Abstract：
The construction of supramolecular aerogels still faces great challenges. Herein, we present a novel bio-based supramolecular aerogel derived from G-Quadruplex self-assembly of guanosine (G), boric acid (B) and sodium alginate (SA) and the obtained GBS aerogels exhibit superior flame-retardant and thermal insulating properties. The entire process involves environmentally friendly aqueous solvents and freeze-drying. Benefiting from the supramolecular self-assembly and interpenetrating dual network structures, GBS aerogels exhibit unique structures and sufficient self-supporting capabilities. The resulting GBS aerogels exhibit overall low densities (36.5-52.4 mg/cm3), and high porosities (>95 %). Moreover, GBS aerogels also illustrate excellent flame retardant and thermal insulating properties. With an oxygen index of 47.0-51.1 %, it can easily achieve a V-0 rating and low heat, smoke release during combustion. This work demonstrates the preparation of intrinsic flame-retardant aerogels derived from supramolecular self-assembly and dual cross-linking strategies, and is expected to provide an idea for the realization and application of novel supramolecular aerogel materials.
摘要：
超分子气凝胶的构建仍面临巨大挑战。在这里，我们提出了一种新型的生物基超分子气凝胶，它来自鸟苷（G）的G-Quadruplex自组装，硼酸(B)和海藻酸钠(SA)以及所获得的GBS气凝胶表现出优异的阻燃和隔热性能。整个过程涉及环境友好的水性溶剂和冷冻干燥。受益于超分子自组装和互穿双网络结构,GBS气凝胶表现出独特的结构和足够的自支撑能力。所得的GBS气凝胶显示出整体低密度（36.5-52.4mg/cm3），和高孔隙率（>95％）。此外，GBS气凝胶还表现出优异的阻燃和隔热性能。氧指数为47.0-51.1%,它可以很容易地实现V-0等级和低热量，燃烧过程中的烟雾释放。这项工作证明了从超分子自组装和双重交联策略中制备的固有阻燃气凝胶，有望为新型超分子气凝胶材料的实现和应用提供思路。
