Light-actuated reversible shape memory effect of a polymer composite

Li, Wenbing; Liu, Yanju; Leng, Jinsong

doi:10.1016/j.compositesa.2018.04.019

Cited by 51 publications

(20 citation statements)

References 41 publications

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“…It has been used to create an actuator which can autonomously move when placed on a surface of constant temperature [ 197 ] and has been doped with p‐aminodiphenylimide as a light absorber for photothermal actuation. [ 198 ]…”

Section: Other Smart Polymersmentioning

confidence: 99%

Smart Polymers for Microscale Machines

Tan

Davis

Cappelleri

2020

Adv Funct Materials

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Microscale machines are able to perform a number of tasks like micromanipulation, drug‐delivery, and noninvasive surgery. In particular, microscale polymer machines that can perform intelligent work for manipulation or transport, adaptive locomotion, or sensing are in‐demand. To achieve this goal, shape‐morphing smart polymers like hydrogels, liquid crystalline polymers, and other smart polymers are of great interest. Structures fabricated by these materials undergo mechanical motion under stimulation such as temperature, pH, light, and so on. The use of these materials renders microscale machines that undergo complex stimuli‐responsive transformation such as from planar to 3D by combining spatial design like introducing in‐plane or out‐plane differences. During the past decade, many techniques have been developed or adopted for fabricating structures with smart polymers including microfabrication methods and the well‐known milestone of 4D printing, starting in 2013. In this review, the existing or potential active smart polymers that could be used to fabricate active microscale machines to accomplish complex tasks are summarized.

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Section: Other Smart Polymersmentioning

confidence: 99%

Smart Polymers for Microscale Machines

Tan

Davis

Cappelleri

2020

Adv Funct Materials

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“…Much like reversible SMPs fabricated by conventional methods (Cui et al, 2020;Du et al, 2019;Li, Liu, & Leng, 2018), the as-built devices made of hydrogels are mostly 2.5D at best (a vertical projection from 2D) instead of 3D, which limits the structure complexity and functionality. Only upon stimulation could the device be converted to a simple 3D structure.…”

Section: Introductionmentioning

confidence: 99%

Contactless reversible 4D-printing for 3D-to-3D shape morphing

Lee

Zhou

et al. 2020

Virtual and Physical Prototyping

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4D printing provides a means to create dynamic structures for self-actuating devices fabricated by additive manufacturing techniques. Most existing 4D printing processes are only capable of one-way shape morphing using a single mechanism for stimulation. In the limited successful reversible 4D-printing studies, most only demonstrate 2D-to-3D shape morphing. This study introduces a contactless shape setting mechanism to empower reversible 4D printing using a combination of stimuli. The forward shape programming is realized by asymmetric swelling with heated ethanol, and the shape recovery is accomplished by dry heating. The shape morphing can be predicted using a simulation model. Several designs are 4D-printed to achieve different forms of morphing to obtain 3D-to-3D shape morphing. The entire shape morphing cycle could be completed within as short as 3 minutes. The capability of 3D-to-3D shape morphing and reversibility of our 4D-printing process promise great potential for different applications such as biomimetics and soft robotics.

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“…Shape memory polymers (SMPs) possess the function to change their shape from a provisional shape to the original shape when exposed to external stimulation, have found extensive applications in diverse ranges, such as textiles, 1 sensors, 2 biomedical materials 3 due to their smart and outstanding shape recoverability. SMPs can retain a temporary shape under a certain condition and readapt the distinct previous shape in response to external stimulation, such as pH 4 , electricity, 5 light, 6 heat, 7 magnetic field, 8 and so on. In recent years, SMHs, containing a large amount of water, have attracted much more attention because of their attractive application prospects in biomedical materials 9 and sensors 10–12 .…”

Section: Introductionmentioning

confidence: 99%

Dual‐responsive shape memory hydrogels with self‐healing and dual‐responsive swelling behaviors

Yang¹,

Gao²,

Zhao

et al. 2020

J of Applied Polymer Sci

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Shape memory hydrogels (SMHs) can fix the hydrogels in a provisional shape and restore the initial shape under external stimulation. Herein, a dualresponsive shape memory hydrogel with dual-responsive swelling and selfhealing properties is presented in this work. The SMHs were fabricated by one-step emulsion copolymerization of acrylic acid (AAc), acrylamide (AAm) and stearyl methacrylate (SMA). Sodium alginate (SA) was introduced as an interpenetrating polymer in the network. With ionic cross-linking between-COO − and Fe 3+ or saline-reinforced hydrophobic association, the hydrogels

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Light-actuated reversible shape memory effect of a polymer composite

Cited by 51 publications

References 41 publications

Smart Polymers for Microscale Machines

Smart Polymers for Microscale Machines

Contactless reversible 4D-printing for 3D-to-3D shape morphing

Dual‐responsive shape memory hydrogels with self‐healing and dual‐responsive swelling behaviors

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