Conversion of an electrospun nanofibrous cellulose acetate mat from a super-hydrophilic to super-hydrophobic surface

Bin Ding, Chunrong Li, Yoshio Hotta, Jinho Kim, Oriha Kuwaki, Seimei Shiratori

Research output: Contribution to journalArticle

68 Citations (Scopus)

Abstract

We report a new approach to convert an electrospun nanofibrous cellulose acetate mat surface from super-hydrophilic to super-hydrophobic. Super-hydrophilic cellulose acetate nanofibrous mats can be obtained by electrospinning hydrophilic cellulose acetate. The surface properties of the fibrous mats were modified from super-hydrophilic to super-hydrophobic with a simple sol-gel coating of decyltrimethoxysilane (DTMS) and tetraethyl orthosilicate (TEOS). The resultant samples were characterized by field emission scanning electron microscopy (FE-SEM), x-ray photoelectron spectroscopy (XPS), water contact angle, Brunauer-Emmett-Teller (BET) surface area, atomic force microscopy (AFM), and UV-visible measurements. The results of FE-SEM and XPS showed that the sol-gel (I) films were formed on the rough fibrous mats only after immersion in sol-gel. After the sol-gel (I) coating, the cellulose acetate fibrous mats formed in both 8 and 10 wt% cellulose acetate solutions showed the super-hydrophobic surface property. Additionally, the average sol-gel film thickness coated on 10 wt% cellulose acetate fibrous mats was calculated to be 80 nm. The super-hydrophobicity of fibrous mats was attributed to the combined effects of the high surface roughness of the electrospun nanofibrous mats and the hydrophobic DTMS sol-gel coating. Additionally, hydrophobic sol-gel nanofilms were found to be transparent according to UV-visible measurements.

Original languageEnglish
Article number009
Pages (from-to)4332-4339
Number of pages8
JournalNanotechnology
Volume17
Issue number17
DOIs
Publication statusPublished - 2006 Aug 1

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Sol-gels
Cellulose
Photoelectron spectroscopy
Field emission
Coatings
Surface properties
X rays
Scanning electron microscopy
Electrospinning
Hydrophobicity
acetylcellulose
Contact angle
Film thickness
Atomic force microscopy
Surface roughness
Water

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Electrical and Electronic Engineering
  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Science(all)

Cite this

Conversion of an electrospun nanofibrous cellulose acetate mat from a super-hydrophilic to super-hydrophobic surface. / Ding, Bin; Li, Chunrong; Hotta, Yoshio; Kim, Jinho; Kuwaki, Oriha; Shiratori, Seimei.

In: Nanotechnology, Vol. 17, No. 17, 009, 01.08.2006, p. 4332-4339.

Research output: Contribution to journalArticle

Ding, Bin ; Li, Chunrong ; Hotta, Yoshio ; Kim, Jinho ; Kuwaki, Oriha ; Shiratori, Seimei. / Conversion of an electrospun nanofibrous cellulose acetate mat from a super-hydrophilic to super-hydrophobic surface. In: Nanotechnology. 2006 ; Vol. 17, No. 17. pp. 4332-4339.
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