School of Materials Science & Engineering, Key Laboratory of Advanced Technologies of Materials (Ministry of Education), Southwest Jiaotong University, Chengdu, 610031, China.
School of Materials Science & Engineering, Key Laboratory of Advanced Technologies of Materials (Ministry of Education), Southwest Jiaotong University, Chengdu, 610031, China.
Carbohydr Polym. 2018 Oct 15;198:546-555. doi: 10.1016/j.carbpol.2018.06.112. Epub 2018 Jun 28.
As one of the materials from natural resources, the functionalization and application of cellulose attract increasing concerns. In this work, we reported a facile method to prepare the bio-inspired functionalization of microcrystalline cellulose (MCC) aerogel through polydopamine (PDA) coating, which was realized via the self-polymerization of dopamine in the MCC/LiBr solution followed by the freeze-drying technology. The morphological characterization showed that the pore morphologies of the compounded aerogel were influenced by the content of PDA. Adsorption measurements toward methylene blue (MB) showed that the compounded aerogel had high adsorption ability. Moreover, the compounded MCC/PDA aerogel exhibited excellent adsorption selectivity and it exhibited high efficiency to remove MB from different solutions, such as the mixed solution with anionic dyestuffs, the mixed solution with cationic dyestuffs and the mixed solution with common salt (NaCl). The high adsorption ability and excellent adsorption selectivity endows the compounded MCC/PDA aerogel with great potential applications in wastewater treatment.
作为自然资源的一种材料，纤维素的功能化和应用引起了越来越多的关注。在这项工作中，我们通过多巴胺（PDA）涂层报道了一种简便的方法来制备仿生功能化的微晶纤维素（MCC）气凝胶，该方法通过在 MCC/LiBr 溶液中的多巴胺自聚合，然后通过冷冻干燥技术来实现。形态特征表明，复合气凝胶的孔形态受 PDA 含量的影响。对亚甲基蓝（MB）的吸附测量表明，复合气凝胶具有很强的吸附能力。此外，复合 MCC/PDA 气凝胶表现出优异的吸附选择性，能够高效地从不同溶液中去除 MB，如阴离子染料的混合溶液、阳离子染料的混合溶液和普通盐（NaCl）的混合溶液。高吸附能力和优异的吸附选择性赋予了复合 MCC/PDA 气凝胶在废水处理方面具有巨大的应用潜力。
