Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science and Technology, Tianjin 300457, China; Department of Chemical Engineering, University of New Brunswick, Fredericton, New Brunswick E3B 5A3, Canada.
Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science and Technology, Tianjin 300457, China.
Int J Biol Macromol. 2019 Oct 15;139:640-646. doi: 10.1016/j.ijbiomac.2019.08.022. Epub 2019 Aug 2.
Cellulose nanocrystals (CNCs) is an exciting class of sustainable and carbohydrate material, which has great potential applications in molecular adsorption. However, the complex preparation process and limited adsorption capacity of CNCs hinder its commercial application. In this study, we design a novel functional cellulose nanocrystals-based adsorbent by an ingenious mixing of lignin-containing cellulose nanocrystals (LCNCs), sodium alginate (SA), and calcium chloride solution. Benefiting from the sulfonate groups of lignin, carboxyl groups of SA, the maximum adsorptive capability of LCNCs/SA beads for methylene blue was found to be 1181 mg g, which was significantly higher than previously reported biomass-based adsorbents. More importantly, LCNCs/SA beads can be reused several times. This strategy can not only improve the adsorption performance of CNCs-based materials, but also simplify the production technology of CNCs, which greatly promote the commercial application of CNCs materials.
纤维素纳米晶体（CNCs）是一类令人兴奋的可持续碳水化合物材料，在分子吸附方面具有巨大的应用潜力。然而，CNCs 复杂的制备工艺和有限的吸附容量阻碍了其商业应用。在这项研究中，我们通过巧妙地混合含有木质素的纤维素纳米晶体（LCNCs）、海藻酸钠（SA）和氯化钙溶液，设计了一种新型功能性纤维素纳米晶体基吸附剂。得益于木质素的磺酸盐基团、SA 的羧基基团，LCNCs/SA 珠粒对亚甲基蓝的最大吸附能力被发现为 1181mg/g，明显高于之前报道的基于生物质的吸附剂。更重要的是，LCNCs/SA 珠粒可以重复使用多次。该策略不仅可以提高基于 CNCs 的材料的吸附性能，还可以简化 CNCs 的生产技术，从而极大地推动 CNCs 材料的商业应用。
