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Title: Nanoparticles for use in reactive porous polymer latex films
Author: Mazengarb, Simon A.
ISNI:       0000 0001 3622 1874
Awarding Body: Nottingham Trent University
Current Institution: Nottingham Trent University
Date of Award: 2006
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Porous styrene divinylbenzene copolymers in the size range 50-100nm have been produced via a cross-linking emulsion copolymerisation technique. The effect of varying the initiator, surfactant and inert diluent type and concentration on particle size and specific surface area have been systematically evaluated. Toluene, xylene and heptane have been used as inert diluents to generate the internal porous network. Evaluation of the porosity has been carried out using nitrogen adsorption / desorption methods to calculate the BET specific surface area of the resulting latex and then comparing this with the theoretical surface area for a solid sphere of comparable size. The mean particle size was determined by photon correlation spectroscopy. Further evaluation of the nanoparticle porosity was achieved by interpreting the nitrogen desorption isotherm using the BJH equation to give a pore size distribution and using the Dubinin-Radushkevich equation to quantify the micropore volume. A kinetic study on the formation of porous nanoparticles resulted in the dependency on the concentration of potassium persulphate and sodium dodecylsulphate being calculated together with a value of h for comparison with the Smith - Ewart theory. The kinetics of the polymerisation of styrene using various redox couple ratios for initiation and different surfactants has been studied by dilatometry to optimise initiation efficiency and to produce hydrolysis resistant strong acid sulphonate functionality. Amine functionalisation of both styrene and porous nanoparticles with chitosan has been achieved and the catalytic potential of redox initiated porous nanoparticles in latex polymer film for the hydrolysis of ethyl formate has been examined and shown to be viable.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available