Nanjing University of Technology, People's Republic of China.
Appl Biochem Biotechnol. 2010 Jan;160(2):593-603. doi: 10.1007/s12010-008-8441-7. Epub 2008 Dec 3.
For desulfurization of gasoline, novel chitosan-based molecularly imprinted polymer (MIP) was prepared by cross-linking chitosan with epichlorohydrin in the presence of dibenzothiophene (DBT) as the template. The influence of cross-linking ratio on the specific adsorption was evaluated. The effects of the types and the amounts of porogen on selectivity of the chitosan MIP were also examined. Results showed that MIP has a higher recognition property to DBT. The maximum rebinding capacities of the MIP reached 22.69 mg g(-1) in the model solution. The adsorption behaviors of the MIP including adsorption kinetics, isotherms, and thermodynamic parameters were investigated and the experimental data agreed well with the Langmuir model. The dynamical adsorption behaved in first-order kinetics. Negative values for the Gibbs free energy showed that the adsorptions were spontaneous processes. The MIP was further used to selectively adsorb organosulfur from gasoline.
用于汽油脱硫，在二苯并噻吩（DBT）作为模板的存在下，用环氧氯丙烷交联壳聚糖制备了新型壳聚糖基分子印迹聚合物（MIP）。评价了交联比对特异性吸附的影响。还考察了致孔剂的类型和用量对壳聚糖 MIP 选择性的影响。结果表明，MIP 对 DBT 具有更高的识别性能。在模型溶液中，MIP 的最大结合容量达到 22.69mg/g。研究了 MIP 的吸附行为，包括吸附动力学、等温线和热力学参数，实验数据与朗缪尔模型吻合较好。动力学吸附行为符合一级动力学。吉布斯自由能的负值表明吸附是自发过程。MIP 进一步用于从汽油中选择性吸附有机硫。
