纤维素-海藻酸钠-海泡石多孔微球的制备及其对亚甲基蓝吸附性能  

Preparation of cellulose-sodium alginate-sepiolite porous bead and its application in adsorption of methylene blue

作　　者：李婷婷 李瑞雪 马政 杨安廷 焦晨璐 王健[1] Tingting LI;Ruixue LI;Zheng MA;Anting YANG;Chenlu JIAO;Jian WANG(School of Textile Engineering and Academy of Art,Anhui Agricultural University,Hefei 230036,China)

机构地区：[1]安徽农业大学轻纺工程与艺术学院,合肥230036

出　　处：《复合材料学报》2021年第12期4273-4281,共9页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金青年基金(51803004);安徽省高校自然科学研究项目(KJ2017A144);安徽农业大学人才项目(yj2018-18)。

摘　　要：以微晶纤维素(Microcrystalline cellulose,MCC)和海藻酸钠(Sodium alginate,SA)为网络框架,海泡石(Sepiolite,SEP)为功能单元,采用悬浮液滴法构建纤维素-海藻酸钠-海泡石(MCC-SA-SEP)双网络多孔复合微球。通过SEM和TG对复合微球结构和热稳定性能进行表征,并研究该微球对亚甲基蓝(Methylene blue,MB)水溶液的吸附性能。结果表明,MCC-SA-SEP复合微球呈现三维网络多孔结构,且随着SEP含量的增加热稳定性逐渐提高。吸附结果显示MCC-SA-SEP符合准二级动力学模型和Langmuir等温线,对MB的饱和吸附容量高达333.3 mg/g。经过五次再生循环后,对MB吸附能力仍能维持85.4%,表明该多孔复合微球可以作为一种高效可再生的有机-无机复合吸附剂用于染料废水处理。Double network composite beads(MCC-SA-SEP) were synthesized by a floating droplet method, in which microcrystalline cellulose(MCC) and sodium alginate(SA) worked as the network frameworks, and sepiolite(SEP) was a functional component. The microstructure and thermal properties of the as-prepared MCC-SA-SEP beads were characterized by SEM and TG, respectively, and the adsorption performance for methylene blue(MB)aqueous solution was studied. The results present that the MCC-SA-SEP beads have three-dimensional porous structures, and the thermal stability increases gradually with the increasing of SEP contents. The adsorption process of MCC-SA-SEP follows the pseudo-second-order kinetic model and Langmuir isotherm, with the maximum adsorption capacity of 333.3 mg/g for MB. After five regeneration cycles, the adsorption capacity could still retain 85.4% of the initial adsorption amount, demonstrating a novel organic-inorganic hybrid adsorbent for dye waste water treatment.

关 键 词：微晶纤维素 海藻酸钠 海泡石 微球 亚甲基蓝 吸附 

分 类 号：TQ340.1[化学工程—化纤工业]