摘要
以棉短绒,甲基丙烯酸缩水甘油酯(glycidyl methacrylate, GMA)为原料,采用自由基共聚合成纤维素聚合物(cellulose-g-GMA),再利用乙二胺(EDA)进行化学修饰,制备了氨基棉短绒纤维素复合材料(cellulose-g-GMA-EDA)。通过红外光谱(FT-IR)、扫描电镜(SEM)、热重分析(TG)、X射线衍射分析(XRD)和元素分析等手段对其结构表征,并进一步研究了产物对二甲酚橙染料的去除率和吸附量。实验结果表明:棉纤维素分子中引入了氨基,成功合成了氨基棉短绒纤维素,接枝聚合物Cellulose-g-GMA的环氧值最高达2.79 mmol/g,在m(cellulose-g-GMA)∶m(EDA)=2∶5,反应温度为100℃,反应时间为11 h的条件下,得接枝率为55%的氨基纤维素吸附材料,对二甲酚橙染料去除率达89.7%,吸附动力学符合准二级动力学模型,吸附等温线符合Freundlich模型,最大吸附量为7.2 mg/g。
Amino cotton linters cellulose composite(Cellulose-g-GMA-EDA)was prepared with cotton linters,glycidyl methacrylate(GMA)and ethylenediamine(EDA)by means of free radical graft copolymerization.The structure of the product was characterized by FT-IR,SEM,TG,XRD and elemental analysis.The removal rate and the amount of adsorption were further studied.The experimental result shows that the epoxy value of the graft polymer Cellulose-g-GMA was up to 2.79 mmol/g.At cellulose-g-GMA/EDA=2∶5,when the reaction temperature was 100℃,and the reaction time was 11 h,the aminocellulose adsorption material with grafting ratio of 55%was obtained,which had a removal rate of 89.7%for the xylenol orange dye.The adsorption kinetics accords with the quasi-secondary kinetic model.The adsorption isotherm conformed to the Freundlich model,and the maximum adsorption capacity was 7.2 mg/g.
作者
冯晓宁
丁成立
刘月娥
FENG Xiaoning;DING Chengli;LIU Yuee(School of Chemistry and Chemical Engineering,Xingjiang University,Urumqi 830046,China;Key Laboratory of Coal Clean Conversion&Chemical Engineering Process of Xinjiang Uyghur Autonomous Region,Urumqi 830046,China)
出处
《功能材料》
EI
CAS
CSCD
北大核心
2019年第7期7191-7198,共8页
Journal of Functional Materials
基金
国家自然科学基金资助项目(21666035)
新疆高校科研计划重点研究资助项目(XJEDU20161019)
