Text within square brackets is instructional and should be deleted from the final version of the readme.] 1. ABOUT THE DATASET -------------------- Title: Data for An Investigation into the Dissolution of a Hemp–Wool Hybrid Yarn by the Ionic Liquid 1-Ethyl-3-Methylimidazolium Acetate Creator(s): [Samiah Dhafer Alqarni [1,2], Peter John Hine [1], Michael Edward Ries [1]] Organisation(s): [1. University of Leeds. 2. University of Bisha] Rights-holder(s):Unless otherwise stated, Copyright 2025 University of Leeds Publication Year: 2025 Description: [Data for the study of the dissolution of hemp-wool blend yarns in the ionic liquid (IL) 1-ethyl-3-methyl-imidazolium acetate [Emim][OAc] The hybrid yarns were dissolved in excess IL at various temperatures and times, followed by coagulation in water. Optical microscopy (OM), gravimetric analysis and wide-angle X-ray diffraction (XRD) were used to monitor structural changes of the two components separately during the dissolution and subsequent coagulation. All results showed that the hemp cellulose fraction dissolved faster than the wool keratin part, this being due to the additional strong disulfide bonds in the keratin (wool) fibres and the complex hierarchical structure of keratin. The increase in the cellulose dissolved fraction, which remained after coagulation in water, was measured by XRD and was found to follow time-temperature superposition (TTS) with an Arrhenius behaviour, giving an activation energy for cellulose dissolution of Ea= 55 ± 5 kJ/mol. Analysis of the optical images and the gravimetric analysis showed that both the cross-sectional area (A) and the mass per unit length decreased with time and temperature. They both followed (TTS) and gave activation energies of Ea= 112 ± 11 kJ/mol and 109 ± 6 kJ/mol, respectively, leading to an average value of 111 ± 9 kJ/mol. We propose that this is the activation energy for the dissolution of the keratin fraction of the hybrid yarn in [Emim][OAc], as we attribute the mass loss (and decrease in the cross-sectional area) of the hybrid yarns to the loss of the keratin fraction, which is removed during the coagulation phase. To the best of our knowledge, this is the first study to apply TTS to a cellulose–keratin hybrid system and deconvolute the dissolution behaviour of each component through the characterisation and analysis, providing new insight into the dissolution dynamics of blended biopolymers in ionic liquids.] Cite as: [Indicate how the dataset should be cited. The Archive's default citation format is: [Creators] ([Publication year]): [Title]. University of Leeds. [Dataset] [DOI], e.g. Radajewski, Dimitry and Meldrum, Fiona (2021) Dataset for 'An Innovative Data Processing Method for Studying Nanoparticle Formation in Droplet Microfluidics using X-rays Scattering'. University of Leeds. [Dataset] https://doi.org/10.5518/1013. Note that although the DOI will not be assigned until the dataset is published in the Archive, once you have started a deposit, a DOI will be reserved based on the item ID in the database. In the example cited, the item ID is 1013. The preceding string is always the same. If your item ID is 999, the DOI will be https://doi.org/10.5518/999.] Related publication: [Provide a citation for any article reporting results based on analysis of the dataset. Direct links to related publications can also be added to the Related resources fields in the metadata record. If a publication is in preparation at the time of deposit, provide relevant details where known (authors, title, journal, year, etc.) and indicate status at time of deposit (Submitted; In preparation; Accepted).] Contact: [m.e.ries@leeds.ac.uk] 2. TERMS OF USE --------------- Copyright 2026 The Authors. Unless otherwise stated, this dataset is licensed under a Creative Commons Attribution 4.0 International Licence: https://creativecommons.org/licenses/by/4.0/.