Effect of N-Acetylation Degree on the Properties of Chitosan-Stabilized Pickering Emulsions
The aim of this study is to apply a modification strategy based on covalently grafting acetyl groups onto polysaccharide chains to improve the emulsifying properties of chitosan. A second aim is to explore the optimal degree of acetylation (DA). Infrared spectroscopy (IR) confirmed that acetic anhyd...
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China Food Publishing Company
2024-12-01
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| Series: | Shipin Kexue |
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| Online Access: | https://www.spkx.net.cn/fileup/1002-6630/PDF/2024-45-24-005.pdf |
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| author | WU Jun, SHI Zhaojuan, YUAN Chuanxun, WANG Xingting, JIN Risheng |
| author_facet | WU Jun, SHI Zhaojuan, YUAN Chuanxun, WANG Xingting, JIN Risheng |
| author_sort | WU Jun, SHI Zhaojuan, YUAN Chuanxun, WANG Xingting, JIN Risheng |
| collection | DOAJ |
| description | The aim of this study is to apply a modification strategy based on covalently grafting acetyl groups onto polysaccharide chains to improve the emulsifying properties of chitosan. A second aim is to explore the optimal degree of acetylation (DA). Infrared spectroscopy (IR) confirmed that acetic anhydride reacetylation could regulate the DA of chitosan, and substitution only occurred on the amino group at the C2 position. The contact angle results showed that acetylation could effectively improve the non-polar part of chitosan, resulting in enhanced emulsifying properties. The droplet size of the Pickering emulsion stabilized by the modified chitosan significantly decreased compared with that observed with untreated chitosan. The emulsifying activity index (EAI) and emulsion stability index (ESI) of acetylated chitosan with 32% DH were the highest (39.56 m2/g and 65.54 min, respectively), and the average droplet size of the emulsion was the smallest (12.71 µm). In addition, the creaming index (CI) decreased significantly to 11.3% compared with that using untreated chitosan. It is proved that changing the molar proportion of N-acetyl-D-glucosamino units in chitosan can effectively improve the emulsifying properties of chitosan and the storage stability of emulsions. |
| format | Article |
| id | doaj-art-f61aa409ad7945089ce9efa7936d144f |
| institution | Kabale University |
| issn | 1002-6630 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | China Food Publishing Company |
| record_format | Article |
| series | Shipin Kexue |
| spelling | doaj-art-f61aa409ad7945089ce9efa7936d144f2025-02-05T09:08:01ZengChina Food Publishing CompanyShipin Kexue1002-66302024-12-014524364410.7506/spkx1002-6630-20240519-129Effect of N-Acetylation Degree on the Properties of Chitosan-Stabilized Pickering EmulsionsWU Jun, SHI Zhaojuan, YUAN Chuanxun, WANG Xingting, JIN Risheng0(1. School of Food and Biological Engineering, Hefei University of Technology, Hefei 230009, China; 2. Engineering Center of Agricultural Products Biochemistry, Ministry of Education, Hefei University of Technology, Hefei 230009, China)The aim of this study is to apply a modification strategy based on covalently grafting acetyl groups onto polysaccharide chains to improve the emulsifying properties of chitosan. A second aim is to explore the optimal degree of acetylation (DA). Infrared spectroscopy (IR) confirmed that acetic anhydride reacetylation could regulate the DA of chitosan, and substitution only occurred on the amino group at the C2 position. The contact angle results showed that acetylation could effectively improve the non-polar part of chitosan, resulting in enhanced emulsifying properties. The droplet size of the Pickering emulsion stabilized by the modified chitosan significantly decreased compared with that observed with untreated chitosan. The emulsifying activity index (EAI) and emulsion stability index (ESI) of acetylated chitosan with 32% DH were the highest (39.56 m2/g and 65.54 min, respectively), and the average droplet size of the emulsion was the smallest (12.71 µm). In addition, the creaming index (CI) decreased significantly to 11.3% compared with that using untreated chitosan. It is proved that changing the molar proportion of N-acetyl-D-glucosamino units in chitosan can effectively improve the emulsifying properties of chitosan and the storage stability of emulsions.https://www.spkx.net.cn/fileup/1002-6630/PDF/2024-45-24-005.pdfchitosan; pickering emulsions; acetylation; emulsifying capacity; stability |
| spellingShingle | WU Jun, SHI Zhaojuan, YUAN Chuanxun, WANG Xingting, JIN Risheng Effect of N-Acetylation Degree on the Properties of Chitosan-Stabilized Pickering Emulsions Shipin Kexue chitosan; pickering emulsions; acetylation; emulsifying capacity; stability |
| title | Effect of N-Acetylation Degree on the Properties of Chitosan-Stabilized Pickering Emulsions |
| title_full | Effect of N-Acetylation Degree on the Properties of Chitosan-Stabilized Pickering Emulsions |
| title_fullStr | Effect of N-Acetylation Degree on the Properties of Chitosan-Stabilized Pickering Emulsions |
| title_full_unstemmed | Effect of N-Acetylation Degree on the Properties of Chitosan-Stabilized Pickering Emulsions |
| title_short | Effect of N-Acetylation Degree on the Properties of Chitosan-Stabilized Pickering Emulsions |
| title_sort | effect of n acetylation degree on the properties of chitosan stabilized pickering emulsions |
| topic | chitosan; pickering emulsions; acetylation; emulsifying capacity; stability |
| url | https://www.spkx.net.cn/fileup/1002-6630/PDF/2024-45-24-005.pdf |
| work_keys_str_mv | AT wujunshizhaojuanyuanchuanxunwangxingtingjinrisheng effectofnacetylationdegreeonthepropertiesofchitosanstabilizedpickeringemulsions |