Papers by Malcolm Mackley
International Polymer Processing Journal of the Polymer Processing Society
ABSTRACT
Journal of Polymer Science: Polymer Physics Edition, 1976
Experimental observations are reported of the behavior of solutions between two rotating parallel... more Experimental observations are reported of the behavior of solutions between two rotating parallel rollers where the form of the flow field between corotating rollers corresponds to that of a col which has nonorthogonal asymptotes. The obliquity of the asymptotes of the flow gives a direct measure of the relative magnitude of the constituent pure shear and rotational components of the flow field.
Synfacts, 2010
This paper presents process characteristics and proof of concept reactions for a newly developed ... more This paper presents process characteristics and proof of concept reactions for a newly developed microreactor system, termed the Cambridge Disc Microreactor (CDM), using plastic Microcapillary Flow Discs (MFDs). These flat reactor discs were constructed from a flexible, temperature resilient, solvent resistant fluoropolymer Microcapillary Film (MCF) comprising of 10 parallel capillary channels with mean hydraulic diameters typically between 150 and 400 µm. The MFDs were heated inside the microreactor via conductive heat transfer from two heated surfaces, which were in contact with the flat outer surfaces of the disc. This allowed continuous flow processing of liquid phase reactions through the reactor at elevated temperatures and pressures at a precisely controlled residence time. The process characteristics of the reactor system were established experimentally by investigating the hydraulic response and the temperature profile or modelled analytically such that the residence time characteristics inside the device could be predicted. A series of organic chemical reactions, namely electrophilic
Journal of Imaging Science and Technology, 2009
This article links measurements of ink jetting perfor-mance in drop-on-demand printing with the h... more This article links measurements of ink jetting perfor-mance in drop-on-demand printing with the high-frequency rheological properties of model viscoelastic fluids containing linear polymers with various molecular weights. Jet formation and evolution were studied for solutions of ...
The Chemical Engineering Journal, 1993
ABSTRACT
International Journal of Material Forming, 2008
This paper gives a brief overview of microstructure and rheology that have been observed for a ra... more This paper gives a brief overview of microstructure and rheology that have been observed for a range of carbon nanotube (CNT) suspensions. In general, untreated CNT suspensions show a much higher level of observable optical microstructure reflecting their preference to aggregate; they also show higher levels of viscoelasticity over treated CNT suspensions. An unexpected Helical Band texture for untreated CNTs is reported together with a series of parallel plate optical observations showing a broad spectrum of behaviour for different shear conditions. Both steady shear and linear viscoelastic data are presented for treated and untreated systems.
The way in which biomass can attach and detach to itself and other structures is of importance in... more The way in which biomass can attach and detach to itself and other structures is of importance in a number of areas of bioscience and technology [J. Tampion, M.D. Tampion, Immobilized Cells: Principles and Applications, Cambridge Studies in Biotechnology, CUP, Cambridge, 1987; [1] M. Fletcher, The attachment of bacteria to surfaces in aquatic environments, in: D.C. Ellwood, J. Melling, P. Rutter (Eds.), Adhesion of Microorganisms to Surfaces, Academic Press, London, 1979, p. 87] [2]. Fluid flow will affect the situation [J.M. Lackie, Adhesion from flow, in: A.S.G. Curtis, J.M. Lackie (Eds.), Measuring Cell Adhesion, Wiley, Chichester, 1991, p. 41] [3] and this letter reports, for the first time, direct in situ observations of the way flowing biomass can deposit onto a fibrous structure and also how other flow conditions are able to re-suspend the biomass. In particular, fibre intersections are identified as regions of significant importance. The observations are of general interest in relation to biomass aggregation, growth and break-up and of specific relevance to filtration processes and immobilized bioreactor design.
Polymer, 1992
... Acknowledgements The authors wish to thank Dr Wim Bras for his help with the experiments perf... more ... Acknowledgements The authors wish to thank Dr Wim Bras for his help with the experiments performed at Daresbury Labora-tory, Dr Simon Hanna for the ... TJ, Spontak, RJ and Windle, AH Polymer in press 4 Hanna, S. and Windle, AH Polymer 1988, 29, 207 5 Mackley, MR Mol. ...
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Papers by Malcolm Mackley