摘要
1. A functional core-shell microcapsule system was constructed via ultraviolet (UV)-curable microfluidic technology. 2. The microcapsule preparation process was optimized with a specific focus on three key factors to achieve size-controllable solid microcapsules. 3. The TGA test of microcapsulated essential oils confirming high loading efficiency of 72.3% for microfluidic technology. 4. Py-GC-MS test confirmed lower toxicity of ETPTA, whicht can be used as an ideal shell material for the fabrication of core-shell structured microcapsules in tobacco industry. In this work, a functional core-shell microcapsule system was constructed via ultraviolet (UV)-curable microfluidic technology. To achieve size-controllable solid microcapsules, the microcapsule preparation process was optimized with a specific focus on three key factors that regulate microcapsule size (D capsule ): shell material flow rate (Q shell ), core material flow rate (Q core ), and driving fluid flow rate (Q drive ). Through the optimization process, the optimal preparation conditions were determined as follows: Q shell of 70 mL/h, Q core of 30 mL/h and Q drive of 1320 mL/h. Under these optimized parameters, core-shell structured microcapsules with uniform size (approximately 600 μm) and intact morphology were successfully fabricated. On this basis, the thermal stability of the shell material ETPTA and the microcapsulated essential oils were investigated by TGA test. ETPTA exhibited the residual rate of only 3%, indicating that most of ETPTA was converted into gaseous pyrolysis products. The TGA test of microcapsulated essential oils confirming high loading efficiency of 72.3% for microfluidic technology. Pyrolysis-gas chromatography-mass spectrometry (Py-GC-MS) test of the ETPTA showed lower toxicity of ETPTA, indicating it can be used as an ideal shell material for the fabrication of core-shell structured microcapsules in tobacco industry. Download: Download high-res image (171KB) Download: Download full-size image
危险品化学品经营许可证（带存储）