Low-resistance films of polyimides with impregnated copper sulfide

Abstract

Surface modification of polyimides has been used to obtain better interaction with an inorganic material. Copper sulfide incorporation onto the surface of commercial Kapton polyimide showed that treatment with base was necessary for adherence of the copper sulfide to the polymeric matrix. The optimized conditions for composite preparation, obtained by response surface methodology, was pH 1.4 at 80°C for 3.67 h. Using these conditions, we obtained electrical resistance as low as 1.0 ohm for CuS\Kapton composites. These optimized conditions were used to prepare other low-resistance polyimide composites. The resulting composites were analyzed by photoelectron spectroscopy. The presence of S(2p) and Cu(2p) peaks demonstrated the incorporation of copper sulfide onto the polyimide surface. Scanning electron microphotographs and the images from atomic force microscopy showed a homogeneous CuS distribution in all composites.

Ag2S deposited on oxidized polypropylene as composite material for solar light absorption

“…One of the polypropylene surface modification methods is its oxidation. The oxidation of isotactic polypropylene (iPP) in solid phase has been done via reactions with ozone, ␥initiated corona method and UV ray or with chemical oxidizing mixture [19,[23][24][25][26][27][28][29][30]. The oxidation of iPP leads to the formation of oxygen-containing surface functional groups, which greatly affect the surface polarity and the adhesion properties of the polymer toward the metal chalcogenide deposition.…”

Chemical and biological sensing with nanocomposites prepared from nanostructured copper sulfides

“…The products are dark brown or black solid Cu x S precipitates of various morphologies such as nano-sized rods and spheres (figure 1). Next, the resulting nanocomposites of Cu x S are impregnated onto the surfaces of different polymers including textiles [23], poly(viny1 alcohol) (PVA) and poly(2-cyano-1,3-phenylene oxide), polyethylene terephthalate [24], commercial Kapton@polyimide [25], poly(aniline-co-m-chloroaniline) [26], cornstarch [27], and amylose [28]. The advantages of the hydro/solvothermal method over other methods are the high crystallinity and the unchanged composition of the Cu x S phases.…”

The Heat, Plasma, and Laser Treatments Characteristics of Hydroxyapatite Coatings

“…Many treatment processes have been studied to improve the quality of coatings on substrate, including heat, plasma and ion beam treatment processes. The effect of these operations may alter the surface chemical structure or affect the roughness of the coating [14]. Non melt laser treatment and heat treatment are commonly used for surface modification of materials with the aim of enhancing the properties of thin films.…”