2026-10-14T12:26:34Z https://www.scidb.cn/oai

10.57760/sciencedb.j00125.00096 2026-09-13T20:15:21Z

2026-09-13 Acid-Catalyzed Construction of High-Performance Polybenzoxazine-Based Carbon Aerogels with Tunable Multiscale Structures doi:10.57760/sciencedb.j00125.00096 en Carbon aerogels are promising porous carbon materials owing to their low density and hierarchical pore structures; however, their practical deployment remains hindered by complex drying strategies and insufficient structural robustness of the carbon framework. Herein, we report a catalyst-directed polymerization pathway engineering strategy for the construction of polybenzoxazine-derived carbon aerogels via an acid-catalyzed sol–gel process combined with ambient-pressure drying. By systematically tuning the hydrochloric acid dosage, the relative participation of carbocation- and iminium-derived crosslinking reactions was regulated, giving rise to precursor networks with distinct crosslinking densities and structural compactness. These chemically defined precursor architectures were largely inherited during carbonization, resulting in carbon frameworks with distinct microcrystalline continuity and hierarchical pore structures. The optimized aerogels achieved densities of 0.224–0.308 g·cm-3, compressive strengths up to 5.80 MPa, and thermal conductivities of 0.072–0.096 W·m-1·K-1, demonstrating that microcrystalline reinforcement of the pore-wall skeleton can enhance mechanical performance without severely compromising thermal insulation. This work establishes polymerization pathway engineering at the precursor stage as a governing principle for microstructural inheritance and carbon-framework reinforcement, providing chemical insight into the rational design of polymer-derived porous carbons with balanced mechanical and thermal functionalities.  Carbon aerogels; polybenzoxazine; acid-catalyzed polymerization; microstructure; mechanical properties 李伟 陈子涵 马兆昆 何岩 李睿洋 孙闯 王佩佩 张恒晋 PUBLIC https://creativecommons.org/licenses/by/4.0/ dataset Science Data Bank