scholarly journals Structure of the Hydrogels Obtained by Blending Poly (vinyl alcohol) with Alginic Acid and Repeated Freezing and Thawing.

1991 ◽  
Vol 48 (12) ◽  
pp. 775-781 ◽  
Author(s):  
Masanobu NAGURA ◽  
Jyun MURAI ◽  
Yutaka OHKOSHI
Keyword(s):  
Vinyl Alcohol ◽  
Alginic Acid ◽  
Poly Vinyl Alcohol ◽  
Freezing And Thawing ◽  
Repeated Freezing

Reinforcement with cellulose nanocrystals of poly(vinyl alcohol) hydrogels prepared by cyclic freezing and thawing

Soft Matter ◽  
2011 ◽  
Vol 7 (6) ◽  
pp. 2373 ◽  
Author(s):  
Tiffany Abitbol ◽  
Timothy Johnstone ◽  
Thomas M. Quinn ◽  
Derek G. Gray
Keyword(s):  
Cellulose Nanocrystals ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Freezing And Thawing

scholarly journals Structural Organization of Poly(vinyl alcohol) Hydrogels Obtained by Freezing and Thawing Techniques:  A SANS Study

2005 ◽  
Vol 17 (5) ◽  
pp. 1183-1189 ◽  
Author(s):  
Rosa Ricciardi ◽  
Gaetano Mangiapia ◽  
Fabrizio Lo Celso ◽  
Luigi Paduano ◽  
Roberto Triolo ◽  
...  
Keyword(s):  
Vinyl Alcohol ◽  
Structural Organization ◽  
Poly Vinyl Alcohol ◽  
Freezing And Thawing

Gel permeation chromatographic properties of poly(vinyl alcohol) gel particles prepared by freezing and thawing

1994 ◽  
Vol 678 (1) ◽  
pp. 180-182 ◽  
Author(s):  
Ryoichi Murakami ◽  
Hiroshi Hachisako ◽  
Kimiho Yamada ◽  
Yoshiaki Motozato
Keyword(s):  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Freezing And Thawing ◽  
Gel Particles ◽  
Gel Permeation

Novel Preparation of Poly(Vinyl Alcohol) Microparticles without Crosslinking Agent for Controlled Drug Delivery

1993 ◽  
Vol 331 ◽  
Author(s):  
Becky J. Ficek ◽  
Nicholas A. Peppas
Keyword(s):  
Vinyl Alcohol ◽  
Corn Oil ◽  
Crosslinking Agent ◽  
Degree Of Crystallinity ◽  
Poly Vinyl Alcohol ◽  
Release Mechanism ◽  
Lauryl Sulfate ◽  
Freezing And Thawing ◽  
Scanning Calorimetry ◽  
Thawing Process

AbstractPoly(vinyl alcohol) microparticles were prepared by a novel freezing-thawing process in the absence of a crosslinking agent. An aqueous PVA solution to which 1.25 wt% sodium lauryl sulfate was added was dispersed in corn oil. The system was agitated and the ensuing suspended droplets of PVA solution were solidified by a cyclic freezing-thawing process. Key parameters of the process were the PVA to corn oil ratio, the amount of surfactant added, agitation speed, number of freeze cycles, temperatures of freezing and thawing, and presence of additional components.Crystallization was observed during the freezing-thawing process. The degree of crystallinity was measured with differential scanning calorimetry. Bovine serum albumin was incorporated into the particles by an absorption technique. Studies of BSA release from the microparticles in vitro showed that the release could be prolonged for up to 7 days. BSA diffusion coefficients were calculated from these data and the release mechanism was identified.

Morphology and structure of highly elastic poly(vinyl alcohol) hydrogel prepared by repeated freezing-and-melting

1986 ◽  
Vol 264 (7) ◽  
pp. 595-601 ◽  
Author(s):  
F. Yokoyama ◽  
I. Masada ◽  
K. Shimamura ◽  
T. Ikawa ◽  
K. Monobe
Keyword(s):  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Morphology And Structure ◽  
Repeated Freezing
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