Biomass aerogels are potential adsorbent materials with abundant resources and high performance. However, biomass aerogels often suffer from poor water resistance, which is deadly for their application in water remediation. In this study, a kind of biomass aerogel with excellent water resistance was prepared by using cellulose nanofiber (CNF) and gelatin as the substrate and γ-(2,3-epoxypropoxy) propytrimethoxysilane trimethoxysilane (GPTMS) as the crosslinking agent. The composite aerogel was characterized by Fourier transform infrared, x-ray diffraction, and x-ray photoelectron spectroscopy, and the results showed that a cross-linked network formed by CNF, GPTMS, and gelatin can significantly improve the strength of the composite aerogels. The cross-linking strategy reported in this paper overcomes the defects that CNF is easily dispersed in water and gelatin is easily dissolved in water. Moreover, CNF/gelatin aerogel can adsorb both anionic and cationic dyes. And, the maximum adsorption capacity of CGK aerogel on MB and CR was 182.6 mg/g and 590.6 mg/g, respectively. The prepared aerogel can maintain excellent structural stability under acidic or alkaline conditions, which lays a foundation for its recyclability. Therefore, CGK composite aerogels may have potential applications in wastewater treatment due to their environmental sustainability.

生物质气凝胶是资源丰富、性能优良的潜在吸附材料。然而，生物质气凝胶往往耐水性差，这对其在水体修复中的应用是致命的。本研究以纤维素纳米纤维（CNF）和明胶为基材，γ-（2,3-环氧丙氧基）丙基三甲氧基硅烷（GPTMS）为交联剂，制备了一种具有优异耐水性的生物质气凝胶。通过傅里叶变换红外、X射线衍射和X射线光电子能谱对复合气凝胶进行了表征，结果表明，CNF、GPTMS和明胶形成的交联网络可以显着提高复合气凝胶的强度。本文报道的交联策略克服了CNF易分散于水中和明胶易溶解于水的缺陷。此外，CNF/明胶气凝胶可以吸附阴离子和阳离子染料。并且，CGK气凝胶对MB和CR的最大吸附容量分别为182.6 mg/g和590.6 mg/g。所制备的气凝胶在酸性或碱性条件下均能保持优异的结构稳定性，为其可回收性奠定了基础。因此，CGK复合气凝胶由于其环境可持续性，可能在废水处理中具有潜在的应用。