Novel hydrogels containing Nafion and poly(ethylene oxide) based block copolymers

Abstract

We present a novel family of biocompatible hydrogels containing Nafion and poly(ethylene oxide) based block copolymers. In aqueous environment, thermodynamically stable ionomercopolymer complexes are formed, as evident by light scattering and quartz crystal microbalance experiments. Moreover, incorporation of Nafion dramatically modifies the phase behaviour and the rheological properties of copolymer hydrogels. The hybrid systems not only undergo sharp and thermally reversible sol-gel transitions below the body temperature, thus retaining their injectable nature, but they also generate mechanically robust hydrogels. Moreover, ibuprofen was continuously released over a period of 26 days for the Nafion/Pluronic hydrogel, compared to only 3 days for the Nafion-free system. The hybrid gels are promising candidates for 3D-bioprinting and controlled drug release applications.

Characterization of Sodium and Potassium Nitrate Contaminated Polyaniline-Poly (Ethylene Oxide) Composites Synthesized via Facile Solution Casting Technique

“…The nitrate ions of sodium and potassium have great impact on the viscosity and tend to minimize this effect and finally become aligned which no further change in viscosity occurs. The same trend was reported by Volk and his co-workers [31].…”

“…Similarly, the particle size, shape and particle distribution have greater effect on the viscosity of the polymeric composite. As the cationic and ionic size of KNO 3 and NaNO 3 are small, so these ions move freely without facing any hindrance [31]. It can be seen from our results that pure blend PANI-PEO has lower viscosity at all temperatures.…”

Antimicrobial coatings based on amine-terminated graphene oxide and Nafion with remarkable thermal resistance

“…4. In previous studies it has been demonstrated that complexation of Nafion with peptides, 34 polymers 30,35,36 and metal–organic frameworks 37 is driven by electrostatic interactions, hydrogen bonding and the hydrophobic effect.…”

Layer by Layer Antimicrobial Coatings Based on Nafion, Lysozyme, and Chitosan

“…Upon water exposure, Nafion’s surface is reorganised with the sulphonic groups to be turned into the aqueous phase, a mechanism that gives rise to a large water contact angle hysteresis [24]. Owing to its amphiphilic nature Nafion has been shown to bind not only with charged polymers such as poly (oxyethylene) [25] and poly (oxypropylene) based diamines [26], but also with non-ionic surfactants via hydrogen bonding, hydrophobic interactions [27,28,29].…”