Environmentally Friendly Sizing Strategy for PBO Fiber-reinforced Composites through Building Carbon Nanosphere Coatings

Bottom-Up Strategy toward Heterocyclic Aramid Nanofibers and Their Application in Strengthening Poly(p-phenylene benzodioxazole) Paper via Constructing a Bilayer Asymmetric Structure

“…Poly(p-phenylene benzobisoxazole) (PBO) paper is a specialty paper-based material prepared by the traditional wet papermaking process from PBO fibers with properties superior to para-aramid fibers. It has shown great potential in the field of electric power due to its high level of heat resistance, 16,17 flame retardancy, 18 and insulation. 19,20 However, weak interactions between fibers results in a loose and porous structure and hence inferior mechanical strength, which are thorny issues faced by all specialty papers made from highperformance fibers.…”

“…Poly­( p -phenylene benzobisoxazole) (PBO) paper is a specialty paper-based material prepared by the traditional wet papermaking process from PBO fibers with properties superior to para-aramid fibers. It has shown great potential in the field of electric power due to its high level of heat resistance, , flame retardancy, and insulation. , However, weak interactions between fibers results in a loose and porous structure and hence inferior mechanical strength, which are thorny issues faced by all specialty papers made from high-performance fibers. , Although the mechanical properties of PBO paper can be improved by resin impregnation, − the poor heat resistance of the developed resins fail to match with PBO paper and restrict its application in extreme environments with high temperature. In our previous work, PBO nanofibers (PBONFs) prepared by the top-down method were employed as a new type of resin to reinforce PBO paper, which improved its mechanical properties while maintaining the ultrahigh heat resistance.…”

Mechanically Robust Fluorinated Graphene/Poly(p-Phenylene Benzobisoxazole) Nanofiber Films with Low Dielectric Constant and Enhanced Thermal Conductivity: Implications for Thermal Management Applications

“…Poly­( p -phenylene benzobisoxazole) (PBO), as one kind of polymer liquid crystal, has achieved the mature industrial production in its fiber form. , During the spinning process, the rigid molecular chains of PBO are highly oriented along the fiber axis, which endows it with superior mechanical strength and TC . In addition, the absence of any polar groups in the PBO molecule also allows it to have the low dielectric constant and dielectric loss .…”

Structural Regulation of Poly(benzoxazole imide)s and Their Composites with Fluorinated Graphene to Construct High-Performance Low Dielectric Films

“…Polybenzoxazole (PBO) is an aromatic heterocyclic polymer characterized by the conjugation of benzene and oxazole rings. The rigid rod-like structure and strong intermolecular interactions endow PBO with excellent mechanical properties, heat resistance, flame retardancy, and chemical stability but at the same time make it insoluble in common solvents and infusible. − To date, PBO has remained difficult to process unless spun into fibers in polyphosphoric acid by a unique liquid crystal spinning technique. Modifying PBO to overcome processing hurdles and broaden application fields is of great significance but still faces enormous challenges. , …”