原位聚合包覆SiO2纳米纤维棉的制备及重金属吸附性能

硅酸盐通报 ›› 2023, Vol. 42 ›› Issue (11): 4082-4091.

所属专题：资源综合利用

原位聚合包覆SiO₂纳米纤维棉的制备及重金属吸附性能

郭勤¹, 张凯钧², 陈自娇¹, 苗瑾超¹, 李雪梅¹, 马信¹, 肖宇航¹

1.新疆理工学院能源化工工程学院,阿克苏 843000;
2.湖南现代环境科技股份有限公司,长沙 410114

收稿日期:2023-05-24 修订日期:2023-08-15 出版日期:2023-11-15 发布日期:2023-11-22
通信作者: 陈自娇,副教授。E-mail:94714986@qq.com
作者简介:郭勤(1989—),男,副教授。主要从事无机纳米纤维膜制备及应用的研究。E-mail:2015090@xjit.edu.cn
基金资助:
新疆维吾尔族自治区自然科学计划(自然科学基金)青年基金(2021D01B40);新疆维吾尔自治区天山创新团队计划(2021D14013)

Preparation and Heavy Metal Adsorption Properties of SiO₂ Nanofiber Cotton By in situ Polymerization Coating

GUO Qin¹, ZHANG Kaijun², CHEN Zijiao¹, MIAO Jinchao¹, LI Xuemei¹, MA Xin¹, XIAO Yuhang¹

1. School of Energy and Chemical Engineering, Xinjiang Institute of Technology, Aksu 843000, China;
2. Hunan Modern Environment Technology Co., Ltd., Changsha 410114, China

Received:2023-05-24 Revised:2023-08-15 Online:2023-11-15 Published:2023-11-22

摘要/Abstract

摘要： 近年来,重金属离子的去除是复杂环境中水处理面临的难点问题之一,静电纺丝制备的三维SiO₂纳米纤维棉具有耐高温、耐强酸的特点,是复杂环境中水处理的理想前驱体材料。以三维SiO₂纳米纤维棉作为基底,在引发剂偶氮二异丁腈作用下催化乙烯苯磺酸和乙二苯单体发生原位聚合,实现聚乙烯苯磺酸在SiO₂纳米纤维棉表面均质包覆,制备SiO₂@聚乙烯苯磺酸纳米纤维棉。通过SEM、FT-IR等表征方法揭示了该纳米纤维棉的形貌和化学组成,采用热重分析仪对其进行热稳定性测试,并研究了该纳米纤维棉在高温、酸性条件下的吸附再生性能。结果表明:SiO₂@聚乙烯苯磺酸纳米纤维棉对Cu²⁺、Cd²⁺和Pb²⁺有很高的吸附容量,当pH值为5.5和初始离子浓度为100 mg/L时,吸附容量分别为73.0、91.0、161.0 mg/g,当温度为80 ℃时吸附容量仍可达81.0、64.0、123.0 mg/g;吸附过程符合准二级动力学和Langmuir等温吸附,具有较强的再生性能,经10次离子脱附-吸附循环,Cu²⁺、Cd²⁺和Pb²⁺的容量保持率分别为83.5%、81.1%、77.6%。

关键词: 原位聚合包覆, SiO₂纳米纤维棉, 静电纺丝, 水处理, 重金属, 吸附

Abstract: In recent years, the removal of heavy metal ions is one of the difficult problems faced by water treatment under complex environments. Characterized by high-temperature resistance and strong acid resistance, three-dimensional SiO₂ prepared by electrospinning is an ideal precursor material for water treatment in complex environments. SiO₂@PEBS nanofiber cotton was prepared by in situ polymerization of ethylene benzenesulfonic acid and diethylbenzene monomer catalyzed by initiator azobisisobutyronitrile on three-dimersional SiO₂ nanofiber cotton as the substrate, realizing the uniform coating of polyvinylbenzene sulfonate acid on the surface of SiO₂ nanofiber cotton. The morphology and chemical composition of SiO₂@PEBS nanofiber cotton were revealed using SEM and FT-IR, and the thermal stability of the sample was tested with a thermogravimetric analyzer. The adsorption regeneration performance of nanofiber fiber wool under high temperature and acidic conditions was investigated. The results show that SiO₂@PEBS nanofiber cotton has high adsorption capacity on Cu²⁺, Cd²⁺ and Pb²⁺. Under pH value of 5.5 and initial ion concentration of 100 mg/L, the adsorption capacity of Cu²⁺, Cd²⁺ and Pb²⁺ is 73.0, 91.0 and 161.0 mg/g, respectively. At 80 ℃, the adsorption capacity still reaches 81.0, 64.0 and 123.0 mg/g, respectively. The adsorption process conforms to pseudo second-order kinetics and Langmuir isothermal adsorption, with high regeneration performance. After 10 times ion adsorption and desorption cycles, the capacity retention rates for Cu²⁺, Cd²⁺ and Pb²⁺ are 83.5%, 81.1% and 77.6%, respectively.

Key words: in situ polymerization coating, SiO₂ nanofiber cotton, electrospinning, water treatment, heavy metal, adsorption

中图分类号:

O613.7

郭勤, 张凯钧, 陈自娇, 苗瑾超, 李雪梅, 马信, 肖宇航. 原位聚合包覆SiO₂纳米纤维棉的制备及重金属吸附性能[J]. 硅酸盐通报, 2023, 42(11): 4082-4091.

GUO Qin, ZHANG Kaijun, CHEN Zijiao, MIAO Jinchao, LI Xuemei, MA Xin, XIAO Yuhang. Preparation and Heavy Metal Adsorption Properties of SiO₂ Nanofiber Cotton By in situ Polymerization Coating[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(11): 4082-4091.

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原位聚合包覆SiO₂纳米纤维棉的制备及重金属吸附性能

Preparation and Heavy Metal Adsorption Properties of SiO₂ Nanofiber Cotton By in situ Polymerization Coating

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