Novel Zwitterionic Copolymers with Dihydrolipoic Acid: Synthesis and Preparation of Nonfouling Nanorods

离心 上清液除去 添水重新分散 再离心 多洗多离心几次 100mM的浓度一般离心三次即可 但是仍会残留少量 如果洗的次数太多 会聚集
也可以用乙醇 不过CTAB在乙醇中的溶解度比较大 即使洗一次以后 也很大程度会聚集

我知道有两种方式，一种是分散到乙醇中，加热回流一到两天，重复三次以上，基本上可以除掉CTAB，另外一种就是分散于酸性乙醇中，然后超声处理几次。

In a typical procedure of synthesis silica cages (MSC-12), 2.38 g CTAB was dissolved in 50 ml deionized water at 50 oC under vigorous stirring to form a clear solution. 0.75 g SS and 2.2 ml EA were added in the clear solution at 23 oC under vigorous stirring conditions in 5 min, and the synthesis system was kept at 23 oC static reaction for 16 h. Then the mixture solution was evaporated to dryness at 60 oC for 12 h to give a white solid. The white solid was allowed to age in ethanol (~ 100 ml) at room temperature (28 oC) for 24 h, after removal ethanol, and this procedure was repeated again. (Most of templates would be removed in this process.) The products were desiccated at room temperature, and the dried white powders were calcined at 650 oC for 6 h. （J. Mater. Chem., 2008, 18, 5967）

（1）利用丙酮 80 °C 加热回流 48 h 浸取 CTAB，将该回流过程反复进行三次；（2）利用盐酸乙醇溶液（pH≈1）浸取 CTAB，70 °C 加热回流 2 h，并将该过程重复进行两次（可用索氏提取器反应24h）；（3）利用硝酸铵（NH4NO3）的乙醇溶液和 CTAB 进行离子交换脱除 CTAB，80 °C 加热回流 6 h

difficult.......