Advances in 3D printing for polymer composites: A review

Abstract

The potential of three‐dimensional (3D) printing technology in the fabrication of advanced polymer composites is becoming increasingly evident. This review discusses the latest research developments and applications of 3D printing in polymer composites. First, it focuses on the optimization of 3D printing technology, that is, by upgrading the equipment or components or adjusting the printing parameters, to make them more adaptable to the processing characteristics of polymer composites and to improve the comprehensive performance of the products. Second, it focuses on the 3D printable novel consumables for polymer composites, which mainly include the new printing filaments, printing inks, photosensitive resins, and printing powders, introducing the unique properties of the new consumables and different ways to apply them to 3D printing. Finally, the applications of 3D printing technology in the preparation of functional polymer composites (such as thermal conductivity, electromagnetic interference shielding, biomedicine, self‐healing, and environmental responsiveness) are explored, with a focus on the distribution of the functional fillers and the influence of the topological shapes on the properties and functional characteristics of the 3D printed products. The aim of this review is to deepen the understanding of the convergence between 3D printing technology and polymer composites and to anticipate future trends and applications.image

Ultrafine Aramid Nanofiber-Assisted Large-Area Dense Stacking of MXene Films for Electromagnetic Interference Shielding and Multisource Thermal Conversion

“…The rapid development of wireless wearable electronic devices inevitably leads to electromagnetic radiation pollution, which affects the normal operation of precision equipment and people’s health. − In consequence, flexible electromagnetic interference (EMI) shielding films rise in response to the proper time and conditions. Moreover, in response to the microminiaturization and integration of devices, the flexible EMI shielding films put forward the higher requirements in mechanical properties and EMI shielding efficiency at ultrathin thickness. − To date, attributing to the unique “brick-mortar” structure, the nacre-like lamellar films composed of conductive fillers and polymer binders exhibit the advantages of ultrathin thickness, lightweight, high flexibility, excellent mechanical properties, and easy processing. , To ensure the high electrical conductivity and EMI shielding performance of nacre-like lamellar films, the highly oriented and dense stacking of conductive fillers is the key, yet is the challenge in large-scale preparation.…”

Dense Hydrogen Bond Network Design of High-Strength Glycidyl Ester to Enhance the Mechanical Properties of Its CFRPs

“…Epoxy, as a quintessential thermosetting resin, has been widely utilized across various industries since its inception. − Its excellent mechanical properties, adhesive capabilities and processability have garnered significant attention and research in the field of carbon fiber reinforced polymer (CFRP) composites. , In CFRPs, as the fiber content increases, the composites can achieve or surpass the mechanical strength comparable to metals, with the resin matrix playing a critical role. , Typically, the axial compressive strength of CFRP composites is much lower than their tensile strength. This disproportion between compressive and tensile properties hinders its advancement as a substitute for traditional metal materials like aluminum alloys. , Therefore, enhancing the compression performance of CFRP composites becomes the key to addressing this issue and is also an important research topic.…”