Page 160 - 精细化工2020年第2期

第 37 卷第 2 期 精 细 化 工 Vol.37, No.2
202 0 年 2 月 FINE CHEMICALS Feb. 2020

水处理技术与环境保护
复合材料 POSS/TX-10/Bent 的制备及其吸附性能

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门孝平 ，孟 波 ，郭巧霞 ，任申勇 ，申宝剑
〔1. 中国石油大学（北京）理学院，北京 102249；2. 中国石油大学（北京）重质油国家重点实验室，北
京 102249〕
摘要：以多面齐聚倍半硅氧烷（POSS）、TX-10 型非离子表面活性剂为改性剂对膨润土（Bent）进行复合改性
制备了复合材料（POSS/TX-10/Bent），并利用亚甲基蓝研究了其吸附性能。采用 XRD、XPS、EA、FTIR、SEM
对 POSS/TX-10/Bent 进行了组成与结构表征。结果表明，POSS 和 TX-10 型非离子表面活性剂都成功插入到膨
润土层间，使得复合材料层间距增大，疏水性增强。吸附实验表明，在 30 ℃、pH 为 6.52（原始值）的条件下，
复合材料投加量 5 g/L、吸附 180 min 时效果最佳。在同等吸附条件下，复合改性膨润土对亚甲基蓝的吸附能力
远大于未改性的膨润土。吸附过程更符合准二级动力学模型，平衡吸附数据与 Langmuir 等温吸附曲线吻合较好，
吸附是一个自发的吸热过程，POSS/TX-10/Bent 对亚甲基蓝的理论最大吸附量为 253.81 mg/g。
关键词：多面齐聚倍半硅氧烷；膨润土；复合材料；吸附；亚甲基蓝；水处理技术
中图分类号：TB332; O647.3 文献标识码：A 文章编号：1003-5214 (2020) 02-0362-08

Preparation and adsorption properties of composites POSS/TX-10/Bent

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Men Xiaoping , Meng Bo , Guo Qiaoxia , Ren Shenyong , Shen Baojian
〔1. College of Science, China University of Petroleum (Beijing), Beijing 102249, China; 2. State Key Laboratory of
Heavy Oil, China University of Petroleum (Beijing), Beijing 102249, China〕
Abstract: Novel composites (POSS/TX-10/Bent) were prepared by composite modification of bentonite
with polyhedral oligomeric silsesquioxane (POSS) and TX-10 nonionic surfactant as modifiers. The
adsorption property of POSS/TX-10/Bent for methylene blue was also investigated. The samples were
characterized by XRD, XPS, EA, FTIR, SEM. The results showed that POSS and TX-10 nonionic
surfactant were successfully inserted into the interlayers of bentonite, which increased the spacing between
interlayers of the composites and enhanced their hydrophobicity. The results showed that under the
optimum conditions of 30 ℃, pH=6.52 (initial value), dosage of POSS/TX-10/Bent 5 g/L and adsorption
time 180 min, POSS/TX-10/Bent exhibited the best adsorption property for methylene blue. Under the same
adsorption conditions, the adsorption capacity of POSS/TX-10/Bent for methylene blue was much higher
than that of unmodified bentonite. The adsorption process of POSS/TX-10/Bent for methylene blue was
more in accordance with the pseudo-second-order kinetic model and the adsorption isotherm could be
described by Langmuir equation. The adsorption was a spontaneous endothermic process. The theoretical
maximum adsorption capacity of POSS/TX-10/Bent for methylene blue was 253.81 mg/g.
Key words: polyhedral oligomeric silsesquioxane; bentonite; composite materials; adsorption; methylene
blue; water treatment technology

膨润土是一种以蒙脱石为主要成分的层状硅铝 距较小、亲水性很强，难以有效吸附废水中的有机
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酸盐，由于具有较大的比表面积、阳离子交换性， 污染物 ，因而需要对其进行改性，提高应用价值。
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且来源广泛，使得膨润土作为吸附剂时展现出吸附 目前，常用的改性方法有无机改性 [3-4] 、有机改性 、
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能力强、经济高效的特点 ，但天然膨润土的层间 复合改性 [6-7] 等，由于复合改性的膨润土可以同时具

收稿日期：2019-07-02; 定用日期：2019-09-04; DOI: 10.13550/j.jxhg.20190627
基金项目：国家自然科学基金（U1462202）
作者简介：门孝平（1994—），男，硕士生，E-mail：1203150946@qq.com。联系人：郭巧霞（1964—），女，副教授，E-mail：
qxguo@cup.edu.cn。