Carbon foam based on nature biomass resources has great prospective applications in water treatment, sensors, electronic devices, and electromagnetic shielding materials due to their low cost, stable surface properties, and excellent mechanical–electrical properties. Here, we reported a multifunctional carbon material with a 3D network structure from low cost and renewable cotton by a thermal decomposition method. Graphene oxide (GO) was adsorbed in cotton foam via a “dip-and-dry” method and thermal reduced to reduced graphene oxide (rGO) forming carbonized cotton/reduced graphene oxide (CC/rGO) foam. Compared with pure CC foam, the hydrophobicity and mechanical–electrical properties of CC/rGO foam were significantly enhanced because the foam structure was optimized by the introduction of rGO. The CC/rGO foam exhibited high oil–water separation capability (16–27 times of its own weight), mechanical stability (stable compression with 100,000 cycles), and satisfactory electromagnetic interference (EMI) shielding effectiveness (36 dB). These results illuminate a facile and sustainable strategy to modify and fabricate multifunctional biomass carbon foam.

中文翻译：

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用于快速油水分离，灵活的压力应变传感器和电磁干扰屏蔽的多功能生物质碳泡沫

基于天然生物质资源的碳泡沫由于其低成本，稳定的表面特性以及出色的机械-电气特性，在水处理，传感器，电子设备和电磁屏蔽材料中具有广阔的应用前景。在这里，我们通过热分解方法从低成本和可再生棉中报告了一种具有3D网络结构的多功能碳材料。氧化石墨烯（GO）通过“浸涂-干燥”方法吸附在棉泡沫中，并热还原成还原的氧化石墨烯（rGO），形成碳化的棉/还原的氧化石墨烯（CC / rGO）泡沫。与纯CC泡沫相比，CC / rGO泡沫的疏水性和机电性能得到了显着提高，因为通过引入rGO可以优化泡沫结构。CC / rGO泡沫具有很高的油水分离能力（是其自重的16-27倍），机械稳定性（在100,000次循环中稳定压缩）和令人满意的电磁干扰（EMI）屏蔽效果（36 dB）。这些结果阐明了一种改性和制造多功能生物质碳泡沫的简便而可持续的策略。