Swelling Kinetic Study of Poly(Vinyl Alcohol)/Poly(γ-Glutamic Acid) Blend Hydrogel

2015 ◽  
Vol 1095 ◽  
pp. 423-426
Author(s):  
Mian Mian Zhang ◽  
Yu Xi Chen ◽  
Xia Ma
Keyword(s):  
Glutamic Acid ◽  
Kinetic Study ◽  
Vinyl Alcohol ◽  
Diffusion Mechanism ◽  
Fickian Diffusion ◽  
Poly Vinyl Alcohol ◽  
Swelling Kinetics ◽  
Swelling Mechanism ◽  
Swelling Kinetic ◽  
Sensitive Property

In this article, the swelling behavior and swelling kinetic of poly (vinyl alcohol)/poly (γ-glutamic acid) hydrogel were investigated. It was found that the PGA/PVA hydrogels revealed the pH-sensitive property and exhibited a faster swelling at pH7.4. The study of swelling kinetics revealed that the swelling mechanism followed the non-Fickian diffusion mechanism.

Effects of Thermal Crosslinking on the Properties and Release Profiles of Three-Dimensional (3D)-Printed Poly Vinyl Alcohol (PVA) Tablets

2020 ◽  
Vol 859 ◽  
pp. 258-264 ◽  
Author(s):  
Thapakorn Chareonying ◽  
Praneet Opanasopit ◽  
Theerasak Rojanarata ◽  
Prasert Akkaramongkolporn ◽  
Prasopchai Patrojanasophon
Keyword(s):  
Vinyl Alcohol ◽  
Release Kinetics ◽  
Diffusion Mechanism ◽  
Three Dimensional ◽  
Physical And Mechanical Properties ◽  
Fickian Diffusion ◽  
Poly Vinyl Alcohol ◽  
Thermal Crosslinking ◽  
3D Printed ◽  
Release Profiles

The objective of this study was to investigate the effects of thermal crosslinking on the properties of 3D-printed poly-vinyl alcohol (PVA) tablets loaded with fluorescein sodium (NaFl). The PVA filaments were selected for the fabrication of 3D-printed tablets. Different infill densities (80% and 100%) of the tablets were applied. The tablets were crosslinked at different temperatures and times. The physiochemical properties of the tablets and the release profiles of fluorescein from the 3D-tablets were investigated. The 3D-printed PVA tablets were successfully produced with favorable physical and mechanical properties. A smooth surface with a mesh pattern was obtained with a yellow color of NaFl. The 100% infilled tablets provided slightly greater loading efficiency and loading capacity in comparison with the 80% infilled tablets. The release of NaFl increased with an increase in crosslinking time and temperature. However, crosslinking at 140 °C for 4 h (80% CFT4 and 100%CFT4) showed similar release characteristic compared to the non-crosslink one. The release kinetics of 3D-printed tablets were observed to be Quasi-Fickian diffusion mechanism.

Reaction of poly(vinyl alcohol) and dialdehydes during gel formation probed by 1H n.m.r.—a kinetic study

Polymer ◽  
1997 ◽  
Vol 38 (19) ◽  
pp. 4863-4871 ◽  
Author(s):  
E.W. Hansen ◽  
K.H. Holm ◽  
D.M. Jahr ◽  
K. Olafsen ◽  
Aa. Stori
Keyword(s):  
Kinetic Study ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Gel Formation

scholarly journals POLYMERIC BIOMATERIALS FILM BASED ON POLY(VINYL ALCOHOL) AND FISH SCALE COLLAGEN BY REPETITIVE FREEZE-THAW CYCLES FOLLOWED BY GAMMA IRRADIATION

2013 ◽  
Vol 13 (3) ◽  
pp. 221-228 ◽  
Author(s):  
Dian Pribadi Perkasa ◽  
Erizal Erizal ◽  
Basril Abbas
Keyword(s):  
Gamma Irradiation ◽  
Vinyl Alcohol ◽  
Testing Machine ◽  
Poly Vinyl Alcohol ◽  
Fish Scale ◽  
Scanning Calorimetry ◽  
Collagen Film ◽  
Freeze Thaw ◽  
Gel Fraction ◽  
Swelling Kinetic

The polymeric biomaterial film based on poly(vinyl alcohol) (PVA) and fish collagen of Lates calcarifer scale were synthesized by three times freeze-thaw cycles followed by gamma irradiation at varied doses of 0, 10, 20, and 30 kGy respectively. Characteristic of PVA/collagen film as effect of constituting polymers and cross linking methods were investigated using Fourier Transform Infrared (FTIR) spectrophotometer, Differential Scanning Calorimetry (DSC), Universal Testing Machine (UTM), and Chroma Mater. Its gel fraction and swelling kinetic were determined by gravimetry. The result showed that IR spectra of controlled and irradiated film demonstrated characteristic vibration bands of both constituting materials. The DSC analysis revealed that gamma irradiation induced interaction between PVA and collagen at molecular level. Improvement of tensile properties by gamma irradiation was observed on tensile strength at 30 kGy with p < 0.05. Gamma irradiation also significantly (p < 0.05) increased yellowness of PVA/collagen film, reduced swelling kinetic, and increased gel fraction of films.

scholarly journals Pullulan/Poly(Vinyl Alcohol) Composite Hydrogels for Adipose Tissue Engineering

Materials ◽  
2019 ◽  
Vol 12 (19) ◽  
pp. 3220
Author(s):  
Iuliana Samoila ◽  
Sorina Dinescu ◽  
Gratiela Gradisteanu Pircalabioru ◽  
Luminita Marutescu ◽  
Gheorghe Fundueanu ◽  
...  
Keyword(s):  
Tissue Engineering ◽  
Vinyl Alcohol ◽  
Adipogenic Differentiation ◽  
Poly Vinyl Alcohol ◽  
Dissolution Behavior ◽  
Swelling Kinetics ◽  
Chemical Crosslinking ◽  
Engineering Applications ◽  
Composite Hydrogels ◽  
Adipose Tissue Engineering

Composite hydrogels based on pullulan (HP) and poly(vinyl alcohol) (PVA) were both prepared by simple chemical crosslinking with sodium trimethaphosphate (STMP) or by dual crosslinking (simultaneously chemical crosslinking with STMP and physical crosslinking by freeze-thaw technique). The resulting hydrogels and cryogels were designed for tissue engineering applications. PVA, with two different molecular weights (47,000 and 125,000 g/mol; PVA47 and PVA125, respectively), as well as different P/PVA weight ratios were tested. The physico-chemical characterization of the hydrogels was performed by FTIR spectroscopy and scanning electron microscopy (SEM). The swelling kinetics, dissolution behavior, and degradation profiles in simulated physiological conditions (phosphate buffer at pH 7.4) were investigated. Pullulan concentration and the crosslinking method had significant effects on the pore size, swelling ratio, and degradation profiles. Cryogels exhibit lower swelling capacities than the conventional hydrogels but have better stability against hydrolitic degradation. Biocompatibility of the hydrogels was also investigated by both MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) and LDH (lactaten dehydrogenase) assay. The MTT and LDH assays proved that dual crosslinked HP/PVA125 (75:25, w/w) scaffolds are more biocompatible and promote to a greater extent the adhesion and proliferation of L929 murine fibroblast cells than chemically crosslinked HP/PVA47 (50/50, w/w) scaffolds. Moreover, the HP/PVA125 cryogel had the best ability for the adipogenic differentiation of cells. The overall results demonstrated that the HP/PVA composite hydrogels or cryogels are suitable biomaterials for tissue engineering applications.

Kinetic study of the thermal decomposition of poly(vinyl alcohol)/kraft lignin derivative blends

2006 ◽  
Vol 441 (1) ◽  
pp. 101-109 ◽  
Author(s):  
D.M. Fernandes ◽  
A.A. Winkler Hechenleitner ◽  
E.A. Gómez Pineda
Keyword(s):  
Thermal Decomposition ◽  
Kinetic Study ◽  
Vinyl Alcohol ◽  
Kraft Lignin ◽  
Poly Vinyl Alcohol
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