Sol-Gel Synthetic Model of Bi-Structured Bioactive Nano-Hybrids in TEOS-PDMS System

Abstract:

Ceramic-polymer bi-structured nano-hybrid, in which the bioactive silicate surface is nano-hybridized with flexible polymeric bulk, was synthesized in the tetraethoxysilane (TEOS)-polydimethylsiloxane (PDMS) sol-gel system. Different solutions for surface and bulk, whose compositions of TEOS: PDMS were respectively fixed 100: 0 and varied from 50: 50 to 20: 80 with various molecular weight (Mw) of PDMS, were subjected to lamination and controlled polymerization and condensation process, producing a large transparent crack-free monolithic bulk. Characterizations at near-surface cross-section of the bi-structured hybrids revealed that typical bioactive silicate was combined with all types of bulk hybrids regardless of their PDMS contents and Mw without distinct interface, indicating possibility of a novel bioactive nano-composite with enhanced physical and biological functions.

• Periodical: Key Engineering Materials (Volumes 309-311)
• Pages: 557-560
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.309-311.557
• Online since: May 2006
• Authors: Kang Yong Lee, Y.H. Lee, Hyun Min Kim, J. Kwak, H.K. Lee
• Keywords: Bioactivity, Bi-Structure, Nano-Hybrid, PDMS (Polydimethylsiloxane), Silicate, Sol-Gel Process

References

[1] L. L. Hench: J. Am. Ceram. Soc. Vol. 74 (1991), pp.1487-1510.

[2] H. -M. Kim: J. Ceram. Soc Jpn. Vol. 109 (2001), S49-57.

[3] T. Kokubo, H. -M. Kim and M. Kawashita: Biomaterials, Vol. 24 (2003), pp.2161-2175.

[4] K. Tsuru, C. Ohtsuki, A. Osaka, T. Iwamoto and J. D. Mackenzie: J. Mater. Sci.: Mater. Med. Vol. 8 (1997), pp.157-161.

[5] Q. Chen, F. Miyaji, T. Kokubo and T. Nakamura: Biomaterials Vol. 20 (1999), pp.1127-1132.

[6] C. Ohtsuki, T. Kokubo and T. Yamamuro: J. Non-Cryst. Solid Vol. 143 (1992), pp.84-92.