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Microfibrillated cellulose: optimisation of production techniques

Riley, Martin Jeffrey (2017)
D.Eng. thesis, University of Birmingham.

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This thesis deals with the development of a microfibrillated cellulose based product from Imerys, made from wood pulp using a stirred media mill. Applications for microfibrillated cellulose are explored. Parameters for the generation of microfibrillated cellulose in the stirred media mill are tested for the formulation of a product with the greatest increase to the strength of paper. Models used in milling are applied to the milling of cellulose and calcium carbonate. Based on the models, ways of finding the most energy efficient process for future new materials and mills are explored. Improvements to models are suggested for both the general case of particle size reduction and the specific case of cellulose milling. A study of the energy transfer mechanisms in the mill and how they relate to the kinetic energy of the media is performed using Positron Emission Particle Tracking. The relationships between the distributions of media kinetic energy thus found and the products of milling are analysed. Modifications to the mill are made based upon these findings and tested. An environmental life-cycle assessment is performed of the product, which tests the overall environmental impacts of including microfibrillated cellulose as a strength aid in paper.

Type of Work:D.Eng. thesis.
Supervisor(s):Rowson, Neil and Greenwood, Richard
School/Faculty:Colleges (2008 onwards) > College of Engineering & Physical Sciences
Department:School of Chemical Engineering
Additional Information:

Thesis is under an option D embargo until 31/07/2021

Subjects:QD Chemistry
TP Chemical technology
Institution:University of Birmingham
ID Code:7640
This unpublished thesis/dissertation is copyright of the author and/or third parties. The intellectual property rights of the author or third parties in respect of this work are as defined by The Copyright Designs and Patents Act 1988 or as modified by any successor legislation. Any use made of information contained in this thesis/dissertation must be in accordance with that legislation and must be properly acknowledged. Further distribution or reproduction in any format is prohibited without the permission of the copyright holder.
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