AM-g-CCMC树脂的制备及其吸附性能

Preparation and Adsorptive Capacity of AM-g-CCMC

以交联羧甲基纤维素(CCMC)、丙烯酰胺(AM)为原料,过硫酸钾为引发剂,N,N'–亚甲基双丙烯酰胺为交联剂,通过微波辐射法制备了吸水性树脂丙烯酰胺接枝交联羧甲基纤维素(AM–g–CCMC)。研究了溶液p H值、盐溶液浓度对AM–g–CCMC树脂吸水倍率的影响;同时考察了染料p H值、吸附时间、染料浓度、吸附剂浓度对树脂吸附量[对碱性品红(BF)和亚甲基蓝(MB)]的影响。结果表明,AM–g–CCMC对去离子水和浓度为0.154 mol/L的Na Cl,Ca Cl2,Fe Cl3溶液的最大吸水倍率分别为1 735,165,82,43 g/g;在20℃,浓度0.25 g/L条件下,AM–g–CCMC对BF和MB的最大吸附量分别为370 mg/g和323.4 mg/g。同时对该树脂的循环利用性能进行了初步研究。结果表明,吸附MB的AM–g–CCMC的再生效果略好于吸附BF的树脂。

Water absorbent resin acrylamide grafted and crosslinked carboxymethyl cellulose (AM-g-CCMC) was prepared by aqueous solution polymerization through microwave radiation method using crosslinked carboxymethyl cellulose (CCMC) and acrylamide (AM) as raw materials,potassium sulfate as initiator,N,N'–methylene bisacrylamide as crosslinking agent. The effects of pH,salt solution concentration on the water absorption and the effects of adsorption time,dye concentration,and the ratio of solid-to-liquid on the adsorption capacity of the resin for fuchsin (BF) and methylene blue (MB) were studied. The results show that the maximum absorption rates of the resins are 1 735,165,82,43 g/g in distilled water,NaCl,CaCl2 and FeCl3 solution with the same concentration of 0.154 mol/L,respectively. At concentration of 0.25 g/L,the saturated adsorption capacities of resin to BF and MB are 370 mg/g and 323.4 mg/g,respectively at 20℃ . At the same time,the recycling performance of the water absorbent resin was studied. The results show that the regeneration effect of AM-g-CCMC absorbed by MB is slightly better than that of resin absorbed by BF.