Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250199, PR China.
Int J Biol Macromol. 2018 Oct 15;118(Pt A):921-931. doi: 10.1016/j.ijbiomac.2018.06.167. Epub 2018 Jun 30.
This work reported a facile approach to make cellulose-based aerogels in NaOH/urea aqueous solution via freeze-drying hydrogels, which were obtained by mixing N,N'-methylene bisacrylamide (MBA) with cellulose solution at room temperature. The cellulose solution showed pronounced MBA-induced gelation behaviors. The obtained cellulose aerogels possessed a three dimensional network with macroporous structure (20-600 μm), low density (0.0820-0.0083 g/cm), high porosity (90.3%-99.02%), moderate thermal stability (275 °C) and certain absorbency to Cu (II) (85 mg/g) and methylene blue (MB) (115 mg/g). Cellulose aerogels with different morphologies can be obtained by adjusting the cross-linking degree and the concentration of cellulose. This kind of aerogel provides an excellent matrix for the functionalization of cellulose-based aerogel.
这项工作报道了一种通过冷冻干燥水凝胶在 NaOH/尿素水溶液中制备纤维素气凝胶的简便方法，该水凝胶是通过将 N,N'-亚甲基双丙烯酰胺 (MBA) 与纤维素溶液在室温下混合制得。纤维素溶液表现出明显的 MBA 诱导的胶凝行为。所得纤维素气凝胶具有三维网络结构，具有大孔结构（20-600μm）、低密度（0.0820-0.0083g/cm）、高孔隙率（90.3%-99.02%）、适度的热稳定性（275°C）和对 Cu（II）（85mg/g）和亚甲基蓝（MB）（115mg/g）的一定吸附能力。通过调整交联度和纤维素浓度可以得到具有不同形态的纤维素气凝胶。这种气凝胶为纤维素基气凝胶的功能化提供了一个极好的基质。
