Light triggered interfacial damage self-healing of poly(p-phenylene benzobisoxazole) fiber composites

Abstract

The interfacial microcracks in the resin matrix composites are difficult to be detected and repaired. However, the self-healing concept provides opportunities to fabricate composites with unusual properties. In the present study, photothermal conversion Ag-CuS nanoparticles were immobilized onto poly(p-phenylene benzobisoxazole) (PBO) fibers via a polydopamine chemistry. Benefitting from the photothermal effects of Ag-CuS, the obtained PBO fibers (Ag-CuS-PBO) efficiently converted the light energy into heat under Xenon lamp irradiation. Then, single PBO fiber composites were prepared using thermoplastic polyurethane as the matrix. It was found that the interfacial damage caused by single fiber pull-out was simply self-healed by Xe light irradiation. This wonderful interfacial damage self-healing property was mainly attributed to the in situ heating generation via photothermal effects of Ag-CuS in the composite interface. This paper reports a novel strategy to construct advanced composites with light-triggered self-healing properties, which will provide inspiration for preparing high performance composite materials.

Fast and Efficient Electric‐Triggered Self‐Healing Shape Memory of CNTs@rGO Enhanced PCLPLA Copolymer

“…Shape memory polymers, as one class of typical representatives of smart polymeric materials, can memorize and recover to their shapes under external stimuli, such as heat, PH, light, and electric field, which have been widely applied in many practical fields including aerospace, transportation, and biomedicine . Self‐healing polymers can be healed autonomously to restore some or all of the functions and mechanical behaviors, which would improve their service life, safety, and reliability . Polylactic acid (PLA) is used as biological medical sutures and implants owing to its high biocompatibility and biodegradability .…”

Low‐Temperature Cross‐Linkable Small Molecules for Fully Solution‐Processed OLEDs

“…Uracil has the advantage of being capable of hydrogen bonding between uracils and forming strong hydrogen bonds. Uracil can also be used as a self‐healing material using hydrogen‐bonding property . Therefore, we selected the uracil group as a hydrogen bonding functional group.…”

“…Uracil can also be used as a self-healing material using hydrogen-bonding property. [31,32] Therefore, we selected the uracil group as ah ydrogen bonding functional group. The synthesized compounds based on the uracil group are capable of being solutionp rocessed andt hermally cross-linked at temperaturesa sl ow as 120 8C.…”

Friction and Mechanical Properties of Highly Filled Polybenzoxazine Composites: Nanosilica Particle Size and Surface Treatment

“…Since then, several other highly filled composites based on polybenzoxazines for various interesting applications have been reported such as in high thermally conductive composites, wood substituted polybenzoxazine composites, bipolar plate composites, and friction wear . Typically, the polymer matrix, reinforcement, and the adhesion between the matrix resin and the filler are the key factors controlling properties of composite materials . Moreover, the properties of the composites also count on the high packing density composites, depending on volume, particle shape and size, size distribution, characteristic of filler, and the layer of the polymer matrix between the particles should be as thin as possible, to maintain a good mechanical property for the applications .…”