Fabrication of highly proton-conductive chitosan whole-bio-membrane materials functionalized with adenine and adenosine monophosphate

Abstract

A successful strategy to prepare novel proton-conductive chitosan membrane biomaterials functionalized with adenine and adenosine monophosphate via a one-pot grafting procedure.

Preparation of Novel Biodegradable Cellulose Nanocrystal Proton Exchange Membranes for Direct Methanol Fuel-Cell Applications

“…The elemental composition of the films was measured using a vario EL cube elemental analyzer (PE8300, PE). The degree of substitution (DS) was calculated as per eqs – …”

“…Methanol permeability was tested using a diffusion system with two pools. 900 mL of a 10 mol·L –1 methanol aqueous solution was added to pool A, and 900 mL of DI water was added to pool B . The film was sandwiched between the pools of A and B, and the effective diffusion area of the film was 25 cm 2 .…”

Toward the Next Generation of Sustainable Membranes from Green Chemistry Principles

“…It can also be used as membrane materials for biomedical applications, pervaporation, water treatment, gas separation and proton exchange of fuel cells, supercapacitors, and solid-state batteries. 120 CS-based membranes in water treatment have been mainly applied with two objectives: (i) adsorptive membranes for phase transfer of contaminants from the aqueous solution, and (ii) composite NF/RO/FO membranes for surface separation with high solute rejection. CS-based membranes have an interesting ability to adsorb contaminants, especially heavy metals, because the amino and hydroxyl groups of CS can serve as coordination sites.…”

“…CS is nontoxic and biodegradable, and it has suitable biocompatibility and low cost. It can also be used as membrane materials for biomedical applications, pervaporation, water treatment, gas separation and proton exchange of fuel cells, supercapacitors, and solid-state batteries …”

Freezing-Tolerant Hydrogel Composed of Sulfonated Chitosan and Poly(vinyl alcohol) Featuring Excellent Stretchability and High Proton Conduction

“…The studies revealed that the double-network − hydrogels with the interpenetrating polymer networks are more superior to those composed of single-component polymer networks in strength and toughness, − and a double-network hydrogel is formed by two different types of polymers, in which one has relatively long and stretchable polymer strands and another possesses relatively short and stiff polymer strands and exhibits the advantage that the flexible polymer network maintains the global integrity, yet the stiff network fracture is sacrificed to dissipate energy as the hydrogel shows tensile deformation, and the synergistic effect between two different polymers much improves the mechanical performance of double networks . Chitosan (CS), a polymer, is easily modified by acidic functional groups to afford an acidic polymer, for example, sulfonated chitosan (CS-SO 3 H), and the derivatives of chitosan functionalized by acidic functional groups show high proton conduction. − With respect to PVA having relatively long and stretchable polymer strands, CS possesses relatively short and stiff polymer strands, and it may form a double-network hydrogel by mixing PVA with CS-SO 3 H.…”