The technology of digital inkjet printing requires inkjet printing dye with high purity and low salt. Based on preparation of GO / nano TiO
2
self-assembled nanofiltration membrane
the size of nano TiO
2
particles and the blending ratio with GO were explored. The optimal GO/TiO
2
composite nanofiltration membrane was obtained in which the TiO
2
particle size was 60 nm and the blending ratio with GO was 1∶1. The pure water permeance was 10.69 L/(m
2
·h·bar)
the rejection of NaCl and Na
2
SO
4
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 Na
2
SO
4
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.
关键词
Keywords
references
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