Soft Actuators Based on Liquid‐Crystalline Elastomers

Yu, Yanlei; Ikeda, Tomiki

doi:10.1002/anie.200601760

Cited by 223 publications

(140 citation statements)

References 41 publications

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“…Polymers bearing azobenzene moieties (azo-polymers) are fascinating materials and have attracted considerable attention in recent years because of their unique reversible photo-isomerization and photoinduced anisotropy properties [3][4][5][6][7][8]. The photoinduced isomerization and anisotropy can cause significant bulk, surface property variation and polarity of the polymers, such as photoinduced phase transition, photoinduced surface relief gratings (SRGs) and photoinduced birefringence [9][10][11][12][13][14][15], which show potential applications in fields such as optical data storage, optical switching and nonlinear optical materials [16][17][18][19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of photoactive poly(arylene ether sulfone)s containing azobenzene moieties in their main chains

Jiang

Chen

Yue

et al. 2010

Reactive and Functional Polymers

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Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of photoactive poly(arylene ether sulfone)s containing azobenzene moieties in their main chains

Jiang

Chen

Yue

et al. 2010

Reactive and Functional Polymers

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“…Thermomechanical actuation of soft materials is generally based on a reversible thermodynamic volume change due to phase transition or thermoisomerization in the bulk solid state, [38][39][40][41][42][43] whereas the optical change of CPs is primarily caused by variations in the electronic structure. Therefore, if the PDPA matrix is infiltrated with a certain PCM, and the polymer matrix undergoes further changes in the volume and electronic structure simultaneously during the phase change of the PCM, the PCM-incorporated PDPA film can act as a unique multifunctional hybrid material that exhibits both optical and thermomechanical responses to latent heat.…”

Section: Introductionmentioning

confidence: 99%

Phase-change hybrids for thermo-responsive sensors and actuators

et al. 2014

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Highly advanced phase-change hybrids (PCHs), which consist of a phase-change material and conjugated polymer, were developed for new sensor and actuator applications. PCH films with excellent characteristics were obtained simply by depositing various molten paraffin waxes (PWs) in situ onto poly(diphenylacetylene) (PDPA) films with extremely large fractional free volumes. The phase-change enthalpy of the PWs in the hybrid films was quite high and remained constant over prolonged use. The PCH films underwent critical changes in both fluorescence (FL) intensity and color during the phase change of the PWs, which facilitated various sensor applications such as highly reversible writing/erasing, fingerprinting and array-type thermometer usage. In addition, a biaxially oriented polypropylene (BOPP)-supported PCH film exhibited extremely fast and highly reproducible thermomechanical actuation with reversible curling/uncurling during the phase change of the PWs. These findings will be useful for developing novel PCH materials with highly advanced functions and applications.

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“…They are cheap, ecologically compatible and-due to their elasticityfracture resistant, to name only a few key advantages for a potential use as actuators. In particular, liquid crystalline elastomers (LCEs) uniquely combine the elasticity of elastomers with the anisotropic self-organization of liquid crystals as a basis for mechanical actuation [6][7][8][9][10][11][12] .…”

mentioning

confidence: 99%

One-piece micropumps from liquid crystalline core-shell particles

et al. 2012

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Responsive polymers are low-cost, light weight and flexible, and thus an attractive class of materials for the integration into micromechanical and lab-on-chip systems. Triggered by external stimuli, liquid crystalline elastomers are able to perform mechanical motion and can be utilized as microactuators. Here we present the fabrication of one-piece micropumps from liquid crystalline core-shell elastomer particles via a microfluidic double-emulsion process, the continuous nature of which enables a low-cost and rapid production. The liquid crystalline elastomer shell contains a liquid core, which is reversibly pumped into and out of the particle by actuation of the liquid crystalline shell in a jellyfish-like motion. The liquid crystalline elastomer shells have the potential to be integrated into a microfluidic system as micropumps that do not require additional components, except passive channel connectors and a trigger for actuation. This renders elaborate and high-cost micromachining techniques, which are otherwise required for obtaining microstructures with pump function, unnecessary.

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Soft Actuators Based on Liquid‐Crystalline Elastomers

Cited by 223 publications

References 41 publications

Synthesis and characterization of photoactive poly(arylene ether sulfone)s containing azobenzene moieties in their main chains

Synthesis and characterization of photoactive poly(arylene ether sulfone)s containing azobenzene moieties in their main chains

Phase-change hybrids for thermo-responsive sensors and actuators

One-piece micropumps from liquid crystalline core-shell particles

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