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The properties of a hydrogel are highly dependent on the type and quantity of its crosslinks, making photopolymerization a popular choice for fine-tuning hydrogels. This technique has seen considerable use in cell and tissue engineering applications due to the ability to inject or mold a precursor solution loaded with cells into a wound site ...
Nanocomposite hydrogels [23] [24] or hybrid hydrogels, are highly hydrated polymeric networks, either physically or covalently crosslinked with each other and/or with nanoparticles or nanostructures. [25] Nanocomposite hydrogels can mimic native tissue properties, structure and microenvironment due to their hydrated and interconnected porous ...
Self-healing hydrogels are a specialized type of polymer hydrogel.A hydrogel is a macromolecular polymer gel constructed of a network of crosslinked polymer chains. Hydrogels are synthesized from hydrophilic monomers by either chain or step growth, along with a functional crosslinker to promote network formation.
Hydrogels have a high water content, [7] with some hydrogels containing up to 90% water. [5] Active drugs and other substances dispersed as colloids or dissolved in water can be easily taken up by hydrogels. [5] Hydrogels are biocompatible. [5] [7] They also swell to a greater volume than organogels when in contact with water and other natural ...
The electrical conductivity property of these hydrogels allows them to mimic the characteristics of nerve, muscle, and cardiac tissues. However, even though these nanocomposite hydrogels demonstrate some functions of human tissue in lab environments, more research is needed to ensure their utility as a tissue replacement. [10]
Hydrogel fiber is a hydrogel made into a fibrous state, where its width is significantly smaller than its length. The hydrogel's specific surface area at fibrous form is larger than that of the bulk hydrogel, and its mechanical properties also changed accordingly. As a result of these changes, hydrogel fiber has a faster matter exchange rate ...
Poly(2-hydroxyethyl methacrylate) (pHEMA) is a polymer that forms a hydrogel in water. Poly (hydroxyethyl methacrylate) (PHEMA) hydrogel for intraocular lens (IOL) materials was synthesized by solution polymerization using 2-hydroxyethyl methacrylate as raw material, ammonium persulfate and sodium pyrosulfite (APS/SMBS) as catalyst, and triethyleneglycol dimethacrylate (TEGDMA) as cross ...
Hydrogel dressings can adhere directly to the wound bed under normal physiological conditions via oxidation-reduction reactions of quinones. [2] [21] The adhesive properties of hydrogels have been shown to be enhanced by addition of positively charged microgels (MR) into the 3D matrix to increase electrostatic and hydrophobic interactions. [22]