HYDROGEL PPT.pptx
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this ppt is about hydrogel.A hydrogel is a three-dimensional(3D) network of hydrophilic polymers that can swell in water and hold a large amount of water while maintaining the structure due to chemical or physical cross-linking of individual polymer chains. applications Flexibility of hydrogels, which is because of their water content, makes it possible to use them in different condition ranging from industrial to biological fields
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Presentation: Hydrogel
This document summarizes the history and discovery of hydrogels. It discusses how Otto and Lim first proposed the use of PHEMA hydrogels in contact lenses in 1960. Lim synthesized some of the first hydrogel materials somewhat by accident in 1954. Since then, hydrogels have found applications in drug delivery, tissue engineering, contact lenses, and other biomedical uses due to their biocompatibility and ability to absorb large amounts of water. The document also discusses stimuli-responsive and "smart" hydrogels that can release drugs in response to environmental triggers like pH, temperature, and electric fields.
hydro gels compositions and applications
Hydrogels are three-dimensional polymer networks that can absorb large amounts of water but do not dissolve. They have properties similar to natural tissue and are biocompatible. Hydrogels can be classified based on their degree of swelling, porosity, biodegradability, and type of crosslinking. They are used in a variety of biomedical applications including drug delivery, contact lenses, and tissue engineering due to their water retention and flexibility. Hydrogels can be designed to respond to environmental stimuli like temperature or pH changes to control drug release. Current research is developing self-healing hydrogels for uses like medical sutures and targeted drug delivery.
Hydrogels
This document discusses hydrogels, which are 3D polymer networks that can absorb large amounts of water while maintaining their shape. It provides a brief history of hydrogels and classifications based on generation. Stimuli-responsive or "smart" hydrogels that change properties in response to environmental stimuli are highlighted. Characterization techniques and applications of hydrogels in biomedical areas like drug delivery, cell encapsulation, and tissue engineering scaffolds are summarized.
Hydrogels introduction and applications in biology and en
Hydrogels are water-swollen, crosslinked polymers that can absorb large amounts of water. They have a variety of applications including in soft contact lenses, drug delivery, wound healing, and tissue engineering. Hydrogels are advantageous for tissue engineering and cell culture as they can mimic extracellular matrix, provide structural support, and allow for nutrient transport. They are also useful for drug delivery as they allow controlled release of molecules. The document discusses the properties, types, advantages and uses of hydrogels.
Hydrogels
Hydrogels are three-dimensional network of hydrophilic cross-linked polymer that do not dissolve but can swell in water or can respond to the fluctuations of the environmental stimuli
Hydrogels are highly absorbent (they can contain over 90% water) natural or synthetic polymeric networks
Hydrogels also possess a degree of flexibility very similar to natural tissue, due to their significant water content
History and-applications-of-hydrogels
The document discusses the history and applications of hydrogels. It begins by defining hydrogels as polymeric matrixes that swell in water due to their affinity for water. It then discusses how hydrogels have drawn increasing interest in recent decades for their biocompatibility and use in biomedical applications like drug delivery, wound healing, and tissue engineering. The document provides an overview of the development of hydrogels over time, from early crosslinked hydroxyethyl methacrylate hydrogels to current research utilizing their stimulus-responsive and tunable properties in various fields.
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Hydrogels are water-swollen polymer networks that can absorb large amounts of water. They have numerous pharmaceutical and biomedical applications due to their unique bulk and surface properties. Hydrogels can be designed to respond to environmental stimuli like pH, temperature, and ionic strength. This allows for controlled drug release in response to changes in the surrounding conditions. Hydrogels find use in various drug delivery applications like oral, ocular, and subcutaneous delivery due to their biocompatibility and ability to encapsulate and release bioactive compounds.
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This document discusses hydrogels, which are cross-linked polymer networks that can absorb large amounts of water. It classifies hydrogels based on their structure, charge, and mechanism of drug release. It also outlines common monomers used to synthesize hydrogels and various preparation methods like crosslinking. The document notes advantages like biocompatibility and ability to inject hydrogels, as well as disadvantages such as low mechanical strength. It concludes that hydrogels can be used for targeted drug delivery, as biosensors, and in wound healing and tissue regeneration due to their responsiveness to stimuli.
Recommended
Presentation: Hydrogel
This document summarizes the history and discovery of hydrogels. It discusses how Otto and Lim first proposed the use of PHEMA hydrogels in contact lenses in 1960. Lim synthesized some of the first hydrogel materials somewhat by accident in 1954. Since then, hydrogels have found applications in drug delivery, tissue engineering, contact lenses, and other biomedical uses due to their biocompatibility and ability to absorb large amounts of water. The document also discusses stimuli-responsive and "smart" hydrogels that can release drugs in response to environmental triggers like pH, temperature, and electric fields.
hydro gels compositions and applications
Hydrogels are three-dimensional polymer networks that can absorb large amounts of water but do not dissolve. They have properties similar to natural tissue and are biocompatible. Hydrogels can be classified based on their degree of swelling, porosity, biodegradability, and type of crosslinking. They are used in a variety of biomedical applications including drug delivery, contact lenses, and tissue engineering due to their water retention and flexibility. Hydrogels can be designed to respond to environmental stimuli like temperature or pH changes to control drug release. Current research is developing self-healing hydrogels for uses like medical sutures and targeted drug delivery.
Hydrogels
This document discusses hydrogels, which are 3D polymer networks that can absorb large amounts of water while maintaining their shape. It provides a brief history of hydrogels and classifications based on generation. Stimuli-responsive or "smart" hydrogels that change properties in response to environmental stimuli are highlighted. Characterization techniques and applications of hydrogels in biomedical areas like drug delivery, cell encapsulation, and tissue engineering scaffolds are summarized.
Hydrogels introduction and applications in biology and en
Hydrogels are water-swollen, crosslinked polymers that can absorb large amounts of water. They have a variety of applications including in soft contact lenses, drug delivery, wound healing, and tissue engineering. Hydrogels are advantageous for tissue engineering and cell culture as they can mimic extracellular matrix, provide structural support, and allow for nutrient transport. They are also useful for drug delivery as they allow controlled release of molecules. The document discusses the properties, types, advantages and uses of hydrogels.
Hydrogels
Hydrogels are three-dimensional network of hydrophilic cross-linked polymer that do not dissolve but can swell in water or can respond to the fluctuations of the environmental stimuli
Hydrogels are highly absorbent (they can contain over 90% water) natural or synthetic polymeric networks
Hydrogels also possess a degree of flexibility very similar to natural tissue, due to their significant water content
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The document discusses the history and applications of hydrogels. It begins by defining hydrogels as polymeric matrixes that swell in water due to their affinity for water. It then discusses how hydrogels have drawn increasing interest in recent decades for their biocompatibility and use in biomedical applications like drug delivery, wound healing, and tissue engineering. The document provides an overview of the development of hydrogels over time, from early crosslinked hydroxyethyl methacrylate hydrogels to current research utilizing their stimulus-responsive and tunable properties in various fields.
chapter on Hydrogel
Hydrogels are water-swollen polymer networks that can absorb large amounts of water. They have numerous pharmaceutical and biomedical applications due to their unique bulk and surface properties. Hydrogels can be designed to respond to environmental stimuli like pH, temperature, and ionic strength. This allows for controlled drug release in response to changes in the surrounding conditions. Hydrogels find use in various drug delivery applications like oral, ocular, and subcutaneous delivery due to their biocompatibility and ability to encapsulate and release bioactive compounds.
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This document discusses hydrogels, which are cross-linked polymer networks that can absorb large amounts of water. It classifies hydrogels based on their structure, charge, and mechanism of drug release. It also outlines common monomers used to synthesize hydrogels and various preparation methods like crosslinking. The document notes advantages like biocompatibility and ability to inject hydrogels, as well as disadvantages such as low mechanical strength. It concludes that hydrogels can be used for targeted drug delivery, as biosensors, and in wound healing and tissue regeneration due to their responsiveness to stimuli.
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The document discusses hydrogels, including their classification, advantages, disadvantages, types, monomers used in synthesis, methods of preparation, characterization, uses, and pharmaceutical applications. Hydrogels are crosslinked polymer networks that can absorb large amounts of water. They are biocompatible and can be used for controlled drug release in applications such as contact lenses, wound dressings, and tissue engineering scaffolds.
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analytical machines,
advantages,
disadvantages,
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historical background,
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advantages,
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HYDROGEL PPT.pptx
- 1. HYDROGELS A hydrogel is a three-dimensional(3D) network of hydrophilic polymers that can swell in water and hold a large amount of water while maintaining the structure due to chemical or physical cross- linking of individual polymer chains. First reported by Wichterle and Lim in 1960. They are first biomaterials designed for use in human body and are finding widespread biomedical applications.
- 2. SOME IMPORTANT POINTS: • By definition, water must constitute at least 10% of the total weight (or volume) for a material to be a hydrogel. • Hydrogels on exposed in a thermodynamically compatible solvent (water or any biological fluid), can entrap a large fraction of solvent within the pores or interstitial spaces and can achieve a fully swollen state. • The hydrophilicity of the network is due to the presence of hydrophilic groups such as –NH2, -COOH, -OH, -CONH2, -CONH- and SO3H. • The presence of cross-links makes it resistant to dissolution in the aqueous medium.
- 3. Classification On the basis of Preparation : - Homo-polymer - Copolymer - Semi-interpenetrating network - Interpenetrating network On the basis of cross linking : - Chemical hydrogels - Physical hydrogels
- 4. Application of Hydrogels : • Flexibility of hydrogels, which is because of their water content, makes it possible to use them in different condition ranging from industrial to biological fields. • Hydrogels are biocompatible • In drug delivery • In contact lenses • In agricultural process • In wound dressing etc…
- 5. Disadvantages of Hydrogels : • Hydrogels are expensive • Hydrogels have low mechanical strength • Difficulty in handling • They are non-adherent and may need to be secured by a secondary dressing • Difficulty in loading • Difficult to be sterilized