Abstract
Poly(acrylic acid), PAA, has been mixed in solution with silver nanoparticles, obtained by chemical reduction of silver nitrate. Two different sulfur-containing organic compounds have been used as stabilizers of Ag nanoparticles: mercaptosuccinic acid (MSA) and 3-mercaptopropionic acid (MPA). The formation of Ag nanoparticles has been monitored by UV–Vis spectroscopy. The morphology and composition of obtained nanomaterials has been studied by electron microscopy techniques (SEM/EDX and HR-TEM). Nanomechanical properties of nanocomposites (adhesion and nanohardness) have been investigated by Atomic Force Microscopy (AFM). Thermal stability has been determined using thermogravimetric analysis. The exposure of specimens to UV radiation allowed to observe the changes in the nanoparticle structure and to estimate nanocomposite photostability. MSA has proved to be a better stabilizer of Ag nanoparticles immediately after the synthesis, when MPA provides better storage stability. MPA has allowed for the creation of nanoparticles using mixed reduction (chemical/photochemical) of AgNO3. It has been found that the nanocomposite materials are stable for 12 months of storage in solution and in solid form.
Highlights
Polymer nanocomposites containing noble metal nanoparticles are valuable materials for a wide variety of usage [1, 2]
Two different sulfurcontaining organic compounds have been used as stabilizers of Ag nanoparticles: mercaptosuccinic acid (MSA) and 3-mercaptopropionic acid (MPA)
The aim of this work is to study the properties of Poly(acrylic acid) (PAA) nanocomposites containing silver nanoparticles (AgNPs) stabilized by two different sulfur-containing compounds: mercaptosuccinic acid (MSA) and 3-mercaptopropionic acid (MPA)
Summary
Polymer nanocomposites containing noble metal nanoparticles are valuable materials for a wide variety of usage [1, 2]. UV irradiation has the opposite effect on the nanomechanical properties of pure PAA (dominant crosslinking) and nanocomposites (prevailing degradation) The advantage of these systems from the point of view of biomedical applications is the presence of carboxylic groups that are capable of reacting with other functional moieties, e.g., amino groups present in proteins. It may be a potential material for the immobilization of enzymes or other catalysts, it can play an important role in removing impurities by physical adsorption. They are used as dressings and hygienic materials, drug carriers, matrix for cell proliferation in tissue engineering, smart membranes sensitive to pH, chemical sensors and many others
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