The degradation behaviors of optical cellulose triacetate films in alkali/acid solutions
Author:
Wang Jian’an1, Fan Xiushan23
Affiliation:
1. Ankang Vocational and Technical College , Ankang , 725000 , China 2. Institute of Sports Biology, Shaanxi Normal University , Xi’an , 710119 , China 3. School of Chemistry & Chemical Engineering, Shaanxi Normal University , Xi’an , 710119 , China
Abstract
Abstract
In this research, the degradation behaviors of ramie-based cellulose triacetate (CTA) films in alkali or acid solutions at room temperature were assessed. Moreover, the attenuated total reflection infrared (ATR-IR), physicochemical properties testing, scanning electron microscope (SEM), and thermogravimetric analysis/differential scanning calorimeter (TG/DSC) were employed to evaluate the detailed degradation process of the CTA films, which were treated by alkali or acidic aqueous solutions. The research results demonstrated that the dominant reaction of CTA films in NaOH solution with various concentrations is deacetylation. Intriguingly, the degradation behaviors of CTA films in HCl depend on the concentration of acid. The CTA films were almost immune to HCl with the concentration less than 1 mol L−1. However, films were degraded directly when the concentration of acid was higher than 1 mol L−1. This study provides a theoretical basis and further understanding for the treatment of dumped CTA films at room temperature.
Funder
Projection of Training of Young Scholars
Publisher
Walter de Gruyter GmbH
Subject
Materials Chemistry,Polymers and Plastics,General Chemical Engineering
Reference25 articles.
1. He, Y., Ma, E., Xu, Z. Recycling indium from waste liquid crystal display panel by vacuum carbon-reduction. J. Hazard. Mater. 2014, 268, 185–190; https://doi.org/10.1016/j.jhazmat.2014.01.011. 2. Yu, L., Moriguchi, Y., Nakatani, J., Zhang, Q., Li, F., He, W., Li, G. Environmental impact assessment on the recycling of waste LCD panels. ACS Sustain. Chem. Eng. 2019, 7, 6360–6368; https://doi.org/10.1021/acssuschemeng.9b00119. 3. Liu, Z., Xu, Z., Huang, H., Li, B. A study of waste liquid crystal display generation in mainland China. Waste Manage. Res. 2016, 34, 58–66; https://doi.org/10.1177/0734242x15611736. 4. Liang, X., Xie, R., Zhu, C., Chen, H., Shen, M., Li, Q., Du, B., Luo, D., Zeng, L. Comprehensive identification of liquid crystal monomers biphenyls, cyanobiphenyls, fluorinated biphenyls, and their analogues in waste LCD panels and the first estimate of their global release into the environment. Environ. Sci. Technol. 2021, 55, 12424–12436; https://doi.org/10.1021/acs.est.1c03901. 5. Kang, W., Kim, J. C., Noh, J. H., Kim, D. W. Waste liquid-crystal display glass-directed fabrication of silicon particles for lithium-ion battery anodes. ACS Sustain. Chem. Eng. 2019, 7, 15329–15338; https://doi.org/10.1021/acssuschemeng.9b02654.
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