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Determination of Adhesive Bond Strength between Carbon Fibers and Epoxy Matrix
Summary
This paper is actually about materials engineering, not human health, it studies how well carbon fibers stick to a plastic resin (epoxy) to make stronger composite materials, like those used in aerospace or car parts. Note: "microplastics" here refers to a specific small-scale test sample used in manufacturing, not the environmental pollutant of the same name that's linked to health concerns, so this research has no direct connection to human health or plastic pollution in the body.
Abstract A comparative analysis of modern methods to estimate the adhesive strength between carbon fiber and epoxy binder is outlined. A new method for studying adhesive strength is proposed. It makes use of analyzing properties of carbon fiber bundles combined with accounting for the process of obtaining microplastics. Two grades of carbon fibers—UMT42S-3K-EP and UMT49S-12K-EP—manufactured by Alabuga-Volokno LLC are selected as the objects for the study. An epoxy binder of the VSE-30 brand, developed at the National Research Center Kurchatov Institute—VIAM, is used as the matrix. The features of testing samples to determine adhesive strength using the improved knot method are presented. Optimal parameters for forming the adhesive cell are proposed. The fracture zone of the adhesive joint between the carbon fiber and the epoxy matrix is examined using optical microscopy.