Citronellol (CI)-loaded, chitosan (CS)-enclosed dendritic mesoporous organosilica nanoparticles (CI@D-MONs@CS) are successfully fabricated. The synthesized CI@D-MONs@CS present spherical shape with the particle size of 424±24 nm in diameter and dendritic mesopores. CI loading ratio of CI@D-MONs@CS is about 12.42% from TGA analysis. CI release from CI@D-MONs@CS exhibits pH-redox dual responsiveness. More interesting, the axillary deodorant effect is investigated with Staphylococcus haemolyticus in an artificial sweat model. The results show that CI@D-MONs@CS present an excellent bacteria-killing effect and the smell of artificial sweat is greatly improved, avoiding the formation of undesirable odorant compounds from the bacteria. The obtained CI@D-MONs@CS is a potential carrier of natural fragrance or actives with dual responsive release. The application of CI@D-MONs@CS is a new and effective strategy to the axillary odor problem.
As concerns about personal health continue to escalate, there is an urgent need to innovate the development and production of photopolymeric 3D printing thermoset materials with inherent antibacterial properties and high elongation, paving the way for significant advances in 3D printing technology. In this work, two acrylate compounds (CMA and CAMA)with inherent antibacterial properties were synthesized using renewable monomers derived from citronellol and cinnamyl alcohol. The chemical structures of the two acrylate compounds were verified via Fourier transform infrared spectroscopy(FT-IR) and 1 H NMR. The addition of these compounds to the photopolymeric 3D printing resin system can facilitate the production of 3D printed thermoset materials with inherent antibacterial properties. The mechanical and antibacterial properties of photopolymeric 3D printing thermosets were assessed utilizing tensile tests and oscillation methods. The results show that the addition of CMA and CAMA can significantly improve the fracture elongation and antibacterial performance of photopolymeric 3D printing thermosets. The improved systems exhibited the highest antibacterial rate (94.2 % and 98.9 %, respectively), and fracture productivities (47 % and 50 %, respectively). These results highlight the significant impact of integrating CMA and CAMA to enhance the toughness and antibacterial effects of photopolymeric 3D printing systems.
危险品化学品经营许可证（带存储）