Wound Dressing Lab Report

2.3.7. Antibacterial activity on wound dressing:
Two samples of wound dressing was treated with micro encapsulated extract of the pelargonium hortorum with sodium alginate, then one of the samples is post treated with citric acid. Each sample was independently examined towards antibacterial activity using two types of micro-organisms (Escherichia coli AATCC 2666 gram negative (ve) and Staphylococcus aureus AATCC 6538 gram positive (+ve)). The result was taken after 4 hours, 8 hours and after 24 hours.
2.4. Physico mechanical measurments:
2.4.1. Tensile strength and elongation:
The tensile strength and elongation of treated fabrics were measured according to ASTM procedure D/3822 (14).
2.4.2. Stiffness test:
The stiffness of the treated fabrics was measured according to ASTM procedure D/1388(9).
Roughness test method:
Surface roughness of treated fabrics was measured at N.R.C. labs using surface roughness measuring instruments (Surfcoder SE 1700) manufactured by Kosaka laboratory Ltd. Japan(16).
2.5. Fabric printing:
To identify the effect of the treatment on the colour strength, the fabric that microencapsulated with sod. Alginate and post treated with citric acid was printed by the following recipe: 880 g/kg water, 20 g/kg thickener, 80 g/kg binder, and 20 g/kg pigment. After printing, the fabric was dried at ambient conditions, then fixed by pressing at150° C for 50 seconds.
2.6. whiteness & Colour strength (K/S) measurment : The differences in fabric whiteness after treatment and color strength (K/S) of the printed fabric were measured using Hunter lab spectrophotometer. Miniscan Diffuse SAV, Stdz Mode: