气凝胶
纤维素
多孔性
化学工程
水溶液
材料科学
热稳定性
自愈水凝胶
亚甲蓝
高分子化学
化学
复合材料
有机化学
催化作用
光催化
工程类
标识
DOI:10.1016/j.ijbiomac.2018.06.167
摘要
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/cm3), 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.
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