Polyethyleneimine-functionalized graphene and its layer-by-layer assembly with Prussian blue

Effects of poly(ethyleneimine) adsorption on graphene nanoplatelets to the properties of NR/EPDM rubber blend nanocomposites

“…PEI is also highly water soluble due to ethylamine repeating units [12]. PEI can be electrostatically adsorbed on the negatively charged substrate to form the polyelectrolyte layer [13,14]. The graphene sheets were able to assemble the active amino groups in PEI to further enhance the functionalization with some active groups, such as carboxyl or epoxy groups that further extends its application [13].…”

“…This method is more economically advantageous than synthesizing a new rubber compound, which is always associated with complex technical uncertainties. Rubber blending is prepared with specific objectives in mind, such as the enhancement of physical, chemical, and mechanical performance as well as the processing characteristics [12,13]. However, there are many problems involving the compatibility and miscibility between the two rubbers phases, which later tends to diminish the end performances of the blends.…”

“…However, there are many problems involving the compatibility and miscibility between the two rubbers phases, which later tends to diminish the end performances of the blends. These include poor interfacial adhesion between rubber phases and uneven crosslinking distribution due to unbalanced saturation and polarity differences [12][13][14][15].…”

“…Vulcanized NR/ EPDM blend systems have been extensively studied because of their superior performance in tire application, as well as a significant improvement in heat and ozone resistance [22]. Despite having an attractive range of properties, excellent mechanical strength and elasticity, as well as good processing characteristic, the NR is highly unsaturated and is chemically reactive [13,21,24,25]. Hence, NR rubber is highly susceptible to degradation and is very sensitive to environmental factors such as oxygen attack by ozone, light, moisture, humidity, radiation, and heat [17,24,25].…”

Spontaneous Deposition of Prussian Blue on Reduced Graphene Oxide – Gold Nanoparticles Composites for the Fabrication of Electrochemical Biosensors

“…Prussian blue (PB) is an ideal candidate for the detection of hydrogen peroxide due to the excellent catalysis toward the reduction of hydrogen peroxide, and therefore is referred to as an "artificial peroxidase" [6]. Furthermore, PB has also been used as an effective mediator for the preparation of composite materials and construction of electrochemical sensors due to its excellent properties including low redox potentials, enhanced electron transfer rate and good electrocatalytic properties [7][8][9]. However, electroanalytical performance of PB modified electrodes becomes deteriorated at neutral electrolytes due to the hydrolysis of PB, which greatly limits the application of PB for the construction of biosensors [10].…”