Polyethylenimine coated bacterial cellulose nanofiber membrane and application as adsorbent and catalyst

Jianqiang Wang, Xinkun Lu, Pui Fai Ng, Ka I. Lee, Bin Fei, John Haozhong Xin, Jianyong Wu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

60 Citations (Scopus)

Abstract

Bacterial cellulose (BC) nanofiber membranes were simply aminalized by a flush-coating and post-crosslinking method. Firstly, wet BC membranes were flushed through by an aqueous solution of polyethylenimine (PEI) and glycerol diglycidyl ether (GDE) under vacuum suction, then further heated up to 70°C to crosslink the resultant coating on the surface of the nanofibers. The PEI coated bacterial cellulose (BC@PEI) nanofiber membrane presented excellent adsorption performance for Cu2+and Pb2+ions from aqueous solutions. Desorption of these ions was achieved using ethylene diamine tetraacetic acid treatment. This cycle of adsorption and desorption was repeated for several times with good remain adsorption performance (over 90%). Furthermore, the adsorbed Cu2+ions can be reduced to copper nanoparticles, and showed excellent catalytic performance for methylene blue reduction in aqueous solution. The catalytic performance can remained after several times of usage.
Original languageEnglish
Pages (from-to)32-38
Number of pages7
JournalJournal of Colloid and Interface Science
Volume440
DOIs
Publication statusPublished - 5 Feb 2015

Keywords

  • Adsorption
  • Bacterial cellulose
  • Catalyst
  • Nanofiber
  • Polyethylenimine

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Surfaces, Coatings and Films
  • Colloid and Surface Chemistry

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