Nozzleless fabrication of oil-core biopolymeric microcapsules by the interfacial gelation of pickering emulsion templates
Ionotropic gelation has been an attractive method for the fabrication of biopolymeric oil-core microcapsules due to its safe and mild processing conditions. However, the mandatory use of a nozzle system to form the microcapsules restricts the process scalability and the production of small microcaps...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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American Chemical Society
2015
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| Online Access: | http://psasir.upm.edu.my/id/eprint/45620/ http://psasir.upm.edu.my/id/eprint/45620/1/CORE.pdf |
| _version_ | 1848850523583676416 |
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| author | Tan, Chin Ping Leong, Jun Yee Tey, Beng Ti Chan, Eng Seng |
| author_facet | Tan, Chin Ping Leong, Jun Yee Tey, Beng Ti Chan, Eng Seng |
| author_sort | Tan, Chin Ping |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | Ionotropic gelation has been an attractive method for the fabrication of biopolymeric oil-core microcapsules due to its safe and mild processing conditions. However, the mandatory use of a nozzle system to form the microcapsules restricts the process scalability and the production of small microcapsules (<100 μm). We report, for the first time, a nozzleless and surfactant-free approach to fabricate oil-core biopolymeric microcapsules through ionotropic gelation at the interface of an O/W Pickering emulsion. This approach involves the self-assembly of calcium carbonate (CaCO3) nanoparticles at the interface of O/W emulsion droplets followed by the addition of a polyanionic biopolymer into the aqueous phase. Subsequently, CaCO3 nanoparticles are dissolved by pH reduction, thus liberating Ca(2+) ions to cross-link the surrounding polyanionic biopolymer to form a shell that encapsulates the oil droplet. We demonstrate the versatility of this method by fabricating microcapsules from different types of polyanionic biopolymers (i.e., alginate, pectin, and gellan gum) and water-immiscible liquid cores (i.e., palm olein, cyclohexane, dichloromethane, and toluene). In addition, small microcapsules with a mean size smaller than 100 μm can be produced by selecting the appropriate conventional emulsification methods available to prepare the Pickering emulsion. The simplicity and versatility of this method allows biopolymeric microcapsules to be fabricated with ease by ionotropic gelation for numerous applications. |
| first_indexed | 2025-11-15T10:07:39Z |
| format | Article |
| id | upm-45620 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T10:07:39Z |
| publishDate | 2015 |
| publisher | American Chemical Society |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-456202021-01-26T19:17:06Z http://psasir.upm.edu.my/id/eprint/45620/ Nozzleless fabrication of oil-core biopolymeric microcapsules by the interfacial gelation of pickering emulsion templates Tan, Chin Ping Leong, Jun Yee Tey, Beng Ti Chan, Eng Seng Ionotropic gelation has been an attractive method for the fabrication of biopolymeric oil-core microcapsules due to its safe and mild processing conditions. However, the mandatory use of a nozzle system to form the microcapsules restricts the process scalability and the production of small microcapsules (<100 μm). We report, for the first time, a nozzleless and surfactant-free approach to fabricate oil-core biopolymeric microcapsules through ionotropic gelation at the interface of an O/W Pickering emulsion. This approach involves the self-assembly of calcium carbonate (CaCO3) nanoparticles at the interface of O/W emulsion droplets followed by the addition of a polyanionic biopolymer into the aqueous phase. Subsequently, CaCO3 nanoparticles are dissolved by pH reduction, thus liberating Ca(2+) ions to cross-link the surrounding polyanionic biopolymer to form a shell that encapsulates the oil droplet. We demonstrate the versatility of this method by fabricating microcapsules from different types of polyanionic biopolymers (i.e., alginate, pectin, and gellan gum) and water-immiscible liquid cores (i.e., palm olein, cyclohexane, dichloromethane, and toluene). In addition, small microcapsules with a mean size smaller than 100 μm can be produced by selecting the appropriate conventional emulsification methods available to prepare the Pickering emulsion. The simplicity and versatility of this method allows biopolymeric microcapsules to be fabricated with ease by ionotropic gelation for numerous applications. American Chemical Society 2015 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/45620/1/CORE.pdf Tan, Chin Ping and Leong, Jun Yee and Tey, Beng Ti and Chan, Eng Seng (2015) Nozzleless fabrication of oil-core biopolymeric microcapsules by the interfacial gelation of pickering emulsion templates. ACS Applied Materials and Interfaces, 7 (30). pp. 16169-16176. ISSN 1944-8244; ESSN: 1944-8252 https://pubmed.ncbi.nlm.nih.gov/26148344/ 10.1021/acsami.5b04486 |
| spellingShingle | Tan, Chin Ping Leong, Jun Yee Tey, Beng Ti Chan, Eng Seng Nozzleless fabrication of oil-core biopolymeric microcapsules by the interfacial gelation of pickering emulsion templates |
| title | Nozzleless fabrication of oil-core biopolymeric microcapsules by the interfacial gelation of pickering emulsion templates |
| title_full | Nozzleless fabrication of oil-core biopolymeric microcapsules by the interfacial gelation of pickering emulsion templates |
| title_fullStr | Nozzleless fabrication of oil-core biopolymeric microcapsules by the interfacial gelation of pickering emulsion templates |
| title_full_unstemmed | Nozzleless fabrication of oil-core biopolymeric microcapsules by the interfacial gelation of pickering emulsion templates |
| title_short | Nozzleless fabrication of oil-core biopolymeric microcapsules by the interfacial gelation of pickering emulsion templates |
| title_sort | nozzleless fabrication of oil-core biopolymeric microcapsules by the interfacial gelation of pickering emulsion templates |
| url | http://psasir.upm.edu.my/id/eprint/45620/ http://psasir.upm.edu.my/id/eprint/45620/ http://psasir.upm.edu.my/id/eprint/45620/ http://psasir.upm.edu.my/id/eprint/45620/1/CORE.pdf |