Sodium Polyacrylate Reinforced Collagen Fiber Membrane Based On Electrostatic Interaction
Keywords
Collagen, Sodium Polyacrylate, Electrostatic Interaction, Properties, Edible Film
Abstract
In order to improve the performance of the collagen fiber membrane, based on the negative charge of sodium polyacrylate and the positive charge of acid-swollen collagen fiber, using the principle of electrostatic interaction, sodium polyacrylate with a mass fraction of 0.1% to 1.0% was used to strengthen the collagen fiber membrane. , its impact on membrane properties was evaluated. The results showed that as the mass fraction of sodium polyacrylate increases, the Zeta potential of the film-forming liquid changes significantly (P<0.05), indicating that its electrostatic interaction is enhanced. After adding sodium polyacrylate, the tensile strength of the composite membrane gradually increased, reaching a maximum of 1.50 times that of the pure membrane; the elongation at break, light transmittance and water vapor transmittance decreased, among which the water vapor transmittance was the lowest 1.30¡Á 10-12 g/(cm¡¤s¡¤Pa); film thermal stability analysis shows that the degradation temperature of the composite film increases, and the film thickness does not change significantly. Scanning electron microscopy shows that the sodium polyacrylate-collagen fiber composite film is denser. When the mass fraction of sodium polyacrylate is 0.3%, the composite film has better comprehensive properties, with a tensile strength of 37.60 MPa, elongation at break of 14.20%, light transmittance of 48.70%, and water vapor transmittance of 1.30¡Á10 -12 g/(cm¡¤s¡¤Pa). In addition, infrared analysis also showed that the conformation of the composite membrane changed. Electrostatic interaction leads to the enhanced interaction between sodium polyacrylate and collagen and changes in membrane properties. Appropriate addition amount can effectively improve the properties of collagen fiber membranes. For further information of this article and research, feel free to contact our team for asssitance. Original research was done by Wang Yabin, Wang Wenhang
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