Sunscreen Enhancement of Octyl Methoxycinnamate Microcapsules by Using Two Biopolymers as Wall Materials
Octyl methoxycinnamate (OMC) is widely used as a chemical sunscreen in sunscreen cosmetics. However, its direct contact with the skin would bring certain risks, such as skin photosensitive reaction. How to improve the effect of skin photodamage protection has become a current research hotspot. Encap...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-03-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/13/6/866 |
| _version_ | 1797541712824893440 |
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| author | Chuntao Xu Xuemin Zeng Zujin Yang Hongbing Ji |
| author_facet | Chuntao Xu Xuemin Zeng Zujin Yang Hongbing Ji |
| author_sort | Chuntao Xu |
| collection | DOAJ |
| description | Octyl methoxycinnamate (OMC) is widely used as a chemical sunscreen in sunscreen cosmetics. However, its direct contact with the skin would bring certain risks, such as skin photosensitive reaction. How to improve the effect of skin photodamage protection has become a current research hotspot. Encapsulating ultraviolet (UV) filters into microcapsules is an interesting method to increase the photostability of filters. In this study, sodium caseinate (SC) and arabic gum (GA) are chosen as wall materials to prepare synergistic sunscreen microcapsules by complex coacervation technology. A series of experiments are conducted to investigate the effects of pH, wall material concentration, and wall/core ratio on the formation of OMC microcapsules. The morphology, composition, and stability of OMC microcapsules are characterized by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), and thermogravimetric analysis (TGA). The OMC microcapsule is uniform in size distribution, smooth in surface morphology, and has good thermal stability. The results show that the ultraviolet absorption of the OMC microcapsules is better than that of the uncoated OMC for the ultraviolet-B (280–320 nm). Moreover, the OMC microcapsule released 40% in 12 h, while OMC released 65%, but the sun protection factor (SPF) of the OMC microcapsule sunscreen is 18.75% higher than that of OMC. This phenomenon may be attributed to the hydrophobic interaction between SC and OMC and the electrostatic interaction between SC and GA. |
| first_indexed | 2024-03-10T13:20:38Z |
| format | Article |
| id | doaj.art-c5603e7a1203448997d12e501a4d65d5 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-10T13:20:38Z |
| publishDate | 2021-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-c5603e7a1203448997d12e501a4d65d52023-11-21T10:06:17ZengMDPI AGPolymers2073-43602021-03-0113686610.3390/polym13060866Sunscreen Enhancement of Octyl Methoxycinnamate Microcapsules by Using Two Biopolymers as Wall MaterialsChuntao Xu0Xuemin Zeng1Zujin Yang2Hongbing Ji3School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, ChinaFine Chemical Industry Research Institute, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, ChinaSchool of Chemical Engineering and Technology, Sun Yat-Sen University, Zhuhai 519082, ChinaSchool of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, ChinaOctyl methoxycinnamate (OMC) is widely used as a chemical sunscreen in sunscreen cosmetics. However, its direct contact with the skin would bring certain risks, such as skin photosensitive reaction. How to improve the effect of skin photodamage protection has become a current research hotspot. Encapsulating ultraviolet (UV) filters into microcapsules is an interesting method to increase the photostability of filters. In this study, sodium caseinate (SC) and arabic gum (GA) are chosen as wall materials to prepare synergistic sunscreen microcapsules by complex coacervation technology. A series of experiments are conducted to investigate the effects of pH, wall material concentration, and wall/core ratio on the formation of OMC microcapsules. The morphology, composition, and stability of OMC microcapsules are characterized by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), and thermogravimetric analysis (TGA). The OMC microcapsule is uniform in size distribution, smooth in surface morphology, and has good thermal stability. The results show that the ultraviolet absorption of the OMC microcapsules is better than that of the uncoated OMC for the ultraviolet-B (280–320 nm). Moreover, the OMC microcapsule released 40% in 12 h, while OMC released 65%, but the sun protection factor (SPF) of the OMC microcapsule sunscreen is 18.75% higher than that of OMC. This phenomenon may be attributed to the hydrophobic interaction between SC and OMC and the electrostatic interaction between SC and GA.https://www.mdpi.com/2073-4360/13/6/866octyl methoxycinnamatesunscreenmicrocapsulecomplex coacervationsynergistic effects |
| spellingShingle | Chuntao Xu Xuemin Zeng Zujin Yang Hongbing Ji Sunscreen Enhancement of Octyl Methoxycinnamate Microcapsules by Using Two Biopolymers as Wall Materials Polymers octyl methoxycinnamate sunscreen microcapsule complex coacervation synergistic effects |
| title | Sunscreen Enhancement of Octyl Methoxycinnamate Microcapsules by Using Two Biopolymers as Wall Materials |
| title_full | Sunscreen Enhancement of Octyl Methoxycinnamate Microcapsules by Using Two Biopolymers as Wall Materials |
| title_fullStr | Sunscreen Enhancement of Octyl Methoxycinnamate Microcapsules by Using Two Biopolymers as Wall Materials |
| title_full_unstemmed | Sunscreen Enhancement of Octyl Methoxycinnamate Microcapsules by Using Two Biopolymers as Wall Materials |
| title_short | Sunscreen Enhancement of Octyl Methoxycinnamate Microcapsules by Using Two Biopolymers as Wall Materials |
| title_sort | sunscreen enhancement of octyl methoxycinnamate microcapsules by using two biopolymers as wall materials |
| topic | octyl methoxycinnamate sunscreen microcapsule complex coacervation synergistic effects |
| url | https://www.mdpi.com/2073-4360/13/6/866 |
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