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BAMI Seminars

Student chapter seminars in 2016: 

 

BAMI Seminar - September 2016

BAMI Seminar - August 2016

BAMI Seminar - July 2016

BAMI Seminar - May 2016

BAMI Seminar - April 2016

BAMI Seminar - March 2016

BAMI Seminar - February 2016

BAMI Seminar - January 2016

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RAJ Praveena 3X3
Praveena Raj, PhD candidate, BioPRIA/Department of Chemical Engineering

 

Friday 10th July 2015, 12.30PM to 1.30PM
Room G03, BioPRIA, 15 Alliance Lane (Building 59), Clayton Campus

Moderator:
Zhiyong He, PhD candidate, BioPRIA/Department of Chemical Engineering

Engineering the colloidal structure of cellulose nanofibres using polyelectrolytes to control filtration and sheet properties

Abstract:

The interaction between cellulose nanofibres in the presence of two types of polyelectrolytes; linear and branched; cationic polyacrylamide (CPAM) and polyethylenimine (PEI) respectively, were analysed by carrying out sedimentation experiments to obtain the gel points. The gel point of a suspension is a valuable parameter which is the lowest fibrous volume fraction at which all the primary flocs are interconnected and forms a self-supporting network. The lower the gel point, the faster the drainage time to produce a sheet and the higher the porosity of the final sheet formed. In this study, we developed a master curve which showed that the independent variable controlling the behaviour of nanocellulose suspensions and its composite is the structure of the flocculated suspension which is best quantified as the gel point. This was independent of the type of polyelectrolyte used. We also found that the gel point partially controls the structure of the final sheet. Halving the gel point increased the air permeability of the sheet by 37% and 46% when CPAM and PEI were added respectively.

Presentation and Q&A session will be from 12.30PM - 1.00PM. Lunch will be served at 1.00 PM.

Enquiries: BAMI Student Chapter coordinators This email address is being protected from spambots. You need JavaScript enabled to view it. or This email address is being protected from spambots. You need JavaScript enabled to view it..

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Amini Negin

PhD Confirmation Seminar: Negin Amini, Department of Chemical Engineering

 

Friday 3rd July 2015, 1PM - 3PM
Conference Room 209, Building 69, Department of Chemical Engineering.

Microwave pre-treatment of lignocellulosic biomass

Abstract:

There has been a growing interest in the production of chemicals from environmentally friendly renewable biomass. Chemicals production from biomass is favoured since it is carbon neutral. A shift towards lignocellulosic feedstock has peaked in recent years and has been driven by a need to avoid the use of food resources. However, there has yet to be a breakthrough on efficient methods for transformation, in terms of cost and quality of product.

Preliminary results of an exploratory research project investigating the use of solvents and microwave irradiation to pre-treat Eucalyptus regnanssawdust to expose the sugars are presented. From the mild conditions used, it was found that approximately 20 to 50 mol% of the carbon 5 sugars were solubilized. Formalin showed the highest yield of carbon 5 sugars at 50.79 mol% while propylene glycol only converted 18.08 mol%. Ethylene glycol was used as a case study to investigate the effect of microwave hold time and it was established that higher yields of carbon 5 sugars are achieved with longer hold times.

Enquiries to Janette Anthony via This email address is being protected from spambots. You need JavaScript enabled to view it. or 99053456

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DAI Jinhuo3x3Jinhuo Dai, PhD candidate, School of Chemistry

 

Friday 12th June 2015, 12.30 PM - 1.30 PM
Room G03, BioPRIA, 15 Alliance Lane (Building 59), Clayton Campus

Moderator: Praveena Raj, PhD Student, BioPRIA/Department of Chemical Engineering

Lignin depolymerisation with chemical methods to produce fine chemicals

Abstract:

Different methods with different lignin have been investigated. Lignin was successfully depolymerised by TBDMP, catalysed by copper with different ligands as a catalyst. Two ligands were considered as the best one to depolymerise lignin within 12 hours. Also, different lignin were analysed by GPC and isolated by methanol to give methanol an insoluble fraction, which should have a high molecular weight with low polydispersity. Another catalyst-formate ionic liquid has been tried to depolymerise oxidised lignin.

Presentation and Q&A session will be from 12.30 PM - 1.00 PM. Lunch will be served at 1.00 PM.

Enquiries: BAMI Student Chapter coordinators This email address is being protected from spambots. You need JavaScript enabled to view it. or This email address is being protected from spambots. You need JavaScript enabled to view it..

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VARANASI Swambabu 3X3

Dr Swambabu Varanasi, BAMI Research Fellow


Friday 15 May 2015,
12.30 PM - 1.30 PM
Room G03, BioPRIA,15 Alliance Lane (Building 59), Clayton Campus

Cellulose nanofibre based barrier materials

Abstract:

Paper is widely used in packaging applications and is biodegradable and therefore perfectly safe for the environment. However, the hydrophilic nature of cellulose, due to the OH sites in the basic unit of cellulose and fiber network porosity, limits the water-vapor-permeability (WVP) and oxygen permeability (OP) of paper. Paper is often associated with other materials, such as plastic materials, wax and aluminum, for their good barrier properties that could be advantageously combined with paper stiffness. These materials suffer from serious environmental issues. The addition of these materials to paper makes the paper very difficult and inefficient to recycle. My research aimed to develop a novel cellulose nanofibre and/or biopolymer based paper coating that functions as an effective replacement for polymeric materials and wax coatings used in the paper industry.

Cellulose nanofibre paper has low OP compared to any other polymer/bio-polymer based packaging material due to their small pore size. However, WVP of nanofibre sheet is high because of inherent sensitivity to water vapour (hydrophilic nature) of cellulose. Keeping low OP, while reducing the WVP is a key challenge to the utilisation of cellulose nanofibres for barrier material applications. This challenge can be possibly addressed by making the cellulose nanofibres hydrophobic with suitable surface modification or by adding inert fillers. My presentation gives an overview on effect of nanoplatelets addition on WVP of nanofibre paper.

Presentation and Q&A session will be from 12.30 PM - 1.30 PM. Lunch will be served at 1.00 PM.

Enquiries: BAMI Student Chapter coordinators This email address is being protected from spambots. You need JavaScript enabled to view it. or This email address is being protected from spambots. You need JavaScript enabled to view it.

 

 

 

 

 

 

 

 

 

 

 

 

 

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