Double Network Hydrogel
Double Network Hydrogel - Related Videos
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...
02:53
Developing a Micro-Tissue-Engineered Neural Network Using a Hydrogel-Based Micro-column
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2025
Source: Struzyna, L. A. et. al., Anatomically Inspired Three-dimensional Micro-tissue Engineered Neural Networks for Nervous System Reconstruction, Modulation, and Modeling. J. Vis. Exp. (2017)This video demonstrates the development of micro-tissue-engineered neural networks using a hydrogel micro-column with an extracellular matrix core. Seeded neuronal aggregates adhere, extend projections, and form structured neural networks, contributing to advancements in neurodevelopment and...
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...
10:53
Image-guided, Laser-based Fabrication of Vascular-derived Microfluidic Networks
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Cited by 10 •
2017
This protocol outlines the implementation of image-guided, laser-based hydrogel degradation to fabricate vascular-derived, biomimetic microfluidic networks embedded in poly(ethylene glycol) diacrylate (PEGDA) hydrogels. These biomimetic microfluidic systems may be useful for tissue engineering applications, generation of in vitro disease models, and fabrication of advanced "on-a-chip" devices.
09:30
The Synthesis of RGD-functionalized Hydrogels as a Tool for Therapeutic Applications
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Cited by 17 •
2016
We present a protocol for the synthesis of RGD-functionalized hydrogels as devices for cell and drug delivery. The procedure involves copper catalyzed alkyne-azide cycloaddition (CuAAC) between alkyne-modified polyacrylic acid (PAA) and a RGD-azide derivative. The hydrogels are formed using microwave-assisted polycondensation and their physicochemical properties are investigated.
FAQs
The rigid, highly crosslinked network acts as a sacrificial structure under mechanical load. Controlled bond rupture dissipates energy instead of allowing that energy to concentrate at one damaging site. This mechanism reduces the likelihood of catastrophic failure and helps the material tolerate demanding mechanical conditions more effectively than a conventional hydrogel.
The softer, loosely crosslinked network preserves elasticity while the rigid network dissipates mechanical energy. It helps maintain the material’s continuity and prevents complete structural collapse after damage begins. This complementary behavior is important because toughness depends not only on absorbing energy, but also on retaining a recoverable, flexible material structure.
Crosslinking levels determine how the two networks share mechanical responsibilities. A highly crosslinked component supplies strength and energy dissipation, whereas a loosely crosslinked component supports elasticity and failure resistance. Adjusting their balance allows researchers to tune stiffness and resilience, helping the hydrogel better match the mechanical demands of a selected bioengineering environment.
Both material classes provide a water-rich environment, but double network designs add a mechanism for improving strength and toughness. Their combined mechanical behavior can more closely resemble that of biological tissues than conventional hydrogels alone. This distinction supports investigation of applications where hydration must be combined with resistance to deformation or failure.
Researchers can vary the composition of the interpenetrating networks to adjust stiffness, resilience, swelling, and degradation. These properties influence how the material behaves in a biomedical setting and how long it remains suitable for a particular use. Such tunability helps align the hydrogel’s physical behavior with the requirements of specific tissues, dressings, or delivery systems.
A conceptual design sequence begins by combining two interpenetrating polymer networks with different crosslinking characteristics. The rigid network is selected to dissipate energy through controlled bond rupture, while the softer network provides elasticity and structural continuity. Researchers then tune the composition and assess properties such as stiffness, swelling, resilience, and degradation for the intended bioengineering environment.
Their water-rich nature supports a hydrated material environment, while the dual-network architecture supplies greater strength and toughness than conventional hydrogels. Because researchers can tune mechanical and degradation-related properties, these materials can be evaluated for scaffolds and cartilage substitutes where tissue-like mechanical behavior is especially relevant to bioengineering design.
For wound dressings, the combination of hydration with improved mechanical durability may help address the need for a water-rich material that better resists failure. In controlled drug delivery, tunable swelling and degradation provide design variables that can influence material behavior over time. These applications illustrate how composition-based control extends the value of the hydrogel beyond structural tissue support.