新型交联壳聚糖接枝聚（N-乙烯基-2-吡咯烷酮）用于从水溶液中去除 Cu(II)离子。
New crosslinked-chitosan graft poly(N-vinyl-2-pyrrolidone) for the removal of Cu(II) ions from aqueous solutions.
机构信息
Department of Chemistry, Faculty of Science, Universiti Teknologi Malaysia, 81310 UTM, Johor Bahru, Johor, Malaysia.
Department of Chemistry, Faculty of Science, Universiti Teknologi Malaysia, 81310 UTM, Johor Bahru, Johor, Malaysia; Centre for Sustainable Nanomaterials, IbnuSina Institute for Scientific and Industrial Research, UniversitiTeknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia.
出版信息
Int J Biol Macromol. 2018 Feb;107(Pt A):891-897. doi: 10.1016/j.ijbiomac.2017.09.061. Epub 2017 Sep 19.
Crosslinked chitosan beads were grafted with N-vinyl-2-pyrrolidone (NVP) using ammonium persulfate (APS) as free radical initiator. Important variables on graft copolymerization such as temperature, reaction time, concentration of initiator and concentration of monomer were optimized. The results revealed optimum conditions for maximum grafting of NVP on 1g crosslinked chitosan as follows: reaction temperature, 60°C; reaction time, 2h and concentrations of APS and NVP of 2.63×10M and 26.99×10M, respectively. The modified chitosan beads were characterized by FTIR spectroscopy, C NMR, SEM and BET to provide evidence of successful crosslinking and grafting reactions. The resulting material (cts(x)-g-PNVP) was evaluated as adsorbent for the removal of Cu(II) ions from aqueous solutions in a batch experiment. The Langmuir and Freundlich adsorption models were also applied to describe the equilibrium isotherms. The results showed that the adsorption of the copper ions onto the beads agreed well with Langmuir model with the maximum capacity (q) of 122mgg.
采用过硫酸铵（APS）作为自由基引发剂，将交联壳聚糖珠粒接枝上 N-乙烯基-2-吡咯烷酮（NVP）。优化了接枝共聚过程中的重要变量，如温度、反应时间、引发剂浓度和单体浓度。结果揭示了在 1g 交联壳聚糖上接枝 NVP 的最佳条件如下：反应温度为 60°C；反应时间为 2h；APS 和 NVP 的浓度分别为 2.63×10^-2 M 和 26.99×10^-2 M。通过傅里叶变换红外光谱（FTIR）、C 核磁共振（C NMR）、扫描电子显微镜（SEM）和 BET 对改性壳聚糖珠进行了表征，为交联和接枝反应的成功提供了证据。将所得材料（cts(x)-g-PNVP）作为吸附剂，在批实验中用于从水溶液中去除 Cu(II)离子。还应用了 Langmuir 和 Freundlich 吸附模型来描述平衡等温线。结果表明，铜离子在珠粒上的吸附与 Langmuir 模型吻合良好，最大容量（q）为 122mgg。
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