Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 51 for “"diacrylate"”.
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INVESTIGATION OF THE MECHANICAL PROPERTIES OF POLY (ETHYLENE GLYCOL) DIACRYLATE BY NANOINDENTATION USING ATOMIC FORCE MICROSCOPY
… and the stiffness (S) of polyethylene glycol diacrylate (PEGDA) hydrogel matrices at the nanoscale. The effect of varying parameters in the fabrication of PEGDA hydrogels including monomer molecular weight, initiator concentration and rates of hydration were investigated via nanoindentation …
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Promotion and control of angiogenic activity in poly(ethylene glycol) diacrylate hydrogels for tissue engineering applications
… protein or peptide to poly(ethylene glycol) diacrylate hydrogels, thereby yielding a system which can be used to develop vascularized, functional engineered tissues. The field of tissue engineering has the capability of providing greatly needed biological organs and tissues for …
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Studying the effects of polymerization temperature, composition, and initiation rate on network structure formation by free radical photopolymerization of a low Tg̳ monoacrylate/diacrylate system
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1994.
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Fabrication of Micropatterned Hydrogels for Cell Culture
… and its derivative Polyethylene (glycol) Diacrylate (PEGDA) are indispensable synthetic hydrogels. In this thesis, hydrogels are studied for their chemical structure, physical and mechanical properties and gel formation. Typical hydrogels, i.e. agarose, polyethylene (glycol) diacrylate …
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Aspects of radiation curing
… beam induced polymerisation of dialkyltin diacrylates, as well as the UV and electron beam induced polymerisation of some novel silicon containing acrylates are discussed. The reactivity and film forming properties of these materials are compared with that of some commercial diluents such …
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Photo-responsive degradable poly (beta-amino ester) toward non-viral gene delivery
… amines to (2-nitro-1,3-phenylene)bis(methylene) diacrylate (NPBMD) as a UV-responsive segment. Non-responsive PBAE (control polymer) was also synthesized when a UV-nonresponsive monomer 1,3-phenylenebis(methylene) diacrylate (PBMD) was used. By changing the monomer type and diacrylate/amine …
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Degradable nanocomposite preformed particle gel for chemical enhanced oil recovery applications
… gel crosslinked with Poly (ethylene glycol) diacrylate and bentonite clay. Elastomeric rubber gel formed using 0.5% degraded preformed particle gel crosslinked with Poly(ethylene glycol) Diacrylate-200 is the most promising since it contains the least amount of degraded preformed particle gel …
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CHARACTERIZING THE MICRO-SCALE MECHANICAL PROPERTIES OF HYDROGELS AND CANCER CELLS
… laminin, Matrigel, and polyethylene glycol diacrylate (PEGDA), were tested with atomic force microscopy (AFM). We also determined the Young’s modulus (E) of hydrogels with different concentrations. E tended to increase with increased concentration.
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Development of photo-patterned composite structures in microchannels for oil reservoir research
… are composed of tricyclodecane dimethanol diacrylate and stearic-acid treated calcium carbonate particles. This lithographic method is simple, fast, economical, and versatile compared with previous fabrication methods used for two-phase porous media micromodel experiments. With the …
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Chemically and Photochemically Crosslinked Networks and Acid-Functionalized Mwcnt Composites
PTMO-urethane and urea diacrylates (UtDA, UrDA) were synthesized from a two-step reactions of bis (4-isocyanatocyclohexyl) methane (HMDI) with either α,Ï -hydroxy-terminated poly (tetramethylene oxide) (PTMO Mn 250, 1000, 2000 and 2900 g/mol) or α,Ï -aminopropyl-terminated PTMO and 2-hydroxyethyl …
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Photoalignement et stabilisation des cristaux liquides ferroélectriques
… le mélange se compose au départ d'un monomère de diacrylate portant un groupe azobenzène, d'un CLF et d'un initiateur pour la polymérisation. Les molécules azobenzènes sont des molécules photoactives qui sous l'influence d'une lumière polarisée linéairement peuvent subir un grand nombre de cycle …
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SYNTHESIS OF NOVEL BODIPY LIBRARIES AND THEIR APPLICATION IN BIOIMAGING
… development of a protein tag system based BODIPY diacrylate structure, this information was successfully used to solve the background issue of the dye. These work discovered useful biological and environmental sensors, and provided information on protein tag development.
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A potential route to hydrogel multifunctionalization utilizing encapsulation of acrylate-conjugated streptavidin
… chemical binding to poly(ethylene glycol) (PEG) diacrylate and dextran acrylate hydrogels. Such gels were made by photocrosslinking solutions of APN and streptavidin conjugated at various molar ratios, along with a gelling polymer under an ultraviolet (UV) lamp. Acryl group conjugation was …
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Development of collagen-based scaffolds for differentiation of induced pluripotent stem cells
… developed by fabricating poly(ethylene glycol) diacrylate (PEGDA) into the collagen hydrogel to form an interpenetrating network (IPN). Stability test showed significant improvement of shrinkage resistance compared to pure collagen hydrogel. Assessment of biocompatibility showed high cell …
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Functional thin film polymers for biopassivation of neuroprosthetic implants
… methacrylate-co-ethylene glycol diacrylate), was developed as a platform for easy surface functionalization of neural probe coatings with bioactive molecules.
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Design and Fabrication of a Mask Projection Microstereolithography System for the Characterization and Processing of Novel Photopolymer Resins
… photopolymer was poly (propylene glycol) diacrylate, which was used to benchmark the designed MPμSL system. This included the achievable XY resolution (212 micrometers), minimum layer thickness (20 micrometers), vertical build rate (360 layers/hr), and maximum build volume (6x8x36mm3). …
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Curing Characteristics of Photopolymer Resin With Dispersed Glass Microspheres in Vat Polymerization 3D Printing
… measure the curing characteristics of diacrylate/epoxy photopolymer resin with dispersed glass microspheres. The experiments show that the curing depth, degree-of-cure, and surface roughness depend on both the light exposure dose and the filler fraction. We determine that the …
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Development of Polymer Monoliths for the Analysis of Peptides and Proteins
… were synthesized using polyethylene glycol diacrylate (PEGDA) as crosslinker. Photo-initiated copolymerization of polyethylene glycol methyl ether acrylate and PEGDA yielded an inert monolith that could be used for size exclusion liquid chromatography of peptides and proteins. This …
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The effects of PVP(FE(III)) catalyst and polymer molecular weight on gene delivery via biodegradable crosslinked polyethylenimine
… low toxicity by cross-linking 800 Da PEI with diacrylate cross-linkers using Michael addition. However, the synthesis was difficult to control, inconsistent, and resulted in polymers with a narrow range of molecular weights. In the present work, we utilized a heterogenous PVP(Fe(III)) catalyst …
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