Birch kraft pulp has been tested for its appropriateness to be transformed into cellulose films by acylation in homogenous media (LiCl/DMAc) with two saturated fatty acid chlorides containing a chain of 10 and 16 carbon atoms. The FTIR spectra of the cellulose esters with 6 equivalents of acyl chlorides represent a significant decrease on the intensity of hydroxyl groups indicating that a number of OH groups were replaced. Novel 31P-NMR method was carried out to determine degree of substitution. The highest DS value (2.6) was obtained from the cellulose esters modified by palmitoyl chloride with a mole ratio af acylating agent to anhydroglucose units (AGU) of 6. The resultant esters were converted to films and hydrophobicity of the materials was determined. The water vapor transmission rate (WVTR) decreased with increasing chain length of the substituent, while water contact angle increased.
|Title of host publication||The 3rd Nordic Wood Biorefinery Conference, NWBC 2011, Stockholm, Sweden, 22 - 24 March 2011|
|Place of Publication||Stockholm, Sweden|
|Publication status||Published - 2011|
|MoE publication type||B3 Non-refereed article in conference proceedings|
|Event||3rd Nordic Wood Biorefinery Conference, NWBC 2011 - Stockholm, Sweden|
Duration: 22 Mar 2011 → 24 Mar 2011
|Conference||3rd Nordic Wood Biorefinery Conference, NWBC 2011|
|Period||22/03/11 → 24/03/11|
Labafzadeh, S., Kulomaa, T. P. S., Talja, R. A., Kyllönen, L. E., King, A. W. T., Poppius-Levlin, K., & Kilpeläinen, I. (2011). Fatty acid derivatives of cellulose for barrier applications. In The 3rd Nordic Wood Biorefinery Conference, NWBC 2011, Stockholm, Sweden, 22 - 24 March 2011 (pp. 250-252).