Laser-induced graphene on Kevlar enables multifunctional structural composites

Researchers from IMDEA Materials Institute, Polytechnic University of Madrid, University Rey Juan Carlos, Universidad Politécnica de Madrid (UPM), National Institute for Aerospace Technology (INTA) and Universidad Francisco de Vitoria have developed a multifunctional fiber-reinforced polymer composite that integrates strain sensing, electromagnetic shielding and thermal management within a structural laminate.

The team fabricated laser-induced graphene (LIG) directly on Kevlar fabric via laser photothermal conversion, then incorporated this LIG@Kevlar layer into basalt fiber/biobased epoxy laminates using vacuum infusion, a process compatible with industrial-scale manufacturing. This in-situ conversion strategy avoids separate LIG films or transfer steps, helping to maintain interlaminar integrity and eliminating foreign interfaces that could otherwise weaken the composite.

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