摘要
通过纤维素多乙烯多胺衍生物2a^2c与1,3-二环氧丙基杯[4]芳烃3反应,合成了螯合树脂杯芳烃接枝纤维素4a^4c,用红外、元素分析和SEM等对其结构和形貌进行了表征.通过含氮量推算出新螯合树脂4a^4c中每个纤维素单元的杯芳烃接枝取代度分别为0.75、0.82和0.87.金属阳离子吸附性能实验表明,杯芳烃单元的引入在吸附过程中有重要作用,该螯合树脂结合了杯芳烃和纤维素的各自吸附性能优势,不仅吸附容量较高,而且表现出高的选择性吸附能力.树脂4b和4c对Ni2+离子表现出很高的吸附选择性,4a^4c的Ni2+饱和吸附容量分别达到2.96 mmol/g、2.93 mmol/g和2.66 mmol/g.在pH<4的强酸性条件下树脂的吸附能力迅速下降.该树脂用10%的氨水解吸附后有较好的重复使用性.
A series of novel cellulose resins grafted with calix [4 ] arene 4a - 4c were obtained by reactions of cellulose poly（ethyleneimine） derivatives 2a - 2c with 1,3-bis-epoxypropyl Calix [4 ] arene 3. The structure and appearance of the chelating resins were characterized by IR, element analyses and SEM images. The degree of substitution of calixarene in 4a - 4c was 0.75,0.82 and 0.87, respectively. The adsorption experiments of 4a - 4c towards a series of cations showed that the calixarene units played an important role in adsorption. These resins combined the adsorption advantages of cellulose derivatives and calixarene polymers, exhibited not only high adsorption capacities, but also high adsorption selectivity. Chelating resins 4b and 4c showed very high adsorption selectivity towards Ni^2＋. The saturated adsorption capabilities of 4a - 4c were as high as 2.96, 2.93 and 2.66 mmol/g, respectively. The adsorption capacities of 4a - 4c decreased remarkably when pH 〈 4, and they can be reused by desorption with aqueous solutions of 10% ammonium hydroxide.
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
2005年第6期896-901,共6页
Acta Polymerica Sinica
基金
国家自然科学基金(基金号20402002)
福建省自然科学重点基金(基金号E0220002)
福建省青年科技人才创新资金(基金号2001J025)资助项目
