Swelling-assisted reduction of chitosan molecular weight in the solid state using hydrogen peroxide
| Autor: | Nguyen Van Hoa, Pham Thi Dan Phuong, Nguyen Cong Minh, Trang Si Trung, Hoang Ngoc Cuong, Simona Schwarz, Willem F. Stevens |
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| Rok vydání: | 2016 |
| Předmět: |
Polymers and Plastics
Intrinsic viscosity technology industry and agriculture Infrared spectroscopy macromolecular substances 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Peroxide 0104 chemical sciences Chitosan Crystallinity chemistry.chemical_compound chemistry Chemical engineering Materials Chemistry medicine Swelling medicine.symptom Fourier transform infrared spectroscopy 0210 nano-technology Hydrogen peroxide |
| Zdroj: | Polymer Bulletin. 74:3077-3087 |
| ISSN: | 1436-2449 0170-0839 |
| DOI: | 10.1007/s00289-016-1880-3 |
| Popis: | Chitosan in the solid state has been degraded in a controlled way by treatment with hydrogen peroxide at room temperature. Chitosan was swollen in diluted NaOH, making it more susceptible to the peroxide treatment. The product has been characterized by intrinsic viscosity, FTIR infrared spectroscopy and roentgen diffraction. The molecular weight and the intrinsic viscosity were reduced significantly (about tenfold). The degree of deacetylation did not change. The chitosan product has a low viscosity (about 100 cP), a lower molecular weight (1.4 × 102 kDa), a high purity and a high crystallinity. It can be used in many potential applications. This method is easy and suitable for a large-scale process. |
| Databáze: | OpenAIRE |
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