Hydrogel Formation
Hydrogel Formation - Related Videos
10:45
Light-mediated Formation and Patterning of Hydrogels for Cell Culture Applications
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Cited by 26 •
2016
We describe a sequential process for light-mediated formation and subsequent biochemical patterning of synthetic hydrogel matrices for three-dimensional cell culture applications. The construction and modification of hydrogels with cytocompatible photoclick chemistry is demonstrated. Additionally, facile techniques to quantify and observe patterns and determine cell viability within these hydrogels are presented.
07:25
Collagen Hydrogels
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2023
Collagen is another widely used biomaterial that has found popularity in commercial applications, such as photography. Collagen has more recently been used in tissue engineering applications, by creating hydrogels that provide structure to engineered tissue. This video introduces collagen as a biomaterial, demonstrates how it is harvested from porcine skin, and shows how the material is used to create a hydrogel for tissue engineering applications. Finally, several applications of the material...
08:33
Hydrogel Synthesis
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2023
Source: Amber N. Barron, Ashlea Patterson, and Taylor D. Sparks, Department of Materials Science and Engineering, The University of Utah, Salt Lake City, UT Hydrogels are a versatile class of cross-linked polymers produced through relatively simple procedures and with generally inexpensive materials. They can be formed from solution and involve a polymer backbone formed from monomer reagents, an initiator which makes the polymer reactive and a crosslinking species which binds the polymer chains...
15:33
Microwave-assisted Functionalization of Poly(ethylene glycol) and On-resin Peptides for Use in Chain Polymerizations and Hydrogel Formation
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Cited by 32 •
2013
This video will illustrate a rapid, efficient method to methacrylate poly(ethylene glycol), enabling chain polymerizations and hydrogel synthesis. It will demonstrate how to similarly introduce methacrylamide functionalities into peptides, detail common analytical methods to assess functionalization efficiency, provide suggestions for troubleshooting and advanced modifications, and demonstrate typical hydrogel characterization techniques.
03:31
Formation of Human Thymus Organoids in Three-Dimensional Fibrin Hydrogels
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Cited by 1 •
2024
Here, we describe a protocol for the formation of human iPSC-derived thymus organoids grown in 3D fibrin hydrogels aiming to support thymic epithelial cell (TEC) maturation and prolonged maintenance, as well as thymopoiesis in vitro.
FAQs
Hydrogel formation can be governed by several interactions within the polymer network: covalent bonds, ionic interactions, hydrogen bonds, or reversible molecular associations. These mechanisms determine how chains connect and how readily the network can reorganize. Selecting among them gives engineers a way to tune structural integrity and the material’s response to its surrounding liquid.
Cross-link density acts as a central design variable. Increasing or decreasing the number of connections between polymer chains changes how much liquid the network can absorb, how stiff it becomes, and how water or solutes move through it. Engineers therefore adjust cross-linking when they need to balance swelling with mechanical stability or transport performance.
Water uptake and solute movement depend on the space and connectivity created by cross-linked chains. A network that retains liquid while preserving its structure can also regulate how water and dissolved substances pass through the material. This relationship is important when engineers design hydrogels to manage release, sensing, or interactions with tissue-like environments.
Chemical cross-linking uses covalent bonding, whereas physical cross-linking relies on interactions such as ionic forces, hydrogen bonding, or reversible molecular associations. The distinction matters because the type of connection determines the network’s organization and its ability to retain liquid while maintaining integrity. Engineers compare these mechanisms when tailoring hydrogels for different mechanical, chemical, or responsive-material requirements.
Design begins with hydrogel composition and processing conditions, then considers the desired cross-link density and resulting properties. These choices influence swelling, stiffness, and transport, allowing the material to be tailored rather than treated as a fixed formulation. In practice, engineers use this tuning to match the network to a specific device, biological setting, or delivery function.
Controlled formation supports several application classes, including drug-release systems, wound dressings, tissue-engineering materials, sensors, and soft robotics. Each use benefits from a network whose liquid retention, structural integrity, mechanical behavior, and transport can be adjusted. The same formation principles therefore connect biomedical designs with responsive engineering systems that need tunable chemical and physical properties.