Preparation and characterization of polyvinyl alcohol-gelatin hydrogel membranes for biomedical applications.
The purpose of this research was to design and develop hydrogels by esterification of polyvinyl alcohol (PVA) with gelatin. The membranes were characterized by Fourier Transform Infrared (FTIR) spectroscopy, x-ray diffraction (XRD), and differential scanning calorimetry. The viscosity of the esterified product (as solution) was compared with the mixture of PVA and gelatin of the same composition. The mechanical properties of the hydrogels were characterized by tensile tests. Swelling behavior and hemocompatibility of the membrane were also evaluated. The diffusion coefficient of salicylic acid (SA), when the receptor compartment contained Ringer's solution, through the membrane was determined. SA was used as a model drug. FTIR spectra of the membranes indicated complete esterification of the free carboxylic groups of gelatin. XRD studies indicated that the crystallinity of the membranes was mainly due to gelatin. The comparison of viscosity indicated an increase in segment density within the molecular coil. The membrane had sufficient strength and water-holding capacity. Hemocompatibility suggested that the hydrogel could be tried as wound dressing and as an implantable drug delivery system. The diffusion coefficient of SA through the membrane was found to be 1.32 x 10(-5) cm(2)/s. The experimental results indicated that the hydrogel could be tried for various biomedical applications.
Pal
Kunal
K
Materials Science Centre, Indian Institute of Technology, Kharagpur-721302, India.
Banthia
Ajit K
AK
Majumdar
Dipak K
DK
D001672:Biocompatible Materials; D001774:Blood Chemical Analysis; D004337:Drug Carriers / Q000737:chemistry*; D005780:Gelatin / Q000737:chemistry*; D006801:Humans; D020100:Hydrogels / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D008422:Materials Testing; D008567:Membranes, Artificial; D008968:Molecular Conformation; D008970:Molecular Weight; D011142:Polyvinyl Alcohol / Q000737:chemistry; D013718:Tensile Strength; D014783:Viscosity
D001672:Biocompatible Materials; D004337:Drug Carriers; D020100:Hydrogels; D008567:Membranes, Artificial; D005780:Gelatin; D011142:Polyvinyl Alcohol