Cellulose esters from birch kraft pulps: new biomaterials for barrier coating

Riku A. Talja, Tuomas P.S. Kulomaa, Sara Labafzadeh, Lasse E. Kyllönen, Alistair W.T. King, Ilkka Kilpeläinen, Kristiina Poppius-Levlin

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

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Abstract

In the present study cellulose fatty acid esters were synthesized and characterized from chemical pulps, with different hemicellulose contents. We proceeded then to prepare and characterize paperboard coatings based on these materials. The cellulose esters obtained were characterized by FTIR and 31P NMR. The degree of substitution was found to increase from 0.8 to 2.8, with increasing fatty acid chloride stoichometry. The coatings were clearly hydrophobic and the barrier properties importantly were found not to vary significantly at all between the cellulose substituents and the degrees of substitution. Water contact angle values were over 90°. Hydrophobicity was also confirmed by low water absorption into the coated boards; the values being similar to those of commercial ones. The best water vapor barrier properties, i.e. the lowest water vapor transmission rates (WVTR) were obtained for the coatings prepared from the palmitoyl esters of the low hemicellulose content pulp cellulose. This compound was comparable to those of commercial PE- and PLA-coated boards. The cellulose ester coated boards were also good oil and grease barriers.
Original languageEnglish
Title of host publicationProceedings
Subtitle of host publication16th International Symposium on Wood, Fiber and Pulping Chemistry, 16th ISWFPC
Pages1394-1398
Volume2
Publication statusPublished - 2011
MoE publication typeA4 Article in a conference publication
Event16th International Symposium on Wood, Fiber and Pulping Chemistry, 16th ISWFPC - Tianjin, China
Duration: 8 Jun 201110 Jun 2011

Conference

Conference16th International Symposium on Wood, Fiber and Pulping Chemistry, 16th ISWFPC
Abbreviated title16th ISWFPC
CountryChina
CityTianjin
Period8/06/1110/06/11

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Keywords

  • cellulose fatty acid ester
  • birch kraft pulp
  • degree of substitution
  • paperboard coating
  • barrier

Cite this

Talja, R. A., Kulomaa, T. P. S., Labafzadeh, S., Kyllönen, L. E., King, A. W. T., Kilpeläinen, I., & Poppius-Levlin, K. (2011). Cellulose esters from birch kraft pulps: new biomaterials for barrier coating. In Proceedings: 16th International Symposium on Wood, Fiber and Pulping Chemistry, 16th ISWFPC (Vol. 2, pp. 1394-1398)