Structural integrity and healing efficiency study of micro-capsule based composite materials via ¹H NMR relaxometry.

ABSTRACT: In this work we present a novel approach utilizing nuclear magnetic resonance (NMR) relaxometry to assess the structural stability of microcapsules employed as self-healing agents in advanced aerospace composites both in ambient and harsh environmental conditions. We successfully correlate the amount of the encapsulated self-healing agent with the signal intensity and confirm non-destructively the quantity of the encapsulated self-healing agent mass for the first time in the literature using ¹H NMR spin-spin relaxation techniques on urea-formaldehyde (UF) microcapsules of different diameters containing an epoxy healing agent. The amount of self-healing agent is shown to increase by reducing the capsule diameter; however, the reduced shell mass renders the capsules more fragile a

SUBMITTER: Orfanidis S 

PROVIDER: S-EPMC10374639 | biostudies-literature | 2023 Jul

REPOSITORIES: biostudies-literature