T/CI 120-2022 Evaluation of the effect of nanoscale modification on carbon fiber surfaces

Scope

Scope: This document specifies the evaluation technical requirements and test methods for the nanomodification of carbon fiber surfaces (hereinafter referred to as "nanomodification"). This document applies to the evaluation of related technologies involving the nanomodification of carbon fiber surfaces. Main technical content: Nanomaterials are materials with one or more external dimensions, internal or surface structures at the nanoscale. [GB/T 30544.1-2014, Definition 2.4] 3.2 Carbon fiber is a fiber with a carbon content exceeding 90% (by mass) obtained by pyrolysis and recombination of organic fibers. [GB/T 40724-2021, Definition 3.1] 3.3 Monofilament is a continuous filament of a single fiber. [GB/T 40724-2021, Definition 3.31] 3.4 Tow is a combination of continuous, substantially parallel filaments. [GB/T 40724-2021, Definition 3.42] 3.5 Nanomodification of carbon fiber surface involves depositing or growing nanoparticles on the surface of carbon fiber to reconstruct the surface and obtain a new three-dimensional structure, which can improve the interfacial bonding between carbon fiber and the matrix. 3.6 Adhesion of nanomaterials refers to the adherence of nanomaterials to the surface of carbon fiber according to different modification processes. Note: Hereinafter referred to as "adhesion". 3.7 Adhesion rate of nanomaterials is the ratio of the covered area after nanomaterial adhesion to the observation area of the carbon fiber surface within a unit processing time. 3.8 Adhesion stability of nanomaterials is the ratio of the mass of the nanomodified carbon fiber bundle after a fixed processing time to the original mass of the nanomodified carbon fiber bundle. 3.9 Enhancement rate of properties of nanomodified carbon fibers is the magnitude of performance enhancement of carbon fiber or carbon fiber composites before and after nanomodification. 3.10 Effective utilization of nanomaterials is the ratio of the nanomaterial adhesion quantit

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