Synthesis and Assessment of AMPS-Based Copolymers Prepared via Electron-Beam Irradiation for Ionic Conductive Hydrogels

Abstract

In this study, ionic conductive hydrogels were prepared with 2-acrylamido-2-methyl-1-propanesulfonic acid (AMPS). Acrylic acid (AA), acrylamide (AAm), and 2-hydroxyethyl acrylate (HEA) were used as comonomers to complement the adhesion properties and ion conductivity of AMPS hydrogels. Hydrogels were prepared by irradiating a 20 kGy dose of E-beam to the aqueous monomer solution. With the E-beam irradiation, the polymer chain growth and network formation simultaneously proceeded to form a three-dimensional network. The preferred reaction was determined by the type of comonomer, and the structure of the hydrogel was changed accordingly. When AA or AAm was used as a comonomer, polymer growth and crosslinking proceeded together, so a hydrogel with increased peel strength and tensile strength could be prepared. In particular, in the case of AA, it was possible to prepare a hydrogel with improved adhesion without sacrificing ionic conductivity. When the molar ratio of AA to AMPS was 3.18, the 90° peel strength of AMPS hydrogel increased from 171 to 428 gf/25 mm, and ionic conductivity slightly decreased, from 0.93 to 0.84 S/m. By copolymerisation with HEA, polymer growth was preferred compared with chain crosslinking, and a hydrogel with lower peel strength, swelling ratio, and ionic conductivity than the pristine AMPS hydrogel was obtained.

Synthesis of Gallic Acid-Loaded Chitosan-Grafted-2-Acrylamido-2-Methylpropane Sulfonic Acid Hydrogels for Oral Controlled Drug Delivery: In Vitro Biodegradation, Antioxidant, and Antibacterial Effects

“…This amide monomer displays strong resistance to salts and improved stability in terms of its resistance to hydrolysis owing to its sulfonic functional group. The sulfonic groups in AMPS allow it to be crosslinked with natural polymers to form networks with desired properties [ 16 ].…”

Ion engines in hydrogels boosting hydrovoltaic electricity generation

“…Pre-polymerised hot solutions of different contents of 2-acrylamido-2-methyl-1-propanesulfonic acid sodium salt solution (NaAMPS) mixed with acrylamide (AAM) are successively poured into the mould, where NaAMPS provides ionisation groups of –SO 3 Na 20 and AAM functions for improving cohesive energy and making the internal structure compact. 21,22 These solutions copolymerise to form an IGC gradient. Setting a high IGC at the water inlet provides high-content hydrated ions, resulting in the expected alignment of an ion gradient and water transport in the same direction.…”

“…AAM is for improving cohesive energy and making the internal structure compact. 21,22 MBAA acts as a crosslinking agent for forming cross-linked networks between the components inside the hydrogel. 56,57 UV-I acts as a UV initiator.…”

Carbopol Based Hydrogels for ITOPRIDE Hydrochloride Delivery; Synthesis, Characterization and Comparative Assessment with Various Monomers

“…AMPS (2-Acrylamido-2-methylpropane sulfonic acid) (Figure 1a) is used as a monomer in hydrogel formulations [17]. In AMPS ionizable sulfonic-acid group is present which respond to wide pH range [18,19]. Methacrylic acid (MAA) (Figure 1c) exhibited pH responsive behavior and has the ability to swell in basic pH and collapse in acidic pH [20].…”