Poly(4-vinylaniline)-Polyaniline Bilayer-Modified Stainless Steels for the Mitigation of Biocorrosion by Sulfate-Reducing Bacteria (SRB) in Seawater

Abstract

A novel strategy by combination of surface-initiated atom transfer radical polymerization (ATRP) and in situ chemical oxidative graft polymerization was employed to tether stainless steel (SS) with poly(4-vinylaniline)-polyaniline (PVAn-PANI) bilayer coatings for mitigating biocorrosion by sulfate-reducing bacteria (SRB) in seawater. A trichlorosilane coupling agent was first immobilized on the SS surfaces to provide sulfonyl halide groups for surface-initiated ATRP of 4-VAn. A subsequent grafting of PANI onto the PVAn-grafted surface was accomplished by in situ chemical oxidative graft polymerization of aniline. The PVAn-PANI bilayer coatings were finally quaternized by hexylbromide to generate biocidal functionality. The sosynthesized SS surface was found to significantly reduce bacterial adhesion and biofilm formation. Electrochemical results revealed that the PVAn-PANI modified SS surface exhibited high resistance to biocorrosion by SRB. With the inherent anticorrosion capability and antibacterial properties of quaternized PVAn-PANI bilayers, the functionalized SS substrates are potentially useful to steel-based equipment under harsh marine environments.

Poly(4-vinylaniline)/polyaniline bilayer functionalized bacterial cellulose membranes as bioelectronics interfaces

“…It is very promising to see that almost 90% of cells were viable on BC/PVAN/PANI composites. Further, an observable higher number of cells on BC/PVAN composites indicates PVAN provides good support for cell proliferation, which could be attributable to the improved hydrophilic properties (Yuan et al, 2012). This suggests that the composites, in particular, PVAN/PANI functionalized BC with enhanced conductivity do not cause any cytotoxicity.…”

“…As one of the most studied ICPs, polyaniline (PANI) is easily synthesized and possesses a high environmental stability, with simple doping/dedoping chemistry (Huanhuan Wang et al, 2012). On account of this finding, it has been invariably utilized as electrical conductors (Yan, Sada, & Toshima, 2002), batteries (L. Hu, Ren, Yang, & Xu, 2014), sensors (Langer et al, 2004), actuators (Smela, Lu, & Mattes, 2005), electromagnetic shielding (Gupta, Singh, Mathur, & Dhakate, 2014), antistatic coatings (Soto-Oviedo, Araújo, Faez, Rezende, & De Paoli, 2006), corrosion protection (Mirmohseni & Oladegaragoze, 2000;Yuan et al, 2012), and electro-optic and electrochromic devices (Shi et al, 2012). However, pure PANI is typically obtained as an intractable powder that largely hinders its uses in order to fully exploit its functional potentials (Valentová & Stejskal, 2010).…”

“…PVAN has been previously exploited as a precursor of aniline polymerization in anticorrosive metal coatings (Yuan et al, 2012), surface modification of poly(tetrafluoroethylene) (L. Y. Ji, Kang, Neoh, & Tan, 1999) and to assist in the production of conductive hollow nanospheres (G.…”

Biological corrosion inhibition of steel alloy by pani nano fiber

“…The biocorrosion inhibition level of PANI-PVA matrix was analyzed using sulphate reducing Desulphovibrio sp. Yuan et al (2012) also observed that PVAn-PANI bilayer coating is having good corrosion inhibition against SRB. The corrosion rate of uncoated sterile and SRB containing steel coupon were analyzed in various days (Table 2 and Figure 2) and the corrosion rate were ame study w easing corros 4).…”

The Control of Microbiological Problems∗∗Some excerpts taken from Bajpai P (2012). Biotechnology for Pulp and Paper Processing with kind permission from Springer Science1Business Media.

“…Comparing the antibacterial activity of chitosan and its derivatives indicated that chitosan (compound II) was more effective than its derivatives against several bacteria: C. albicans, E. coli, E. faecalis, and S. aureus. Yuan et al (2012) attempted to reduce biocorrosion by sulfate-reducing bacteria. This approach involved a combination of surface-initiated atom transfer radical polymerization and in situ chemical oxidative graft polymerization techniques.…”