In situ synthesis of the reduced graphene oxide–polyethyleneimine composite and its gas barrier properties

2013 ◽  
Vol 1 (11) ◽  
pp. 3739 ◽  
Author(s):  
Hongyu Liu ◽  
Tapas Kuila ◽  
Nam Hoon Kim ◽  
Bon-Cheol Ku ◽  
Joong Hee Lee
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Barrier Properties ◽  
In Situ Synthesis ◽  
Gas Barrier ◽  
Reduced Graphene ◽  
Gas Barrier Properties

Tailoring Assembly of Reduced Graphene Oxide Nanosheets to Control Gas Barrier Properties of Natural Rubber Nanocomposites

2014 ◽  
Vol 6 (4) ◽  
pp. 2230-2234 ◽  
Author(s):  
Giuseppe Scherillo ◽  
Marino Lavorgna ◽  
Giovanna G. Buonocore ◽  
Yanhu H. Zhan ◽  
Hesheng S. Xia ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Natural Rubber ◽  
Reduced Graphene Oxide ◽  
Barrier Properties ◽  
Graphene Oxide Nanosheets ◽  
Gas Barrier ◽  
Reduced Graphene ◽  
Rubber Nanocomposites ◽  
Gas Barrier Properties

scholarly journals Multifunctionality of Reduced Graphene Oxide in Bioderived Polylactide/Poly(Dodecylene Furanoate) Nanocomposite Films

Molecules ◽  
2021 ◽  
Vol 26 (10) ◽  
pp. 2938
Author(s):  
Giulia Fredi ◽  
Mahdi Karimi Jafari ◽  
Andrea Dorigato ◽  
Dimitrios N. Bikiaris ◽  
Riccardo Checchetto ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Crystallization Kinetics ◽  
Barrier Properties ◽  
Nanocomposite Films ◽  
Gas Barrier ◽  
Reduced Graphene ◽  
Variable Weight ◽  
Gas Barrier Properties

This work reports on the first attempt to prepare bioderived polymer films by blending polylactic acid (PLA) and poly(dodecylene furanoate) (PDoF). This blend, containing 10 wt% PDoF, was filled with reduced graphene oxide (rGO) in variable weight fractions (from 0.25 to 2 phr), and the resulting nanocomposites were characterized to assess their microstructural, thermal, mechanical, optical, electrical, and gas barrier properties. The PLA/PDoF blend resulted as immiscible, and the addition of rGO, which preferentially segregated in the PDoF phase, resulted in smaller (from 2.6 to 1.6 µm) and more irregularly shaped PDoF domains and in a higher PLA/PDoF interfacial interaction, which suggests the role of rGO as a blend compatibilizer. rGO also increased PLA crystallinity, and this phenomenon was more pronounced when PDoF was also present, thus evidencing a synergism between PDoF and rGO in accelerating the crystallization kinetics of PLA. Dynamic mechanical thermal analysis (DMTA) showed that the glass transition of PDoF, observed at approx. 5 °C, shifted to a higher temperature upon rGO addition. The addition of 10 wt% PDoF in PLA increased the strain at break from 5.3% to 13.0% (+145%), and the addition of 0.25 phr of rGO increased the tensile strength from 35.6 MPa to 40.2 MPa (+13%), without significantly modifying the strain at break. Moreover, rGO decreased the electrical resistivity of the films, and the relatively high percolation threshold (between 1 and 2 phr) was probably linked to the low aspect ratio of rGO nanosheets and their preferential distribution inside PDoF domains. PDoF and rGO also modified the optical transparency of PLA, resulting in a continuous decrease in transmittance in the visible/NIR range. Finally, rGO strongly modified the gas barrier properties, with a remarkable decrease in diffusivity and permeability to gases such as O2, N2, and CO2. Overall, the presented results highlighted the positive and sometimes synergistic role of PDoF and rGO in tuning the thermomechanical and functional properties of PLA, with simultaneous enhancement of ductility, crystallization kinetics, and gas barrier performance, and these novel polymer nanocomposites could thus be promising for packaging applications.

scholarly journals In-situ synthesis of Fe2O3/rGO using different hydrothermal methods as anode materials for lithium-ion batteries

2020 ◽  
Vol 59 (1) ◽  
pp. 477-487 ◽  
Author(s):  
Zhuang Liu ◽  
Haiyang Fu ◽  
Bo Gao ◽  
Yixuan Wang ◽  
Kui Li ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Oleic Acid ◽  
Lithium Ion Batteries ◽  
Reduced Graphene Oxide ◽  
Anode Materials ◽  
Lithium Ion ◽  
In Situ Synthesis ◽  
Cycle Performance ◽  
Reduced Graphene

AbstractThis paper studies in-situ synthesis of Fe2O3/reduced graphene oxide (rGO) anode materials by different hydrothermal process.Scanning Electron Microscopy (SEM) analysis has found that different processes can control the morphology of graphene and Fe2O3. The morphologies of Fe2O3 prepared by the hydrothermal in-situ and oleic acid-assisted hydrothermal in-situ methods are mainly composed of fine spheres, while PVP assists The thermal in-situ law presents porous ellipsoids. Graphene exhibits typical folds and small lumps. X-ray diffraction analysis (XRD) analysis results show that Fe2O3/reduced graphene oxide (rGO) is generated in different ways. Also, the material has good crystallinity, and the crystal form of the iron oxide has not been changed after adding GO. It has been reduced, and a characteristic peak appears around 25°, indicating that a large amount of reduced graphene exists. The results of the electrochemical performance tests have found that the active materials prepared in different processes have different effects on the cycle performance of lithium ion batteries. By comprehensive comparison for these three processes, the electro-chemical performance of the Fe2O3/rGO prepared by the oleic acid-assisted hydrothermal method is best.

In situ synthesis of V 2 O 3 nanorods anchored on reduced graphene oxide as high‐performance lithium ion battery anode

2018 ◽  
Vol 3 (43) ◽  
pp. 12108-12112 ◽  
Author(s):  
Xiaoqing Liu ◽  
Dan Zhang ◽  
Guangshe Li ◽  
Chenglin Xue ◽  
Junfang Ding ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Lithium Ion Battery ◽  
Reduced Graphene Oxide ◽  
High Performance ◽  
Lithium Ion ◽  
In Situ Synthesis ◽  
Reduced Graphene ◽  
Battery Anode

One pot in situ synthesis of nano Au–Pd core-shells embedded on reduced graphene oxide for the oxygen reduction reaction

2021 ◽  
Vol 264 ◽  
pp. 114924
Author(s):  
Periyasami Gnanaprakasam ◽  
Aruchamy Gowrisankar ◽  
Shanmugam Senthilkumar ◽  
Arumugam Murugadoss ◽  
Thangavelu Selvaraju ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Reduced Graphene Oxide ◽  
Reduction Reaction ◽  
In Situ Synthesis ◽  
One Pot ◽  
Reduced Graphene

In Situ Synthesis and Characterization of Poly(aryleneethynylene)-Grafted Reduced Graphene Oxide

2016 ◽  
Vol 22 (7) ◽  
pp. 2247-2252 ◽  
Author(s):  
Sai Sun ◽  
Xiaodong Zhuang ◽  
Bo Liu ◽  
Luxing Wang ◽  
Linfeng Gu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
In Situ Synthesis ◽  
Synthesis And Characterization ◽  
Reduced Graphene
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