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ENCAPSULATED PLANT EXTRACTS FOR ANTIMICROBIAL FINISH ON CELLULOSIC TEXTILES

KrishiKosh

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Title ENCAPSULATED PLANT EXTRACTS FOR ANTIMICROBIAL FINISH ON CELLULOSIC TEXTILES
 
Creator PUSHPA LATHA, K
 
Contributor ANITHA, D
 
Subject PLANT, ANTIMICROBIAL, CELLULOSIC, TEXTILES
 
Description Increasing global competition in textiles has created many challenges for textile
researchers. Novel finishes of high added value for apparel fabrics are also greatly
appreciated by the most demanding consumer market. Antimicrobial textiles with
improved functionality find a variety of applications such as health and hygiene products,
specially the garments worn close to the skin and in the area of medical applications.
Textile materials are good carriers of various types of microorganisms and can
cause health related problems to the wearer. In order to protect from the wearer from such
infection the textile fabrics can be finished with antimicrobial agents. There are several
studies in literature in which natural materials have been used to give antimicrobial
finishing to the textile materials. One of the major limitations in the natural materials based
antimicrobial finishing is the non durability of the finish since they cannot form any bond
with the textile materials. Microencapsulation of natural materials is one of the methods
used to increase the durability of the antimicrobial finishing on the textile materials.
Thus, in the present study an attempt was made to finish cotton textiles with
microcapsules from plant sources with combination of gum sources to impart the
antimicrobial finish. Microcapsules were prepared with plant sources as a core material
and gum sources as wall material at two different concentrations. Scanning Electron
Microscope (SEM) at 1600 to 8500 magnification revealed that the microcapsules were
between 1.24μm to 2.29 μm. Increase in gum percent resulted in increase in size of
microcapsule.
Finish was applied to woven and knitted textiles using pad-dry-cure method with
curing at 35° to 40°C. The antibacterial activity was evaluated by a modified qualitative
test method AATCC-147, 2004 for the growth inhibition and AATCC-30, 2004, for anti
fungal activity against both Staphylococcus aureus and Escherichia coli. Antibacterial bacterial activity was found to be zero in both untreated woven and
knitted fabrics. Among the treated fabrics, periwinkle with all gum sources showed higher
Zoi against E.coli over S. aureus in both woven and knitted fabrics. Fabrics finished with
microcapsules with 5 per cent gum as wall material had high Zoi than their counter parts.
Treated knitted samples performed better than woven samples for all sources.
Microcapsules made from sources CS and PG with bagawathi gum at 10 per cent
concentrations showed least Zoi on both the fabric types.
There was a slight decrease in antibacterial activity of all sources and
concentrations after the first wash.
Improved antibacterial activity was found in woven and knitted samples after third
wash at 5 per cent concentration with PW+GA and PW+BG, and decrease in combination
of CS+GG.
A decreased antibacterial activity was observed in both woven and knitted samples
against both organisms after fifth wash compared to first and third wash.
All plant sources with 5 per cent GA were found to possess good Zoi among all
treatments in woven samples against both organisms even after ten washes.
The results of antifungal activity indicated that there was minimal fungal growth
for few sources while samples washed for five and ten cycles did not support any fungal
growth.
Analysis of geometric parameters of fabrics showed a slight increase in yarn count,
fabric count, fabric weight in few samples and decrease of thickness in majority of
samples.
These findings indicated that periwinkle in both concentration with all three wall
materials exhibited better antibacterial activity among all.
 
Date 2016-06-01T14:13:26Z
2016-06-01T14:13:26Z
2011
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/66546
 
Language en
 
Relation D8922;
 
Format application/pdf
 
Publisher ACHARYA N.G. RANGA AGRICULTURAL UNIVERSITY