化工学报 ›› 2020, Vol. 71 ›› Issue (S1): 252-260.DOI: 10.11949/0438-1157.20191063

• 分离工程 • 上一篇    下一篇

电纺zein-SLS纤维膜的制备及其离子吸附性能研究

武君媛(),霍伟智,李志强,曾嘉恒,江燕斌()   

  1. 华南理工大学化学与化工学院,广东 广州 510641
  • 收稿日期:2019-09-23 修回日期:2019-12-17 出版日期:2020-04-25 发布日期:2020-04-25
  • 通讯作者: 江燕斌
  • 作者简介:武君媛(1998—),女,本科,201630365082@mail.scut.edu.cn
  • 基金资助:
    国家自然科学基金项目(21776102);华南理工大学SRP项目(X201910561238)

Preparation of coaxial electrospun zein nanofiber film embedding sodium lignosulfonate for enhanced adsorption of heavy metal ions

Junyuan WU(),Weizhi HUO,Zhiqiang LI,Jiaheng ZENG,Yanbin JIANG()   

  1. School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, Guangdong, China
  • Received:2019-09-23 Revised:2019-12-17 Online:2020-04-25 Published:2020-04-25
  • Contact: Yanbin JIANG

摘要:

选用玉米醇溶蛋白(zein)作为鞘层包裹材料、木质素磺酸钠(SLS)作为芯层强化材料,采用同轴电纺技术制备了可有效吸附重金属离子的zein-SLS纤维膜。优化了膜制备工艺条件,确定纺丝电压适宜为14 kV,芯鞘层进料速率比适宜为1∶1。TEM证实,SLS被成功包埋于zein纤维膜中,但其负载量、包埋率和流失率受溶液pH的影响。离子吸附测试结果表明,SLS的加入可强化zein纤维膜对三种金属离子Ni2+、Zn2+、Cd2+的吸附效果,其中对Zn2+吸附能力的强化效果最为显著,上述吸附过程符合准二级吸附动力学模型。同时,在酸性条件下,随着pH的上升,zein纤维膜对Ni2+、Zn2+、Cd2+的吸附能力逐渐提高。

关键词: 同轴电纺, 玉米醇溶蛋白, 木质素磺酸钠, 膜, 制备, 重金属离子, 吸附

Abstract:

In order to fabricate nanofiber film with enhanced adsorption capacity for heavy metal ions, the coaxial electrospinning was utilized to embed sodium lignosulfonate (SLS) in electrospun zein fibers. The process parameters were optimized, i.e. the electrospinning voltage is 14 kV and the core-to-sheath flow rate ratio is 1∶1. The TEM results indicated that SLS was embedded in electrospun zein films successfully. However, its loading capacity, encapsulation efficiency and loss ratio were influenced by the pH of solution. The results of metal ion adsorption tests indicated that SLS enhanced adsorption capacity of Ni2+, Zn2+ and Cd2+, among which Zn2+ is the most significant. The pseudo-second-order model was more suitable to describe the adsorption. Furthermore, the adsorption capacity of these three metal ions increased with increasing pH of the solution under acidic conditions.

Key words: coaxial electrospinning, zein, sodium lignosulfonate, film, preparation, heavy metal ions, adsorption

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