The effective site-selective interaction between the π-bonds in the aromatic rings of the polyaniline and the graphitic structure of multiwall carbon nanotubes would strongly facilitate the charge-transfer reaction between the two components. We adopted multiwall carbon nanotubes (MWNTs) with minimal defects as templates and facilely fabricated carbon nanotube−polyaniline nanocomposites with uniform core−shell structures by ultrasonic assisted in situ polymerization. By varying the ratio of aniline monomers and carbon nanotubes, the thickness of polyaniline layers can be effectively controlled. The results indicated that the presence of carbon nanotubes with minimized defects induced the formation of a more planar conformation of polyaniline even when a high weight percent of aniline was loaded. As a result, macroscopically, great improvements in the electrical and electrochemical properties of the resulting nanocomposites were observed.

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PTFE/aramid woven fiber liners were modified by acrylamide, phosphate ester coupling agent, respectively. The effects of the modified liner on the friction coefficient, the wear loss and the friction temperature of self-lubricating spherical plain bearings were investigated by using self-made compound swinging type friction and wear testing machine. With Instron 5944 electronic universal material testing machine, the bonding property was analyzed .The results show that the bonding property of the modified liners have a greater degree of improvement and the friction coefficient, the wear loss and the friction temperature of the bearing were all decreased. In the three kinds of liners, the bonding properties and tribological properties of spherical plain bearing with modified by acrylamide liners were the best.

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