Characterization and evaluation of the hydrolytic stability of trifluoroacetylated cellulose fibers

Composites based on acylated cellulose fibers and low-density polyethylene: Effect of the fiber content, degree of substitution and fatty acid chain length on final properties

“…As part of a wider research project on the heterogeneous chemical modification of cellulose fibers [6,7,[13][14][15][16] for new applications (composites, paper materials, etc) we have been studying the preparation and characterization of composite materials based on acylated cellulose fibers and low-density polyethylene (LDPE). In this investigation, cellulose fibers modified with different fatty acids (C6, C12, C18 and C22) and different DS were investigated.…”

Turning polysaccharides into hydrophobic materials: a critical review. Part 1. Cellulose

“…To take advantage of these properties, recent investigations called upon trifluoroacetic anhydride as the esterification reagent for the surface of cellulose fibers. The reaction was carried out both in the gas (Ostenson et al 2006;Yuan et al 2005) and the liquid phase (Cunha et al 2006(Cunha et al , 2007a. The presence of the CF 3 groups at the cellulose surface gave rise to strongly hydrophobic and lipophobic properties, as can be verified, for the case of the liquid phase system, by the high contact angles with both polar (water) and non-polar (diiodomethane) liquids, presented in Table 1 (Cunha et al 2006).…”

Nonxylan Hemicelluloses as a Source of Renewable Materials

“…The success of the surface fluorination method, which involved reaction with gaseous trifluoroacetic anhydride (TFAA), was confirmed using FTIR spectroscopy and surface contact angle measurements (Figure 15.8). However, as pointed out by Cunha et al (2007) and also mentioned in the context of cellulose fiber esterification with perfluorinated carboxylic moieties (Cunha and Gandini, 2010b), trifluoroacetates are sensitive to water and this would limit the range of possible applications.…”