Clean and reactive nanostructured cellulose surface

M. Österberg (Corresponding Author), Soledad Peresin, L.-S. Johansson, Tekla Tammelin (Corresponding Author)

Research output: Contribution to journalArticleScientificpeer-review

15 Citations (Scopus)

Abstract

A simple, solvent-free and low cost method to activate the surface of nanofibrillated cellulose films for further functionalization is presented. The method is based on the oxidative properties of UV radiation and ozone, to effectively remove contaminants from nanocellulosic surface, which remains clean and reactive for at least a week. The efficiency of the method is demonstrated by X-ray photoelectron spectroscopy (XPS) and contact angle measurements. In clear contrast to previous results on nanoscaled cellulose the relative atomic concentration of non-cellulosic carbon atoms was only 4 %, and water completely wetted the surface within seconds. After activation, neither chemical degradation nor morphological changes on cellulose were observed. This surface activation is essential for further functionalization of the film in dry state or nonpolar media. The surface activation was confirmed by silylation and a four times higher degree of substitution was achieved on the activated sample compared to non-activated reference film, as monitored with XPS.
Original languageEnglish
Pages (from-to)983-990
Number of pages8
JournalCellulose
Volume20
Issue number3
DOIs
Publication statusPublished - 2013
MoE publication typeA1 Journal article-refereed

Fingerprint

Cellulose
Chemical activation
X ray photoelectron spectroscopy
Cellulose films
Ozone
Angle measurement
Ultraviolet radiation
Contact angle
Substitution reactions
Carbon
Impurities
Degradation
Atoms
Water
Costs

Keywords

  • cleaning
  • film
  • microfibrillated cellulose
  • ozonation
  • UV

Cite this

Österberg, M. ; Peresin, Soledad ; Johansson, L.-S. ; Tammelin, Tekla. / Clean and reactive nanostructured cellulose surface. In: Cellulose. 2013 ; Vol. 20, No. 3. pp. 983-990.
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Österberg, M, Peresin, S, Johansson, L-S & Tammelin, T 2013, 'Clean and reactive nanostructured cellulose surface', Cellulose, vol. 20, no. 3, pp. 983-990. https://doi.org/10.1007/s10570-013-9920-8

Clean and reactive nanostructured cellulose surface. / Österberg, M. (Corresponding Author); Peresin, Soledad; Johansson, L.-S.; Tammelin, Tekla (Corresponding Author).

In: Cellulose, Vol. 20, No. 3, 2013, p. 983-990.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Clean and reactive nanostructured cellulose surface

AU - Österberg, M.

AU - Peresin, Soledad

AU - Johansson, L.-S.

AU - Tammelin, Tekla

PY - 2013

Y1 - 2013

N2 - A simple, solvent-free and low cost method to activate the surface of nanofibrillated cellulose films for further functionalization is presented. The method is based on the oxidative properties of UV radiation and ozone, to effectively remove contaminants from nanocellulosic surface, which remains clean and reactive for at least a week. The efficiency of the method is demonstrated by X-ray photoelectron spectroscopy (XPS) and contact angle measurements. In clear contrast to previous results on nanoscaled cellulose the relative atomic concentration of non-cellulosic carbon atoms was only 4 %, and water completely wetted the surface within seconds. After activation, neither chemical degradation nor morphological changes on cellulose were observed. This surface activation is essential for further functionalization of the film in dry state or nonpolar media. The surface activation was confirmed by silylation and a four times higher degree of substitution was achieved on the activated sample compared to non-activated reference film, as monitored with XPS.

AB - A simple, solvent-free and low cost method to activate the surface of nanofibrillated cellulose films for further functionalization is presented. The method is based on the oxidative properties of UV radiation and ozone, to effectively remove contaminants from nanocellulosic surface, which remains clean and reactive for at least a week. The efficiency of the method is demonstrated by X-ray photoelectron spectroscopy (XPS) and contact angle measurements. In clear contrast to previous results on nanoscaled cellulose the relative atomic concentration of non-cellulosic carbon atoms was only 4 %, and water completely wetted the surface within seconds. After activation, neither chemical degradation nor morphological changes on cellulose were observed. This surface activation is essential for further functionalization of the film in dry state or nonpolar media. The surface activation was confirmed by silylation and a four times higher degree of substitution was achieved on the activated sample compared to non-activated reference film, as monitored with XPS.

KW - cleaning

KW - film

KW - microfibrillated cellulose

KW - ozonation

KW - UV

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