Homogeneous isolation of nanocelluloses by controlling the shearing force and pressure in microenvironment
| Autor: | Lingxue Kong, Xiaoyi Wei, Jihua Li, Qinghuang Wang, Fei Wang, Donghui Han, Yihong Wang |
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| Rok vydání: | 2014 |
| Předmět: |
Polymers and Plastics
Chemistry Organic Chemistry Shear force Analytical chemistry Saccharum Nanocellulose Gel permeation chromatography X-ray photoelectron spectroscopy Chemical engineering Spectroscopy Fourier Transform Infrared Pressure Materials Chemistry Thermal stability Particle size Particle Size Fourier transform infrared spectroscopy Cellulose Dispersion (chemistry) Mechanical Phenomena |
| Zdroj: | Carbohydrate Polymers. 113:388-393 |
| ISSN: | 0144-8617 |
| DOI: | 10.1016/j.carbpol.2014.06.085 |
| Popis: | Nanocelluloses were prepared from sugarcane bagasse celluloses by dynamic high pressure microfluidization (DHPM), aiming at achieving a homogeneous isolation through the controlling of shearing force and pressure within a microenvironment. In the DHPM process, the homogeneous cellulose solution passed through chambers at a higher pressure in fewer cycles, compared with the high pressure homogenization (HPH) process. X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) demonstrated that entangled network structures of celluloses were well dispersed in the microenvironment, which provided proper shearing forces and pressure to fracture the hydrogen bonds. Gel permeation chromatography (GPC), CP/MAS (13)C NMR and Fourier transform infrared spectroscopy (FT-IR) measurements suggested that intra-molecular hydrogen bonds were maintained. These nanocelluloses of smaller particle size, good dispersion and lower thermal stability will have great potential to be applied in electronics devices, electrochemistry, medicine, and package and printing industry. |
| Databáze: | OpenAIRE |
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