School of Perfume and Aroma Technology, Shanghai Institute of Technology, Shanghai 201418, PR China.
School of Perfume and Aroma Technology, Shanghai Institute of Technology, Shanghai 201418, PR China; Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles, Donghua University, Shanghai 201620, PR China.
Int J Biol Macromol. 2021 Jul 31;183:743-752. doi: 10.1016/j.ijbiomac.2021.04.097. Epub 2021 Apr 24.
Essential oil products are often volatile, and their aromas cannot be effectively preserved over long periods of time. In this study, nanocellulose crystals were modified, and an amphiphilic copolymer was prepared by ring-opening polymerisation to produce wall materials. A nanocellulose crystal-grafted polylactic acid copolymer was successfully synthesised and characterised using nuclear magnetic resonance spectrometry, Fourier transform infrared spectrometry, X-ray diffraction, and thermogravimetric analysis. Because of the amphiphilic properties of the synthesised copolymer, an agarwood essential oil nanoemulsion system was prepared. Using transmission electron microscopy and dynamic laser light scattering, the nanoemulsion was observed to have an apparent shell-core structure. The nanoemulsion was uniformly distributed, and the system had good stability. Finally, the electronic nose results showed that the nanocellulose crystal-grafted polylactic acid copolymer micelle effectively protected agarwood essential oil aromas.
精油产品通常具有挥发性，其香气无法长时间有效保存。在本研究中，对纳米纤维素晶体进行了修饰，并通过开环聚合制备了双亲性共聚物作为壁材。采用核磁共振波谱、傅里叶变换红外光谱、X 射线衍射和热重分析成功合成并表征了纳米纤维素晶体接枝聚乳酸共聚物。由于合成共聚物的两亲性质，制备了沉香精油纳米乳液体系。通过透射电子显微镜和动态激光光散射观察到纳米乳液具有明显的核壳结构。纳米乳液分布均匀，体系稳定性良好。最后，电子鼻结果表明，纳米纤维素晶体接枝聚乳酸共聚物胶束有效地保护了沉香精油的香气。
