Achievements
1982 - master’s degree, wood technology (specialty: chemical wood technology); Faculty of Wood Technology, Poznań Agricultural Academy,
1991 - Ph.D., (technical sciences), Faculty of Wood Technology, Poznań Agricultural Academy,
2009 - habilitation (forestry sciences), Faculty of Wood Technology, Poznań University of Life Science
Research areas
- Oxidative treatment of pulp: hydrogen peroxide brightening and bleaching, the role of stabilizers and catalysts during hydrogen peroxide treatment,
- Pulping - the use of non-wood raw materials in semi-chemical pulping, NSSC process optimization,
- Paper conservation: deacidification and strengthening
- Yellowing of pulp and paper
Scientific projects
- The evaluation of pulp brightening efficiency with the use of hydrogen peroxide under acidic and alkaline conditions (State Committee for Scientific Research - Poland, grant no 7 T08E 045 20)
- Short sequency, ecological, oxygen delignified kraft pul bleaching with the use of hydrogen peroxide and controlled dosage of magnesium sulfate (State Committee for Scientific Research - Poland, grant no 3 T08E 00226)
- Magnesium hydroxide nanoparticles as a paper degradation retardants (National Science Center - Poland, grant no. DEC-2012/05/B/HS2/03999.)
Publications
1. Wójciak A., Pekarovicova A. (2001): Enhancement of softwood kraft pulp accessibility for enzymatic hydrolysis by means of ultrasonic irradiation. Cellulose Chem. Technol., 35, 3-4, 361-369.
2. Wójciak A., Sikorski M., Gonzalez-Moreno R., Bourdelande J.L., Wilkinson F. (2002): The use of diffuse-reflectance laser-flash photolysis to study the photochemistry of the kraft pulp treated with hydrogen peroxide under alkaline and acidic conditions. Wood Sci. Technol., 36, 187-195.
3. Wójciak A. (2006): Influence of magnesium addition on hydrogen peroxide bleaching of the acid treated pinewood kraft pulp. EJPAU - Electronic Journal of the Polish Agricultural Universities, vol. 9, Issue 1. Available Online http://www.ejpau.media.pl/volume
4. Wójciak A., Joachimiak K. (2006): Rola katalizatorów metalicznych i stabilizatorów w trakcie bielenia świerkowej masy chemotermomechanicznej nadtlenkiem wodoru w środowisku kwaśnym i alkalicznym (The role of metal catalysts and stabilizers during spruce CTMP brightening with the use of hydrogen peroxide under acid and alkaline conditions). Przemysł chemiczny, 85/8-9.
5. Sikorska E., Khmelinskii I.V., Krawczyk A., Oliveira A.S., Ferreira L.F.V., Wójciak A., Sikorski M., (2006): Spectral and photophysical properties of thermomechanical pulps bleached with the use of acidified and alkaline hydrogen peroxide. J. Photochem. Photobiol., A: Chemistry, volume 184, issues 1-2, pp. 66-72.
6. Wójciak A., Kasprzyk H., Khmelinskii I. V, Krawczyk A., Oliveira A. S., Ferreira L.
F. V., Weselucha-Birczynska A., Sikorski M. (2007): Direct Characterization of
Hydrogen Peroxide Bleached Thermomechanical Pulp Using Spectroscopic Methods. J. Phys. Chem. A.: Chemistry 111(42): 10530 - 10536. avalable on-line
7. Wójciak A., Kasprzyk H., Sikorska E., Khmelinskii I., Krawczyk A., Oliveira A. S., Ferreira L.F.V., Sikorski M. (2010): Changes in chromophoric composition of high-yield mechanical pulp due to hydrogen peroxide bleaching under acidic and alkaline conditions. J. Photochem. Photobiol. A: Chemistry: 215, 157 – 163.
8. Bocianowski J., Joachimiak K., Wójciak A. (2012): The influence of process variables on the strength properties of NSSC birch pulp. Towards the limits of optimization: part one - the effect of liquor ratio. Drewno, vol. 55, nr 188, 17 - 32,
9. Bocianowski J., Joachimiak K., Wójciak A. (2013): The influence of process variables on the strength properties of NSSC birch pulp. Towards the limits of optimization: part one - the effect of time and temperature. Drewno, vol. 56, nr 189, 71 - 87
10. Wójciak A., Kasprzyk H., Sikorska E., Krawczyk A., Sikorski M., Wesełucha-Birczyńska A. (2014): FT-Raman, FT IR and NIR Spectroscopic Characterization of Oxygen-Delignified Kraft Pulp Treated with Hydrogen Peroxide under Acidic and Alkaline Conditions. Vibrational Spectroscopy, 71, 62–69
11. Wójciak A., Washing, spraying and brushing. A comparison of paper deacidification by magnesium hydroxide nanoparticles, Restaurator, International Journal for the Preservation of Library and Archival Material, (2015), vol. 36 no 1, s. 3-23,
12. Wójciak A., Deacidification of paper with Mg(OH)2 nanoparticles: the impact of dosage on process effectiveness. Wood Research, (2016), vol. 61(6), s. 937 - 950,
Other
1996 (3 month) /1997 (2.5 month) - Institute Nationale Polytechnique de Grenoble, Ecole Francaise de Papeterie et des Industrie Graphiques (Francja), TEMPUS academic trainings.