Producing the yarn from nanofibres is considered as one of the great potentials in electrospinning. These. This research has used PVA and PLLA in electrospinning of nanofibres and yarn production. In first approach, electrospinning behaviour of PVA is assessed by using 3 different solvents namely, distilled water, distilled water/DMF and Acetic acid/distilled water. In the second approach, porous fibres of PLLA are electrospun and converted to yarn using two opposite jets (Solvent: DCM , Relative humidity: 55% ± 5 ). Study is carried out on the morphology of porous fibres and sample yarns. Mechanical properties of yarns are evaluated as well. In the third approach, interaction between the electrospinning parameters and porosity of PLLA fibres is studied. Since the porosity of fibres affects the wet ability of these fibres, as the fourth approach, capillary rise i the various porous PLLA fibres is studied. LLA is a hydrophobic polymer and in fifth approach this hydrophilicity is modified by introducing the PVA as hydrophilic polymer. Hybrid yarns of PLLA/PVA are electrospun in this concern and electrospinning parameters are optimized. Mechanical properties of various hybrid yarns such as tenacity, breaking elongation, work of rupture and elastic modulus is studied as well. Moisture regain of these hybrid yarns is assessed to reveal the effect of PVA content in hybrid yarns. Key words: mechanical properties of nanofibre yarns, porosity, capillary, PVA, PLLA, hybrid nanofibre yarn, moisture regai
