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Preparation of Fragrance Microcapsule with Chitosan/ Gelatin/ Cellulose Nanocrystalline Composite Wall Material
Received:January 11, 2021  
DOI：10.11980/j.issn.0254-508X.2021.06.006
Key Words:complex coacervation  microcapsules  cellulose nanocrystals  gelatin  chitosan
Fund Project:天津市教委科研计划资助项目（2018KJ098）。
Author NameAffiliationPostcode
JIANG Tianyan Tianjin Key Lab of Pulp and Paper， Tianjin University of Science and Technology， Tianjin， 300457 300457
LIU Wanyi Tianjin Key Lab of Pulp and Paper， Tianjin University of Science and Technology， Tianjin， 300457 300457
WANG Cong Tianjin Key Lab of Pulp and Paper， Tianjin University of Science and Technology， Tianjin， 300457 300457
LI Yuhang Tianjin Key Lab of Pulp and Paper， Tianjin University of Science and Technology， Tianjin， 300457 300457
LUAN Yunhao Tianjin Key Lab of Pulp and Paper， Tianjin University of Science and Technology， Tianjin， 300457 300457
LIU Pengtao Tianjin Key Lab of Pulp and Paper， Tianjin University of Science and Technology， Tianjin， 300457 300457
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Abstract:In this study， the lemon-flavor fragrance microcapsules were prepared by complex coacervation method using lemon flavor as the core material， chitosan （CS）， gelatin （GE）， and cellulose nanocrystal （CNC） as the composite wall materials. The effects of wall material mass fraction， CNC mass fraction， core-to-wall ratio， and emulsification rate on both particle size and embedding rate of the fragrance microcapsules were studied. The optimal preparation condition was found that the wall material mass fraction was 0.2%， the mass fraction of CNC was 0.3%， the core-to-wall ratio was 3：1， and the emulsification rate was 900 r/min. The embedding rate of the prepared fragrance microcapsule was 74.35% under the optional condition. FT-IR showed that electrostatic attraction occurred between CS， GE and CNC. SEM showed that the prepared fragrance microcapsules were spherical. The laser particle size analyzer showed that the particle size of the prepared fragrance microcapsules ranged from 1.8 to 5.2 μm， with good dispersibility. Thermogravimetric analysis showed that the CS/GE/CNC wall material system could well protect the slow release of lemon flavor below 200℃.
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