Structural, optical, and aging studies of biocompatible PVC-PVP blend films

Abstract

<jats:title>Abstract</jats:title> <jats:p>In the present communication, an attempt is made to prepare and study the structural, optical, and aging properties of polyvinylchloride (PVC)-polyvinylpyrrolidone (PVP) blend films for their probable applications as biodegradable/biocompatible materials in biomedical and optoelectronics fields. The surface properties such as contact angles and surface free energies of films are measured to investigate the interaction of polymer films with water. These measurements reveal that on increasing the weight percentage concentration of PVP in PVC, the hydrophilicity of the films increases. The surface free energy was found to increase with increasing concentration of PVP in PVC, which indicates that these films tend to adsorb more moisture from the atmosphere and, thereby, will have a tendency to age faster. The Fourier transform infra-red spectroscopy (FTIR) spectra of blend films indicate a significant change in the intermolecular/intramolecular interactions taking place. The UV-visible (VIS) absorption spectra clearly reveal that blend films absorb UV radiations appreciably compared to visible light. The optical band gap, Urbach energy, and the carbonaceous cluster size were estimated from the absorption spectra.</jats:p>

Synthesis, Characterization and Some Biological Properties of PVA/PVP/PN Hydrogel Nanocomposites: Antibacterial and Biocompatibility

“…It obviously demonstrates that PVA is a kind of hydrophilic polymer with polar hydroxyl groups on the molecular chain and shows water droplet contact angle of 61-79⁰, as shown in the literature [24]. The contact angle of PVP was indicated in the literature as 44⁰ and was a hydrophilic polymer [25]. There was no PVA/PVP mixture in the literature.…”

Investigation of characteristic and performance of polyvinyl chloride ultrafiltration membranes modified with silica‐oriented multi walled carbon nanotubes

“…Figure 10 shows the characteristic peaks of the saturated C H asymmetric stretching of CH 2 for PVC chains appearing at 2,970 cm −1 with a 1,430 cm −1 absorption for both pure PVC and PVC/Si-MWCNT nanocomposite membranes. [50] The observed peak at 1,252 cm −1 is attributed to C N vibration and the 689 cm −1 peak is attributed to C Cl bond stretching in the CHCl group. [50,51] The absorption peak at 3,410 cm −1 was attributed to the O H vibration from the intermolecular hydrogen bonds.…”

“…[50] The observed peak at 1,252 cm −1 is attributed to C N vibration and the 689 cm −1 peak is attributed to C Cl bond stretching in the CHCl group. [50,51] The absorption peak at 3,410 cm −1 was attributed to the O H vibration from the intermolecular hydrogen bonds. [50,52] Inspection of the peak intensity of the band at 1,184 cm −1 and 836 cm −1 indicated a progressive occupation of silica in the accessible sites on the membrane surface with the addition of Si-MWCNT.…”

“…[50,51] The absorption peak at 3,410 cm −1 was attributed to the O H vibration from the intermolecular hydrogen bonds. [50,52] Inspection of the peak intensity of the band at 1,184 cm −1 and 836 cm −1 indicated a progressive occupation of silica in the accessible sites on the membrane surface with the addition of Si-MWCNT. At about 836 and 1,184 cm −1 , the absorption peaks were initiated by an Si O Si symmetric and asymmetric stretching vibrationrespectively, demonstrating the generation of Si O Si in the system.…”

Nonlinear optical properties of arsenic telluride and its use in ultrafast fiber lasers

“…The pure PVP film has a small absorption over a range of 1,000 nm-2,700 nm with two small peaks at 1946 nm and 2,280 nm, respectively, which are caused by the PVP vibration 81 . The interesting fact is that there is a strong peak at ~ 2,950 nm (wavenumber = ~ 3,400 cm −1 ) in the absorption spectrum of the α-As 2 Te 3 /PVP film, which corresponds to the O-H stretching vibration of PVP 82,83 . Since the uniformity of our prepared sample is not good, it is thus very difficult to figure out the precise thickness value of our sample at a particular position, at which the incident laser beam is focused.…”