从毛轴莎草中制备纤维素纳米晶体及其在亚甲基蓝吸附中的应用。
Fabrication of cellulose nanocrystal from Carex meyeriana Kunth and its application in the adsorption of methylene blue.
机构信息
College of Textiles, Donghua University, Shanghai 201620, PR China; The Key Lab of Textile Science & Technology, Ministry of Education, Donghua University, Shanghai 201620, PR China.
College of Textiles, Donghua University, Shanghai 201620, PR China; The Key Lab of Textile Science & Technology, Ministry of Education, Donghua University, Shanghai 201620, PR China.
出版信息
Carbohydr Polym. 2017 Nov 1;175:464-472. doi: 10.1016/j.carbpol.2017.08.007. Epub 2017 Aug 4.
Cellulose nanocrystal (CNC) was extracted from Carex meyeriana Kunth (CMK) by a combination of TEMPO oxidation and mechanical homogenization method, and used to remove methylene blue (MB) from aqueous solution. After alkali-oxygen treatment, the aqueous biphasic system (polyethylene glycol/inorganic salt) was applied to further remove lignin from CMK. The characteriazation of CNC, and the effects of HO dosage, CNC dosage, adsorption time, and initial MB concentration on the MB removal capacity of CNC were investigated. The results showed that the removal percentage of MB by CNC was raised with the increase of HO and CNC dosage. The adsorption kinetics of prepared CNC followed the pseudo-second-order model, and the adsorption isotherms fitted well to the Langmuir model with a calculated maximum adsoption capacity of 217.4mg/g, which was higher than those of CNC extracted by acid hydrolysis method, indicating CNC extracted from CMK had promising potentials in the field of MB adsorption.
纤维素纳米晶（CNC）通过 TEMPO 氧化和机械均化法从薹草（Carex meyeriana Kunth）中提取，并用于从水溶液中去除亚甲基蓝（MB）。经过碱-氧处理后，采用双水相体系（聚乙二醇/无机盐）进一步从 CMK 中去除木质素。对 CNC 的特性以及 HO 用量、CNC 用量、吸附时间和初始 MB 浓度对 CNC 去除 MB 能力的影响进行了研究。结果表明，随着 HO 和 CNC 用量的增加，MB 的去除率提高。制备的 CNC 的吸附动力学符合拟二级模型，吸附等温线很好地符合 Langmuir 模型，计算出的最大吸附容量为 217.4mg/g，高于酸水解法提取的 CNC，表明从 CMK 中提取的 CNC 在 MB 吸附领域具有广阔的应用前景。
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