Anisotropic thermally conductive flexible films based on nanofibrillated cellulose and aligned graphene nanosheets

2016 ◽  
Vol 4 (2) ◽  
pp. 305-314 ◽  
Author(s):  
Na Song ◽  
Dejin Jiao ◽  
Peng Ding ◽  
Siqi Cui ◽  
Shengfu Tang ◽  
...  
Keyword(s):  
Graphene Nanosheets ◽  
Nanofibrillated Cellulose ◽  
Hybrid Films ◽  
Graphene Nanosheet ◽  
Flexible Films ◽  
Thermally Conductive ◽  
Thermal Conductivities

The nanofibrillated cellulose/graphene nanosheet hybrid films possessed significantly anisotropic thermal conductivities. The anisotropy originated from the alignment of graphene nanosheets, which can lead to different thermal resistances along the in-plane and through-plane directions.

The preparation of poly(methylsilsesquioxane) network-polyimide hybrid materials by the sol-gel process and their properties

1994 ◽  
Vol 6 (1) ◽  
pp. 43-52 ◽  
Author(s):  
Yoshitake Iyoku ◽  
Masa-aki Kakimoto ◽  
Yoshio Imai
Keyword(s):  
Hybrid Materials ◽  
Sol Gel ◽  
Tensile Modulus ◽  
Hybrid Films ◽  
Elongation At Break ◽  
Dimethyl Acetamide ◽  
Flexible Films ◽  
Sol Gel Process ◽  
Heating Up ◽  
Silicone Content

Poly(methylsilsesquixoane) network (silicone)-polyimide hybrid materials were successfully prepared by the sol-gel reaction of methyltriethoxysilane (MTES). The ethoxysilyl group in MTES was hydrolyzed and polycondensed in the solution of the polyamic acid, derived from pyromellitic dianhydride and bis(4-aminophenyl)ether, in N,N-dimethyl-acetamide (DMAc). The hybrid films were obtained by casting the reaction mixture, followed by heating up to 300°C. The hybrid materials containing 0-60wt% of silicone afforded flexible films. The films containing less than 7 wt% silicone were yellow and transparent, whereas the films with higher silicone content were yellow and opaque. Silicone particles with a diameter of around 1-10 μm were observed in the fracture surface of the hybrid films by scanning electron microscopy. Although the tensile strength and tensile modulus of the films obtained decreased with increasing silicone content. the value of the elongation at break remained at 60% up to 30% silicone content.

Layered nanofibrillated cellulose hybrid films as flexible lateral heat spreaders: The effect of graphene defect

Carbon ◽  
2017 ◽  
Vol 115 ◽  
pp. 338-346 ◽  
Author(s):  
Na Song ◽  
Siqi Cui ◽  
Dejin Jiao ◽  
Xingshuang Hou ◽  
Peng Ding ◽  
...  
Keyword(s):  
Nanofibrillated Cellulose ◽  
Hybrid Films ◽  
Heat Spreaders ◽  
Lateral Heat

Chemiresistive gas sensor for the sensitive detection of nitrogen dioxide based on nitrogen doped graphene nanosheets

RSC Advances ◽  
2016 ◽  
Vol 6 (2) ◽  
pp. 1527-1534 ◽  
Author(s):  
Mahabul Shaik ◽  
V. K. Rao ◽  
Manish Gupta ◽  
K. S. R. C. Murthy ◽  
Rajeev Jain
Keyword(s):  
Nitrogen Dioxide ◽  
Gas Sensor ◽  
Room Temperature ◽  
Graphene Nanosheets ◽  
Sensitive Detection ◽  
Graphene Nanosheet ◽  
Interdigitated Electrodes ◽  
Nitrogen Doped ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene

Nitrogen doped graphene nanosheet coated interdigitated electrodes for sensitive detection of NO2 gas at room temperature.

scholarly journals Ball-Milled Recycled Lead-Graphite Pencils as Highly Stretchable and Low-Cost Thermal-Interface Materials

Polymers ◽  
2018 ◽  
Vol 10 (7) ◽  
pp. 799 ◽  
Author(s):  
Chun-An Liao ◽  
Yee-Kwan Kwan ◽  
Tien-Chan Chang ◽  
Yiin-Kuen Fuh
Keyword(s):  
Low Cost ◽  
Exfoliated Graphite ◽  
Thermal Interface Materials ◽  
Graphite Nanoplatelets ◽  
Thermal Interface ◽  
Thermally Conductive ◽  
Highly Stretchable ◽  
Exfoliated Graphite Nanoplatelets ◽  
Interface Materials ◽  
Thermal Conductivities

A simple and sustainable production of nanoplatelet graphite at low cost is presented using carbon-based materials, including the recycled lead-graphite pencils. In this work, exfoliated graphite nanoplatelets (EGNs), ball-milled exfoliated graphite nanoplatelets (BMEGNs) and recycled lead-graphite pencils (recycled 2B), as well as thermally cured polydimethylsiloxane (PDMS), are used to fabricate highly stretchable thermal-interface materials (TIMs) with good thermally conductive and mechanically robust properties. Several characterization techniques including scanning electron microscopy (SEM) and thermogravimetric analysis (TGA) showed that recycled nanoplatelet graphite with lateral size of tens of micrometers can be reliably produced. Experimentally, the thermal conductivity was measured for EGNs, BMEGNs and recycled 2B fillers with/without the effect of ball milling. The in-plane thermal conductivities of 12.97 W/mK (EGN), 13.53 W/mK (recycled 2B) and 14.56 W/mK (BMEGN) and through-plane thermal conductivities of 0.76 W/mK (EGN), 0.84 W/mK (recycled 2B) and 0.95 W/mK (BMEGN) were experimentally measured. Anisotropies were calculated as 15.31, 15.98 and 16.95 for EGN, recycled 2B and BMEGN, respectively. In addition, the mechanical robustness of the developed TIMs is such that they are capable of repeatedly bending at 180 degrees with outstanding flexibility, including the low-cost renewable material of recycled lead-graphite pencils. For heat dissipating application in high-power electronics, the TIMs of recycled 2B are capable of effectively reducing temperatures to approximately 6.2 °C as favorably compared with thermal grease alone.

Graphene nanosheets, carbon nanotubes, graphite, and activated carbon as anode materials for sodium-ion batteries

2015 ◽  
Vol 3 (19) ◽  
pp. 10320-10326 ◽  
Author(s):  
Xu-Feng Luo ◽  
Cheng-Hsien Yang ◽  
You-Yu Peng ◽  
Nen-Wen Pu ◽  
Ming-Der Ger ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Activated Carbon ◽  
Anode Materials ◽  
Graphene Nanosheets ◽  
Sodium Ion ◽  
High Rate ◽  
Sodium Ion Batteries ◽  
Rate Performance ◽  
Graphene Nanosheet ◽  
High Rate Performance

The graphene nanosheet electrode with excellent high-rate performance and satisfactory cyclability is an ideal anode for sodium-ion batteries.

scholarly journals Highly porous N-doped graphene nanosheets for rapid removal of heavy metals from water by capacitive deionization

2017 ◽  
Vol 53 (5) ◽  
pp. 881-884 ◽  
Author(s):  
Lianjun Liu ◽  
Xiaoru Guo ◽  
Rebecca Tallon ◽  
Xingkang Huang ◽  
Junhong Chen
Keyword(s):  
Heavy Metals ◽  
Graphene Nanosheets ◽  
Capacitive Deionization ◽  
Efficient Removal ◽  
Graphene Nanosheet ◽  
Removal Of Heavy Metals ◽  
Doped Graphene ◽  
Rapid Removal ◽  
Multiple Heavy Metals ◽  
Highly Porous

Highly porous N-doped graphene nanosheet-based capacitive deionization for rapid and efficient removal of multiple heavy metals from water.

Direct amination of Si nanoparticles for the preparation of Si@ultrathin SiOx@graphene nanosheets as high performance lithium-ion battery anodes

2015 ◽  
Vol 3 (39) ◽  
pp. 19892-19900 ◽  
Author(s):  
Jin Niu ◽  
Su Zhang ◽  
Yue Niu ◽  
Huaihe Song ◽  
Xiaohong Chen ◽  
...  
Keyword(s):  
Lithium Ion Battery ◽  
High Performance ◽  
Graphene Nanosheets ◽  
Lithium Ion ◽  
Environmentally Friendly ◽  
Silica Shell ◽  
Graphene Nanosheet ◽  
Direct Amination ◽  
Si Nanoparticles

Graphene nanosheet encapsulated Si nanoparticles with an ultrathin silica shell have been fabricated by an environmentally friendly and effective amination method.

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