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Professor James Njuguna


Swelling performance of sodium polyacrylate and poly(acrylamide-co-acrylic acid) potassium salt. (2019)
Journal Article
MAHON, R., BALOGUN, Y., OLUYEMI, G. and NJUGUNA, J. 2020. Swelling performance of sodium polyacrylate and poly (acrylamide-co-acrylic acid) potassium salt. SN applied sciences [online], 2(1), article ID 117. Available from: https://doi.org/10.1007/s42452-019-1874-5

The application of superabsorbent polymer hydrogels in the oil and gas industry for reservoir and well management is gaining more traction. In this study, the swelling performance and adsorption kinetics of two commercial superabsorbent polymer hydro... Read More about Swelling performance of sodium polyacrylate and poly(acrylamide-co-acrylic acid) potassium salt..

Prediction of casing critical buckling during shale gas hydraulic fracturing. (2019)
Journal Article
MOHAMMED, A.I., OYENEYIN, B., BARTLETT, M. and NJUGUNA, J. 2020. Prediction of casing critical buckling during shale gas hydraulic fracturing. Journal of petroleum science and engineering [online], 185, article ID 106655. Available from: https://doi.org/10.1016/j.petrol.2019.106655

Casing deformation during volume fracturing in shale gas horizontal wells is caused by both existing and induced stresses. These stresses jointly alter and compound the stress field around the casing leading to inefficient well stimulation as planned... Read More about Prediction of casing critical buckling during shale gas hydraulic fracturing..

Recent developments in graphene oxide/epoxy carbon fiber-reinforced composites. (2019)
Journal Article
KEYTE, J., PANCHOLI, K. and NJUGUNA, J. 2019. Recent developments in graphene oxide/epoxy carbon fiber-reinforced composites. Frontiers in materials [online], 6, article ID 224. Available from: https://doi.org/10.3389/fmats.2019.00224

The two-dimensional macro molecule graphene and its derivatives have widely been investigated for their application as nanofiller in carbon fibre-reinforced composites (CFRC). Research has progressed from techniques that simply mix graphene as a mixi... Read More about Recent developments in graphene oxide/epoxy carbon fiber-reinforced composites..

Exploration of elastomeric and polymeric liquid crystals with photothermal actuation: a review. (2019)
Journal Article
RASTOGI, P., NJUGUNA, J. and KANDASUBRAMANIAN, B. 2019. Exploration of elastomeric and polymeric liquid crystals with photothermal actuation: a review. European polymer journal [online], 121, article ID. 109287. Available from: https://doi.org/10.1016/j.eurpolymj.2019.109287

Recent research in soft materials is an exhilarating category which has been transcending boundaries for variety of functional applications. This category also stems liquid crystals whose stimuli-responsive feature has fantasized researchers for appl... Read More about Exploration of elastomeric and polymeric liquid crystals with photothermal actuation: a review..

Effect of oleic acid coating of iron oxide nanoparticles on properties of magnetic polyamide-6 nanocomposite. (2019)
Journal Article
GUPTA, R., PANCHOLI, K., DE SA, R., MURRAY, D., HUO, D., DROUBI, G., WHITE, M. and NJUGUNA, J. 2019. Effect of oleic acid coating of iron oxide nanoparticles on properties of magnetic polyamide-6 nanocomposite. JOM [online], 71(9), pages 3119-3128. Available from: https://doi.org/10.1007/s11837-019-03622-5

This work reports the development and testing of a magnetic polymer (Polyamide 6, PA6) nanocomposite capable of melting when exposed to an external magnetic field. Addition of high concentrations of iron oxide nanoparticles (NPs) can induce quick mel... Read More about Effect of oleic acid coating of iron oxide nanoparticles on properties of magnetic polyamide-6 nanocomposite..

Casing structural integrity and failure modes in a range of well types: a review. (2019)
Journal Article
MOHAMMED, A.I., OYENEYIN, B., ATCHISON, B. and NJUGUNA, J. 2019. Casing structural integrity and failure modes in a range of well types: a review. Journal of natural gas science and engineering [online], 68, article ID 102898. Available from: https://doi.org/10.1016/j.jngse.2019.05.011

This paper focus on factors attributing to casing failure, their failure mechanism and the resulting failure mode. The casing is a critical component in a well and the main mechanical structural barrier element that provide conduits and avenue for oi... Read More about Casing structural integrity and failure modes in a range of well types: a review..

Structural and thermal degradation behaviour of reclaimed clay nano-reinforced low density polyethylene nanocomposites. (2019)
Journal Article
SIDDIQUE, S., SMITH, G.D., YATES, K., MISHRA, A.K., MATTHEWS, K., CSETENYI, L.J. and NJUGUNA, J. 2019. Structural and thermal degradation behaviour of reclaimed clay nano-reinforced low-density polyethylene nanocomposites. Journal of polymer research [online], 26, article ID 154. Available from: https://doi.org/10.1007/s10965-019-1802-9

In this study, a novel reclaimed clay nanofiller used to manufacture low-density polyethylene (LDPE)/Oil based mud fillers (OBMFs) nanocomposites by a melt compounding process. The mechanical testing samples were manufactured using injection mouldin... Read More about Structural and thermal degradation behaviour of reclaimed clay nano-reinforced low density polyethylene nanocomposites..

Influence of reduced graphene oxide on epoxy/carbon fibre-reinforced hybrid composite: flexural and shear properties under varying temperature conditions. (2019)
Journal Article
JENKINS, P., SIDDIQUE, S., KHAN, S., USMAN, A., STAROST, K., MACPHERSON, A., BARI, P., MISHRA, S. and NJUGUNA, J. 2019. Influence of reduced graphene oxide on epoxy/carbon fibre-reinforced hybrid composite: flexural and shear properties under varying temperature conditions. Advanced engineering materials [online], 21(6), article ID 1800614. Available from: https://doi.org/10.1002/adem.201800614

This study investigated the effectiveness of reduced graphene oxide as nanofiller in enhancing epoxy/carbon fibre-reinforced composite at varying temperature conditions. The graphene oxide was synthesised using modified Hummer’s method and then chemi... Read More about Influence of reduced graphene oxide on epoxy/carbon fibre-reinforced hybrid composite: flexural and shear properties under varying temperature conditions..

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