Dataset for 'Cationic surfactants as a non-covalent linker for oxidised cellulose nanofibrils and starch-based hydrogels'

In this study, cationic surfactant (DTAB and CTAB) induced gelation of OCNF and soluble starch in water systems was investigated to determine their rheological behaviour. The increase of storage modulus of OCNF/surfactant hydrogels with increasing surfactant concentration demonstrates the progressive increase of the “stiffness” of the gels suggesting an electrostatic attraction between OCNF and DTAB/CTAB due to their oppositely charged moieties.

Rheological properties of hydrogels composed of TEMPO-oxidised cellulose nanofibrils (OCNF)-starch in the presence of cationic surfactants were investigated in this study. The dataset includes rheology (oscillatory frequency and amplitude sweeps, viscosity), zeta-potential, starch-iodine test data of OCNF/starch hydrogels in presence of cationic surfactants, like dodecyltrimethylammonium bromide (DTAB) and cetyltrimethylammonium bromide (CTAB) surfactants.

Subjects:
Biomolecules and biochemistry
Chemical synthesis
Materials processing

Cite this dataset as:
Hossain, Z., Calabrese, V., da Silva, M., Bryant, S., Schmitt, J., Scott, J., Edler, K., 2019. Dataset for 'Cationic surfactants as a non-covalent linker for oxidised cellulose nanofibrils and starch-based hydrogels'. Bath: University of Bath Research Data Archive. Available from: https://doi.org/10.15125/BATH-00683.

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Data

Zeta potential_Fig … 6&7.xlsx
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Raw data for ζ-potential (Figure 2, and ESI 6 and 7)

Rheology_Figure 3.xlsx
application/vnd.openxmlformats-officedocument.spreadsheetml.sheet (20kB)
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Raw rheology data (Figure 3)

Rheology_Figure 4.xlsx
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Raw rheology data (Figure 4)

Rheology_Figure 5.xlsx
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Raw rheology data (Figure 5)

Iodine Test_Figure 7&8.xlsx
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Raw data from iodine test (Figures 7 and 8)

All Figures.odt
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Figures from the associated manuscript

ESI_CARBPOL-D-19-03008_R5.docx
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Supplementary information

Creators

Zakir Hossain
University of Bath

Vincenzo Calabrese
University of Bath

Saffron Bryant
University of Bath

Julien Schmitt
University of Bath

Janet Scott
University of Bath

Karen Edler
University of Bath

Coverage

Collection date(s):

From 12 June 2018 to 15 May 2019

Documentation

Data collection method:

Gels were prepared by mixing various ratios of OCNF and starch (Soluble S9765, Sigma Aldrich, UK) solution (1:0.5 and 1:1 wt%) followed by vortex mixing until hydrogels were obtained. The required amount of cationic surfactants (Dodecyltrimethylammonium bromide (DTAB, purity≥98%, MW 308.34 g mol-1, Sigma-Aldrich, UK), cetyltrimethylammonium bromide (CTAB, purity 99%, MW 364.45 g mol-1, ACROS Organic, Fisher-Scientific, UK) were added to the starch solution prior to mixing with OCNF during the gel formation. Rheological tests were performed using a stress-controlled rheometer (Discovery HR-3, TA Instruments, USA) equipped with a sandblasted plate-plate stainless steel geometry (40 mm) at 25oC. Approximately 1 mL of the gel was placed between the plates (with a plate-plate gap of 0.5 mm) and frequency, amplitude and flow sweeps were measured to determine the viscoelastic properties of the gels. Frequency sweeps were conducted, within the linear viscoelastic range, in strain control mode at 0.5% strain with an angular frequency range from 0.1 to 100 rad s-1. Amplitude sweeps were measured at an angular frequency of 1 Hz (6.28 rad s 1) covering the strain ranging from 0.01 to 50%. Finally, flow curves were measured to study the viscosity response of the sample to shearing, with a shear rate ranging from 0.01 to 100 s-1. ζ-potential measurements were conducted using a Zeta-sizer (Malvern Zeta-sizer Nano ZSP®, UK). Dilute solution (0.1 wt%) of samples in DI water were placed in the capillary electrode cell and the ζ-potentials measured as an average of 5 measurements from 100 scans each. Iodine stock solution (50% of Lugol’s solution) was prepared by dissolving 0.25 g of iodine (Fisher Scientific, UK) and 0.5 g of potassium iodide (Sigma-Aldrich, UK) in 150 mL of DI water under magnetic stirring. Then 30 µl of the prepared iodine solution was added to each 5mL of diluted (25 times) gel sample before measuring the absorbance using a UV/visible spectrometer (Varian Cary 50 Probe) by scanning over the wavelength range of 290 to 800 nm.

Technical details and requirements:

The following instruments were used: - Stress-controlled rheometer (Discovery HR-3, TA Instruments, USA); - Zeta-sizer (Malvern Zeta-sizer Nano ZSP®, UK); - UV/visible spectrometer (Varian Cary 50 Probe).

Funders

Engineering and Physical Sciences Research Council (EPSRC)
https://doi.org/10.13039/501100000266

New Enzymatically Produced Interpenetrating Starch-Cellulose Gels
EP/N033310/1

Publication details

Publication date: 31 December 2019
by: University of Bath

Version: 1

DOI: https://doi.org/10.15125/BATH-00683

URL for this record: https://researchdata.bath.ac.uk/id/eprint/683

Related articles

Hossain, K. M. Z., Calabrese, V., da Silva, M. A., Bryant, S. J., Schmitt, J., Scott, J. L. and Edler, K. J., 2020. Cationic surfactants as a non-covalent linker for oxidised cellulose nanofibrils and starch-based hydrogels. Carbohydrate Polymers, 233, p.115816. Available from: https://doi.org/10.1016/j.carbpol.2019.115816.

Contact information

Please contact the Research Data Service in the first instance for all matters concerning this item.

Contact person: Zakir Hossain

Departments:

Faculty of Science
Chemistry

Research Centres & Institutes
Centre for Advanced Separations Engineering (CASE)
Centre for Biosensors, Bioelectronics and Biodevices (C3Bio)
Centre for Nanoscience and Nanotechnology
Centre for Regenerative Medicine
Centre for Sustainable Chemical Technologies