界面交联制备聚多巴胺复合纳滤膜的性能调控

唐安琪; 路景驭; 冯炜林; 张培斌; 朱利平

doi:10.11777/j.issn1000-3304.2018.18109

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界面交联制备聚多巴胺复合纳滤膜的性能调控

研究论文 | 更新时间：2021-01-26

- 界面交联制备聚多巴胺复合纳滤膜的性能调控
- Performance Control of Polydopamine Compsite Nanofiltration Membranes Fabricated by Interfacial Crosslinking
- 高分子学报 2018年0卷第12期页码：1524-1531
- 作者机构：
  
  高分子合成与功能构造教育部重点实验室浙江大学高分子科学与工程学系　杭州 310027
- 作者简介：
  
  E-mail: lpzhu@zju.edu.cn Li-ping Zhu, E-mail: lpzhu@zju.edu.cn
- 基金信息：
  
  国家自然科学基金(基金号 51773175，51573159)资助项目()
- DOI：10.11777/j.issn1000-3304.2018.18109
  中图分类号：
- 纸质出版日期：2018-12，
  
  收稿日期：2018-4-20，
  
  修回日期：2018-5-22，
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唐安琪, 路景驭, 冯炜林, 张培斌, 朱利平. 界面交联制备聚多巴胺复合纳滤膜的性能调控[J]. 高分子学报, 2018,0(12):1524-1531.

An-qi Tang, Jing-yu Lu, Wei-lin Feng, Pei-bin Zhang, Li-ping Zhu. Performance Control of Polydopamine Compsite Nanofiltration Membranes Fabricated by Interfacial Crosslinking[J]. Acta Polymerica Sinica, 2018,0(12):1524-1531.
唐安琪, 路景驭, 冯炜林, 张培斌, 朱利平. 界面交联制备聚多巴胺复合纳滤膜的性能调控[J]. 高分子学报, 2018,0(12):1524-1531. DOI： 10.11777/j.issn1000-3304.2018.18109.

An-qi Tang, Jing-yu Lu, Wei-lin Feng, Pei-bin Zhang, Li-ping Zhu. Performance Control of Polydopamine Compsite Nanofiltration Membranes Fabricated by Interfacial Crosslinking[J]. Acta Polymerica Sinica, 2018,0(12):1524-1531. DOI： 10.11777/j.issn1000-3304.2018.18109.

摘要

通过多巴胺在水溶液中的自聚-组装，形成聚多巴胺(PDA)纳米聚集体，进一步以尺寸可调的PDA纳米聚集体为水相反应物，以酰氯为油相单体，通过界面交联法制备了渗透选择性优异的复合纳滤膜，其分离性能可通过水相pH值进行调控. 采用紫外吸收光谱和动态光散射等表征了PDA聚集体在水相中的结构特点，分析了复合膜表面的微观结构与物化性质. 研究发现，随着水相pH值由中性(pH = 6)向强碱性(pH = 13)逐渐过渡，复合膜的Na

截留率呈先增后减趋势. 在水相pH = 12时，制得的复合膜于0.4 MPa下纯水通量可达64 L m

−2

−1

，Na

的截留率达90%，对染料日落黄的截留率达97%. 与文献报道的PDA表面沉积法相比，此方法大大缩短了PDA沉积时间，提高了制膜效率，所制备的复合纳滤膜分离性能可调.

Abstract

Composite nanofiltration membranes with tunable permeation and separation properties were prepared by interfacial crosslinking reaction between polydopamine (PDA) and trimesoyl chloride (TMC). Dopamine was first allowed to self-polymerize into oligomers or nanoaggregates in its aqueous solution at room temperature. As the size of PDA aggregates was readily modulated by measuring the pH of water phase

the separation precision of composite membranes could then be controlled. Ultraviolet spectra and dynamic light scattering ensured that the size of PDA nanoaggregates varied with pH values of aqueous solution. Attenuated total reflectance Fourier transform infrared spectroscopy

scanning electronic microscopy and contact angle measurement were employed to characterize the surface chemistry and morphology of the obtained composite membranes. It was found that

when the pH value of aqeuous phase increased from 6 to 12

the separation scale of composite membranes became progressively smaller and reached its highest selectivity at pH = 12

with rejection of Na

and sunset yellow being 90% and 97% respectively

flux reaching 64 L m

−2

−1

under 0.4 MPa. Increasing pH value to 13 caused a decline of separation properties

probably owing to a decomposition of PDA aggregates under strongly alkaline condition. Compared with PDA deposition method

which had been reported before

this work has considerably reduced the deposition time and produced a denser top layer

improving both preparation and separation efficiencies. By adjusting the size of the reactants before interfacial crosslinking

this study facilitated the regulation of separation precision of nanofiltration membranes.

关键词

多巴胺纳滤界面交联分离精度

Keywords

PolydopamineInterfacial crosslinkingNanofiltrationSeparation precision

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