including their use as biological sutures, stent materials, bladder sensors, and tissue engineering scaffolds. − …”

Section: Resultsmentioning

confidence: 99%

Green Synthesis of Nonisocyanate Poly(ester urethanes) from Renewable Resources and Recycled Poly(ethylene terephthalate) Waste for Tissue Engineering Application

Ghosal,

Sarkar,

Chakraborty

et al. 2023

ACS Sustainable Chem. Eng.

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Since the remarkable discovery of polyurethanes (PU), significant progress has been made in their synthesis and processing, expanding their applications across various fields. However, the inclusion of isocyanates and the utilization of toxic catalysts for PU synthesis impose a significant challenge for their biomedical application. In this study, we present a novel approach: an isocyanate and catalyst-free melt polycondensation process for the preparation of a series of poly(ester urethanes). To synthesize the poly(ester urethanes), we have employed a combination of poly(ethylene terephthalate) (PET) waste-derived monomers and a diverse range of renewable resources, including oleic acid, ethylene carbonate, citric acid, sebacic acid, and mannitol. The synthesis of the poly(ester urethanes) was confirmed by FTIR spectroscopy and 1 H NMR spectroscopy, while the physicochemical properties of the poly(ester urethanes) were investigated using XRD, TGA, DSC, and UTM. The thermal characteristics, mechanical properties, and biodegradation behavior of the poly(ester urethanes) can be adjusted by simply changing the PET waste-derived diols. The mechanical characteristics of the synthesized poly(ester urethanes) closely resemble those of various soft tissues found in the human body, including articular cartilage, cervical spinal components, ligaments, aorta, and soft collagenous bone, indicating its promising potential for soft tissue engineering applications. In addition to that, the synthesized poly(ester urethanes) exhibited excellent shape memory behavior, along with a good recovery response at ambient temperature. Furthermore, the synthesized poly(ester urethanes) demonstrated certain levels of antimicrobial activity, exceptional in vitro cytocompatibility, and cell proliferation against mouse fibroblast cells (NIH/3T3) as confirmed by alamar blue and live/dead assays suggesting its potential soft tissue engineering applications.

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Section: Resultsmentioning

confidence: 99%

Green Synthesis of Nonisocyanate Poly(ester urethanes) from Renewable Resources and Recycled Poly(ethylene terephthalate) Waste for Tissue Engineering Application

Ghosal,

Sarkar,

Chakraborty

et al. 2023

ACS Sustainable Chem. Eng.

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“…To design the shape morphing controller for the CL4DP of the visor frame, the recovery process of the visor frame is modeled. The constitutive models of the SMP recovery process are deeply investigated in various studies 27 – 29 . In previous studies, we found that the relation between the strain rate and the strain of the SMP recovery process can also be expressed using a data-driven model as 22 , 26 : where t is the time, a , b , are the constants to be fitted with experimental data and are only related to the SMP property.…”

Section: Model and Controlmentioning

confidence: 99%

Customized protective visors enabled by closed loop controlled 4D printing

Wang

et al. 2022

Sci Rep

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The COVID-19 pandemic makes protective visors important for protecting people in close contacts. However, the production of visors cannot be increased greatly in a short time, especially at the beginning of the pandemic. The 3D printing community contributed largely in fabricating the visor frames using the rapid and adaptive manufacturing ability. While there are many open source designs of face visors for affordable 3D printers, all these designs fabricate mono-sized frames without considering diverse users’ dimensions. Here, a new method of visor post-processing technology enabled by closed loop controlled 4D printing is proposed. The new process can further deform the printed visor to any customized size for a more comfortable user experience. FEM analysis of the customized visor also shows consistent wearing experience in different circumstances compared with the old visor design. The fabrication precision and time cost of the method is studied experimentally. A case study regarding the reducing, reusing and recycling (3R) of customized visors in classrooms is proposed to enable the customized visors manufactured in a more sustainable way.

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“…Stimuli-responsive materials, which can reversibly switch their configurations in response to external stimuli, facilitate the invention of reconfigurable micro- and nanoscale features. , Even though the reconfigurable structures provide a facile strategy to achieve tunable adhesion characteristics, most of their intermediate structures cannot be preserved when the driving forces are removed. Over the years, the discovery of diverse shape memory polymers (SMP) renders a promising pathway to address this drawback of transient intermediate states. , The SMP-based structures can turn into rubbery states and be mechanically deformed above their glass-transition temperatures.…”

Section: Introductionmentioning

confidence: 99%

Self-Assembly of Hemimyzon Formosanus-Inspired Crescent-Shaped Nanosucker Arrays for Reversible Adhesion

Hsu,

Tang,

Hsu

et al. 2023

ACS Appl. Mater. Interfaces

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Constitutive Modeling of multi-stimuli-responsive shape memory polymers with multi-functional capabilities

Cited by 38 publications

References 55 publications

Green Synthesis of Nonisocyanate Poly(ester urethanes) from Renewable Resources and Recycled Poly(ethylene terephthalate) Waste for Tissue Engineering Application

Green Synthesis of Nonisocyanate Poly(ester urethanes) from Renewable Resources and Recycled Poly(ethylene terephthalate) Waste for Tissue Engineering Application

Customized protective visors enabled by closed loop controlled 4D printing

Self-Assembly of Hemimyzon Formosanus-Inspired Crescent-Shaped Nanosucker Arrays for Reversible Adhesion

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