Fabrication of CaCO3-biopolymer thin films using supercritical carbon dioxide

Journal of Materials Chemistry

Volumn 15, Issue 11, 2005, Pages 1134-1136

  Wakayama, Hiroaki ^a   Hall, Simon R ^b   Mann, Stephen ^b  

^a Rd Management Section   (Japan)

^b UNIVERSITY OF BRISTOL   (United Kingdom)

Author keywords

[No Author keywords available]

Indexed keywords

ACRYLICS; BIOFILMS; BIOMASS; BIOPOLYMERS; CALCIUM COMPOUNDS; CARBON DIOXIDE; CELLULOSE; NANOSTRUCTURED MATERIALS; ORGANIC ACIDS; SPIN COATING;

BIOPOLYMER FILMS; POLYACRYLIC ACID; RESOURCE DEPLETION; SUSTAINABLE MATERIALS;

THIN FILMS;

EID: 16244403294     PISSN: 09599428     EISSN: None     Source Type: Journal    
DOI: 10.1039/b418569b     Document Type: Article

References (22)

1. Biomimetic Materials Chemistry, ed. S. Mann, VCH Publishers, New York, 1996.
2. Biomimetics. Design and Processing of Materials, ed. M. Sarikaya and I. A. Aksay, American Institute of Physics, New York, 1995.
3. M. A. Borowitzka, in Biomineralization: Chemical and Biochemical Perspectives, ed. S. Mann, J. Webb and R. J. P. Williams, VCH Publishers, Weinheim, 1989, ch. 3, p. 63; S. Mann, Biomineralization. Principles and Concepts in Bioinorganic Materials Chemistry, OUP, Oxford, 2001.
4. M. A. Borowitzka, in Biomineralization: Chemical and Biochemical Perspectives, ed. S. Mann, J. Webb and R. J. P. Williams, VCH Publishers, Weinheim, 1989, ch. 3, p. 63; S. Mann, Biomineralization. Principles and Concepts in Bioinorganic Materials Chemistry, OUP, Oxford, 2001.
5. J. Aizenberg, A. J. Black and G. M. Whitesides, Nature, 1999, 398, 495.
6. J. Kuther, R. Seshadri, G. Nelles, W. Assenmacher, H. J. Butt, W. Mader and W. Tremel, Chem. Mater., 1999, 11, 1317.
7. B. R. Heywood and S. Mann, Adv. Mater., 1994, 6, 9.
8. H. Colfen, Curr. Opin. Colloid Interface Sci., 2003, 8, 23.
9. G. Falini, S. Fermani, M. Gazzano and A. Ripamonti, Chem. Eur. J., 1998, 4, 1048.
10. L. Pach, Z. Hrabe, S. Komarneni and R. Roy, J. Mater. Res., 1990, 5, 2928.
11. T. Kato, Adv. Mater., 2000, 12, 1543.
12. S. Zhang and K. E. Gonsalves, Langmuir, 1998, 14, 6761.
13. P. G. Jessop and W. Leitner, Chemical Synthesis using Supercritical Fluids, Wiley-VCH, New York, 1999.
14. J. A. Darr and M. Poliakoff, Chem. Rev., 1999, 99, 495.
15. H. M. Woods, M. C. G. Silva, C. Nouvel, K. M. Shakesheff and S. M. Howdle, J. Mater. Chem., 2004, 14, 166.
16. H. M. Aydin, E. Piskin and A. Calimli, J. Bioactive Comp. Polym., 2004, 19, 383.
17. S. N. Paisner and J. M. DeSimone, ACS Symp. Ser., 2004, 874, 223.
18. A. I. Cooper, J. Mater. Chem., 2000, 10, 207.
19. r = 2000) and calcium acetate monohydrate were purchased from Aldrich. Ammonia (28 wt% aqueous solution) was obtained from Lancaster. All reagents were analytical grade and used without further purification. Chitosan solutions were prepared by adding 0.2 g of chitosan and 0.198 g of acetic acid to 19.602 g of ion-exchanged water (relative resistance, 20.0 MΩ cm). Aqueous solutions of cellulose were prepared by dissolving 0.1 g of cellulose in 10 mL of a copper(II) hydroxide/ ammonia solution (2 g of copper(II) hydroxide/20 mL 28 wt% aqueous ammonia). Solid films of cellulose or chitosan were obtained by spin-coating on a glass substrate using a commercial spin coater (WS-400A-6NPP/LITE/HSP, Laurell Technologies Co.). The cellulose films were washed several times with dilute hydrochloric acid followed by ionexchanged water to remove residual Cu(II) salts. Chitosan films were washed with dilute aqueous ammonia and ion-exchanged water.
20. 2 and heated in an oil bath at 323 K and 7.5 MPa for 2 hours.
21. -2 wt% were almost identical; viz. 0.03, 0.08 and 0.02 g, respectively. Corresponding values for cellulose films were 0.04, 0.16 and 0.02 g.
22. α radiation. FT-IR spectroscopy measurements (Perkin Elmer Spectrum One) were performed using KBr disks on samples prepared by scraping the films off the glass substrate.