| Autor: |
Jayanudin, Retno S.D. Lestari, Indar Kustiningsih, Dandi Irawanto, Rozak Bahaudin, Reyonaldo L.A. Wardana, Fakhri Muhammad, Maulana Suyuti, Muhammad Luthfi |
| Jazyk: |
angličtina |
| Rok vydání: |
2021 |
| Předmět: |
|
| Zdroj: |
South African Journal of Chemical Engineering, Vol 38, Iss , Pp 70-77 (2021) |
| Druh dokumentu: |
article |
| ISSN: |
1026-9185 |
| DOI: |
10.1016/j.sajce.2021.08.005 |
| Popis: |
This study aimed to investigate the effects of volume ratio in the continuous phase and the dispersed phase (CP/DP) and stirring speed on yield, water absorption, particle size, morphology surface, and cumulative release of nitrogen from the chitosan microsphere. The chitosan microsphere preparation method was emulsion cross-linking with glutaraldehyde saturated toluene (GST) as the cross-linking agent. Urea was mixed with chitosan solution and put into the oil. It was then stirred to form an emulsion. Glutaraldehyde saturated toluene (GST) was added slowly, followed by 2 ml glutaraldehyde, stirred continuously for 2 h. The formed chitosan microsphere was eventually washed and dried to be analyzed. The yield obtained was about 87.01%-96.71%, the water absorption was 79.77%–89.25%, and the diameter size of chitosan microspheres was from 153.66 ± 26.35 μm to 179.39 ± 34.95 μm. The chitosan microspheres morphology were good sphericity even though there were irregular size. Cumulative release analysis was obtained from 32.38%–37.69% by release mechanism such as anomalous behavior (non-Fickian kinetics) |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
|
