Size Distribution and Characteristics of Chitin Microgels Prepared via Emulsified Reverse-Micelles
Chitin was extracted from local snow crab shell waste and used as a raw material in the fabrication of porous spherical microgels. The chitin microgels were obtained using a batch process of emulsification and, afterward, gelation. The effects of chitin concentrations, oil and water phase ratios (O:...
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ftmdpi:oai:mdpi.com:/1996-1944/12/7/1160/ 2023-08-20T04:09:48+02:00 Size Distribution and Characteristics of Chitin Microgels Prepared via Emulsified Reverse-Micelles Siriporn Taokaew Mitsumasa Ofuchi Takaomi Kobayashi 2019-04-10 application/pdf https://doi.org/10.3390/ma12071160 EN eng Multidisciplinary Digital Publishing Institute https://dx.doi.org/10.3390/ma12071160 https://creativecommons.org/licenses/by/4.0/ Materials; Volume 12; Issue 7; Pages: 1160 crab shell chitin spherical microgels reverse micelle gelation Text 2019 ftmdpi https://doi.org/10.3390/ma12071160 2023-07-31T22:11:00Z Chitin was extracted from local snow crab shell waste and used as a raw material in the fabrication of porous spherical microgels. The chitin microgels were obtained using a batch process of emulsification and, afterward, gelation. The effects of chitin concentrations, oil and water phase ratios (O:W), surfactants, and gelation on the size distribution and morphology of the microgels were investigated. The extracted chitin possessed α-chitin with a degree of acetylation of ~60% and crystallinity of 70%, as confirmed by Fourier Transform Infrared Spectroscopy (FTIR) and X-Ray Powder Diffraction (XRD). In the reverse-micellar emulsification, different chitin concentrations in NaOH solution were used as aqueous phases, and n-hexane media containing Span 80-based surfactants were used as dispersion phases. Various HCl solutions were used as gelling agents. Microgels with sizes ranging from ~5–200 μm were obtained relying on these studied parameters. Under the condition of 3% w/w chitin solution using O:W of 15:1 at 5% w/w of Span 80 (hydrophilic-lipophilic balance; HLB of 4.3), the gelation in the emulsified reverse micelles was better controlled and capable of forming spherical microgel particles with a size of 7.1 ± 0.3 μm, when 800 μL of 1 M HCl was added. The prepared chitin microgel exhibited macro-pore morphology and swelling behavior sensitive to the acidic pH. Text Snow crab MDPI Open Access Publishing Materials 12 7 1160 |
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crab shell chitin spherical microgels reverse micelle gelation |
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crab shell chitin spherical microgels reverse micelle gelation Siriporn Taokaew Mitsumasa Ofuchi Takaomi Kobayashi Size Distribution and Characteristics of Chitin Microgels Prepared via Emulsified Reverse-Micelles |
topic_facet |
crab shell chitin spherical microgels reverse micelle gelation |
description |
Chitin was extracted from local snow crab shell waste and used as a raw material in the fabrication of porous spherical microgels. The chitin microgels were obtained using a batch process of emulsification and, afterward, gelation. The effects of chitin concentrations, oil and water phase ratios (O:W), surfactants, and gelation on the size distribution and morphology of the microgels were investigated. The extracted chitin possessed α-chitin with a degree of acetylation of ~60% and crystallinity of 70%, as confirmed by Fourier Transform Infrared Spectroscopy (FTIR) and X-Ray Powder Diffraction (XRD). In the reverse-micellar emulsification, different chitin concentrations in NaOH solution were used as aqueous phases, and n-hexane media containing Span 80-based surfactants were used as dispersion phases. Various HCl solutions were used as gelling agents. Microgels with sizes ranging from ~5–200 μm were obtained relying on these studied parameters. Under the condition of 3% w/w chitin solution using O:W of 15:1 at 5% w/w of Span 80 (hydrophilic-lipophilic balance; HLB of 4.3), the gelation in the emulsified reverse micelles was better controlled and capable of forming spherical microgel particles with a size of 7.1 ± 0.3 μm, when 800 μL of 1 M HCl was added. The prepared chitin microgel exhibited macro-pore morphology and swelling behavior sensitive to the acidic pH. |
format |
Text |
author |
Siriporn Taokaew Mitsumasa Ofuchi Takaomi Kobayashi |
author_facet |
Siriporn Taokaew Mitsumasa Ofuchi Takaomi Kobayashi |
author_sort |
Siriporn Taokaew |
title |
Size Distribution and Characteristics of Chitin Microgels Prepared via Emulsified Reverse-Micelles |
title_short |
Size Distribution and Characteristics of Chitin Microgels Prepared via Emulsified Reverse-Micelles |
title_full |
Size Distribution and Characteristics of Chitin Microgels Prepared via Emulsified Reverse-Micelles |
title_fullStr |
Size Distribution and Characteristics of Chitin Microgels Prepared via Emulsified Reverse-Micelles |
title_full_unstemmed |
Size Distribution and Characteristics of Chitin Microgels Prepared via Emulsified Reverse-Micelles |
title_sort |
size distribution and characteristics of chitin microgels prepared via emulsified reverse-micelles |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2019 |
url |
https://doi.org/10.3390/ma12071160 |
genre |
Snow crab |
genre_facet |
Snow crab |
op_source |
Materials; Volume 12; Issue 7; Pages: 1160 |
op_relation |
https://dx.doi.org/10.3390/ma12071160 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/ma12071160 |
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Materials |
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12 |
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1160 |
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