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Preliminary
investigation into the potentials of Clapertoniana- oxazolidine
tannage as an alternative to chromium (III) tannage in the
tanning industry
Maju*1C. C; Covington2, A. D. and Ukoha1,
P.O.
1. Fed. College of
Chemical & Leather Technology
P.M.B. 1034, Zaria, Kaduna State.
E-mail:
chrismaju@yahoo.com
2. University College Northampton
BSLT, NN2 7AL, Bolton Green Rd, Northampton UK.
Abstract
Differential scanning calorimetry of leather produced from
combination tannage using tannins of Parkia clappertoniana fruit
husk and oxazolidine has shown that the hydrothermal stability is
favourably comparable to that of chrome tanned leather. Gel
permeation chromatography of absolute ethanol extracts of the
clappertoniana fruit husk gives molecular weight distribution of the
colloidal and polydisperse tannins to be in the range for proper
penetration and crosslinking of collagen fibres.
The tanning process
has been redesigned to improve the physical properties of the
resultant leather, and also reduce the amount of chromium in tannery
effluents. |
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