Hydrophobization of phosphorylated cellulosic fibers
- 317 Downloads
Due to their flame retardant behavior, phosphorylated cellulosic fibers could be interesting candidates for use in the composite material field. However, because of the phosphate groups, the fiber network is highly charged and hydrophilic reducing its compatibility towards synthetic resins. An effective hydrophobization method for phosphorylated cellulosic fibers was therefore developed in order to enhance their hydrophobic behavior. The best results were obtained with a straightforward addition of tosylated fatty alcohols. The influence of the carbon chain length on the reaction efficiency, the thermal degradation and the hydrophobic behavior are reported. The success of the alkylation reaction was confirmed by FTIR analyses and the degree of substitution by elemental analysis. Contact angle with water of more than 100° were obtained after alkylation. The cellulosic samples were furthermore characterized by means of SEM, fiber length distribution, NMR spectroscopy and thermo gravimetric analysis.
KeywordsCellulose Fiber Lignocellulose Kraft Phosphorylation Flame retardant Alkylation Hydrophobization Composite material
Fourier transform infrared spectroscopy
Nuclear magnetic resonance
Phosphate mono esters
Fiber Quality Analyzer
Anhydrous Glucose Unit
Degree of substitution
Thermo gravimetric analysis
The manuscript was written through contributions of all authors. All authors have given approval to the final version of the manuscript.
The Natural Sciences and Engineering Research Council of Canada (NSERC), Fonds de Recherche du Québec en Nature et Technologies (FRQNT).
- Belosinschi D (2014). Coating phosphate ester dispersions for release paper production. Doctoral Thesis. Trois-Rivières, Université du Québec à Trois-RivièresGoogle Scholar
- Pappas CS, Malovikova A, Hromadkova Z, Tarantilis PA, Ebringerova A, Polissiou MG (2004) Determination of the degree of esterification of pectinates with decyl and benzyl ester groups by diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) and curve-fitting deconvolution method. Carbohydr Polym 56(4):465–469CrossRefGoogle Scholar
- Pieschel F, Lange E, Camacho J, Körber H (2004). Starch phosphates method for the production thereof and their use, United States PatentGoogle Scholar
- Pradhan, S, Pokhrel MR (2013). Spectrophotometric determination of phosphate in sugarcane juice, fertilizer, detergent and water samples by molybdenum blue method. 11(11):5Google Scholar
- Shi Y, Belosinschi D, Brouillette F, Belfkira A, Chabot B (2015) The properties of phosphorylated kraft fibers. Bioresources 10:4375Google Scholar
- Silverstein RM, Bassler GC, Morrill TC (1991) Spectrometric identification of organic compounds. Wiley, New YorkGoogle Scholar
- Watanabe K, Kato Y, Masahiko Saito T, Takeo Oba H, Fukushima H, Hara T (1986) 5-fluoro-2′-deoxyduridine derivatives and a process for the preparation thereof, U.S. Patent 4,605,645Google Scholar