Non-intrusive health monitoring of infused composites with embedded carbon quantum piezo-resistive sensors

A reduced graphene oxide–borate compound-loaded melamine sponge/silicone rubber composite with ultra-high dielectric constant

“…11 To a certain extent, these advantages overcome the limitations of polymerbased ceramic ller composites and can help in the achievement of higher dielectric constants at ultralow ller concentrations; 6,12,13 therefore, these composites have broad application prospects in health monitoring, wearable electronic devices, motion sensors and electromagnetic shielding. [14][15][16] The conductive network formed by conductive llers can usually improve the electrical properties of composites. Common conductive llers are metals, 17 carbon materials [18][19][20][21] (e.g., carbon black, fullerene, graphite, graphene, reduced graphene oxide (rGO), carbon nanotubes, carbon nanobers, and carbon nanowires), and conducting polymers.…”

Multifunctional Carbon Nanotubes Enhanced Structural Composites with Improved Toughness and Damage Monitoring

“…Particularly in the boating, aeronautic, wind energy and automotive industries, the increasing use of structural composites have razed a need for the improvement of performances and the reliability of these materials. In this context CNTs have revealed to be promising multifunctional nanofillers, able to simultaneously enhance mechanical properties [36][37][38][39][40], monitor the strain [41][42][43] and predict the appearance of cracks [44][45][46][47][48][49], leading to SHM capability [50][51][52]. But the exceptional theoretical mechanical properties of CNTs resulting from a unique tubular configuration and sp 2 carbon bounding [4], although confirmed experimentally on small bundles of CNTs [53][54][55], are hardly transferrable to the composite without deterioration.…”

“…Later on, the use of a 3D conductive network within the epoxy matrix to monitor the damage of glass fiber-reinforced composite (GFRC) was demonstrated by Chou et al [41,45]. More recently, localized patches of conductive polymer nanocomposites were inserted in the core of composites made of epoxy reinforced with glass [48,51,52] and flax [64] fibers to design smart composites able to monitor structural health (SHM). The conductivity in CPC is mainly ruled by the tunneling effect, which is very sensitive to the evolution of the average gap between carbon fillers [65][66][67][68].…”

Interlaminar fracture toughness, adhesion and mechanical properties of MWCNT–glass fiber fabric composites: Effect of MWCNT aspect ratios

“…MWCNT anchored on the fiber surface can effectively transfer stress from the matrix phase to the reinforcing fibers and thus improve the fiber/matrix interfacial adhesion . To date, there are mainly three approaches to prepare multiscale MWCNT‐modified glass fibers: (1) directly growing MWCNT onto the fiber by chemical vapor deposition , (2) covering the sizing mixture containing MWCNT , and (3) depositing MWCNT onto the fiber by electrophoretic deposition , layer‐by‐layer assembly , spray‐up processing and ultrasonic‐assisted impregnation .…”