AI Article Synopsis
- The study synthesized cellulose carbamate using a solid-liquid phase method with cellulose pulp and urea, achieving a nitrogen content of 4.5%.
- The resulting cellulose membrane displayed high transparency and effective separation properties, maintaining cellulose's original structure and thermal stability.
- Tests showed the membrane effectively rejected dyes and had a 100% separation efficiency for oil/water mixtures, indicating potential applications in water treatment and biotechnology.
Article Abstract
In this study, cellulose pulp and urea were used to synthesize cellulose carbamate (nitrogen content reaches 4.5%) by low-cost and environmentally friendly solid-liquid phase method. Cellulose carbamate fluid was prepared by using sodium hydroxide aqueous solution as solvent. The fluid was regenerated and formed in a coagulation bath, and finally a regenerated cellulose membrane with high transparency and separation ability was obtained. The simple chemical treatment of cellulose not only greatly increased the mass fraction of cellulose dissolution (It has reached 15%) and retains the original crystal form and thermal stability of cellulose. The surface of the membrane was relatively dense, and the inside has regular microchannel. The factors affect the transparency and water flux of regenerated cellulose membranes were discussed by orthogonal experimental range analysis. The ability of the regenerated cellulose membrane to reject dyes was tested. The results showed that the rejection of methyl blue and congo red reached 100%, and the rejection rate of methyl orange reached 60%. The oil/water separation ability and the anti-pollution ability of the regenerated cellulose membrane were tested. The oil/water separation effect reached 100%. This membrane may have application prospect in water treatment, biotechnology.
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| http://dx.doi.org/10.1016/j.ijbiomac.2019.07.146 | DOI Listing |
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