PVP-capped silver nanoparticles as catalysts for polymerization of alkylsilanes to siloxane composite microspheres

Effect of stabilizer type on the physicochemical properties of poly(acrylic acid)/silver nanocomposites for biomedical applications

“…The possibility of their application in the production of biosensors [3,4] catalysts [5] and ion-selective electrodes [6], surface-enhanced Raman scattering substrates [7] contributes to the high interest in these systems, also as materials for biomedical purposes [8]. The addition of silver nanoparticles to properly selected polymer matrix allows to give the whole nanocomposite biocidal properties.…”

Polymerization of Alkylsilanes on ZIF-8 to Hierarchical Siloxane Microspheres and Microflowers

“…Furthermore, the ZIF-8-polymer composite products with hierarchical structures had a water contact angle of 107.9° ( Figure S9b) which is higher than that of ZIF-8 (82.5°, Figure S9a). The polymerization composites Although the exact mechanism for the formation of hierarchical siloxane structures is not clear, based on the literature [18][19][20][21][22] and the results in the current study, we propose that the monomer molecule of ODS assembled and polymerized, and finally formed the novel hierarchical structures. The ZIF-8 nanocrystals catalyzed the polymerization reaction and oriented the growth of the siloxane polymers.…”

“…The reactions were firstly carried out at 90 °C as in our previous studies [19][20][21]. A significant change in intensity at the wavenumber of 2150 cm −1 was observed in the FT-IR spectra owing to the stretching peak of Si-H (Figure 1c), using 10 mg ZIF-8 for 4 h. The Si-H bonds' absorption of the obtained product became weaker than that of pure C18H37SiH3.…”

“…The route for polymerizing octadecylsilane catalyzed by gold nanoparticles was similar to that described by references [18][19][20][21]. The polymerizations of octadecylsilane in this work were carried out in a round-bottom flask under magnetic stirring.…”

“…There have been a few reports on the preparation of siloxanes with hybrid nano-and micro-structures by the aggregation of saturated alkylsilanes (C 18 H 37 SiH 3 , ODS), originally using noble metal nanoparticles as catalysts [18][19][20][21][22]. Ternary chalcogenide compounds (AgBiS 2 ) and polyvinyl pyrrolidone-capped silver nanoparticles have also been confirmed to be able to catalyze the polymerization of alkylsilanes to form polysiloxanes [19][20][21] in our previous works. In addition, a noble metal salt, as a homogeneous catalyst, was also used to synthesize siloxane nanowires and hybrid metal core-siloxane shell nanoparticles [22].…”