4D printed electro-induced continuous carbon fiber reinforced shape memory polymer composites with excellent bending resistance

Zeng, Chengjun; Liu, Liwu; Bian, Wenfeng; Liu, Yanju; Leng, Jinsong

doi:10.1016/j.compositesb.2020.108034

Cited by 102 publications

(51 citation statements)

References 43 publications

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“…Shape‐memory polymers (SMPs) have been at the forefront of recent smart implant material research 3–4 . They are stimuli‐responsive materials that can restore their original shape under the application of external stimuli (heat, 5 light, 6 electricity, 7 magnetism, 8 solvent, 9 and pH 10 ) after undergoing shape deformation. Indeed, SMPs have been known for quite a long time and are the basis of numerous innovative technology research.…”

Section: Introductionmentioning

confidence: 99%

Printability, shape‐memory, and mechanical properties of PHB/PCL/CNFs composites

Yue

Hua

et al. 2021

J of Applied Polymer Sci

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Shape‐memory polymers have attracted attention as smart implant materials in recent years because they are lightweight, low‐cost, easily processable, and because they undergo large deformation. Here, cellulose nanofibers (CNFs) were used as a reinforcement for polyhydroxybutyrate (PHB)/polycaprolactone (PCL) composites to improve mechanical properties. The composites were investigated by rheological tests, differential scanning calorimetry, dynamic mechanical analysis, mechanical property tests, and shape‐memory tests. The printability of PHB/PCL/CNFs composites was demonstrated by using them to print interconnected porous structures with a gyroid surface. The results showed that the PHB/PCL (80:20) composites with 1 wt% CNF displayed the best comprehensive mechanical and shape‐memory properties. As a functional verification, a model of the self‐opening hand was fabricated by 3D printing, and its deformation and recovery capabilities were evaluated.

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Section: Introductionmentioning

confidence: 99%

Printability, shape‐memory, and mechanical properties of PHB/PCL/CNFs composites

Yue

Hua

et al. 2021

J of Applied Polymer Sci

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“…57 Another composite was prepared by Zeng et al who added continuous carbon fibers to a PLA filament during 3D printing. 58 Using a modified FDM printer, they fed a special PLA with good shape memory properties 59,60 and continuous carbon filaments simultaneously through a single nozzle. In this way, different nozzle temperatures, printing speeds and infill angles were investigated in terms of their influence on the mechanical sample properties.…”

Section: Pla Compositesmentioning

confidence: 99%

“…The conductive carbon filaments allowed for electrical actuation by resistive heating, leading to recovery above 95% in approx. 75 s. 58 Carbon nanotubes (CNTs) were introduced in PLA instead by Liu et al 61 They found a dependency of the volume resistivity on the raster angle as well as the temperature, especially above approx. 70 C. Resistive heating thus resulted in different time-dependencies of the temperatures reached in the samples.…”

Section: Pla Compositesmentioning

confidence: 99%

3D printing of shape memory polymers

Ehrmann¹,

Ehrmann

2021

J of Applied Polymer Sci

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Shape memory polymers (SMPs) are polymers which ''remember'' their original shape and can return to it after deformation, if an external stimulus-often an increased temperatureis applied. Some SMPs can be 3D printed, typically by fused deposition modeling (FDM). The most well-known SMP is poly(lactic acid), which belongs to the most often used materials in FDM 3D printing. There are; however, many more SMPs which can be 3D printed to combine the possibilities to prepare new, sophisticated shapes with the opportunity to restore these shapes after undesirable or intentional deformation. This review gives an overview of several 3D printable SMPs, their mechanical characteristics and their possible applications.

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“…Following a similar approach, Zeng et al used a dual nozzle 3D printer to print composite parts based on PLA reinforced with continuous carbon fiber [ 76 ]. The mechanical performance of the printed parts was evaluated through three-point bending tests and correlated with the printing parameters.…”

Section: Non-conventional Technologies and Most Common Polymers To Produce Eapsmentioning

confidence: 99%

Electroactive Polymers Obtained by Conventional and Non-Conventional Technologies

2021

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Electroactive polymers (EAPs), materials that present size/shape alteration in response to an electrical stimulus, are currently being explored regarding advanced smart devices, namely robotics, valves, soft actuators, artificial muscles, and electromechanical sensors. They are generally prepared through conventional techniques (e.g., solvent casting and free-radical polymerization). However, non-conventional processes such as those included in additive manufacturing (AM) are emerging as a novel approach to tune and enhance the electromechanical properties of EAPs to expand the scope of areas for this class of electro-responsive material. This review aims to summarize the published work (from the last five years) in developing EAPs either by conventional or non-conventional polymer processing approaches. The technology behind each processing technique is discussed as well as the main mechanism behind the electromechanical response. The most common polymer-based materials used in the design of current EAPs are reviewed. Therefore, the main conclusions and future trends regarding EAPs obtained by conventional and non-conventional technologies are also given.

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4D printed electro-induced continuous carbon fiber reinforced shape memory polymer composites with excellent bending resistance

Cited by 102 publications

References 43 publications

Printability, shape‐memory, and mechanical properties of PHB/PCL/CNFs composites

Printability, shape‐memory, and mechanical properties of PHB/PCL/CNFs composites

3D printing of shape memory polymers

Electroactive Polymers Obtained by Conventional and Non-Conventional Technologies

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