Selective laser sintering 3D-Printed conductive thermoplastic polyether-block-amide elastomer/carbon nanotube composites for strain sensing system and electro-induced shape memory

Ding, Bowen; Zhang, Yuancheng; Wang, Jiqiang; Mei, Shuxiang; Chen, Xiaoyin; Liu, Siyuan; Zhao, Wei; Zhang, Xiaomeng; Shi, Ge; He, Yanjie; Cui, Zhe; Fu, Peng; Pang, Xinchang

doi:10.1016/j.coco.2022.101280

Cited by 22 publications

(6 citation statements)

References 34 publications

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“…With increased content of MWCNT, it gradually has the ability to form a conductive network. According to Ding et al, 35 the electrical conductivity of thermoplastic polyether-block-amide elastomer nanocomposites increases with the increase of MWCNT loading, which is attributed to the highly interconnected MWCNT conductive network. Based on the TEM images (see Figure 1(c) and (d)), it is clear that when the MWCNT loading is at 3 wt%, the dispersion of the MWCNT is considerably good, while the conductive path is built-up from multiple directions.…”

Section: Resultsmentioning

confidence: 95%

Electrical conductivity and tensile properties of carbon nanotube reinforced styrene-ethylene-butylene-styrene thermoplastic elastomer nanocomposites

Zhu

Chow

Rusli

2022

Journal of Thermoplastic Composite Materials

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In this study, nanocomposites based on styrene-ethylene-butylene-styrene (SEBS) thermoplastic elastomer (TPE) filled with multiwall carbon nanotubes (MWCNT) were produced using twin-screw extrusion. Two types of pre-mixing methods were applied to assess the dispersion-ability of the MWCNT. In Method A, the SEBS, MWCNT, and paraffinic process oil were mixed together in one step and fed simultaneously into the hopper for melt extrusion. In Method B, the MWCNT were first mixed with paraffinic process oil before being added to SEBS. The dispersion of MWCNT in SEBS TPE was characterized by transmission electron microscopy. The effects of the MWCNT on the electrical resistivity and tensile properties of the SEBS TPE were determined. A balance of tensile properties and electrical properties can be achieved by adding 3 wt% MWCNT into SEBS TPE, especially using Method B. Pre-mixing of MWCNT with paraffinic process oil promotes better dispersibility, higher electrical conductivity, and better tensile properties.

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Section: Resultsmentioning

confidence: 95%

Electrical conductivity and tensile properties of carbon nanotube reinforced styrene-ethylene-butylene-styrene thermoplastic elastomer nanocomposites

Zhu

Chow

Rusli

2022

Journal of Thermoplastic Composite Materials

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“…As shown in Figure 8, Ding et al utilized the selective laser sintering (SLS) technique to fabricate flexible nanocomposites composed of thermoplastic polyether block amide (TPAE) and multi-walled carbon nanotubes (MWCNTs). These flexible TPAE/MWCNTs nanocomposites exhibited excellent performance in strain sensing, electrically induced shape memory effect, and electrical conductivity [71].…”

Section: Slsmentioning

confidence: 99%

Nano-Additive Manufacturing and Non-Destructive Testing of Nanocomposites

She,

Tang,

Wang

et al. 2023

Nanomaterials

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In the present work, the recent advancements in additive manufacturing (AM) techniques for fabricating nanocomposite parts with complex shaped structures are explained, along with defect non-destructive testing (NDT) methods. A brief overview of the AM processes for nanocomposites is presented, grouped by the type of feedstock used in each technology. This work also reviews the defects in nanocomposites that can affect the quality of the final product. Additionally, a detailed description of X-CT, ultrasonic phased array technology, and infrared thermography is provided, highlighting their potential application in non-destructive inspection of nanocomposites in the future. Lastly, it concludes by offering recommendations for the development of NDT methods specifically tailored for nanocomposites, emphasizing the need to utilize NDT methods for optimizing nano-additive manufacturing process parameters, developing new NDT techniques, and enhancing the resolution of existing NDT methods.

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“…Furthermore, 0.2 wt.% nano-SiO 2 was added to improve the flowability of the original TPAE powder, which can be proved by previous studies in the laboratory. [54] The powder after freezing and pulverization was sieved through a sieving machine, and the T0.6-2 powder with a particle size of 0-200 μm (the powder yield was ≈74%) was used for printing.…”

Section: Preparation Of Tpae Powdermentioning

confidence: 99%

“…The parameters of SLS printing for TPAE had been explored by our laboratory. [54] And the optimized SLS-printing parameters including the fill laser power, fill distance, roller speed, and layer thickness for T0.6-2 powder were set as 20 W, 0.15 mm, 2.28 m s −1 , and 0.10 mm, respectively. Since the feed temperature was generally 20-30 °C lower than the part temperature which was very critical to be selected, the caking test of T0.6-2 powder was performed (Figure 8).…”

Section: D Printed Shape Memory Tpaementioning

confidence: 99%

4D Printed Thermoplastic Polyamide Elastomers with Reversible Two‐Way Shape Memory Effect

Liu

Mei

et al. 2023

Adv Materials Technologies

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4D printing has become a research hotspot in recent years. Only a few elastomer materials can be printed by selective laser sintering (SLS) and achieve a reversible two-way shape memory effect (2W-SME) at the same time, which greatly limits the applications of 4D printing. Therefore, it's still a challenge to develop a new elastomer possessing reversible 2W-SME. In this work, a series of thermoplastic polyamide elastomers (TPAEs) are synthesized successfully through the polycondensation reaction of PA1212 prepolymer and polyetheramine, which exhibited excellent thermal stability, flexibility, and resilience. The crystalline PA1212 hard domains acted as a skeleton to maintain the permanent shapes, and the polyether soft segments acted as actuation phase to realize crystallization-induced elongation (CIE) and melting-induced contraction (MIC) under internal stress. The reversible 2W-SME of T0.6-2 films is first realized, and the reversible response strain can reach 15.2% and a good shape recovery ratio is also achieved. After freeze-crushing and sieving, SLS-printable TPAE powder is obtained, and the SLS-processed samples also exhibited excellent reversible 2W-SME to realize 4D printing. This new TPAE material not only broadens 4D printable materials, but also has a potential in the fields of soft robots, temperature sensors, and even aerospace equipment.

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Selective laser sintering 3D-Printed conductive thermoplastic polyether-block-amide elastomer/carbon nanotube composites for strain sensing system and electro-induced shape memory

Cited by 22 publications

References 34 publications

Electrical conductivity and tensile properties of carbon nanotube reinforced styrene-ethylene-butylene-styrene thermoplastic elastomer nanocomposites

Electrical conductivity and tensile properties of carbon nanotube reinforced styrene-ethylene-butylene-styrene thermoplastic elastomer nanocomposites

Nano-Additive Manufacturing and Non-Destructive Testing of Nanocomposites

4D Printed Thermoplastic Polyamide Elastomers with Reversible Two‐Way Shape Memory Effect

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