摘要
以纤维素纳米纤维(CNF)及海藻酸钠(SA)为原材料制备SA/CNF复合微球,采用傅里叶变换红外光谱(FTIR)和扫描电子显微镜(SEM)对微球的化学结构、物理形貌进行表征,并研究了其对亚甲基蓝(MB)染料吸附性能。SEM显示,SA/CNF复合微球表面有大量褶皱,比表面积较大,吸附活性位点多;FTIR分析表明,SA与CNF通过氢键连接,CNF的引入提供了丰富的羟基官能团;微球对MB染料分子的吸附过程符合拟二级吸附动力学模型及Langmuir吸附等温线模型,计算可得微球最大理论吸附值为775.19mg/g;SA/CNF复合微球在pH为6.83时,吸附值最大。
Cellulose nanofibers (CNF) and sodium alginate (SA) were used as raw materials to prepare SA/CNF composite microspheres.The chemical structure and physical morphology of SA/CNF composite microspheres were characterized by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM),and the adsorption properties of the SA/CNF composite microspheres for methylene blue (MB) were studied.SEM showed that SA/CNF composite microspheres had a large number of folds on the surface,large specific surface area,and many adsorption active sites.FTIR showed that SA and CNF were connected by hydrogen bond,and the introduction of CNF provided abundant hydroxyl functional groups.The adsorption process accords with pseudo-second-order adsorption kinetics model and Langmuir adsorption isotherm model,and the theoretical maximum value is 775.19 mg/g.The adsorption value of SA/CNF composite microspheres reached the maximum at pH 6.83.
作者
滕克勇
黄家毅
易泽德
秦志永
Teng Keyong;Huang Jiayi;Yi Zede;Qin Zhiyong(Guangxi Gaolin Forestry Co.,Ltd.,Guangxi,537500;College of Resources,Environment and Materials,Guangxi University,Guangxi,530000)
出处
《当代化工研究》
2022年第17期171-173,共3页
Modern Chemical Research
基金
国家自然科学基金“基于液滴动态演变规律的木材表面润湿机制研究”(31760188)
广西创新驱动发展专项“绿色环保特种木材胶黏剂及助剂的开发与示范”(桂科AA17204087-15)。
关键词
海藻酸钠
纤维素纳米纤维
复合微球
吸附
亚甲基蓝
sodium alginate
carboxylated cellulose nanofibers
composite microspheres
adsorption
methylene blue
