Amaka Onyianta

Amaka Onyianta

Dr Amaka Onyianta

Research Fellow

Biography

Amaka studied Industrial Chemistry in Nigeria. She worked as a Technologist in her home university for 2 years before moving to The United Kingdom for further studies. She completed her Master's degree in Polymers, colorants and fine chemicals, with distinction, under the supervision of Prof Jim Guthrie at the University of Leeds in 2015. Her Master's research project was on hydrogel systems for fire retardant windows, in collaboration with Pyroquard UK Ltd. She started her PhD at Edinburgh Napier University in 2015, having received the Edinburgh Napier University's anniversary studentship. Her PhD research is was on "surface functionality in nanocellulose processing and composite formulations". She has also collaborated with top material scientists at the University of Genoa, Italy, under the Erasmus+ traineeship programme. Amaka is currently working on the biomedical applications of nanocellulose as a Research Fellow under the Nanomaterials Unit of the School of Engineering and Built Environment.

Esteem

Conference Activity

  • SEBE Best Paper Award (Runner-up)

 

Fellowships and Awards

  • The Perkin Price (School of Chemistry, University of Leeds)

 

Membership of Professional Body

  • Member, Royal Society of Chemistry (MRSC)

 

Date


7 results

High aspect ratio cellulose nanofibrils from macroalgae Laminaria hyperborea cellulose extract via a zero-waste low energy process

Journal Article
Onyianta, A. J., O’Rourke, D., Sun, D., Popescu, C., & Dorris, M. (2020)
High aspect ratio cellulose nanofibrils from macroalgae Laminaria hyperborea cellulose extract via a zero-waste low energy process. Cellulose, 27(14), 7997-8010. https://doi.org/10.1007/s10570-020-03223-5
Homogeneous high aspect ratio cellulose nanofibrils (CNFs) were prepared from Laminaria hyperborea (LH) seaweed cellulose without any initial mechanical, biological or chemica...

A process for deriving high quality cellulose nanofibrils from Water hyacinth invasive species

Journal Article
Sun, D., Onyianta, A. J., O’Rourke, D., Perrin, G., Popescu, C., Saw, L. H., …Dorris, M. (2020)
A process for deriving high quality cellulose nanofibrils from Water hyacinth invasive species. Cellulose, 27(2020), 3727–3740. https://doi.org/10.1007/s10570-020-03038-4
In this study, surface chemistry, the morphological properties, water retention values, linear viscoelastic properties, crystallinity index, tensile strength and thermal prope...

Surface Functionality in Nanocellulose Processing and Composite Formulations

Thesis
Onyianta, A. Surface Functionality in Nanocellulose Processing and Composite Formulations. (Thesis)
Edinburgh Napier University. Retrieved from http://researchrepository.napier.ac.uk/Output/2025207
Cellulose nanofibrils (CNF) are cellulose nanomaterials with desirable properties and offer great potentials to be applied in diverse fields. While various pre-treatments have...

High-shear rate rheometry of micro-nanofibrillated cellulose (CMF/CNF) suspensions using rotational rheometer

Journal Article
Vadodaria, S. S., Onyianta, A. J., & Sun, D. (2018)
High-shear rate rheometry of micro-nanofibrillated cellulose (CMF/CNF) suspensions using rotational rheometer. Cellulose, 25(10), 5535–5552. https://doi.org/10.1007/s10570-018-1963-4
Suspensions of cellulose micro- and nanofibrils are widely used in coatings, fibre spinning, 3D printing and as rheology modifiers where they are frequently exposed to shear r...

The Effects of morpholine pre-treated and carboxymethylated cellulose nanofibrils on the properties of alginate-based hydrogels

Journal Article
Onyianta, A. J., Castellano, M., Dorris, M., Williams, R. L., & Vicini, S. (2018)
The Effects of morpholine pre-treated and carboxymethylated cellulose nanofibrils on the properties of alginate-based hydrogels. Carbohydrate Polymers, 198, 320-327. https://doi.org/10.1016/j.carbpol.2018.06.084
The effects of varying percentage loadings of morpholine pre-treated cellulose nanofibrils (MCNF) and carboxymethylated cellulose nanofibrils (CMCNF) on the aqueous swelling, ...

Aqueous morpholine pre-treatment in cellulose nanofibril (CNF) production: comparison with carboxymethylation and TEMPO oxidisation pre-treatment methods

Journal Article
Onyianta, A. J., Dorris, M., & Williams, R. (2017)
Aqueous morpholine pre-treatment in cellulose nanofibril (CNF) production: comparison with carboxymethylation and TEMPO oxidisation pre-treatment methods. Cellulose, https://doi.org/10.1007/s10570-017-1631-0
In this study, pulped cellulose fibres were pre-treated with aqueous morpholine prior to mechanical disruption in the production of cellulose nanofibrils (CNF). The properties...

The Use of Sedimentation for the Estimation of Aspect Ratios of Charged Cellulose Nanofibrils

Conference Proceeding
Onyianta, A. J., & Williams, R. (2018)
The Use of Sedimentation for the Estimation of Aspect Ratios of Charged Cellulose Nanofibrils. In R. Fangueiro, & S. Rana (Eds.), Advances in Natural Fibre Composites, 195-203. https://doi.org/10.1007/978-3-319-64641-1_17
In this study, the aspect ratios of carboxymethylated and TEMPO-oxidised cellulose nanofibrils (CNF) were estimated by gel point analysis using a sedimentation approach. The f...

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