Usage of quartz crystal microbalance technique to study the polyaniline films formation in the presence of p-phenylenediamine

Colloidal dispersions of conducting copolymers of aniline and p-phenylenediamine for films with enhanced conductometric sensitivity to temperature

“…12,41 With increasing p-PDA fed as the monomer, the copolymerization products showed reduced absorption intensity of the ''tail'' around 750 nm, whereas an additional band around 300 nm belonging to the p-p* transition of benzenoid rings became more evident, indicating that more p-PDA units were involved in the polymer chains. 10 When the mole percentage of p-PDA was 50%, i.e. equal mole of p-PDA and aniline was used, the UV-vis spectrum of the polymerization products almost totally lost the characteristic of polaron transition, and a broad band appeared in the region of 500-650 nm instead of a tail extending beyond 750 nm, which is close to the spectrum of neat PPDA.…”

“…On the other hand, a small amount of p-PDA introduced into the aniline polymerization system accelerates the polymerization course, 10,11 and promotes the formation of one-dimensional (1-D) polyaniline nanofibers with a remarkably increased aspect ratio as well as the yield. For example, it has been widely reported that 1-D polyaniline nanofibers with high aspect ratios were obtained by adding a small amount of p-PDA to the reaction mixture.…”

Copolymerization of Aniline, Melamine and p‐Phenylenediamine for Enhanced Pseudocapacitance Hydrogel Supercapacitor Electrodes

“…This explains why the PPDA 2 peaks at 15.2°, 20.2°, and 25.4° displayed the same intensities as PANI. [ 34 ] The weak peaks ([011], [020], and [200]) of PD 2 M 4 are justified by the interconnected crosslinked structure between the polymer chains, which were observed in the SEM micrographs of PD 2 M 4 (Figure 1, a1 and a2), thus impairing the degree of crystallinity. [ 35 ] The results from the XRD examination confirmed the crosslinking reaction in PD 2 M 4 .…”

Design and Testing of a Bending‐Resistant Transparent Nanocoating for Optoacoustic Cochlear Implants

“…As a first step in this exploratory study, the PEO44‐TES coating was deposited on PDMS surfaces to evaluate features such as optical transparency and in vitro antifouling performance towards single protein solutions, fibroblasts and bacteria. The antifouling features, in particular, were studied by Quartz Crystal Microbalance with Dissipation monitoring (QCM‐D), which is a useful method to evaluate adsorption phenomena on polymer surfaces, including those involving biological molecules . Our results show that the proposed coating has high transparency and very good antifouling properties, which are mostly maintained even upon application of significant bending stress.…”