Tear force of physically crosslinked poly(vinyl alcohol) gels with different submicrometer-scale network structures

2014 ◽  
Vol 132 (4) ◽  
pp. n/a-n/a ◽  
Author(s):  
Taegu Noh ◽  
Yujiro Bando ◽  
Kensuke Ota ◽  
Saori Sasaki ◽  
Atsushi Suzuki
Keyword(s):  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Network Structures ◽  
Scale Network ◽  
Physically Crosslinked

scholarly journals A facile method for synthesizing free-shaped and tough double network hydrogels using physically crosslinked poly(vinyl alcohol) as an internal mold

2010 ◽  
Vol 1 (5) ◽  
pp. 693 ◽  
Author(s):  
Tasuku Nakajima ◽  
Naoyuki Takedomi ◽  
Takayuki Kurokawa ◽  
Hidemitsu Furukawa ◽  
Jian Ping Gong
Keyword(s):  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Internal Mold ◽  
Double Network ◽  
Physically Crosslinked

scholarly journals Poly(vinyl alcohol): Physical Approaches to Designing Biomaterials for Biomedical Applications

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Shathani Nkhwa ◽  
Kristo Fernando Lauriaga ◽  
Evren Kemal ◽  
Sanjukta Deb
Keyword(s):  
Vinyl Alcohol ◽  
Biomedical Applications ◽  
Physical And Mechanical Properties ◽  
Poly Vinyl Alcohol ◽  
Biocompatible Polymers ◽  
Chemical Crosslinking ◽  
Biocompatible Polymer ◽  
Physical Methods ◽  
Physically Crosslinked ◽  
Physical Crosslinking

Poly(vinyl alcohol) is a non-toxic, biosynthetic polymer and biocompatible polymer that has the ability to form hydrogels either via chemical or physical crosslinking. Whilst chemical crosslinking provides greater control on the properties of the resultant hydrogel, physically crosslinked hydrogels or blends with other biocompatible polymers are more suited for biomedical applications. In this paper we report a systematic study on the effect of varying concentrations of PVA, physical methods of crosslinking, and PVA-gelatin and PVA-PVP blends on the physical and mechanical properties of the hydrogels.

scholarly journals Diffusion and Controlled Release in Physically Crosslinked Poly (Vinyl Alcohol)/Iota-Carrageenan Hydrogel Blends

Polymers ◽  
2020 ◽  
Vol 12 (7) ◽  
pp. 1544 ◽  
Author(s):  
Catalin Croitoru ◽  
Ionut Claudiu Roata ◽  
Alexandru Pascu ◽  
Elena Manuela Stanciu
Keyword(s):  
Vinyl Alcohol ◽  
Weight Ratio ◽  
Mesh Size ◽  
Strong Interactions ◽  
Poly Vinyl Alcohol ◽  
Release Rates ◽  
Antibiotic Drugs ◽  
Swelling Mechanism ◽  
Physically Crosslinked ◽  
Crystalline Domains

This paper reports the obtaining of poly (vinyl alcohol) and ι-carrageenan blend hydrogels by physical crosslinking (consecutive freeze–thaw cycles). The two polymers were completely miscible in the weight ratio interval used in this study, as determined by solution viscometry data. Strong interactions through hydrogen bonding and forming of mixed interpolymer crystalline domains were observed, which are responsible for the formation of stable drug release-tunable matrices. The release profiles of three model antibiotic drugs (amoxicillin, tetracycline hydrochloride, and gentamicin sulfate) were assessed in a pH interval between 3 and 7.3. They were found to be strongly dependent on the drug chemistry, mesh size of the hydrogels, swelling mechanism, and pH of the release medium. A decrease of up to 40% in the release rates and up to 10% in the diffusion coefficients of the model drugs was registered with the increase in ι-carrageenan content.

scholarly journals Physically Crosslinked Poly (Vinyl Alcohol)/Kappa-Carrageenan Hydrogels: Structure and Applications

Polymers ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 560 ◽  
Author(s):  
Catalin Croitoru ◽  
Mihai Alin Pop ◽  
Tibor Bedo ◽  
Mihaela Cosnita ◽  
Ionut Claudiu Roata ◽  
...  
Keyword(s):  
Polymer Matrix ◽  
Diffusion Coefficients ◽  
Vinyl Alcohol ◽  
Weight Ratio ◽  
Poly Vinyl Alcohol ◽  
Distilled Water ◽  
Cationic Dye ◽  
Structure Morphology ◽  
Physically Crosslinked ◽  
Kappa Carrageenan

This paper discusses the structure morphology and the thermal and swelling behavior of physically crosslinked hydrogels, obtained from applying four successive freezing–thawing cycles to poly (vinyl alcohol) blended with various amounts of κ-carrageenan. The addition of carrageenan in a weight ratio of 0.5 determines a twofold increase in the swelling degree and the early diffusion coefficients of the hydrogels when immersed in distilled water, due to a decrease in the crystallinity of the polymer matrix. The diffusion of water into the polymer matrix could be considered as a relaxation-controlled transport (anomalous diffusion). The presence of the sulfate groups determines an increased affinity of the hydrogels towards crystal violet cationic dye. A maximum physisorption capacity of up to 121.4 mg/g for this dye was attained at equilibrium.

Physically crosslinked poly(vinyl alcohol)–carrageenan composite hydrogels: pore structure stability and cell adhesive ability

RSC Advances ◽  
2015 ◽  
Vol 5 (95) ◽  
pp. 78180-78191 ◽  
Author(s):  
Yabin Zhang ◽  
Lei Ye ◽  
Man Cui ◽  
Boguang Yang ◽  
Junjie Li ◽  
...  
Keyword(s):  
Cell Adhesion ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Structure Stability ◽  
Pore Collapse ◽  
Composite Hydrogels ◽  
Cell Adhesive ◽  
Adhesive Ability ◽  
Physically Crosslinked ◽  
Enhance Cell Adhesion

Poly(vinyl alcohol) (PVA)–carrageenan (CAR) composite hydrogels can reduce pore collapse during lyophilization and enhance cell adhesion in comparison to pure PVA hydrogels.

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