3D-Printed Graphene/Polydimethylsiloxane Composites for Stretchable and Strain-Insensitive Temperature Sensors

Wang, Zhenyu; Gao, Wengen; Zhang, Qiang; Zheng, Kaiqing; Xu, Jingyi; Xü, Wei; Shang, Erwei; Jiang, Jing; Zhang, Jie; Liu, Yu

doi:10.1021/acsami.8b16139

Cited by 167 publications

(125 citation statements)

References 57 publications

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“…Regardless of the self-healing method, the temperature of the self-healing is a very important factor. The self-healing conductive composite film still exhibits a good conductivity.Nanomaterials 2020, 10, 753 2 of 16 of the material can be automatically healed to improve the safety, lifetime, and environmental impact of man-made materials [16][17][18][19][20][21]. To obtain self-healing materials, many strategies have been explored, such as micro-containers containing healing agent and microvascular networks in the matrix, dynamic chemical bonds or weak interaction [22][23][24][25][26][27].…”

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confidence: 99%

Electrical and Thermal and Self-Healing Properties of Graphene-Thermopolyurethane Flexible Conductive Films

et al. 2020

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We fabricated graphene-thermopolyurethane (G-TPU) flexible conductive film by a blending method and systematically investigated the electrical, thermal and self-healing properties of the G-TPU flexible conductive film by infrared light and electricity. The experimental results demonstrate that the G-TPU composite films have good conductivity and thermal conductivity in the appropriate mass content of graphene in the composite film. The composite films have the good electro-thermal and infrared light thermal response performances and electro-thermal response performance is closely related to the mass content of graphene in the composite film, but the infrared light thermal response performance is not. The scratch on the composite film can be completely healed, using electricity or infrared light. The healing efficiency of the composite film healed using infrared light is higher than that of using the electricity, while the healing time of the composite film is shorter. Regardless of the self-healing method, the temperature of the self-healing is a very important factor. The self-healing conductive composite film still exhibits a good conductivity.Nanomaterials 2020, 10, 753 2 of 16 of the material can be automatically healed to improve the safety, lifetime, and environmental impact of man-made materials [16][17][18][19][20][21]. To obtain self-healing materials, many strategies have been explored, such as micro-containers containing healing agent and microvascular networks in the matrix, dynamic chemical bonds or weak interaction [22][23][24][25][26][27]. These self-healing materials can realize self-healing by using a large number of healing agents [28,29]. In theory, they can realize multiple self-healing of the damaged materials with the assistance of external light, heat, and electric field, et al. Although, great progress has been made in the research of the self-healing materials and techniques, there are still some critical problems that restrict their applications, such as low mechanical properties after healing, high cost, time-consuming, and low efficiency. Therefore, it is significant to fabricate a self-healing polymer and composites based on new materials, and then explore their potential applications, as well as new healing method.Graphene (G), a novel two-dimensional material, possesses large specific surface area, superior mechanical property, as well as being an excellent conductor of both heat and electricity, and having a good microwave and infrared absorbing capacity, so they have strong response to electricity and electromagnetic waves and infrared radiation (IR) [30][31][32][33][34]. Graphene is often used as fillers in preparing functional composites. Based on these properties, researchers fabricated graphene-based self-healing polymer composites by introducing graphene into the polymer [34,35]. Kim et al. reported, for the first time, self-healable PU nanocomposites, containing modified graphene by the near IR absorption of graphene [36]. Huang et al. prepared TPU containing few layers of g...

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confidence: 99%

Electrical and Thermal and Self-Healing Properties of Graphene-Thermopolyurethane Flexible Conductive Films

et al. 2020

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“…Polydimethylsiloxane (PDMS) has been broadly used for prototyping devices, [ 1–3 ] stretchable electronics, [ 4–6 ] microfluidics, [ 7–9 ] and medical devices, [ 10 ] with the excellent biocompatibility, flexibility, transparent, and gas permeability. [ 11,12 ] Recently, three‐dimensional (3D) printing of PDMS is attracting extensive attention due to the capability of achieving structures with high complexity by combining 3D printing's merits of freeform design and fabrication and rapid prototyping.…”

Section: Methodsmentioning

confidence: 99%

Facile Photo and Thermal Two‐Stage Curing for High‐Performance 3D Printing of Poly(Dimethylsiloxane)

Jiang

Zhang

et al. 2020

Macromol. Rapid Commun.

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moderate elastic modulus) for extrusion with the techniques of inkjet printing and direct ink writing (DIW). Unfortunately, most of the common PDMS precursors have neither light responsive (no unsaturated bonds or groups for curing or cross-linking) nor moderate viscosity (too low viscosity to support the deposited filaments). Recent advances have been exploited to solve these issues to achieve PDMS 3D printing. For example, Feinberg et al. demonstrated the 3D printing hydrophobic Sylgard-184 prepolymer resins within a hydrophilic Carbopol gel support via freeform reversible embedding. [19] Bhattacharjee and co-workers realized desktop-stereolithography 3D printing of PDMS based on commercially available methacrylated PDMS. [20] Very recently, Qin et al. developed a methacrylated PDMS that can realize the ultrafast and continuous fabrication of the PDMS membrane by UV induced polymerization. [21] Despite of the 3D objects obtained in the previous efforts, there are still some blemishes including the difficulty to build complicated 3D architectures and the requirement of fussy procedures for manually removing supporting bath. [22] Also, most of them are not compatible to the commercially available PDMSs, and moreover these tailor-made PDMSs for 3D printing usually exhibited quite poor mechanical performances with the tensile strength of less than ≈0.7 MPa, which is one order decrease, [6,20] and the elastic modulus of less than 0.9 MPa. [19] Therefore, there are still challenges to achieve 3D printing of PDMS and devices, especially with a universal approach and based on commercial materials.To address, we propose a photo/thermal two-stage curing strategy under the premise of excellent rheological behaviors, i.e., 3D printing with ultraviolet-assisted direct ink writing (UV-DIW) followed by thermal cross-linking, based on a commercial material of Sylgard-184. Typically, a commercial methacrylated prepolymer ((Methacryloxypropyl)methylsiloxane-dimethylsiloxane copolymer, M-PDMS, Scheme 1) was mixed with the base and curing agent of Sylgard-184 resulting in a photosensitive PDMS (pPDMS). Due to the UV curing capability, the pPDMS exhibits excellent 3D printability because of the adjustment of the viscosity and elastic modulus during the extruded process with the UV-DIW technology. [23,24] The filament diameter of ≈100 µm and the layer thickness of ≈80 µm can be achieved, and also architectures with high complexity including hollow cylinders, lattices, cellular structures, and Three-dimensional (3D) printing of poly(dimethylsiloxane) (PDMS) is realized with a two-state curing strategy, i.e., photocuring for additively manufacturing high-precision architectures followed by thermal cross-linking for high-performance objects, taking Sylgard-184 as an example. In the mixture of base and curing agent of Sylgard-184, the photocuring ingredient methacrylated PDMS is incorporated to form hybrid inks with not only highefficiency UV curing ability but also moderate rheological properties for 3D printing. The inks are then used...

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“…Therefore, ink rheology has to allow flow inside the printing device, while preserving the geometry on the substrate. Graphene/PDMS composites were 3D printed to fabricate stretchable temperature sensors with low interference from strain on the resistance change . To be 3D printable, a nonflowable graphene/PDMS nanoplatelet ink was formulated and used in a 3D direct ink writing printer.…”

Section: Other Fabrication Techniquesmentioning

confidence: 99%

“…With this setup, a temperature sensor was fabricated by printing a grid structure of the composite ink directly on a silicon wafer. The temperature sensor was used to measure skin temperature on curved surfaces . This shows novel technologies such as 3D printing being used for the fabrication of flexible and stretchable temperature sensors, which have applications in monitoring skin temperature.…”

Section: Other Fabrication Techniquesmentioning

confidence: 99%

Fabrication and Patterning Methods of Flexible Sensors Using Carbon Nanomaterials on Polymers

Costa

Choi

2020

Advanced Intelligent Systems

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Flexible sensors composed of carbon nanostructures and elastic materials have been developed for healthcare monitoring, environmental monitoring, disposable biochemical or electrochemical sensors, and many other applications. Fabrication approaches for such sensors and their advantages and current issues related to patterning high-performance flexible sensors are reviewed. A focus is placed on patterning techniques for carbon-based flexible sensors including carbon nanotubes, graphene, and other carbon nanostructures. First, novel patterning techniques for nanomaterials are described, along with their current challenges. Next, emerging flexible sensors including humidity, temperature, strain, and pressure sensors are discussed. Finally, the challenges and perspectives for flexible sensors are addressed. REVIEW www.advintellsyst.com

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3D-Printed Graphene/Polydimethylsiloxane Composites for Stretchable and Strain-Insensitive Temperature Sensors

Cited by 167 publications

References 57 publications

Electrical and Thermal and Self-Healing Properties of Graphene-Thermopolyurethane Flexible Conductive Films

Electrical and Thermal and Self-Healing Properties of Graphene-Thermopolyurethane Flexible Conductive Films

Facile Photo and Thermal Two‐Stage Curing for High‐Performance 3D Printing of Poly(Dimethylsiloxane)

Fabrication and Patterning Methods of Flexible Sensors Using Carbon Nanomaterials on Polymers

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