Synergistic effects induced by oxy-fluorination of carbon preforms to improve the mechanical and thermal properties of carbon–carbon composites

Multifunctional surface modification of an aramid fabric via direct fluorination

“…More phenol resin was apparently attached to the surface of the aramid fabric when the fabric was fluorinated at a higher temperature. This was attributed to the fluorine-related functional groups that were reported to form electrophilic bonds with oxygen-and nitrogen-related functional groups such as -OH and -NH 2 [25][26][27]. These bonds improved the interfacial affinity of the fluorinated aramid fabrics to the -OH-rich phenol resin, resulting in a wetter resin and smoother surface for the dipped fabrics.…”

“…With more fluorine-related functional groups present, the resin impregnation into the aramid fabric improved because of the reduced abrasion of the interface between the aramid fiber and the phenol resin. The presence of surface fluorine-related functional groups usually reduces abrasion [25].…”