4.7 Article

Amphiphilic surface construction and properties of PVC-g-PPEGMA/PTFEMA graft copolymer membrane

期刊

APPLIED SURFACE SCIENCE
卷 545, 期 -, 页码 -

出版社

ELSEVIER
DOI: 10.1016/j.apsusc.2021.148985

关键词

Amphiphilic surface; Graft copolymer membrane; Antifouling; Forced self-assembly; Hydrophilic stability

资金

  1. National Natural Science Foundation of China [51603146, 51673149]
  2. Natural Science Foundation of Tianjin [18JCQNJC72200]
  3. Science&Technology Development Fund of Tianjin Education Commission for Higher Education [2018KJ198]
  4. Young Elite Scientists Sponsorship Program by China Association for Science and Technology [2019QNRC001]
  5. Science and Technology Plans of Tianjin [18PTSYJC00170]

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The amphiphilic PVC-g-PPEGMA/PTFEMA graft copolymer membrane, designed and synthesized through free radical polymerization, demonstrates excellent antifouling properties and long-term hydrophilic stability due to the synergistic effect of hydrophilic and low surface energy segments.
Inspired of the synergistic effect of the antifouling performance of hydrophilic substance and the self-cleaning function of low surface energy material, we designed and synthesized a kind of macromolecule amphiphilic graft copolymer by the free radical polymerization, which used polyvinyl chloride (PVC) as the main chains, poly (ethylene glycol) methacrylate (PEGMA) as the hydrophilic segment and trifluoroethyl methacrylate (TFEMA) as the low surface energy segment. Then, the amphiphilic PVC-g-PPEGMA/PTFEMA graft copolymer membrane was successfully prepared via surface segregation through the phase inversion process and was further optimized via the forced self-assembly through annealing treatments. The results showed that the PPEGMA chain segments migrated on the membrane surface which driven the PTFEMA chain segments to enrich on the membrane surface during the annealing process, meanwhile, annealing treatment promoted the local microphase separation and improved the mean pore size and the porosity. Based on the synergistic effect of hydrophilic and low surface energy segments, the PVC-g-PPEGMA/PTFEMA graft copolymer membrane obtained the maximum pure water flux of 510.69 +/- 16.28 L . m(-2). h(-1), flux recovery rate of 91.49% and rejection rate of 99.31% in the BSA filtration process, which also revealed significantly antifouling properties. More importantly, the PVC-g-PPEGMA/PTFEMA copolymer membrane exhibited long-time hydrophilic stability, which could extend its potential service life.

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