College of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450052, PR China.
College of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450052, PR China.
Int J Biol Macromol. 2017 Oct;103:254-260. doi: 10.1016/j.ijbiomac.2017.05.072. Epub 2017 May 17.
Tannin-immobilized cellulose (CT) hydrogels were successfully fabricated by homogeneous immobilization and crosslinking reaction via a simple method. The structures and properties of hydrogels were characterized by SEM and mechanical test. Methlyene Blue (MB) was selected as a cationic dye model, and the adsorption ability of CT hydrogel was evaluated. Tannins immobilized acted as adsorbent sites which combined MB by electrostatic attraction, resulting in the attractive adsorption ability of CT hydrogel. Adsorption kinetics could be better described by the pseudo-second-order model, and the absorption behaviors were in agreement with a Langmuir isotherm. The adsorption-desorption cycle of CT hydrogel was repeated six times without significant loss of adsorption capacity. In this work, both tannin immobilization and hydrogel formation were achieved simultaneously by a facile homogeneous reaction, providing a new pathway to fabricate tannin-immobilized materials for water treatment.
单宁固定化纤维素（CT）水凝胶通过简单的方法通过均相固定化和交联反应成功制备。通过 SEM 和力学测试对水凝胶的结构和性能进行了表征。选择亚甲蓝（MB）作为阳离子染料模型，评估 CT 水凝胶的吸附能力。固定化单宁充当吸附剂位点，通过静电吸引结合 MB，从而赋予 CT 水凝胶具有吸引力的吸附能力。吸附动力学可以更好地用伪二阶模型来描述，并且吸收行为与 Langmuir 等温线一致。CT 水凝胶的吸附-解吸循环重复了六次，而吸附容量没有明显损失。在这项工作中，单宁的固定化和水凝胶的形成都是通过简便的均相反应同时实现的，为用于水处理的单宁固定化材料的制备提供了新途径。
