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Showing 1 to 20 of 808 for “"Hydrogel"”.
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Novel hydrogel polymers
Hydrogels may be conveniently described as hydrophilic polymers that are swollen by, but do not dissolve in water. In this work a series of copolymer hydrogels and semi-interpenetrating polymer networks based on the monomers 2-hydroxyethyl methacrylate, N-vinyl pyrrolidone and N'N' dimethyl …
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Novel hydrogel polymers
Hydrogels are a unique class of polymers which swell, but do not dissolve in water. A range of 2-hydroxyethyl methacrylate based copolymer hydrogels have been synthesised and are described in this thesis. Initially, hydrogels were synthesised containing acryloylmorpholine, N,N-dimethyl acrylamide …
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Characterization of biological hydrogel barriers
Biological hydrogel barriers include mucus, bacterial biofilms, fungal biofilms, and others. Biofilms are polysaccharide hydrogels. Biofilms are commonly found in the lungs of cystic fibrosis patients. Cystic fibrosis (CF) patients are susceptible to these types of chronic infections because their …
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Transport phenomena in hydrogel membranes
… of alkali and alkaline earth metal salts through hydrogel membranes are investigated. Although of relevance to aqueous separations in general, it was with their potential application in sensors that this work was particularly concerned. In order to study the effect that the nature of the solute …
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Computational modelling of hydrogel therapies
Myocardial infarctions (heart attacks) are a type of cardiovascular disease that affects a large population of people around the world. They lead to the death of heart tissue, which is eventually replaced by scar tissue in a non-reversible process. Scar tissue does not behave like normal heart …
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Rheometric measurement of hydrogel toughness
As soft physical gels become more popular due to their biological applications, there is increased interest in measuring mechanical properties such as toughness. However, traditional tensile testing methods do not work for such materials due to the intrinsic softness of the material. We present a …
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Polymer hydrogel nanoparticles and their networks
… responsive hydroxypropyl cellulose (HPC) hydrogel nanoparticles have been synthesized and characterized. The HPC particles were obtained by chemically crosslinking collapsed HPC polymer chains in water-surfactant (dodecyltrimethylammonium bromide) dispersion above the lower critical …
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Optical Printing of Multiscale Hydrogel Structures
<p>Hydrogel has been a promising candidate to recapitulate the chemical, physical and mechanical properties of natural extracellular matrix (ECM), and they have been widely used for tissue engineering, lab on a chip and biophotonics applications. A range of optical fabrication technologies such as …
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Characterisation and modification of hydrogel polymers
… The first being the characterisation of hydrogel polymers in both their hydrated and dehydrated states and the second some aspects of the structural modification of polymers. The characterisation of hydrogel polymers in their dehydrated state (xerogels) involves such techniques as …
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Drug/Water interactions in hydrogel matrices
… effects of the antibiotics on water structure in hydrogel membrane preparations In which the equilibrium water content (E.W.C.) and constituent amounts of freezing and non-freezing water ware varied were also investigated using D.S.C. The permeability of water swollen hydrogel preparations to …
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Hydrogel cell encapsulation for tissue engineering
… generating size- and shape-controlled cell-laden hydrogels are described in the context of potential modular assembly for conferring greater control over the geometry of homotypic and heterotypic cell arrangements within engineered tissues. Then, a method for producing cell-loaded microfluidic …
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Hydrogel Machines - Design, Manufacturing, and Applications
Hydrogels are polymer networks infiltrated with water. Natural hydrogels constitute the major components of the human body such as muscles and cartilages; and synthetic hydrogels have been widely used in applications that closely interact with biological organisms, ranging from tissue engineering, …
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Photo-crosslinked Surface Attached Thin Hydrogel Layers
Stimuli sensitive polymers and hydrogels respond with large property changes to small physical and chemical stimuli (e.g. temperature, pH, ionic strength). The bulk behavior of these polymers is widely studied and they show an isotropic swelling. However, thin hydrogel layers of polymers on a …
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Tear and skin phospholipids:analysis and hydrogel analogues
… with the synthesis of phospholipids analogous to hydrogels. The work consists of two areas. The first area is the study of the phospholipids in the tear film, their nature and fate. The use of liquid chromatography mass spectrometry determined that the concentration of phospholipids in the tear …
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Modified Hydrogel Matrices in Fibre Optic Sensors
… chosen for specific sensor applications. Hydrogels can be described as polymers which swell in water. In addition to this, the presence of water in the polymer matrix offers some control of biocompatibility. They thus provide a medium through which rapid transport of a sensed species to an …
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Tear protein interaction with hydrogel contact lenses
… contact lens materials and also to novel hydrogels synthesised within the research group. Analysis of the identity and quantity of proteins absorbed to biomaterials revealed the importance of many factors on the absorption process. The effect of biomaterial structure, protein nature in …
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Bridging the lesioned spinal cord using hydrogel
… cavity using biomaterials 3 D. Injectable hydrogel for contusive injury model 4 E. Aims of Study 5 II. MATERIALS AND METHODS 6 1. Animal and surgical procedures 6 2. Poly (phosphazene) hydrogel injection 6 3. Tissue processing 6 4. Immunohistochemistry 7 5. Three dimensional reconstruction …
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Engineering hydrogel environments to direct cell fate
The advent of hydrogels for biological applications has sparked interest in the both the medical and engineering community in recent years as a means to investigate cellular level processes. An area that has shown promising application of hydrogel materials has been in the study of stem cell …
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Tribological properties of gradient-density hydrogel surfaces
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2023-12-01
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