Impact of NaOH Concentration on Deweaving of Cotton Fabric in Aqueous Solutions
- Authors
- Cao, Hang Zhang; Yao, Yiqian; Halada, Gary; Jung, Hye Jung; Kim, Taejin
- Issue Date
- Feb-2021
- Publisher
- MDPI
- Keywords
- cotton fabric; recycling; sodium hydroxide; deweaving; Fourier-transform infrared spectroscopy
- Citation
- SUSTAINABILITY, v.13, no.4, pp 1 - 10
- Pages
- 10
- Journal Title
- SUSTAINABILITY
- Volume
- 13
- Number
- 4
- Start Page
- 1
- End Page
- 10
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/62594
- DOI
- 10.3390/su13042015
- ISSN
- 2071-1050
2071-1050
- Abstract
- In the past decade, there has been increasing attention paid to the recycling of cotton fabric waste. In the present study, different concentrations of sodium hydroxide (NaOH) ranging from 1 M to 4 M were used to thermomechanically deweave cotton fabric. The fabrics treated with 1 M NaOH and 2 M NaOH were partially deweaved, whereas those treated with 3 M NaOH and 4 M NaOH were completely deweaved. Fourier-transform infrared (FTIR) spectroscopy was applied to analyze the chemistry and structure of the cotton fabric. The FTIR spectra indicated that the structure of cotton fabrics treated with 1-2 M NaOH were similar to that of pristine fabric, while the presence of NaOH was observed. In the case of samples treated with 3-4 M NaOH, both the peak positions and the band intensities were changed, in addition to the formation of cellulose II. FTIR spectra for the recycled NaOH-treated cotton fabrics were compared, and no major structural changes were identified. A post-treatment with deionized (DI) water removed excess Na+ ions, with the sample showing a similar molecular structure to that of the pristine material. These results suggest the feasibility of recycling aqueous NaOH for post-washing treatment as a new method for recycling cellulosic fabric waste.
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