Hydrogel Synthesis
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 together. An important aspect of these materials is that they swell in the presence of water, but this response can be tuned further to enhance swelling as a function of salinity, pH, or other signals. As a final product, hydrogels can be used in aqueous or dry environments, with a range of useful properties such as flexibility, high absorbance, transparency and thermal insulation. They are commonly used for liquid absorbance, sensors, consumer products, and drug delivery.
The pre-gel solution was created in a 1000µl test tube; materials, role in polymerization and amounts added are listed in Tables 1.
| Material | Purpose | Structure | Mole percent |
| 2,2-Dimethoxy-2-phenyl-acetophenone (DMPAP) | Free readical initiator (photoinitiator) Risultati The final hydrogel monomer is shown in Figure 7, and the synthesized hydrogels are shown in Figure 8. The degree of swelling was found to be approximately 136% for the 1 min sample, 387% for the 1.5 min sample and 81% for the 5 min sample. These results demonstrate the relationship between degree of crosslinking, or the extent to which the network is connected, and swelling ability. More links between the polymer molecules mean m Applicazione e Riepilogo Hydrogel synthesis is a technique for producing crosslinked polymeric materials which can swell in response to liquid, UV light, pH, or a range of other stimulants. Synthesis by combination of liquid solutions is advantageous for the simplicity of mixing and forming hydrogels, though the final product is generally impure and tends to contain polymers with low molecular weights. This specific procedure, while simple, involves chemicals that are both toxic and flammable, and therefore requires extreme care and preventative Tags Hydrogel SynthesisCross linked PolymersInexpensive MaterialsLiquid AbsorbentsSensorsConsumer ProductsDrug DeliveryPolymer BackboneCrosslinking SpeciesWater SwellingSalinityPHAqueous EnvironmentsDry EnvironmentsFlexibilityHigh AbsorbanceTransparencyThermal InsulationCharacterization Of HydrogelsWater AbsorptionHydrophilic SpeciesIonic SpeciesSwelling Mechanism Vai a...  Personale delle biblioteche CHI SIAMO Copyright © 2024 MyJoVE Corporation. Tutti i diritti riservati |