Filling with the Graphene Nanoplates as a Way to Improve Properties of Epoxy-Composites for Industrial and Geophysical Machinery

Abstract

It is established that the filling with graphenes increases (by 1.3-1.8 times) the strength at normal adhesion to steel. At same time, filling reduces the compressive strength and abrasion resistance and also resistance to aggressive liquids (conc. nitric acid, chloromethylene; mixture acetone-ethylacetate). The most probable reason for this may be the features of the graphene plate structure, prone to deactivation (self-rotation) of particles and therefore sensitive to the technology of hardening. Studies have shown the limited positive effects of graphene as a filler of epoxydes, although its introduction can significantly improve certain practical characteristics (adhesion, thermal and electrical conductivity).

"Combined Mobile Unit for Supercritical CO2-Extraction of Bio-Active Components"

“…There are problems in logistics -since in countries with a rich resource base there is no infrastructure, but there are long distances [1,2,8]. A lot of dissertations, patents and monographic works [4,8,[13][14][15]21] are devoted to the solution of these problems. A good comparison of pre-and supercritical extraction methods is seen from Table 2.…”

“…Economically, SCFE technologies are justified in the case of processing high-value raw materials with a high content of biologically active substances (biologically active substances), especially plants, which are the halo of growth, which is a given territory. In our scientific arsenal there are developments in processing technologies: seeds of flax, thyme, amaranth, millet, rose hips, and a method for obtaining extracts from plant raw materials has been worked out[21].The extraction process is determined by the following main indicators: extraction time, temperature and pressure in the extractor, temperature and pressure in two separators, gas phase flow rate. Development of optimal technological modes of fluid extraction of raw materials is carried out according to such indicators: pressure, temperature, cycle time, rational product yield, flow rate, modulation of CO 2 flow and pressure, optimal humidity, etc.…”

Determining the strength and thermal­, chemical resistance of the epoxy polymer­composite filled with basalt micronano fiber in the amount of 15–80 % by weight

“…3. Note that acetone and its solutions are very aggressive environments for polyepoxides, as is it known [25] from studies [26,27]. Since acetone is found in many industrial and household solvents, the issue of increasing the durability of composites in it is very important.…”

Resistance and Strength of Bio-Compatible Epoxy-Cellulose Composites, as A Function of Concentration and Dispersity of Cellulose Filler

“…Composites based on epoxy oligomers filled by fibers and biomaterials, due to their high adhesion, heat resistance, low shrinkage during curing and other properties, are widely used as sealing compounds for repair materials, adhesives, compounds and glues [1][2][3][4][5]. There is a growing trend to use cellulose biomaterials as fillers and/or reinforcers in epoxy polymer composites.…”