Post by williamplayer on Jan 23, 2014 12:25:58 GMT
Graphene-Based Polymer Composites and Their Applications
Introduction
The field of nanoscience has blossomed over the last two decades and the importance of nanotechnology increase in areas such as computing, sensors, biomedical and many other applications. In this regard the discovery of graphene and graphene-based polymer nanocomposites is an important addition in the field of nanoscience. Graphene, a single-layer carbon sheet with a hexagonal packed lattice structure, has shown many unique properties such as the quantum Hall effect (QHE), high carrier mobility at room temperature, large theoretical specific surface area, good optical transparency, high Young’s modulus and excellent conductivity. The superior properties of graphene compared to polymers are reflected in graphene-based polymer composites. Graphene-based polymer composites show superior mechanical, thermal, gas barrier, electrical and flame retardant properties, compared to the neat polymer. It was also reported that the improvement in mechanical and electrical properties of graphene-based polymer composites are much better in comparison to that of clay or other carbon filler-based polymer composites. Although carbon nanotube (CNTs) show comparable mechanical properties to graphene, still graphene is a better nanofiller than CNT in certain aspects such as thermal and electrical conductivity. The physicochemical properties of the nanocomposite depend on the distribution of graphene layers in the polymer matrix as well as interfacial bonding between the graphene layers and polymer matrix. Pristine graphene is not compatible with organic polymers and does not form homogeneous composites. In contrast, graphene oxide (GO) sheets are more compatible with organic polymers, as a result GO has attracted considerable attention as a nanofiller for polymer nanocomposites. Unlike graphene, graphene oxide is electrically insulating, which makes it unsuitable for synthesis of conducting nanocomposites.
Read Full Article: research.che.tamu.edu/groups/seminario/Materials_CHEN313_Spring_2013/special%20assigment%20reference%20papers/Materials_G17_Graphene-Based%20Polymer%20Composites%20.pdf
Introduction
The field of nanoscience has blossomed over the last two decades and the importance of nanotechnology increase in areas such as computing, sensors, biomedical and many other applications. In this regard the discovery of graphene and graphene-based polymer nanocomposites is an important addition in the field of nanoscience. Graphene, a single-layer carbon sheet with a hexagonal packed lattice structure, has shown many unique properties such as the quantum Hall effect (QHE), high carrier mobility at room temperature, large theoretical specific surface area, good optical transparency, high Young’s modulus and excellent conductivity. The superior properties of graphene compared to polymers are reflected in graphene-based polymer composites. Graphene-based polymer composites show superior mechanical, thermal, gas barrier, electrical and flame retardant properties, compared to the neat polymer. It was also reported that the improvement in mechanical and electrical properties of graphene-based polymer composites are much better in comparison to that of clay or other carbon filler-based polymer composites. Although carbon nanotube (CNTs) show comparable mechanical properties to graphene, still graphene is a better nanofiller than CNT in certain aspects such as thermal and electrical conductivity. The physicochemical properties of the nanocomposite depend on the distribution of graphene layers in the polymer matrix as well as interfacial bonding between the graphene layers and polymer matrix. Pristine graphene is not compatible with organic polymers and does not form homogeneous composites. In contrast, graphene oxide (GO) sheets are more compatible with organic polymers, as a result GO has attracted considerable attention as a nanofiller for polymer nanocomposites. Unlike graphene, graphene oxide is electrically insulating, which makes it unsuitable for synthesis of conducting nanocomposites.
Read Full Article: research.che.tamu.edu/groups/seminario/Materials_CHEN313_Spring_2013/special%20assigment%20reference%20papers/Materials_G17_Graphene-Based%20Polymer%20Composites%20.pdf