Temperature-responsive nanofibers for controllable oil/water separation

Yuanfeng Wang, Chuilin Lai, Huawen Hu, Yang Liu, Bin Fei, John Haozhong Xin

Research output: Journal article publicationJournal articleAcademic researchpeer-review

49 Citations (Scopus)


Surface functionalization with stimuli-responsive materials can turn an ordinary material into a smart one that shows adaptive properties upon external stimuli. In this study, an electrospun regenerated cellulose (RC) nanofibrous membrane was firstly prepared; subsequently, poly(N-isopropylacrylamide) (PNIPAAm), a thermo-responsive polymer, was surface grafted to form the polymer chains/brushes on the surface of RC nanofibers via the surface-initiated atom transfer radical polymerization (SI-ATRP) method. Thereafter, the PNIPAAm-modified RC nanofibrous membrane was investigated for its temperature-responsive surface wettability at temperatures below/above the lower critical solution temperature (LCST). Furthermore, the nature of the hydrophilic/hydrophobic transitions of the modified nanofibrous membrane was also investigated through the water up-take and release experiment at various temperatures. Especially, as responses to different temperatures, the PNIPAAm-grafted nanofibrous membrane exhibits switchable super-lyophilic/super-lyophobic properties at a water-oil-solid three-phase interface. With the large surface area and switchable surface wettability, the as-prepared PNIPAAm-grafted nanofibrous membrane exhibits excellent properties of controllable oil/water separation, and possesses great potential towards both wastewater treatment and oil purification.
Original languageEnglish
Pages (from-to)51078-51085
Number of pages8
JournalRSC Advances
Issue number63
Publication statusPublished - 1 Jan 2015

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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