Optical wavelength selective actuation of dye doped liquid crystalline elastomers by quasi-daylight

Zhang, Xinyu; Yao, Liru; Yan, Huixuan; Zhang, Yuhe; Han, Dongxu; He, Yifan; Li, Chensha; Zhang, Jianqi

doi:10.1039/d2sm01256a

Cited by 8 publications

(3 citation statements)

References 76 publications

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“…The fiber-shaped LCE actuators in this work were fabricated by using a two-step Michael addition and polymerization strategy 60–63 by using a soft tubular mold to shape the LCE materials. Fig.…”

Section: Resultsmentioning

confidence: 99%

Liquid crystalline elastomer self-oscillating fiber actuators fabricated from soft tubular molds

Sun,

Men,

Liu

et al. 2024

Soft Matter

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Section: Resultsmentioning

confidence: 99%

Liquid crystalline elastomer self-oscillating fiber actuators fabricated from soft tubular molds

Sun,

Men,

Liu

et al. 2024

Soft Matter

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“…Liquid crystalline elastomers (LCEs), which belong to a class of outstanding stimuli-responsive materials, are liquid crystal (LC) moieties that are incorporated in polymers with lightly crosslinked networks, in which the LC moieties with predesigned orientations are covalently bonded on the side of polymer backbones (side-chain LCEs) or are directly linked to the polymer backbones (main-chain LCEs) [ 1 , 2 , 3 , 4 , 5 , 6 ]. The synergy of the self-organization property of LC systems and the polymeric network elasticity allows the LCEs to reversibly exhibit a large and anisotropic dimensional change when external energy stimuli are applied [ 1 , 2 , 3 , 4 , 5 , 6 ], which thus makes them an appealing material in diverse application fields including soft actuators [ 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 ], soft robotics [ 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 ], artificial muscles [ 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 ], biomedical devices [ 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 ,…”

Section: Introductionmentioning

confidence: 99%

Programmable Complex Shape Changing of Polysiloxane Main-Chain Liquid Crystalline Elastomers

et al. 2023

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Liquid crystal elastomers (LCEs) are shape-morphing materials whose large and reversible shape transformations are caused by the coupling between the mobile anisotropic properties of liquid crystal (LC) units and the rubber elastic of polymer networks. Their shape-changing behaviors under certain stimuli are largely directed by the LC orientation; therefore, various strategies have been developed to spatially modulate the LC alignments. However, most of these methods are limited as they require complex fabrication technologies or have intrinsic limitations in applicability. To address this issue, programmable complex shape changes in some LCE types, such as polysiloxane side-chain LCEs, thiol-acrylate main-chain LCEs, etc., were achieved by using a mechanical alignment programming process coupled with two-step crosslinking. Here, we report a polysiloxane main-chain LCE with programmable 2- and 3D shape-changing abilities that were created by mechanically programming the polydomain LCE with two crosslinking steps. The resulting LCEs exhibited a reversible thermal-induced shape transformation between the initial and programmed shapes due to the two-way memory between the first and second network structures. Our findings expand on the applications of LCE materials in actuators, soft robotics, and smart structures where arbitrary and easily programmed shape morphing is needed.

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“…Liquid crystalline elastomers (LCEs), which belong to a class of outstanding stimuliresponsive materials, are liquid crystal (LC) moieties that are incorporated in polymers with lightly crosslinked networks, in which the LC moieties with predesigned orientations are covalently bonded on the side of polymer backbones (side-chain LCEs) or are directly linked to the polymer backbones (main-chain LCEs) [1][2][3][4][5][6]. The synergy of the self-organization property of LC systems and the polymeric network elasticity allows the LCEs to reversibly exhibit a large and anisotropic dimensional change when external energy stimuli are applied [1][2][3][4][5][6], which thus makes them an appealing material in diverse application fields including soft actuators [7][8][9][10][11][12][13][14][15][16], soft robotics [17][18][19][20][21][22][23][24], artificial muscles [25][26][27][28][29][30][31][32], biomedical devices [33][34][35][36][37][...…”

Section: Introductionmentioning

confidence: 99%

Programmable Complex Shape Changing of Polysiloxane Main-Chain Liquid-Crystalline Elastomers

Zhang¹,

Wang²,

Yang³

et al. 2023

Preprint

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Liquid crystal elastomers (LCEs) are shape morphing materials whose large and reversible shape transformation results from the coupling between the mobile anisotropic properties of liquid crystal (LC) units and the rubber elastic of polymer networks. Their shape changing behaviors under the stimuli are largely directed by LC orientations, and therefore various strategies have been developed to spatially modulate the LC alignments. But most of the methods suffer from complex fabrication technologies or intrinsic limitations in applicability. To address this issue, programmable complex shape changes in some types of LCEs, such as polysiloxane side-chain LCEs or thiol-acrylate main-chain LCEs, etc, have been achieved by using a mechanical alignment programming process coupled with two-step crosslinking. Here, we report a polysiloxane main-chain LCE with programmable 2D and 3D shape changing performances achieved by mechanically programming the polydomain LCE between the two crosslinking steps. The resulting LCEs exhibited reversible thermal induced shape transformation between the initial and programmed shapes due to the two-way memory between the first network structure and the second network structure. Our work would be potential for expanding the applications of LCE materials in actuators, soft robotics and smart structures where arbitrary and easily programmed shape morphings are needed.

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Optical wavelength selective actuation of dye doped liquid crystalline elastomers by quasi-daylight

Abstract: We developed an optical selective actuation of dye doped liquid crystalline elastomers based on difference in absorption band of dyes. Selective actuation could be demonstrated by filtering the same quasi-daylight to be different wavelength bands.

Cited by 8 publications

References 76 publications

Liquid crystalline elastomer self-oscillating fiber actuators fabricated from soft tubular molds

Liquid crystalline elastomer self-oscillating fiber actuators fabricated from soft tubular molds

Programmable Complex Shape Changing of Polysiloxane Main-Chain Liquid Crystalline Elastomers

Programmable Complex Shape Changing of Polysiloxane Main-Chain Liquid-Crystalline Elastomers

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