Abstract

Cationic cellulose nanocrystals (CCNCs) with more cationic groups were yielded when dialdehyde cellulose nanocrystals with more aldehyde groups were reacted with (2-hydrazinyl-2-oxoethyl)-trimethylazanium chloride (GT reagent), keeping the other conditions constant. CCNCs were proved to possess high adsorption capacity toward reactive blue 19 (RB 19). To make nanocrystals more easily separated from aqueous solutions at the end of dye adsorption and simultaneously improve the acid resistance of chitosan (CTS), CCNC₃ with 1.914 mmol g⁻¹ of nitrogen was filled into CTS to fabricate the nanocomposite films by solution casting technique. Equilibrium and dynamic studies indicated that both the filler of CCNC₃ and the matrix of CTS in the nanocomposite films made a synergistic contribution to dye removal. The nanocomposite film with the CCNC₃/CTS weight ratio of 12/100 got the dye adsorption capacity of 900 mg g⁻¹ at the adsorbent dosage of 100 mg L⁻¹, 25 °C and pH 3 of RB 19 solution.

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摘要

当具有更多醛基的二醛纤维素纳米晶体与（2-肼基-2-氧代乙基）-三甲基a鎓氯化物（GT试剂）反应时，可得到具有更多阳离子基团的阳离子纤维素纳米晶体（CCNC）。事实证明CCNC对活性蓝19（RB 19）具有高吸附能力。为了使纳米晶体在染料吸附结束时更容易从水溶液中分离出来并同时提高壳聚糖（CTS）的耐酸性，将具有1.914 mmol g ^-1的氮的CCNC ₃填充到CTS中以通过溶液流延技术制备纳米复合膜。平衡和动态研究表明CCNC ₃的填充物纳米复合薄膜中的CTS基质对染料的去除起到了协同作用。与CCNC纳米复合膜₃的12/100 / CTS重量比得到了900毫克克染料吸附容量^-1在100毫克的L的吸附剂用量^-1，25℃和19 RB溶液pH为3。

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