Browsing by Author "Impey, Sue"

Now showing 1 - 7 of 7
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    Data for: Nanoindentation Response of 3D Printed PEGDA Hydrogels in a Hydrated Environment
    (Cranfield University, 2023-01-27 09:40) Hakim Khalili, Mohammad; J. Williams, Craig; Zhang, Rujing; Wilson, Sandra; Impey, Sue; Aria, Indrat; Goel, Saurav; Dossi, Licia; Afsar, Ashfaq; Duarte martinez, Fabian; Micallef, Christian
    Raw and processed data sets from nanoidentation response of 3D printed hydrogels. 1. Raw data of nanoindentation response. 2. Representative load-displacement curves for each type of hydrogel. 3. Representative data for creep for different types of hydrogels. 4. Representative data for NMR spectras of different types of hydrogels. 5. Representative data for glass transition of different types of hydrogels.
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    Data in support of: PTFE layer formation during brush electroplating of nickel
    (Cranfield University, 2024-10-28) Isern Arrom, Luis; Impey, Sue; Endrino Armenteros, Jose Luis; Almond, Heather
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    Data set for Characterising flow with continuous aeration in an oscillatory baffle flow reactor using residence time distribution
    (Cranfield University, 2023-09-05 10:29) Cox, Rylan; Salonitis, Konstantinos; Impey, Sue
    Raw data for the following paper: Characterising flow with continuous aeration in an oscillatory baffle flow reactor using residence time distribution. Data was processed iteratively to reach the final TiS values portrayed within the publication and were compared with the TiS model for validation.
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    Data supporting 'Thermal response of multi-layer UV crosslinked PEGDA hydrogels'
    (Cranfield University, 2023-02-16 11:15) Hakim Khalili, Mohammad; Afsar, Ashfaq; Zhang, Rujing; Wilson, Sandra; Goel, Saurav; Impey, Sue; Aria, Adrianus
    All data sets are raw data from thermoresponse behaviour of hydrogels. 1. Swelling test for multi-150 um hydrogels with 1.8 mg/ml of photoabsorber.2. Swelling test for mono-5 mm hydrogels with 0 mg/ml of photoabsorber.3. Swelling test for multi-20 um hydrogels with 9 mg/ml of photoabsorber.4. Swelling test for mono-3 mm and mono-1.5 mm hydrogels with 0 mg/ml of photoabsorber.5. Cyclic test for multi-150 um hydrogels.6. Dried weight and solid residue weight of all hydrogels samples7. EWC, NWF, NVF-summary for all hydrogel samples8. DSC-TG-Thermogram-All sample types
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    Data supporting: 'Mechanical Behavior of 3D Printed Poly(ethylene glycol) Diacrylate Hydrogels in Hydrated Conditions Investigated Using Atomic Force Microscopy'
    (Cranfield University, 2023-03-21 08:49) Hakim Khalili, Mohammad; Panchal, Vishal; Dulebo, Alexander; Hawi, Sara; Zhang, Rujing; Wilson, Sandra; Dossi, Licia; Goel, S.; Impey, Sue; Aria, Indrat
    1. File AFM-Lines: Raw files for all force-distance curves along with excel file summarizing all the indentions on a single line taken at different height on the surface of the hydrogel. 2. File AFM-Maps: Raw files for all force-distance curves along with excel file summarizing all the indentation maps taken at the middle section on the surface of the hydrogel.
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    PTFE layer formation during brush electroplating of nickel
    (Springer, 2024-10-14) Isern, Luis; Impey, Sue; Almond, Heather; Clouser, SJ; Endrino, JL
    Brush electrodeposition of Ni/PTFE composite coatings was explored using a nickel high speed solution and polytetrafluoroethylene (PTFE) particles 6–9 μm in diameter. A novel bilayer-like, partially intercalated structure was produced, consisting of a rough nickel sublayer covered by an outer, compact, smooth PTFE layer. The study of the coating growth revealed that the PTFE particles bind together on the nickel coating valleys and grow until all the surface is covered by a polymer layer without the need of a baking stage. The resulting coating presents a hydrophobic surface with a low coefficient of friction (0.10) and higher corrosion resistance to salt spray testing than the nodular nickel coating. The coatings were produced using an aqueous nickel plating solution, where the hydrophobic PTFE particles were suspended using different substances: cetrimonium bromide (CTAB) cationic surfactant, isopropyl alcohol premixed with the particles, and ethanol premixed with the particles. High concentrations of the suspending products were detrimental for the deposition process, but optimal values of 0.1 g/l, 3 ml/l and 3 ml/l respectively were found. All compounds successfully suspended the PTFE particles and both alcohols produced the Ni/PTFE coating described before, but the CTAB failed to co-deposit the polymer.
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    Wear-resistant nickel-matrix composite coatings incorporating hard chromium carbide particles
    (Frontiers, 2024-01-08) Isern, Luis; Impey, Sue; Milosevic, Danijela; Clouser, Sidney J.; Endrino, José L.
    This work evaluates the influence of plating variables on the morphology, composition homogeneity, and abrasive wear resistance of metal matrix composite coatings. A set of Ni/Cr3C2 coatings were brush plated onto steel coupons modifying two key variables: particle size and brush material. Compositional maps of unprecedented detail have been produced and analysed statistically to enhance understanding of composition distribution. The use of Abbott-Firestone curves to analyse surface morphology enabled the evaluation of valley and peak features. The coating differences highlighted by previous analyses have been compared with their behaviour in abrasive environments, simulated using Taber testing. Moreover, coupling Taber testing with partial compositional maps at different wear stages enabled monitoring of coating wear evolution. This methodology has revealed the importance of particle sedimentation during plating, which increased particle incorporation in the composite coating but also increased composition heterogeneity. The smaller 1.7 μm carbides and abrasive brushes produced coatings with more homogeneous morphologies, higher particle content, and increased resistance against abrasive wear, with a 60% reduction in material loss in comparison to the standard nickel coatings.