利用 pH 响应性纤维素纳米晶体控制 CO₂ 微藻絮凝。
CO₂ controlled flocculation of microalgae using pH responsive cellulose nanocrystals.
机构信息
Renewable Materials and Nanotechnology Research Group, KU Leuven - Campus Kortrijk, Etienne Sabbelaan 53 box 7659, 8500 Kortrijk, Belgium.
出版信息
Nanoscale. 2015 Sep 14;7(34):14413-21. doi: 10.1039/c5nr03853g.
Cellulose nanocrystals were grafted with imidazole functionalities up to DS 0.06 using a one-pot functionalization strategy. The resulting nanocrystals were shown to have a pH responsive surface charge which was found to be positive below pH 6 and negative above pH 7. These imidazolyl cellulose nanocrystals were tested for flocculation of Chlorella vulgaris using CO2 to induce flocculation. Up to 90% flocculation efficiency was achieved with 200 mg L(-1) dose. Furthermore, the modified cellulose nanocrystals showed good compatibility with the microalgae during cultivation, giving potential for the production of reversible flocculation systems.
采用一锅法功能化策略，将纤维素纳米晶接枝到咪唑功能团，取代度达到 0.06。结果表明，所得纳米晶具有 pH 响应表面电荷，在 pH 值低于 6 时带正电荷，高于 7 时带负电荷。使用 CO2 诱导絮凝，对这些咪唑基纤维素纳米晶进行了絮凝小球藻的试验。在 200mg/L 剂量下，絮凝效率高达 90%。此外，改性纤维素纳米晶在培养过程中与微藻具有良好的相容性，为可逆絮凝体系的生产提供了可能。
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