Study of the influence of hybrid filler on the strain sensitivity of nanocomposite material

The reflector of spacecraft is in operation in an open and folded position, so an urgent task is to develop strain gauges that determine the position of the reflector. The paper presents a study of the influence of a hybrid filler on the value of the strain resistance coefficient of a flexible strain-resistive element made of a nanocomposite material and describes the technological process of its manufacture using the vacuum infusion method. As a hybrid filler, a composition was used containing an electrically conductive component (carbon nanotubes) and a solid component (silicon carbide), which promotes uniform distribution of the filler in the polymer matrix. Using the rotational rheometer, the content of carbon nanotubes (CNTs) was determined at which the limiting level of viscosity for impregnation of glass fiber with a binder is achieved. The distribution features of the filler in the nanocomposite material were studied using a scanning electron microscope at the Krasnoyarsk Regional Center for Collective Use of the Federal Research Center KSC SB RAS. In the course of the work, the influence of the content of the hybrid filler on the tensoresistive properties of the nanocomposite material was determined. The maximum values of the tensor resistance coefficient were observed at the initial stage of the study (stretching 0.05 %): with a stretch of 0.1 mm with a total length of 200 mm for samples of nanocomposite material with a SiC hybrid filler of 1, 5 and 10 % and is 38, 40 and 40 The tensoresistance coefficient of nanocomposite material samples containing 1, 5 and 10 % SiC hybrid filler at maximum stretch (1 %) is about 19, 21 and 22, respectively.