Preparation and properties of PTT /wool /PANI composite conductive yarns based on in-situ polymerization

A novel method based on in-situ polymerization was used to prepare PTT /wool /PANI composed conductive yarns continuously. The effect of concentration of reaction mixture on the surface morphology,chemical construction,electrical conductivity,and mechanical property of composite yarns were studied. The results indicated that,the content of PANI on the surface of yarns increased with the increase of the concentration of the reaction mixture. The FI-TR curves indicated that the composite yarn was a blending system of PTT fiber,wool fiber and PANI. The electrical conductivity increased with the increase of the concentration of the reaction mixture,and the electrical conductivity of composite yarn can be up to 1. 08 × 10- 2S /cm. The breaking strength,breaking elongation and initial modulus of the yarn increased after conductive processing,while the yield strength and elongation decreased.