一种新型纤维素吸附剂的制备研究

Preparation of a Novel Cellulose Adsorbent

采用蔗渣纤维素、丙烯酸(AA)、丙烯酰胺(AM)、甲基丙烯酰氧乙基三甲基氯化铵(MAETAC)为原料,通过接枝共聚反应制备出一种新型纤维素吸附剂,对制备该吸附剂的影响因子如碱化时间、碱质量分数、单体的用量、引发剂(NaHSO3、(NH4)2S2O8)用量、温度和时间等条件进行了分析研究。该纤维素吸附剂的最佳合成工艺为:碱化时间90min,NaOH质量分数30%,AA中和度60%,相对于吸附剂整体,纤维素质量占20%,单体AA占47.3%,AM占26.3%,MAETAC占6.4%,引发剂占2.6%(相对于单体用量),反应温度70℃,反应时间3h。该工艺条件下所得吸附剂对Cu2+的吸附量达25.1mg/g。

A novel cellulose adsorbent was made from bagasse cellulose, acrylic acid （AA） , acrylamide （AM） , and [ 2-（ methyl- acryloyloxy） ethyl] trimethylammonium chloride （MAETAC） through graft copolymerization. Factors affecting the adsorption capacity of the product, such as NaOH mass fraction, alkalification time, AA dosage, neutralization degree of AA and AM dosage, were discussed in detail. The optimal conditions were found to be as follows： NaOH mass fraction 30 % , alkalification time 90 min, cellulose dosage 20 %, neutralization degree of AA 60 %, AA dosage 47.3 %, AM dosage 26.3 %, MAETAC dosage 6.4 % , initiator dosage 2.6 % , reaction temperature 70 ℃, reaction time 3 h. Cu^2＋ adsorption of the adsorbent made under the optimized synthesis condition was 25.1 mg/g.