The design of triple shape memory polymers with stable yet tunable temporary shapes by introducing photo-responsive units into a crystalline domain

Wu, Yongwei; Hu, Zhitao; Huang, Hui; Chen, Yongming

doi:10.1039/c8py01810c

Cited by 9 publications

(10 citation statements)

References 24 publications

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“…The results are summarized in Table 3, referring to the total shape fixity ratio (R f(A to B) ), shape recovery ratio R r(B to A ), and the ratios of first and second recovery steps. The second paper of Chen et al describes triple-shape-memory effect (triple-SME) in photoresponsive coumarin-containing PMCL as soft segments and poly(L-lactide) (PLLA) as hard segments (Figure 40a) [201]. Figure 40b shows a series of photographs visualizing a one-step deformation programming procedure as well as staged recoveries of shapes B and C, which demonstrate the triple-SME of PLLA-PMCL1.…”

Section: Shape-memory Polymers With Coumarin As Reactive Moietymentioning

confidence: 98%

“…Due to a wide range of availability of photoreactive molecules and good irradiation selectivity, photochemical activation is probably one of the most used stimuli in this field. Coumarin chromophores have been inserted into the polymer system such as polyesters [ 196 , 197 , 198 , 199 ], polyvinyl alcohol (PVA) [ 200 ], polyurethane [ 201 , 202 ], and poly(4-vinyl pyridine) [ 203 ].…”

Section: Shape-memory Polymers With Coumarin As Reactive Moietymentioning

confidence: 99%

“…The second paper of Chen et al describes triple-shape-memory effect (triple-SME) in photoresponsive coumarin-containing PMCL as soft segments and poly(L-lactide) (PLLA) as hard segments ( Figure 40 a) [ 201 ].…”

Section: Shape-memory Polymers With Coumarin As Reactive Moietymentioning

confidence: 99%

“…( b ) Visual demonstration of the triple-shape-memory performance of PLLA-PMCL. Republished with permission of the Royal Society of Chemistry, from [ 201 ]; permission conveyed through Copyright Clearance Centre, Inc.…”

Section: Figurementioning

confidence: 99%

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Recent Advances in Functional Polymers Containing Coumarin Chromophores

et al. 2020

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Natural and synthetic coumarin derivatives have gained increased attention in the design of functional polymers and polymer networks due to their unique optical, biological, and photochemical properties. This review provides a comprehensive overview over recent developments in macromolecular architecture and mainly covers examples from the literature published from 2004 to 2020. Along with a discussion on coumarin and its photochemical properties, we focus on polymers containing coumarin as a nonreactive moiety as well as polymer systems exploiting the dimerization and/or reversible nature of the [2πs + 2πs] cycloaddition reaction. Coumarin moieties undergo a reversible [2πs + 2πs] cycloaddition reaction upon irradiation with specific wavelengths in the UV region, which is applied to impart intrinsic healability, shape-memory, and reversible properties into polymers. In addition, coumarin chromophores are able to dimerize under the exposure to direct sunlight, which is a promising route for the synthesis and cross-linking of polymer systems under “green” and environment-friendly conditions. Along with the chemistry and design of coumarin functional polymers, we highlight various future application fields of coumarin containing polymers involving tissue engineering, drug delivery systems, soft robotics, or 4D printing applications.

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Section: Shape-memory Polymers With Coumarin As Reactive Moietymentioning

confidence: 98%

Section: Shape-memory Polymers With Coumarin As Reactive Moietymentioning

confidence: 99%

Section: Shape-memory Polymers With Coumarin As Reactive Moietymentioning

confidence: 99%

Section: Figurementioning

confidence: 99%

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Recent Advances in Functional Polymers Containing Coumarin Chromophores

et al. 2020

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“…On the other hand, coumarins have been inserted into other polymer systems such as PVA [127] or polyesters [128][129][130], achieving very encouraging results. However, it is not until the beginning of 2019 where the chemistry of coumarins was carried out within the polyurethane matrix in order to obtain shape memory materials [131,132]. In both cases, the coumarin insertion was carried out by the 'click' reaction.…”

Section: Shape Memory Polymersmentioning

confidence: 99%

Coumarins into Polyurethanes for Smart and Functional Materials

et al. 2020

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Polyurethanes are of undoubted interest for the scientific community and the industry. Their outstanding versatility from tailor-made structures turns them into major polymers for use in a wide range of different applications. As with other polymers, new, emerging molecules and monomers with specific attributes can provide new functions and capabilities to polyurethanes. Natural and synthetic coumarin and its derivatives are characterised by interesting biological, photophysical and photochemical properties. Then, the polyurethanes can exploit those features of many coumarins which are present in their composition to achieve new functions and performances. This article reviews the developments in the proper use of the special properties of coumarins in polyurethanes to produce functional and smart materials that can be suitable for new specific applications.

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Light and Shape‐Memory Polymers: Characterization, Preparation, Stimulation, and Application

Fang,

Yan,

Chen

et al. 2023

Macro Materials & Eng

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Shape‐memory polymers (SMPs) are smart materials that change shape when exposed to stimuli and have various applications in different fields due to their unique properties. Light, as a kind of electromagnetic radiation, plays an important role in understanding the structure‐property relations of SMPs, preparing original shapes, using them as non‐contact stimuli sources, and tuning the optical properties of SMPs. This review provides a comprehensive review of the involvement of light in structure‐preparation‐stimuli‐application of SMPs. The review is divided into four sections. First, applications of optical/spectroscopic approaches that provide information for understanding structure‐property relations in SMPs, especially during programming and recovery. Second, describes how to build SMPs with light, including different photochemical reactions and 3D photocuring technologies. Third, discusses how light is used to trigger the shape change of SMPs through both photochemical and photothermal mechanisms. Last, focuses on how to take advantage of the shape‐memory effect to tune the optical characteristics of polymers, including various structures of SMP color‐changing materials and their synthetic strategies. Future research could focus on developing efficient photothermal fillers, new 3D printing techniques for SMPs, exploring their use in biomedical and wearable devices, and optimizing SMPs for industrial applications.

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The design of triple shape memory polymers with stable yet tunable temporary shapes by introducing photo-responsive units into a crystalline domain

Abstract: A desirable triple-shape memory effect showing stable yet easily tunable temporary shapes is achieved using a physically crosslinked network with photo-responsive coumarin-containing poly(ε-caprolactone) as soft segments and poly(l-lactide) as hard segments.

Cited by 9 publications

References 24 publications

Recent Advances in Functional Polymers Containing Coumarin Chromophores

Recent Advances in Functional Polymers Containing Coumarin Chromophores

Coumarins into Polyurethanes for Smart and Functional Materials

Light and Shape‐Memory Polymers: Characterization, Preparation, Stimulation, and Application

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