Enhancing transparency and performance of regenerated cellulose membrane for organic dye treatment: the role of dimethyl sulfoxide in structural modification
Mai Ngoc Nguyen, Thu Minh Truong, Vi Quynh Nguyen, Phuong Mai Cao, Thuy Tran Thi, Bang Cong Nguyen
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引用次数: 0
Abstract
Dimethyl sulfoxide (DMSO) has gained attention in cellulose-related researchs as an accelerator of cellulose dissolution. However, the comprehension of its influence on the transparency of regenerated cellulose membranes, which is crucial for composite materials in textile water treatment, remains superficial. To investigate the effect of DMSO on cellulose membranes, we developed high transparency regenerated cellulose membranes via an environmentally friendly method at room temperature, enabling the effective immobilization of TiO2 within the membrane matrix. The preparation process involves introducing TiO2 particles into a solution of microcrystalline cellulose/tetrabutylphosphonium hydroxide with co-solvent DMSO and subsequent coagulation in propylene carbonate. The membranes’ physicochemical characterization was investigated by Fourier transform infrared spectroscopy, X-ray diffraction, and thermogravimetric analysis. The transparency and morphological characteristics of the membranes were analyzed through UV–Vis spectroscopy and scanning electron microscopy. The specific impacts of DMSO on the membrane properties, namely cellulose solution viscosity, porosity, and photocatalytic performance, were studied. Results showed that incorporating DMSO significantly enhances the optical clarity and light transmittance of the membranes from 1.35 to 100% as well as efficiency in treating organic dye in wastewater (≈ 90% methylene blue removal). These findings suggest that DMSO plays a crucial role in modifying the structural properties of the membranes, thereby improving transparency. This study provides valuable insights for developing cellulose-based materials with tailored optical properties for applications requiring high transparency and performance.
期刊介绍:
Cellulose is an international journal devoted to the dissemination of research and scientific and technological progress in the field of cellulose and related naturally occurring polymers. The journal is concerned with the pure and applied science of cellulose and related materials, and also with the development of relevant new technologies. This includes the chemistry, biochemistry, physics and materials science of cellulose and its sources, including wood and other biomass resources, and their derivatives. Coverage extends to the conversion of these polymers and resources into manufactured goods, such as pulp, paper, textiles, and manufactured as well natural fibers, and to the chemistry of materials used in their processing. Cellulose publishes review articles, research papers, and technical notes.