Remotely actuated shape memory effect of electrospun composite nanofibers

Gong, Tao; Li, Wenbing; Chen, Hongmei; Wang, Lin; Shao, Shijun; Zhou, Shaobing

doi:10.1016/j.actbio.2011.12.006

Cited by 130 publications

(119 citation statements)

References 60 publications

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“…For this purpose suitable inorganic nanofillers are incorporated. The possibility of remote actuation will be extended for the SM performance of nanostructures such as electrospun nanofiber structures [71]. Chemically-induced SM functions, especially those triggered by water swelling and dissolution, will be investigated.…”

Section: Resultsmentioning

confidence: 99%

Biodegradable polyester-based shape memory polymers: Concepts of (supra)molecular architecturing

Karger‐Kocsis

Kéki

2014

Express Polym. Lett.

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Shape memory (SM) biodegradable polymers (SMPs) and related composites are emerging smart materials in different applications. SMPs may adopt one (dual-shape), two (triple-shape) or several (multishape) stable temporary shapes and recover their permanent shape (or other temporary shapes in case of multi-shape versions) upon the action of an external stimulus. The external stimulus may be temperature, pH, water, light irradiation, redox condition etc. In most cases, however, the SMPs are thermally activated. The 'switching' or transformation temperature (T trans ), enabling the material to return to its permanent shape, is either linked with the glass transition (T g ) or with the melting temperature (T m ).Thus, SMPs are often subdivided based on their switch types into T g -or T m -based SMPs. As reversible 'switches' other mechanisms such as liquid crystallization and related transitions, supermolecular assembly/disassembly, irradiation-induced reversible network formation, formation and disruption of a percolation network, may also serve [1]. The permanent shape is guaranteed by physical or chemical network structures. The latter may be both on molecular and supramolecular levels. Linkages of these networks are termed net points. The temporary shape is created by mechanical deformation above T trans . In some cases the deformation temperature may be below Abstract. Shape memory polymers (SMPs) are capable of memorizing one or more temporary shapes and recovering to the permanent shape upon an external stimulus that is usually heat. Biodegradable polymers are an emerging family within the SMPs. This minireview delivers an overlook on actual concepts of molecular and supramolecular architectures which are followed to tailor the shape memory (SM) properties of biodegradable polyesters. Because the underlying switching mechanisms of SM actions is either related to the glass transition (T g ) or melting temperatures (T m ), the related SMPs are classified as T g -or T m -activated ones. For fixing of the permanent shape various physical and chemical networks serve, which were also introduced and discussed. Beside of the structure developments in one-way, also those in two-way SM polyesters were considered. Adjustment of the switching temperature to that of the human body, acceleration of the shape recovery, enhancement of the recovery stress, controlled degradation, and recycling aspects were concluded as main targets for the future development of SM systems with biodegradable polyesters.

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Section: Resultsmentioning

confidence: 99%

Biodegradable polyester-based shape memory polymers: Concepts of (supra)molecular architecturing

Karger‐Kocsis

Kéki

2014

Express Polym. Lett.

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“…Figure 2 in Zhuo et al (2011a) shows the morphology of the typical non-woven nanofibers examined by SEM, the diameters of which vary from 600 to 700 nm. With the use of a similar electrospinning setup, other researchers also get the same structure when the various polymers are electrospun into fibers Gong et al, 2012;Zhang et al, 2013b). Nonwoven fibrous structure shows an excellent pore network and can be used as filters or catalysts.…”

Section: Morphology and Structure Of Smp Nanofibersmentioning

confidence: 95%

“…Introduction of nanoparticles into polymers for electrospinning to generate well-defined properties has been demonstrated. For example, incorporation of Fe3O4 into polycaprolactone (PCL) nanofibers has been reported (Gong et al, 2012). The results indicated that the composite fibers were able to be triggered by alternating magnetic field, which was an easy method for implementing remote control.…”

Section: Morphology and Structure Of Smp Nanofibersmentioning

confidence: 99%

“…In addition, some novel shape memory fibrous composites are being fabricated by adding some functional fillers or synthesized by some special groups can realize the reversible shape changing, two-way and multiple shape memory effect, multiple stimulus actuation, etc. (Gong et al, 2012;Zhang et al, 2013b). Nanotechnology enables SMPs to be utilized in a slice of particular application fields, such as biomedical devices, textiles, nanosensors, and nanoactuators.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Shape Memory Polymer Nanofibers and Their Composites: Electrospinning, Structure, Performance, and Applications

Zhang

Zhou

et al. 2015

Front. Mater.

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Shape memory polymers (SMPs) have been defined as a kind of smart materials under great investigation from academic research to industry applications. Research on SMPs and their composites now incorporates a growing focus on nanofibers which offers new structures in microscopic level and the potential of enhanced performance of SMPs. This paper presents a comprehensive review of the development of shape memory polymer nanofibers and their composites, including the introduction of electrospinning technology, the morphology and structures of nanofibers (non-woven fibers, oriented fibers, core/shell fibers, and functional particles added in the fibers), shape memory performance (thermal and mechanical properties, stimulus responsive behavior, multiple and two-way shape changing performance), as well as their potential applications in the fields of biomedical and tissue engineering.

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“…In such materials different types of polymers including natural polymers, biopolymers and synthetic polymers, have been combined with magnetic nanoparticles (MNPs) including iron oxide (magnetite) (Fe3O4) [60,[104][105][106], maghemite (γ-Fe2O3) [107][108][109], cobalt (Co) [110], nickel (Ni) [111], iron-platinum (FePt) [112,113] NPs etc. From all the above, iron oxide NPs have been the most widely studied due to their biocompatibility, nontoxicity, and stability and are, by far, the most commonly employed MNPs in biomedical applications [114].…”

Section: Electrospun Magnetoactive Nanocomposites In Tissue Engineeringmentioning

confidence: 99%

Magnetoactive electrospun nanofibers in tissue engineering applications

Savva¹,

Krasia‐Christoforou²

2016

Nanomaterials and Regenerative Medicine

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Remotely actuated shape memory effect of electrospun composite nanofibers

Cited by 130 publications

References 60 publications

Biodegradable polyester-based shape memory polymers: Concepts of (supra)molecular architecturing

Biodegradable polyester-based shape memory polymers: Concepts of (supra)molecular architecturing

Shape Memory Polymer Nanofibers and Their Composites: Electrospinning, Structure, Performance, and Applications

Magnetoactive electrospun nanofibers in tissue engineering applications

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