Lecturers, Department of Fashion
Kumara guru College of Technology, Coimbatore - 6
Bio shield AM 500 3- (trimethoxy silyl)- propyl - dimethyl
octadecyl ammonium chloride was applied to cotton
fabrics by a cold pad-batch method in the presence of an alkaline catalyst to
evaluate its use as a durable antimicrobial finish. The antimicrobial
activities of the Bio shield AM 500 treated cotton
fabrics were evaluated quantitatively against AATCC 147 by Gram
staining and Turbidity test method. The turbidity value was
maintained over 187 even after being exposed to 15 consecutive home laundering conditions.
The antimicrobial treated sweat sample was tested for microbial activity and
the turbidity was 189.
In the present day world most of us are very conscious about
our hygiene and cleanliness. Clothing and textile materials are not only the
carriers of microorganisms such as pathogenic bacteria, odour generating
bacteria and mould fungi, but also good media for the growth of the microorganisms.
Microbial infestation poses danger to both living and non
living matters. Obnoxious smell form the inner garments such as socks, spread
of diseases, staining and degradation of textiles are some of the detrimental
effects of bad microbes. Though the use of antimicrobials have been known for
the decades, it is only in the recent couple of years several attempts have
been made on finishing textiles with antimicrobial compounds. Anti microbial
finish is a recent innovation in finishes. The consumers are now increasingly
aware of the hygienic life style and there is a necessity and expectation for a
wide range of textile products finished with antimicrobial properties. This
finish prevents the growth of bacteria and products finished in it have been
proved environment friendly and health protecting, preventing diseases. It also
prevents garments from unpleasant odour.
In this research, subjective evaluations of antimicrobial
finish applied fabrics are analyzed. The result of the antimicrobial activity
is based on the standard test method AATCC 147 for evaluating antimicrobial effectiveness.
Cotton fabric with the following specification is scoured
and bleached prior to the application of finish.
Fabric Count :
80 x 80
Yarn Count :
60s Combed X 60s Combed
Type of weave :
Bio shield AM 500 which is an aqueous solution of silicon
quaternary ammonium salt, the key ingredient in it being 3 - (trimethoxy silyl)
- propyl - dimethyl octadecyl ammonium chloride.
The material is treated with 2g/l acetic acid at 70 0C
for 15 minutes with water. The liquor ratio is 1:20. The material is
given a cold wash for 5 minutes. The pH is maintained at 7.