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Open AccessArticle

Dyeing and Characterization of Cellulose Powder Developed from Waste Cotton

1
State Key Laboratory of New Textile Materials and Advanced Processing Technologies, Wuhan Textile University, Wuhan 430200, China
2
Institute for Frontier Materials, Deakin University, Waurn Ponds, VIC 3216, Australia
3
College of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan 430200, China
*
Author to whom correspondence should be addressed.
Polymers 2019, 11(12), 1982; https://doi.org/10.3390/polym11121982
Received: 3 November 2019 / Revised: 21 November 2019 / Accepted: 25 November 2019 / Published: 2 December 2019
(This article belongs to the Section Polymer Applications)
In this study, waste cotton fibers were environmentally reused. First, they were milled into fine powders with particle sizes of around 30 µm and dyed for use as pigments. Dyeing properties of the cellulose powder were explored by determining the dye uptake, K/S value, and bath ratio. Among the various samples, powders with owf (on weight of fabric) of 0% dye (pristine cellulose powder), and 10% and 50% dyed powders were selected; and these powders were characterized by several methods to compare the properties of dyed and undyed cellulose. The surface morphologies of the powders were observed with a scanning electron microscope (SEM). Combining the SEM images with the Brunauer–Emmet–Teller (BET) data, it was found that the smaller the particle size, the larger is the surface area. In addition, the X-ray photoelectron spectroscopy (XPS) results revealed that with increasing dye concentration, the intensity of the C peak reduced, while those of O and S increased. Moreover, the main components of the dyed and undyed cellulose powders were found to be almost the same from the Fourier-transform infrared spectroscopy (FTIR) results. Finally, the dynamic mechanical analysis (DMA) data revealed that the loss modulus was significantly larger than the storage modulus, demonstrating that the material mainly undergoes viscous deformation. View Full-Text
Keywords: recycling of waste cotton; cellulose powder; dyeing properties; specific surface area; thermal analysis; DMA recycling of waste cotton; cellulose powder; dyeing properties; specific surface area; thermal analysis; DMA
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MDPI and ACS Style

Gan, L.; Guo, H.; Xiao, Z.; Jia, Z.; Yang, H.; Sheng, D.; Pan, H.; Xu, W.; Wang, Y. Dyeing and Characterization of Cellulose Powder Developed from Waste Cotton. Polymers 2019, 11, 1982.

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