01632nas a2200133   4500008004100000245007300041210006900114260000800183520113000191100002501321700002301346700002501369856010401394       2017                        eng d00aFlexible epoxy novolac coatings: use of cardanol-based flexibilizers0 aFlexible epoxy novolac coatings use of cardanolbased flexibilize  cFEB3 aFlexible epoxy novolac coatings were developed by reacting an epoxy novolac resin, Poly[(phenylglycidyl ether)-co-formaldehyde] (PPGEF) with an amine curing agent, 4,4′-diamino-3,3′-dimethyldicyclohexyl methane (BMCHA), cardanol based reactive diluent (Cardolite NC-513) and two different cardanol-based flexibilizers (Cardolite NC-514 and Cardolite NC-547). The flexibilizer content was varied from 5 to 10% by weight of the resin. These resins were coated onto the stainless steel panels and tested for their gloss, cross-hatch adhesion, falling weight impact resistance, flexibility, abrasion, scratch hardness, solvent scrub resistance, and chemical resistance. The thermo-mechanical properties of these coatings were determined by TGA, DSC, DMTA, and tensile strength measurements. The cryofractured specimens were subjected to SEM analysis. The influence of structural differences of two flexibilizers on the coating properties was investigated. These coatings exhibited excellent properties and have great potential in industrial applications. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 44920.1 aGour, Rajeshwari, S.1 aRaut, Kundalik, G.1 aBadiger, Manohar, V.  uhttps://library.ncl.res.in/content/flexible-epoxy-novolac-coatings-use-cardanol-based-flexibilizers02027nas a2200193   4500008004100000022001400041245011000055210006900165260000800234300002600242490000800268520132900276653001501605653002501620653002101645100002001666700002501686856012201711       2019                        eng d  a0021-899500aFlocculation of kaolin from aqueous suspension using low dosages of acrylamide-based cationic flocculants0 aFlocculation of kaolin from aqueous suspension using low dosages  cAPR  aArticle Number: 472860 v1363 a<p>Flocculation of kaolin from aqueous streams has become very important in view of its wide range of applications. In this work, cationic flocculants based on copolymers of acrylamide (AM) and 3-acrylamidopropyltrimethylammonium chloride (APTMAC) were synthesized with two different mole ratios of monomers, 80 mol % of AM (CP-8020) and 40 mol % of AM (CP-4060). The chemical structures of copolymers were confirmed by H-1 and carbon-13 nuclear magnetic resonance (C-13 NMR) spectroscopy. The molecular weight (MW) and zeta potential of the copolymers were determined. High MW was obtained for copolymer with high content of AM (CP-8020) and high zeta potential was observed for copolymer with high content of APTMAC (CP-4060). Flocculation of kaolin suspension was performed using both CP-8020 and CP-4060 and the flocculation was correlated to the zeta potential and MW of the copolymers. The optimum dosages of flocculants were determined. The mechanism of flocculation was discussed in terms of charge neutralization and bridging. The flocs of kaolin were characterized in terms of moisture content and size. To the best of our knowledge, this copolymer system was used for the first time for kaolin flocculation and found out to be efficient. (c) 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47286.</p>10acopolymers10ahydrophilic polymers10apolyelectrolytes1 aSuresha, P., R.1 aBadiger, Manohar, V.  uhttps://library.ncl.res.in/content/flocculation-kaolin-aqueous-suspension-using-low-dosages-acrylamide-based-cationic02976nas a2200277   4500008004100000022001400041245018300055210006900238260000800307300001400315490000600329520187600335653004902211653001302260653005802273653003502331653003602366100001802402700002702420700002702447700002102474700002602495700002502521700002402546856012802570       2024                        eng d  a2574-096200aF-doped nickel cobalt oxide-carbon composite electrocatalysts paired with mechanically robust anion-conducting chitosan membranes for flexible and rechargeable zinc-air batteries0 aFdoped nickel cobalt oxidecarbon composite electrocatalysts pair  cAUG  a7037-70540 v73 a<p>
	High-performing, cost-effective electrocatalysts and anion-conducting polymer electrolyte membranes are essential for realizing commercially affordable zinc-air batteries (ZABs). In this context, the present work deals with the development of a bifunctional electrocatalyst and an anion-exchange quasi-solid-state electrolyte membrane (based on quaternary ammonium group-grafted chitosan) for demonstrating flexible and rechargeable ZABs. The electrocatalyst composed of NiCoO2 nanoparticles supported on a carbon framework showcased substantial advancements in its ability to catalyze both oxygen reduction and evolution reactions (ORR and OER) due to the heteroatom doping by fluorine. For instance, the optimized electrocatalyst (F-NCO-ADC-600) exhibited an onset potential of 0.96 V vs RHE with a half-wave potential of 0.83 V vs RHE for ORR, a comparable performance with the state-of-the-art Pt/C (1.0 and 0.86 V vs RHE, respectively). On a similar note, the same catalyst also displayed an overpotential of 340 mV vs RHE for OER at a current density of 20 mA cm(-2), close to that of a standard RuO2 catalyst (337 mV vs RHE). In the context of polymer electrolytes, the quaternary ammonium-group-grafted chitosan membrane depicted superior ionic conductivity, liquid electrolyte uptake, and mechanical properties, thereby proving to be an efficient anion-conducting polymer electrolyte membrane. The realistic application of the developed electrocatalyst and the polymer electrolyte membrane is demonstrated in the ZAB prototypes. The assembled rechargeable ZAB (RZAB) delivered a power density of 207 mW cm(-2) and maintained high-rate capability and cycling stability, notably in a flexible configuration (f-RZABs). Thus, this work provides a strategy for the rational design of anion-exchange membranes and bifunctional electrocatalysts for f-RZABs.</p>
10aanion-conducting polymer electrolytemembrane10aF-doping10aflexible and rechargeable zinc-air batteries(f-RZABs)10aoxygen evolution reaction(OER)10aoxygen reduction reaction (ORR)1 aKurian, Maria1 aRanganath, Suresha, P.1 aVijayakumar, Vidyanand1 aSivadasan, Sneha1 aKurian, Rachna, Maria1 aBadiger, Manohar, V.1 aKurungot, Sreekumar  uhttps://library.ncl.res.in/content/f-doped-nickel-cobalt-oxide-carbon-composite-electrocatalysts-paired-mechanically-robust