紧实型GO/PVDF复合膜对有机染料的去除性能研究

doi:10.11949/0438-1157.20181479

化工学报 ›› 2019, Vol. 70 ›› Issue (6): 2361-2369.DOI: 10.11949/0438-1157.20181479

• 材料化学工程与纳米技术 • 上一篇下一篇

紧实型GO/PVDF复合膜对有机染料的去除性能研究

朱振亚^1,²(),白成玲¹,王磊¹(),孟晓荣¹

1. 西安建筑科技大学环境与市政工程学院，陕西省膜分离技术研究院，陕西省膜分离重点实验室，陕西省环境工程重点实验室，陕西西安 710055
2. 河北地质大学水资源与环境学院，河北省水资源可持续利用与开发重点实验室，河北省水资源可持续利用与产业结构优化协同创新中心，河北石家庄 050031

收稿日期:2018-12-14 修回日期:2019-03-19 出版日期:2019-06-05 发布日期:2019-06-05
通讯作者: 王磊
作者简介:<named-content content-type="corresp-name">朱振亚</named-content>（1982—），女，博士，讲师，<email>dgjj1982@163.com</email>
基金资助:
陕西省重点科技创新团队计划项目(2017KCT-19-01);陕西省重点产业链（群）项目(2017ZDCXL-GY-07-03);西安市科技计划项目（201805033YD11CG17(3）);陕西省技术创新引导专项项目(2018HJCG-18);陕西省的自然科学基础研究计划课题项目(2017JM5110)

Study on removal characteristics of organic dyes by tight GO/PVDF composite membranes

Zhenya ZHU^1,²(),Chengling BAI¹,Lei WANG¹(),Xiaorong MENG¹

1. Research Institute of Membrane Separation Technology of Shaanxi Province, Key Laboratory of Membrane Separation of Shaanxi Province, Shaanxi Key Laboratory of Environment Engineering, School of Environmental and Municipal Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, Shaanxi, China
2. Province Key Laboratory of Sustained Utilization and Development of Water Resources, Hebei Province Collaborative Innovation Center for Sustainable Utilization of Water Resources and Optimization of Industrial Structure, School of Water Resources and Environment, Hebei GEO University, Shijiazhuang 050031, Hebei, China

Received:2018-12-14 Revised:2019-03-19 Online:2019-06-05 Published:2019-06-05
Contact: Lei WANG

摘要/Abstract

摘要：

采用氧化石墨烯(GO)改性PVDF膜，利用浸没沉淀相转化的方法制备了紧实型GO/PVDF复合膜，对膜的亲水性、纯水通量和表面Zeta电位等性能进行了考察，并选择罗丹明B和甲基橙分别代表正负电荷染料，对膜的吸附、脱附和截留性能进行了考察。结果显示，膜的纯水通量从45.10 L/(m²·h)增加到58.40 L/(m²·h)。GO含量为0.50%(质量)时(M2)，膜的综合性能较优。GO/PVDF复合膜对罗丹明B的吸附效果较好，1.5 d之后，M0~M3的吸附量分别为1.02、1.24、1.79和1.49 mg/g。乙醇对罗丹明B的脱色率达到80%以上。膜对甲基橙的吸附效果较差，M2的吸附量仅为0.46 mg/g，0.10 mol/L HCl溶液对甲基橙脱色率达到86%以上。膜对两种染料的截留率均保持在57.60%和57.20%以上。为纳米材料改性有机膜的制备以及对有机染料的去除提供了一定的科学依据。

关键词: 聚偏氟乙烯, 氧化石墨烯, 膜, 染料, 去除

Abstract:

The PVDF membrane was modified by graphene oxide (GO), and the compacted GO/PVDF composite membrane was prepared by immersion precipitation phase transformation. The hydrophilicity, pure water flux and surface zeta potential of the membrane were investigated. Rhodamine B and methyl orange were selected as positive and negative charge dyes to investigate the adsorption, desorption and retention properties of membranes. The results showed that the pure water flux of membrane increased from 45.10 L/(m²·h) to 58.40 L/(m²·h). When the content of GO was 0.50%(mass) (M2), the comprehensive performance of membrane was better. GO/PVDF composite membranes had a good adsorption effect on Rhodamine B. After 1.5 d, the adsorption capacity of M0—M3 were 1.02, 1.24, 1.79 and 1.49 mg/g respectively. The decolorization rate of Rhodamine B by ethanol was over 80%. The adsorption capacity of M2 was only 0.46 mg/g, and decolorization rate of methyl orange by 0.10 mol/L HCl solution was over 86%. The retention rates of two dyes remained above 57.60% and 57.20%. This study provided a scientific basis for the preparation of nano-materials modified membranes and their characteristics of organic dye removal.

Key words: PVDF, GO, membrane, dye, remove

中图分类号:

TQ 028.8

朱振亚, 白成玲, 王磊, 孟晓荣. 紧实型GO/PVDF复合膜对有机染料的去除性能研究[J]. 化工学报, 2019, 70(6): 2361-2369.

Zhenya ZHU, Chengling BAI, Lei WANG, Xiaorong MENG. Study on removal characteristics of organic dyes by tight GO/PVDF composite membranes[J]. CIESC Journal, 2019, 70(6): 2361-2369.

图/表 12

图1 GO/PVDF复合膜制备流程

Fig.1 Schematic diagram for preparation of GO/PVDF composite membranes

表1 GO/PVDF复合膜配方

Table 1 Solution composition of GO/PVDF composite membrane cast

膜样品	组分含量/%(质量)
膜样品	GO	PVDF	DMAc
M0	0	15	85
M1	0.1	15	84.9
M2	0.5	15	84.5
M3	0.9	15	84.1

图2 GO的TEM图

Fig.2 TEM image of GO nanosheets

图3 GO/PVDF复合膜的ATR-FTIR谱图

Fig.3 ATR-FTIR spectra of GO/PVDF composite membrane

图4 PVDF的α和β构型及晶格细胞

Fig.4 Conformations and crystal cells of PVDF with α and β phases

图5 GO/PVDF复合膜的XRD谱图

Fig.5 XRD patterns of GO/PVDF composite membrane

图6 GO/PVDF复合膜断面的SEM图

Fig.6 SEM images of cross-section of GO/PVDF composite membranes

图7 GO/PVDF复合膜表面的AFM图

Fig.7 AFM images of GO/PVDF composite membranes

表2 GO/PVDF复合膜的性能参数

Table 2 Performance parameters of GO/PVDF composite membranes

膜样品	纯水通量/(L/(m²·h))	孔隙率/%	平均孔径/nm	接触角/(°)	\|ΔG _S\|/(J/m²)	表面Zeta电位/mV
M0	45.1(±0.3)	48.3	4.5	76.44	89.87	?12.14
M1	50.8(±0.2)	50.6	5.5	71.38	96.04	?14.23
M2	58.4(±0.4)	54.6	6.2	68.92	98.98	?20.15
M3	52.5(±0.3)	49.8	5.2	70.19	97.47	?16.26

图8 吸附之后残留的染料浓度

Fig.8 Concentration of residual dye solution after adsorption

图9 GO/PVDF复合膜对染料的截留率

Fig.9 Dye rejection of GO/PVDF composite membranes

图10 GO/PVDF复合膜对染料的渗透通量

Fig.10 Dye permeation flux of GO/PVDF composite membranes

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紧实型GO/PVDF复合膜对有机染料的去除性能研究

Study on removal characteristics of organic dyes by tight GO/PVDF composite membranes

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