Study On Preparation And Performance Of Polyaniline/Polyurethane Composite Conductive Coatings

Researchers in many countries devoted themselves to the study of environment friendly coatings in order to replace toxic coatings. Waterborne conductive polymer coatings have attracted much attention because of its non-toxic, non-pollution. The work is to provide scientific and experimental basis for waterborne conductive coatings. Synthesizing of conductive polymer with high conductivity and dispersing well in matrix resin are the key of the work.In this paper, HC1 dopped PANI was synthesized via chemical oxidative polymerization, searched the optimum conditions, and then studied properties of CNT/PANI composites prepared by in-situ polymerizaton. The main results are summarized as follows:(1) With An:APS’s incresing, grain size and productive rate of PANI decreases. PANI synthesized with differernt An:APS and [An] performs similar. The better PANI dopped with when the temperature is lower and acid concentration is higher.The optimum conditions of synthesizing PANI is 1mol·L-1Hl,13℃, [An]=0.3-0.4mol·L-1, An:APS=0.8～0.9.(2)Polyaniline in PANI/CNT composites is emeraldine dopped by HC1, PANI and CNT compound well, structure regularity of PANI/CNT improved obviously, but remain the same.(3)Coatings added with PANI and PANI/CNT performs good impact resistance, and its conductive performance is improved,but the adhesion and surface morphology of the coatings is not ideal.(4)Coatings added with conductive powder performs higher current density than the ordinary conductive coating. Overall,coatings added with 1.0%PANI,0.6%PANI performs certain electrical properties,and better anti-corrosion properties.