Effects of different porous fillers on interfacial properties of poly (vinyl alcohol) hybrid films

2021 ◽  
pp. 50641
Author(s):  
Sining Wang ◽  
Zhen Huang ◽  
Xiaofei Ru ◽  
Jiting Wang
Keyword(s):  
Vinyl Alcohol ◽  
Interfacial Properties ◽  
Poly Vinyl Alcohol ◽  
Hybrid Films

Effects of SiO2 and In Situ Crosslinking on the Swelling and Thermal Properties of Poly(vinyl Alcohol)/SiO2 Hybrid Films

2011 ◽  
Vol 266 ◽  
pp. 180-183 ◽  
Author(s):  
Jie Liu ◽  
Ke Yong Tang
Keyword(s):  
Vinyl Alcohol ◽  
Sio2 Film ◽  
Poly Vinyl Alcohol ◽  
Swelling Ratio ◽  
Hybrid Films ◽  
Initial Stage ◽  
In Situ Crosslinking ◽  
Hydrolysis Of ◽  
Thermal Stability Of

Poly(vinyl alcohol) (PVA)/SiO2 hybrid films were prepared through hydrolysis of tetraethoxysilane (TEOS) in the presence of PVA solution, followed by the in-situ crosslinking with formaldehyde (HCHO) in acidic circumstance. The swelling and thermal gravimetric (TG) analysis was employed to evaluate the influence of SiO2 and crosslinking on the properties of the hybrid films. The results indicate that SiO2 affects effectively the swelling property and thermal stability of the hybrid films because of both the filling and crosslinking effects of SiO2. With increasing the crosslinking time, the swelling ratio at equilibrium of the hybrid films decreases. The swelling ratio at equilibrium of the hybrid films is sensitive to the SiO2 content, which is similar to the swelling ratio at equilibrium (65~75%) for PVA and PVA/SiO2 hybrid films with enough crosslinking time (12h). Compared to the film without in-situ crosslinking, the crosslinked PVA/SiO2 film showed a lower swelling ratio at equilibrium and an increased diffusion coefficient at the initial stage of swelling.

Reaction mechanism of thermally-induced electric conduction of poly(vinyl alcohol)–silver nitrate hybrid films

RSC Advances ◽  
2016 ◽  
Vol 6 (61) ◽  
pp. 56728-56737 ◽  
Author(s):  
Yong Gan ◽  
Shibing Bai ◽  
Shouliang Hu ◽  
Xiang Zhao ◽  
Yuefang Li
Keyword(s):  
Reaction Mechanism ◽  
Silver Nitrate ◽  
Metal Nanoparticles ◽  
Vinyl Alcohol ◽  
Hybrid Composites ◽  
Functional Materials ◽  
Poly Vinyl Alcohol ◽  
Electric Conduction ◽  
Hybrid Films ◽  
Thermally Induced

The combination of metal nanoparticles and polymers endows their hybrid composites with a number of unique features and opens a new way to fabricate novel functional materials.

Simple detection of food spoilage using polydiacetylene/poly(vinyl alcohol) hybrid films

2016 ◽  
Vol 24 (4) ◽  
pp. 380-384 ◽  
Author(s):  
Sera Park ◽  
Gil Sun Lee ◽  
Chunzhi Cui ◽  
Dong June Ahn
Keyword(s):  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Food Spoilage ◽  
Hybrid Films ◽  
Simple Detection

THE EFFECT OF RESIDUAL POLY(VINYL ALCOHOL) ON BIOPHYSICAL INTERACTION OF NANOPARTICLES WITH ENDOTHELIAL CELL MODEL MEMBRANE

2011 ◽  
Vol 10 (04n05) ◽  
pp. 539-545 ◽  
Author(s):  
RADHIKA BHAVE ◽  
CHIRANJEEVI PEETLA ◽  
VINOD LABHASETWAR
Keyword(s):  
Endothelial Cell ◽  
Gene Delivery ◽  
Surface Pressure ◽  
Vinyl Alcohol ◽  
Membrane Lipids ◽  
Cell Model ◽  
Interfacial Properties ◽  
Model Membrane ◽  
Poly Vinyl Alcohol ◽  
Biophysical Interactions

Poly(vinyl alcohol) (PVA) is commonly used as an emulsifier in the formulation of nanoparticles (NPs) comprising poly DL-lactide co-glycolide and polylactide-based biodegradable polymers for drug and gene delivery applications. A fraction of PVA remains associated with the NPs at the interface despite their repeated washing (residual PVA). We hypothesize that this residual PVA influences the interfacial properties of NPs and hence their biophysical interactions with membrane lipids. In this study, we formulated NPs using PVA of different molecular weights to determine the effects of the residual PVA on biophysical interactions of the formulated NPs with the endothelial cell model membrane using a Langmuir balance. Despite similar physical properties (particle size and zeta potential), NPs formulated with different PVA demonstrated significant variations in their intrinsic surface properties and biophysical interactions with the model membrane. This was evident from the difference in the surface pressure–area (π–A) isotherms prepared in the presence of different formulations of NPs and the change in surface pressure of the model membrane following interaction with NPs. The variation in the biophysical properties was observed even with the NPs formulated using the same molecular weight PVA but obtained from different lots. Since the interfacial properties of NPs can significantly influence NP interactions with cells and tissue, their biophysical characterization could prove to be an important parameter not only to obtain consistent results with NPs but also to optimize their properties for drug/gene delivery applications.

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