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  • composite
  • Some cationic composite hydrogels based on chitosan (CS) and poly (N-2-aminoethyl acrylamide) (PAEA) covalently cross-linked with glutaraldehyde (GA) were tested as novel sorbents for two dis-azo dyes: Congo Red and Direct Blue 1. (naver.com)
  • Three CS-based composite hydrogels having different molar ratios between the primary amine groups and the cross-linking agent (GA/NH2 = 5.3 and 12.5), the same total concentration of polycations (CPC = 2 wt%) and two molar ratios between polycations (PAEA:CS = 0.25 and 1.2) were used for this study. (naver.com)
  • encapsulation
  • Cytocompatibility of the hydrogel was demonstrated by encapsulation of human bone marrow-derived mesenchymal stem cells (hBMSCs). (springer.com)
  • After initial encapsulation the remaining molecules form connections between the individual micelles to form a network within the aqueous media called a hydrogel, creating a diffuse and relatively constant concentration of the encapsulated particle within the gel. (wikipedia.org)
  • Novel
  • Hennink WE, van Nostrum CF (2002) Novel crosslinking methods to design hydrogels. (springer.com)
  • In 2015, The Indian Agriculture Research Institute (IARI) reported the development of a novel hydrogel for agricultural use. (wikipedia.org)
  • Nanocomposite
  • Haraguchi K, Takehisa T (2002) Nanocomposite hydrogels: a unique organic-inorganic network structure with extraordinary mechanical, optical, and swelling/de-swelling properties. (springer.com)
  • Nanocomposite hydrogels are not to be confused with nanogel, a nanoparticle composed of a hydrogel. (wikipedia.org)
  • Using clay platelets that do not swell or exfoliate in water, using an organic cross-linker such as N,N-methylenebisacrylamide(BIS), mixing of clay and BIS, or preparing nanocomposite hydrogels in a method other than cross-link, will be unsuccessful. (wikipedia.org)
  • Despite all the specifications, the process of synthesizing nanocomposite hydrogels is simple and because of the flexible nature of the material, these hydrogels can be easily made to come in different shapes such as huge blocks, sheets, thin films, rods, hollow tubes, spheres, bellows and uneven sheets. (wikipedia.org)
  • Hysteresis is used to measure the compression properties of nanocomposite hydrogels, which shows that this material can withstand around 90% compression. (wikipedia.org)
  • This data shows that nanocomposite hydrogels exhibit superior strength relative to conventionally-made hydrogels, which would have broken down under less compression. (wikipedia.org)
  • The porous network of clay particles enable nanocomposite hydrogels to swell in the presence of water. (wikipedia.org)
  • Nanocomposite hydrogels that are enforced with carbon-based nanomaterials are mechanically tough and electrically conducive, which make them suitable for use in biomedicine, tissue engineering, drug delivery, biosensing, etc. (wikipedia.org)
  • However, even though these nanocomposite hydrogels demonstrate some functions of human tissue in lab environments, more research is needed to ensure their utility as tissue replacement. (wikipedia.org)
  • Nanocomposite hydrogels incorporated with polymeric nanoparticles are tailored for drug delivery and tissue engineering. (wikipedia.org)
  • Most inorganic nanoparticles used for nanocomposite hydrogels are already present in and necessary for the body, and thus present no negative impacts on the body. (wikipedia.org)
  • wound
  • The invention relates more particularly, but not exclusively, to such hydrogels that are useful as wound dressings. (google.co.uk)
  • For instance, in the presence of a dry wound, where additional hydration is necessary, the use of highly hydrated hydrogels can allow the autolytic debridement of necrotic tissue when its surgical removal is not feasible. (springer.com)
  • Hydrogel dressings use a hydrogel pad in contact with the wound. (wikipedia.org)
  • acrylamide
  • A polymer/clay superabsorbent composite material made by attaching acrylamide to finely powdered attapulgite (a fuller's earth clay) shows promise for its excellent water retention and low cost compared to polyacrylamide hydrogel. (wikipedia.org)
  • It forms a three-dimensional hydrogel when cross-linked with N,N'-methylene-bis-acrylamide (MBAm) or N,N'-cystamine-bis-acrylamide (CBAm). (wikipedia.org)
  • mechanical
  • Synthetic hydrogels exhibit high water absorption capacities and proper mechanical strength, although their applications are being limited because of low biocompatibility and biodegradability as well as the toxicity arisen from unreacted monomers remained in the gel structure. (springer.com)
  • Gong JP, Katsuyama Y, Kurokawa T, Osada Y (2003) Double-network hydrogels with extremely high mechanical strength. (springer.com)
  • Inspired by flexible biological tissues, researchers incorporate carbon-based, polymeric, ceramic and/or metallic nanomaterials to give these hydrogels superior characteristics like optical properties and stimulus-sensitivity which can potentially be very helpful to medical (especially drug delivery and stem cell engineering) and mechanical fields. (wikipedia.org)
  • As a result, hydrogels, self-healing alike, develop characteristic firm yet elastic mechanical properties. (wikipedia.org)
  • aqueous
  • A method of producing a hydrogel product comprises impregnating a coherent fibrous structure with an aqueous solution of a hydrogel precursor material, said fibres incorporating cations which are capable of cross-linking said precursor material to form a fibre reinforced hydrogel as the hydrogel pro. (google.co.uk)
  • peptides
  • After brief introduction of protein and its structure, the properties of proteins and peptides used to develop hydrogels, as well as their preparation methods are discussed. (springer.com)
  • silicone
  • In the nearly 20 years since their introduction, silicone hydrogel (SiHy) contact lenses have become the predominant lens choice of eye care professionals. (coopervision.com)
  • 2 Fonn D, Sweeney D. The benefits of silicone hydrogel daily disposable lenses. (coopervision.com)
  • 4 Morgan PB, Chamberlain P, Moody K, Maldonado-Codina C. Ocular physiology and comfort in neophyte subjects fitted with daily disposable silicone hydrogel contact lenses. (coopervision.com)
  • 7 Guillon M. Are silicone hydrogel contact lenses more comfortable than hydrogel contact lenses? (coopervision.com)
  • contact lenses
  • Katsoulos C, Karageorgiadis L, Vasileiou N, Mousafeiropoulos T, Asimellis G (2009) Customized hydrogel contact lenses for keratoconus incorporating correction for vertical coma aberration. (springer.com)
  • In studies, eye care professionals have noted increased visibility of reddened blood vessels and decreased corneal clarity in wearers of hydrogel lenses versus non-wearers of contact lenses. (coopervision.com)
  • mimic
  • The electrical conducting property of these hydrogels allow them to mimic the characteristic of nerve, muscle, and cardiac tissues. (wikipedia.org)
  • wherein
  • A method as claimed in any one of claims 1 to 3 wherein the hydrogel precursor consists wholly or partially of Ace Mannan (or other component of Alloe Vera). (google.co.uk)
  • A method as claimed in any one of claims 1 to 5 wherein the hydrogel precursor incorporates an agent to stimulate the healing of wounds. (google.co.uk)
  • A method as claimed in any one of the preceding claims wherein the hydrogel precursor is dissolved in a mixture of 75% to 85% by weight water and 15% to 25% by weight propylene glycol. (google.co.uk)
  • A method as claimed in any one of the preceding claims wherein the ratio by volume of the hydrogel precursor solution to the coherent fibre structure is (20 to 70):1. (google.co.uk)
  • 12. The contact lens of claim 2 wherein said polymerization product is a hydrogel. (google.com)
  • toughness
  • Bakarich SE, in het Panhuis M, Beirne S, Wallace GG, Spinks GM (2013) Extrusion printing of ionic-covalent entanglement hydrogels with high toughness. (springer.com)
  • The platelets act as cross-links to modify molecular functions to enable the hydrogels to have superior elasticity and toughness that resembles closely that of biological tissue. (wikipedia.org)
  • necrotic
  • Sustained-release drug delivery systems Providing absorption, desloughing and debriding of necrotic and fibrotic tissue Hydrogels that are responsive to specific molecules, such as glucose or antigens, can be used as biosensors, as well as in DDS. (wikipedia.org)
  • hydrogen bonds
  • Additionally, the production of chitosan-based hydrogel using the interaction of hydrogen bonds technology is simulated in Aspen Plus generating the mass and energy balances in order to realize the technical and economic assessment of the process. (springer.com)
  • responsive
  • The stimulus-sensitivity of hydrogels allow for a responsive release system where the hydrogels can be designed to deliver the drug in response to changes in condition of the body. (wikipedia.org)