Nanoparticles for use in reactive porous polymer latex films

Mazengarb, SA, 2006. Nanoparticles for use in reactive porous polymer latex films. PhD, Nottingham Trent University.

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Abstract

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 n 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.

Item Type:	Thesis
Description:	The investigation which is the subject of this report was initiated by the director of CBD Sector, Defence Science and Technologies Laboratory (Dstl) Porton Down and was carried out under the terms of Contract No. RD013-930312.
Creators:	Mazengarb, S.A.
Date:	2006
ISBN:	9781369324648
Identifiers:	Number Type PQ10290215 Other
Divisions:	Schools > School of Science and Technology
Record created by:	Laura Ward
Date Added:	23 Jun 2021 13:19
Last Modified:	17 Oct 2023 15:08
URI:	https://irep.ntu.ac.uk/id/eprint/43168

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