scholarly journals Thin Electric Heating Membrane Constructed with a Three-Dimensional Nanofibrillated Cellulose–Graphene–Graphene Oxide System

Materials ◽  
2018 ◽  
Vol 11 (9) ◽  
pp. 1727 ◽  
Author(s):  
Chuang Shao ◽  
Zhenyu Zhu ◽  
Chuwang Su ◽  
Sheng Yang ◽  
Quanping Yuan
Keyword(s):  
Graphene Oxide ◽  
Power Density ◽  
Heat Dissipation ◽  
Three Dimensional ◽  
Electric Heating ◽  
Nanofibrillated Cellulose ◽  
Oxide System ◽  
Homogeneous Distribution ◽  
Graphene Sheets ◽  
Laminated Structure

Nanofibrillated cellulose (NFC) and graphene oxide (GO) with reinforcing and film-forming properties were employed with graphene to develop a novel and thin electric heating membrane with heat dissipation controllability. A negative charge was found on the surface of GO and NFC in aqueous dispersions, which contributed to the homogeneous distribution of the graphene sheets. The membrane had a good laminated structure with three-dimensional interaction between GO and NFC, with embedded graphene sheets. Conductivity was characterized as a function of the amount of graphene, thus giving control over to the heating power by adjusting the ratio of graphene. Subsequent electric heating tests can remove irregularities on the GO and graphene sheet, improving the laminated structure further. The temperature on the surface of the membrane presented an exponential increasing regularity with time. Under the same power density and time, the stabilized temperature rise of membranes was higher when grammage was higher, which was characterized by the linear function of the power density. Low-grammage membranes (1 and 4 g·m−2) also exhibited regular and even stabilized temperature rises. The indicated structure and heating performance of the membrane, as well as the variation induced by Joule heating, would drive its applications.

scholarly journals High-power biofuel cells based on three-dimensional reduced graphene oxide/carbon nanotube micro-arrays

2019 ◽  
Vol 5 (1) ◽  
Author(s):  
Yin Song ◽  
Chunlei Wang
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Power Density ◽  
Three Dimensional ◽  
Biofuel Cells ◽  
Maximum Power ◽  
Cell Performance ◽  
Theoretical Modelling ◽  
Maximum Power Density ◽  
Reduced Graphene

Abstract Miniaturized enzymatic biofuel cells (EBFCs) with high cell performance are promising candidates for powering next-generation implantable medical devices. Here, we report a closed-loop theoretical and experimental study on a micro EBFC system based on three-dimensional (3D) carbon micropillar arrays coated with reduced graphene oxide (rGO), carbon nanotubes (CNTs), and a biocatalyst composite. The fabrication process of this system combines the top–down carbon microelectromechanical systems (C-MEMS) technique to fabricate the 3D micropillar array platform and bottom–up electrophoretic deposition (EPD) to deposit the reduced rGO/CNTs/enzyme onto the electrode surface. The Michaelis–Menten constant KM of 2.1 mM for glucose oxidase (GOx) on the rGO/CNTs/GOx bioanode was obtained, which is close to the KM for free GOx. Theoretical modelling of the rGO/CNT-based EBFC system via finite element analysis was conducted to predict the cell performance and efficiency. The experimental results from the developed rGO/CNT-based EBFC showed a maximum power density of 196.04 µW cm−2 at 0.61 V, which is approximately twice the maximum power density obtained from the rGO-based EBFC. The experimental power density is noted to be 71.1% of the theoretical value.

Three-Dimensional Printable Gelatin Hydrogels Incorporating Graphene Oxide to Enable Spontaneous Myogenic Differentiation

2021 ◽  
Vol 10 (4) ◽  
pp. 426-432
Author(s):  
Moon Sung Kang ◽  
Jeon Il Kang ◽  
Phuong Le Thi ◽  
Kyung Min Park ◽  
Suck Won Hong ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Myogenic Differentiation ◽  
Three Dimensional

Heat dissipation optimization and prediction for three-dimensional fan-out package

2021 ◽  
Vol 166 ◽  
pp. 106983
Author(s):  
Jinfeng Huang ◽  
Zhenzhi He ◽  
Chunxiao Li ◽  
Libo Zhao ◽  
Xiangning Lu
Keyword(s):  
Heat Dissipation ◽  
Three Dimensional

Three-dimensional N/S Co-doped holey graphene oxide based hydrogel electrodes for high performance supercapacitors

2021 ◽  
Vol 39 ◽  
pp. 102658
Author(s):  
Zhenxiang Zhu ◽  
Zhenxing Wang ◽  
Zhaohu Ba ◽  
Jie Dong ◽  
Qinghua Zhang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
High Performance ◽  
Three Dimensional ◽  
Co Doped

scholarly journals Direct Patterning and Spontaneous Self-Assembly of Graphene Oxide via Electrohydrodynamic Jet Printing for Energy Storage and Sensing

Micromachines ◽  
2019 ◽  
Vol 11 (1) ◽  
pp. 13 ◽  
Author(s):  
Bin Zhang ◽  
Jaehyun Lee ◽  
Mincheol Kim ◽  
Naeeung Lee ◽  
Hyungdong Lee ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Energy Storage ◽  
Self Assembly ◽  
High Performance ◽  
Three Dimensional ◽  
Chemical Properties ◽  
Layer By Layer ◽  
Energy Storage Devices ◽  
Laminar Structure ◽  
Jet Printing

The macroscopic assembly of two-dimensional materials into a laminar structure has received considerable attention because it improves both the mechanical and chemical properties of the original materials. However, conventional manufacturing methods have certain limitations in that they require a high temperature process, use toxic solvents, and are considerably time consuming. Here, we present a new system for the self-assembly of layer-by-layer (LBL) graphene oxide (GO) via an electrohydrodynamic (EHD) jet printing technique. During printing, the orientation of GO flakes can be controlled by the velocity distribution of liquid jet and electric field-induced alignment spontaneously. Closely-packed GO patterns with an ordered laminar structure can be rapidly realized using an interfacial assembly process on the substrates. The surface roughness and electrical conductivity of the LBL structure were significantly improved compared with conventional dispensing methods. We further applied this technique to fabricate a reduced graphene oxide (r-GO)-based supercapacitor and a three-dimensional (3D) metallic grid hybrid ammonia sensor. We present the EHD-assisted assembly of laminar r-GO structures as a new platform for preparing high-performance energy storage devices and sensors.

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