Surface modified cellulose obtained by acetylation without solvents of bleached and unbleached kraft pulps

N. Olaru; L. Olaru; C. Vasile; P. Ander

Published : 2011-12-30

Vol. 56 No. 11-12 (2011)

Surface modified cellulose obtained by acetylation without solvents of bleached and unbleached kraft pulps

N. Olaru L. Olaru C. Vasile P. Ander

Abstract

Heterogeneous acetylation to a low extent of bleached and unbleached commercial kraft pulps was performed with acetic anhydride without solvents and in the presence of sulfuric acid catalyst. The process was conducted in an effort to change the polarity of studied kraft pulps and to improve their compatibility with synthetic polymers without changing their fibrous structure. It was observed that the fiber morphology does not change up to a reaction time of 3 h for both investigated materials. The hydrophilic character of the bleached pulp was decreased by acetylation to a low extent, while the unbleached material showed an initial increase of water retention capacity. At higher degrees of modification, both pulps exhibited similar hydrophilic properties. For both materials, an initial slightly increased susceptibility to enzymatic attack with cellulase from Trichoderma reesei was observed, however the acetylated bleached cellulose fibers were more susceptible to enzymatic attack than those of the unbleached material.

Keywords

celuloza ; acetylowanie ; krystaliczność ; FTIR ; dyfrakcyjna analiza rentgenowska cellulose ; acetylation ; crystallinity ; FTIR ; X-ray diffraction analysis

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Olaru, N., Olaru, L., Vasile, C., & Ander, P. (2011). Surface modified cellulose obtained by acetylation without solvents of bleached and unbleached kraft pulps. Polimery, 56(11-12), 834-840. Retrieved from https://ichp.vot.pl/index.php/p/article/view/974

References

Czarnecki L., White J. L.: J. Appl. Polym. Sci. 1980, 25, 1217.

2. Hermann A. S., Nickel J., Riedel U.: Polym. Degrad. Stab. 1998, 59, 251.

3. Glasser W. G., Taib R., Jain R. K., Kander R.: J. Appl. Polym. Sci. 1999, 73, 1329.

4. Zimmermann T., Pohler E., Geiger T.: Adv. Eng. Mater. 2004, 6, 754.

5. Ljungberg N., Bonini C., Bortolussi F., Boisson C., Heux L., Cavaille J. Y.: Biomacromolecules 2005, 6, 2732.

6. Rodionova G., Lenes M., Eriksen O., Gregersen O.: Cellulose 2011, 18, 127.

7. Yuan H., Nishiyama Y., Kuga S.: Cellulose 2005, 12, 543.

8. Freire C. S. R., Silvestre A. J. D., Pascoal Neto C., Belgacem M. N., Gandini A.: J. Appl. Polym. Sci. 2006, 100, 1093.

9. Lu J., Askeland P., Drzal L. T.: Polymer 2008, 49, 1285.

10. Olaru N., Ciolacu D., Tampu D., Olaru L.: J. Optoelectron. Adv. Mat. 2007, 9, 3917.

11. Geurden J.: Pure Appl. Chem. 1967, 14, 507.

12. Frisoni G., Baiardo M., Scandola M.: Biomacromolecules 2001, 2, 476.

13. Adebajo M. O., Frost R. L.: Spectrochim: Acta Part A 2004, 60, 2315.

14. Adebajo M. O., Frost R. L.: Spectrochim: Acta Part A 2004, 60, 449.

15. Jing Li, Li-Ping Zhang, Feng Peng, Jing Bian, Tong-Qi Yuan, Feng Xu, Rung-Can Sun: Molecules 2009, 14, 3551.

16. Biswas A., Shogren R. L., Willett J. L.: Biomacromolecules 2005, 6, 1843.

17. Biswas A., Selling G., Appell M., Woods K. K., Willett J. L., Buchanan C. M.: Carbohydrate Polym. 2007, 68, 555.

18. Peres de Paula M., Lacerda T. M., Frollini E.: eXPRES Polym. Lett. 2008, 2, 423.

19. Nelson M. L., O'Connor R. T.: J. Appl. Polym. Sci. 1964, 8, 1325.

20. Nelson M. L., O'Connor R. T.: J. Appl. Polym. Sci. 1964, 8, 1311.

21. Segal L., Creeley J. J., Martin Jr. A. E., Conrad C. M.: Text. Res. J. 1959, 29, 786.

22. Artiaga R., Naya S., Garcia A., Barbadillo F., Garcia L.: Thermochimica Acta 2005, 428, 137.

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