Page 98 - 《精细化工》2021年第3期

第 38 卷第 3 期 精 细 化 工 Vol.38, No.3
202 1 年 3 月 FINE CHEMICALS Mar. 2021

功能材料
基于微生物和纳米 TiO 的双负载核壳
2

水凝胶的制备及性能

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宋 鸽 ，张 敏 ，宋 洁 ，KANWAL Aqsa ，李成涛
（1. 陕西科技大学 环境科学与工程学院，陕西 西安 710021；2. 陕西科技大学 教育部轻化工助剂化学
与技术重点实验室，陕西 西安 710021）
摘要：设计了能同时利用微生物和光催化剂，分步逐级降解亚甲基蓝（MB）的多功能双负载核壳水凝胶，核为
聚乙烯醇和羟乙基纤维素包覆酵母菌，壳为海藻酸钠和钙离子负载纳米 TiO 2 。SEM 结果表明，核壳结构清晰可
辨；显微镜照片和荧光标记照片证明了核中酵母菌的存在；XRD 结果证明了壳中纳米 TiO 2 的负载；FTIR、XPS
结果证实了核壳结构的分子间存在着相互作用力。考察了在 TiO 2 和酵母菌不同用量下制备的水凝胶对 MB 的分
步降解效果，壳中纳米 TiO 2 用量越高，水凝胶对 MB 的降解率越大，最高可达 96.65%；而随着酵母菌用量的
增加，水凝胶对 MB 的降解率先增大后减小。在使用 4 次后，水凝胶对 MB 的降解率仍有 68.97%。
关键词：双负载水凝胶；核壳结构；逐级分步降解；多功能性；功能材料
中图分类号：X505;TQ427.2 文献标识码：A 文章编号：1003-5214 (2021) 03-0518-08

Preparation and properties of a core-shell hydrogel

loaded with yeast and TiO 2 nanoparticles

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SONG Ge , ZHANG Min , SONG Jie , KANWAL Aqsa , LI Chengtao
（1. College of Environmental Science and Engineering, Shaanxi University of Science & Technology, Xi'an 710021,
Shaanxi, China; 2. Key Laboratory of Auxiliary Chemistry and Technology for Light Chemicals, Ministry of Education,
Shaanxi University of Science & Technology, Xi'an 710021, Shaanxi, China）
Abstract: A multifunctional double-loaded core-shell hydrogel was designed using microorganism and
photocatalyst simultaneously for the stepwise degradation of methylene blue (MB). The hydrogel core was
composed of polyvinyl alcohol and hydroxyethylcellulose coated with yeast and the shell consisted of
sodium alginate and calcium ions loaded with titanium dioxide nanoparticles. SEM results revealed that the
core-shell structure was clear and distinct, while the micrographs and fluorescent labeling photos proved the
existence of yeast in the core. The successful loading of TiO 2 nanoparticles in the shell was confirmed by
XRD. FTIR and XPS results verified the presence of intermolecular interactions in the core-shell structure.
The effects of core-shell hydrogels with different TiO 2 dosage and yeast dosage on the degradation effect of
MB were investigated. When TiO 2 nanoparticles dosage in the shell increased, the degradation rate of MB
by the hydrogel was increased, the highest degradation rate of MB was up to 96.65%. With the increase of
yeast dosage, the MB degradation rate first increased and then decreased. After used for 4 times of
degradation, the degradation rate of MB by the hydrogel was still 68.97%.
Key words: double-loaded hydrogels; core-shell structure; stepwise degradation; multifunction; functional
materials

收稿日期：2020-11-18; 定用日期：2021-01-18; DOI: 10.13550/j.jxhg.20201069
基金项目：国家自然科学基金（51803114）
作者简介：宋 鸽（1997—），女，硕士生，E-mail: songge0108@163.com。联系人：张 敏（1958—），女，教授，E-mail:
yanjiushi206@163.com。