Use this URL to cite or link to this record in EThOS: http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.550347
Title: Synthesis and characterisation of materials obtained by living radical polymerisation
Author: Metanawin, Tanapak
Awarding Body: University of Leeds
Current Institution: University of Leeds
Date of Award: 2011
Availability of Full Text:
Access from EThOS:
Abstract:
The syntheses of block copolymers, such as PS-b-POMA, PMAETC-b- POMA and PEO-b-PMAETC, were successfully carried out via RAFT polymerisation. These block copolymers formed well defined micelle. structures in either water or methanol. The sequential supramolecular self- assembly technique was used to synthesise the required hybrid colloids. The colloids included micelles, emulsion particles, and miniemulsion particles. In this technique, the colloids were prepared in water. Then, the nanoparticles, such as Cso and Pd, in a "solution" that was miscible with water were added into the colloid dispersion. The nanoparticles spontaneously assembled to from stable hybrid colloids. The dialysis process was used to transfer the hybrid colloid into aqueous media. The Csolmicelles dispersions were stable for at least 3 months at a loading of Cso of 2:1 (by molar ratio). The systems based on Csolmicelles in an aqueous medium have potential in photodynamic therapeutic applications (POT). In the biological study of cells, it was shown that the Cso/micelles bring about cell killing behaviour as a function of the irradiation time while not bring toxic in the dark. The supramolecular self- assembly of Pd metal particles with micelles was achieved without adding any reducing agent. The nucleation and the growth of the Pd crystals were investigated, as a function of time, of temperature and of loading amount of the Pd precursor. The Pd/micellar products could be used in catalyst applications. Both PMAETC-b-POMA and PEO-b-PMAETC, that contain thiophenyl units, might have the potential to crosslink micelles or miniemulsion species. They are also able to form hybrid colloids by self-assembly with such particles.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID: uk.bl.ethos.550347  DOI: Not available
Share: