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self-healing-hydrogel
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Design and Synthesis of Self-healing Gels Based on Natural Polysaccharides Using Reversible Bonds and Investigations of their Applications
, Ph.D. Dissertation Sharif University of Technology ; Pourjavadi, Ali (Supervisor)
Abstract
In recent years, burns and deep wounds that occur in various accidents are important reasons of death in the world. Therefore, the healing process of burn and full thickness of wounds due to late treatment has always been considered by physicians. Thus, the correct treatment and speed of healing of these types of wounds have always been studied. Many synthetic and natural materials have been used to treat wounds, which among them, hydrogels have received a great attention due to creating a moist environment for wounds and absorbing secretions. However, external mechanical stresses may degrade the therapeutic hydrogel. Recently, self-healing coating hydrogels have been designed and developed...
Design and Fabrication of Self-Healable Double-Network (DN) Hydrogels Based on Reversible and Irreversible Bonds with Tunable Mechanical Properties
, M.Sc. Thesis Sharif University of Technology ; Pourjavadi, Ali (Supervisor)
Abstract
In order to increase the mechanical properties and resistance of hydrogels to external damage, for their wide application in tissue engineering and medicine, self-healing two-grid hydrogels are used. Two-grid hydrogels with physical lattice have more advantages than two-grid hydrogels with chemical lattice because they have reversible and dynamic bonds, which in addition to increasing mechanical properties, also have self-healing properties. In order to achieve high mechanical properties, gelatin-based double-grid hydrogels with hydrogen bonding and metal-ligand interaction are designed. In the present paper, two-grid hydrogels consisting of gelatin network and other network of sodium...
Preparation and Characterization of the Shape Memory Polymers and Polymeric Nanocomposites and Investigation of their Applications
, Ph.D. Dissertation Sharif University of Technology ; Pourjavadi, Ali (Supervisor)
Abstract
The current research focuses on preparing conductive hydrogels with combined shape memory and actuating under the effect of external stimuli. Two studies were conducted in which hydrogels simultaneously showed shape memory and actuating behaviors. The magnetic carrageenan-based double network hydrogels were prepared in the first part. The presence of magnetic nanoparticles not only strengthened the mechanical properties, but also induced shape memory properties under a magnetic field. These hydrogels had good electrical conductivity and showed successful performance as strain sensors. The hydrogels performed well in simple and complex shape memory experiments in response to the temperature....