CIESC Journal ›› 2020, Vol. 71 ›› Issue (3): 1352-1361.DOI: 10.11949/0438-1157.20190861

• Material science and engineering, nanotechnology • Previous Articles     Next Articles

Preparation of self-assembled graphene oxide / nano TiO2 composite nanofiltration membrane for inkjet printing dye

Yanqing XU1,2,Wenfei LI1,Mengyao WU2,Jiangnan SHEN1,2()   

  1. 1.College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, Zhejiang, China
    2.Center for Membrane Separation and Water Science & Technology, Zhejiang University of Technology, Hangzhou 310014, Zhejiang, China
  • Received:2019-07-30 Revised:2019-10-29 Online:2020-03-05 Published:2020-03-05
  • Contact: Jiangnan SHEN

用于喷墨印花染料纯化的自组装GO/TiO2复合纳滤膜的制备

徐燕青1,2,李文飞1,吴梦瑶2,沈江南1,2()   

  1. 1.浙江工业大学化工学院,浙江 杭州 310014
    2.浙江工业大学膜分离与水科学技术中心,浙江 杭州 310014
  • 通讯作者: 沈江南
  • 基金资助:
    浙江省自然科学基金青年项目(Q19B060013)

Abstract:

The technology of digital inkjet printing requires inkjet printing dye with high purity and low salt. Based on preparation of GO / nano TiO2 self-assembled nanofiltration membrane, the size of nano TiO2 particles and the blending ratio with GO were explored. The optimal GO/TiO2 composite nanofiltration membrane was obtained in which the TiO2 particle size was 60 nm and the blending ratio with GO was 1∶1. The pure water permeance was 10.69 L/(m2·h·bar), the rejection of NaCl and Na2SO4 was 12.6% and 15.7% respectively, and the rejection of Eriochrome black T, Congo red and Coomassie brilliant blue R were all higher than 99%. The home-made continuous constant volume diafitration device was used to conduct the dye desalination and concentration experiment. The concentration of obtained ink was increased from the initial 2.0 g/L to 9.74 g/L, and the concentration of NaCl and Na2SO4 was reduced from the initial 10 g/L to 5.3 mg/L and 11 mg/L respectively, meeting the requirements of digital inkjet printing dye.

Key words: GO/TiO2 composite membrane, separation, nanoparticles, continuous constant volume diafiltration, nanofiltration

摘要:

数码喷墨打印技术对墨水高纯度和低含盐量要求,不断促使染料纯化技术的开发与研究。基于氧化石墨烯(GO)/纳米二氧化钛(TiO2)自组装的纳滤膜材料的开发,探究了纳米TiO2颗粒尺寸和与GO共混比例,所获最优GO/TiO2复合纳滤膜中TiO2颗粒尺寸为60 nm,与GO共混比例为1∶1。其纯水通量为10.69 L/(m2·h·bar),对NaCl和Na2SO4的截留分别为12.6%和15.7%,对铬黑T、刚果红和考马斯亮蓝R的截留均高于99%。采用自制的连续恒容渗滤装置对粗品墨水进行染料脱盐浓缩的实验,所获染料的浓度由最初的2.0 g/L浓缩至9.74 g/L,NaCl和Na2SO4浓度则由起始10 g/L分别下降至5.3 mg/L和11 mg/L,满足数码印花对墨水高纯度以及低盐度的要求。

关键词: GO/TiO2复合膜, 分离, 纳米粒子, 连续恒容渗滤, 纳滤

CLC Number: