Assimilation of NH4Br in Polyvinyl Alcohol/Poly(N-vinyl pyrrolidone) Polymer Blend-Based Electrolyte and Its Effect on Ionic Conductivity

2018 ◽  
Vol 18 (6) ◽  
pp. 3944-3953 ◽  
Author(s):  
V Parameswaran ◽  
N Nallamuthu ◽  
P Devendran ◽  
A Manikandan ◽  
E. R Nagarajan
Keyword(s):  
Ionic Conductivity ◽  
Polyvinyl Alcohol ◽  
Polymer Blend ◽  
Vinyl Pyrrolidone

Structural and ionic conductivity studies on proton conducting polymer electrolyte based on polyvinyl alcohol

Ionics ◽  
2008 ◽  
Vol 15 (4) ◽  
pp. 487-491 ◽  
Author(s):  
M. Hema ◽  
S. Selvasekarapandian ◽  
H. Nithya ◽  
A. Sakunthala ◽  
D. Arunkumar
Keyword(s):  
Ionic Conductivity ◽  
Polyvinyl Alcohol ◽  
Polymer Electrolyte ◽  
Conducting Polymer ◽  
Proton Conducting

Kaolin-loaded chitosan/polyvinyl alcohol electrospun scaffold as a wound dressing material: in vitro and in vivo studies

2020 ◽  
Vol 29 (5) ◽  
pp. 270-280
Author(s):  
Majid Salehi ◽  
Saeed Farzamfar ◽  
Arian Ehterami ◽  
Zahrasadat Paknejad ◽  
Farshid Bastami ◽  
...  
Keyword(s):  
Polyvinyl Alcohol ◽  
Polymer Blend ◽  
Cellular Response ◽  
Blood Compatibility ◽  
Transmission Rate ◽  
Weight Ratio ◽  
In Vivo Studies ◽  
Collagen Fibres ◽  
Uptake Capacity ◽  
Sterile Gauze

Objective: To evaluate the application of a fabricated dressing containing kaolin for skin regeneration in a rat model of excisional wounds. Method: In the present study, kaolin was loaded into electrospun polyvinyl alcohol (PVA)/chitosan polymer blend to develop a composite nanofibrous dressing. To make the yarns, kaolin with weight ratio of 5% was added to PVA/chitosan polymer blend and subsequently formed into nanofibres using the electrospinning method. Scaffolds were evaluated for to their microstructure, mechanical properties, surface wettability, water vapour transmission rate, water-uptake capacity, blood uptake capacity, blood compatibility, microbial penetration test, the number of colonies, and cellular response with the L929 cell line. Rats with full-thickness excisional wounds were treated with kaolin-containing and kaolin-free dressings. Results: The study showed that rats treated with the kaolin-incorporated mats demonstrated a significant closure to nearly 97.62±4.81% after 14 days compared with PVA/chitosan and the sterile gauze, which showed 86.15±8.11% and 78.50±4.22% of wound closure, respectively. The histopathological studies showed that in the PVA/chitosan/kaolin group, dense and regular collagen fibres were formed, while wounds treated with sterile gauze or PVA/chitosan scaffolds had random and loose collagen fibres. Conclusion: Our results show the potential applicability of PVA/chitosan/kaolin scaffolds as a wound care material.

Characterization of proton conducting poly[ethylene oxide]: Poly[vinyl pyrrolidone] based polymer blend electrolytes for electrochemical devices

2020 ◽  
pp. 095400832095346
Author(s):  
M Muthuvinayagam ◽  
K Sundaramahalingam
Keyword(s):  
Ionic Conductivity ◽  
Ammonium Nitrate ◽  
Polymer Electrolytes ◽  
Polymer System ◽  
Charge Carrier Concentration ◽  
Solid Polymer Electrolytes ◽  
Vinyl Pyrrolidone ◽  
Solid Polymer ◽  
Sem Images ◽  
Proton Conducting

Proton conducting solid polymer electrolytes comprising PEO: PVP blend with ammonium nitrate in different compositions are prepared by solution casting technique and they are characterized with different techniques. X-ray diffraction (XRD) shows that the prepared polymer electrolytes have amorphous nature. Fourier transform infrared(FTIR) spectroscopy confirms the functional groups present in the polymer membranes. The scanning electron microscopical(SEM) images confirm the presence of smooth surface in the polymer electrolytes. The ionic conductivity values are calculated by ac impedance technique. The maximum ionic conductivity is obtained for 12 wt% ammonium nitrate doped polymer system at ambient temperature (6.39 × 10−5 S/cm). From the transference number analysis by Wagner’s polarization technique, the type of conductivity, mobility and charge-carrier concentration are confirmed. Electrochemical performance is also investigated using cyclic voltammetry (CV) studies.

Bio-nanocomposite films based on cellulose nanocrystals filled polyvinyl alcohol/chitosan polymer blend

2015 ◽  
Vol 132 (22) ◽  
pp. n/a-n/a ◽  
Author(s):  
Nassima El Miri ◽  
Karima Abdelouahdi ◽  
Mohamed Zahouily ◽  
Aziz Fihri ◽  
Abdellatif Barakat ◽  
...  
Keyword(s):  
Polyvinyl Alcohol ◽  
Polymer Blend ◽  
Cellulose Nanocrystals ◽  
Nanocomposite Films
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