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Simulation, synthesis, and character...

Suthar, Kamleshkumar J.

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Simulation, synthesis, and characterization of hydrogels and nanocomposite gels.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Simulation, synthesis, and characterization of hydrogels and nanocomposite gels./
作者:	Suthar, Kamleshkumar J.
面頁冊數:	177 p.
附註:	Source: Dissertation Abstracts International, Volume: 71-01, Section: A, page: 0310.
Contained By:	Dissertation Abstracts International71-01A.
標題:	Applied Mechanics. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3392161
ISBN:	9781109573510

Simulation, synthesis, and characterization of hydrogels and nanocomposite gels.
Suthar, Kamleshkumar J.

Simulation, synthesis, and characterization of hydrogels and nanocomposite gels. - 177 p.

Source: Dissertation Abstracts International, Volume: 71-01, Section: A, page: 0310.

Thesis (Ph.D.)--Western Michigan University, 2009.

Stimuli-responsive gels are three-dimensional, cross-linked polymeric materials that undergo large physical change in response to the environmental stimuli, like temperature, pH, electrical potential, and irradiation. Ferrogels are colloidal-dispersion of magnetic nanoparticles in the hydrogel network. The magnetic nanoparticles are attached to the polymeric network by different adhesive forces; as a result, it becomes sensitive to the applied magnetic field.

ISBN: 9781109573510Subjects--Topical Terms:

1018410
Applied Mechanics.

Simulation, synthesis, and characterization of hydrogels and nanocomposite gels.
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245 1 0 $a Simulation, synthesis, and characterization of hydrogels and nanocomposite gels.
300 $a 177 p.
500 $a Source: Dissertation Abstracts International, Volume: 71-01, Section: A, page: 0310.
500 $a Adviser: Muralidhar K. Ghantasala.
502 $a Thesis (Ph.D.)--Western Michigan University, 2009.
520 $a Stimuli-responsive gels are three-dimensional, cross-linked polymeric materials that undergo large physical change in response to the environmental stimuli, like temperature, pH, electrical potential, and irradiation. Ferrogels are colloidal-dispersion of magnetic nanoparticles in the hydrogel network. The magnetic nanoparticles are attached to the polymeric network by different adhesive forces; as a result, it becomes sensitive to the applied magnetic field.
520 $a The main objective of this research is the simulation, synthesis, and characterization of the hydrogel and ferrogel. Simulation of the hydrogel response was performed for various environmental stimuli using a multiphysics finite element analysis software, COMSOL. The pH and electrical response of the hydrogel in steady state and transient conditions are investigated. These simulations also include the preliminary results of the ferrogel response in the magnetic field. Ferrogels were synthesized using magnetite (Fe 3O4) and meghamite (Fe2O3) nanoparticles in the range 5 nm to 50 nm. These investigations included process optimization, characterization, and correlation of properties with process parameters. These samples are characterized by Ultra Small Angle X-ray Scattering, Transmission Electron Microscopy, Differential Scanning Calorimetry,DC Superconducting Quantum Interference Device magnetometer for the particle distribution, temperature phase transition, and magnetization.
520 $a Simulation of the hydrogel response to the external stimuli pH, and an electric field has successfully been demonstrated. The effect of buffer concentration and the fixed charge density on the swelling characteristics are studied in varying pH condition. In addition, the pH responsiveness is simulated for the chemical sensing reactive-hydrogels, like blood glucose level sensing. Gel synthesis used Design of Experiment methods to optimize the cross-linking (1-8%), and particle-loading parameters (1-14%) for N-Isopropylacrylamide based gels in the presence of magnetic fields. Lower particle size (>10nm) Fe3O4 surfactant layer coated particles provided single particle distributions without any unwanted agglomeration and aggregate distributions. Magnetic moments of the gels were found in the range 0.5 to 5emu/gram depending on different synthesis parameters with relatively stable phase-transition temperature around 33°C. Overall, the dissertation has been successful in simulation of these stimuli-responsive gels and established new methodology of correlation using different characterization techniques.
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