Copper/carbon nanocomposite

FIGURE 8.17 Distribution of copper/carbon nanocomposites in alcohol. 

FIGURE 8.22 IR spectrum of copper/carbon nanocomposite finely dispersed suspension in polyethylene poly amine medium (co (NC) = 1%). 

FIGURE 8.24 Changes in IR spectrum of copper/carbon nanocomposite FS based on isomethyltetrahydrophthalic anhydride with time. 

The ultimate breaking stresses were compared in the process of compression of foam concretes modified with copper/carbon nanocomposites obtained in different nanoreactors of polyvinyl alcohol [21, 22]. The sizes of nanoreactors change depending on the crystallinity and correlation of acetate and hydroxyl groups in PVA which results in the change of sizes and activity of nanocomposites obtained in nanoreactors. It is observed that the sizes of nanoeomposites obtained in nanoreactors of PVA matrixes 16/1 (ros) (NC2), PVA 16/1 (imp) (NCI), PVA 98/10 (NC3), correlate as NC3 > NC2 > NCI. The smaller the nanoparticle size the greater its activity, and the less amount of NS is required for self-organization effect. 

The fact of producing stable FS of nanocomposite on PEPA basis and increasing the operational characteristies of epoxy polymer was ascertained. It was demonstrated that the introduction of Cu/C nanocomposite into PEPA facilitates the formation of coordination bonds with nitrogen of amine groups, thus resulting in PEPA activity increase in ER hardening reactions. It was found out that the optimal time period of ultrasound processing of copper/carbon nanocomposite FS is 20 min. 

Polycarbonate modification with supersmall quantities of Cu/C nanocomposite is possible using FS of this nanocomposite which contributes to uniform distribution of nanoparticles in polycarbonate solution. Polycarbonate Actual was used as the modified polycarbonate. The FS of copper/carbon nanocomposite was prepared combining 1.0, 0.1,0.01, and 0.001% of nanocomposite in polycarbonate solution in ethylene dichloride. The suspensions underwent ultrasonic processing. 

In IR spectrum of copper/carbon nanocomposite two bands with a high relative area are found at ... 

According to the investigations with transmission electron microscopy the formation of carbon nanofilm structures consisting of carbon threads is characteristic for copper/carbon nanocomposite. In contrast, carbon fiber structures, including nanotubes, are formed in nickel/carbon nanocomposite. There are several absorption bands in the range 2800-3050 cm which are attributed to valence oscillations of C-H bonds in aromatic and aliphatic compounds. These absorption bonds are connected with the presence of vaselene oil in the sample. It is difficult to find the presence of metal in the composite as the metal is stabilized in carbon nanostmcture. At the same time, it should be pointed out that apparently nanocomposites influence the structure of vaselene oil in different ways. The intensities and number of bands for Cu/C and Ni/C nanocomposites are different for ... 

FIGURE 1.8 Distribution of copper/carbon nanocomposites in alcohol (a) in water (b). 

FIGURE 1.12 Changes in IR spectrum of copper/carbon nanocomposite fine suspension based on isomethyltetrahydrophthalic anhydride with time, (a - IR spectrum on the first day after the nanocomposite was introduced, 5 - IR spectrum on the second day, c - IR spectrum on the third day). 

The ultimate breaking stresses were compared in the process of compression of foam concretes modified with copper/carbon nanocomposites obtained in different nanoreactors of polyvinyl alcohol [13, 14]. The sizes of nanoreactors change depending on the crystallinity and correlation of acetate and hydroxyl groups in PVA, which results in the change of sizes... 

According to the investigations with transmission electron microscopy the formation of carbon nanofilm structures consisting of carbon threads is characteristic for copper/carbon nanocomposite. In contrast, carbon fiber structures, including nanotubes, are formed in nickel/carbon nanocomposite. 

The distribution of nanoparticles in water, alcohol and water-alcohol suspensions prepared based on the above technique are determined with the help of laser analyzer. In Figs. 12.1 and 12.2, one can see distributions of copper/carbon nanocomposite in the media different polarity and dielectric penetration. 

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