Deewan , Akram and Ahmad, Shahzada and Sharmin, Eram and Ahmad, Sharif (2009) Silica Reinforced Organic–Inorganic Hybrid Polyurethane Nanocomposites From Sustainable Resource. Macromolecular Chemistry and Physics, 211 (4). pp. 412-419. ISSN 1022-1352

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Abstract

Polyol/nanosilica organic–inorganic hybrids (Si/Lpol) were prepared through facile sol–gel chemistry. Tetraethoxyorthosilane (TEOS) and linseed polyol (Lpol) obtained by hydroxylation of linseed oil were used as inorganic and organic precursors, respectively. Si/Lpol was further treated with toluene-2,4-diisocyanate (TDI) to obtain silica embedded polyurethane (Si/LPU). The structure of the organic–inorganic hybrid was confirmed by FTIR, 1H NMR, and 13C NMR spectral analysis. The polyol/nanosilica network shows strong interaction with the remnant polyol backbone through hydrogen bonding, which also has bearing on Tg of polymers. Morphological studies of Si/LPU show the formation of uniform, spherical silica nanoparticles of 2–30 nm size embedded in the polymer matrix. Si/LPU was further reinforced with 2 and 5 wt.-% fumed silica (FS-Si/LPUs); their morphology revealed a carpet layer formation on top of Si/LPU. Thermogravimetric analysis showed improved thermal stability of Si/LPU and FS-Si/LPUs. The polymers exhibit mild to moderate antibacterial behavior against E. coli and S. aureus, respectively, and will pave way in plethora of biological and chemical applications as coating materials.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s Wiley-VCH Verlag Berlin.
Uncontrolled Keywords:	nanoparticles; renewable resources; synthesis; TEM
Subjects:	Polymer Science
Divisions:	UNSPECIFIED
Depositing User:	Ms Neetu Chandra
Date Deposited:	09 Jul 2012 07:29
Last Modified:	09 Jul 2012 07:29
URI:	http://npl.csircentral.net/id/eprint/307

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