Related Experiment Video
Updated: Aug 28, 2025
10:07
Preparation of Multifunctional Silk-Based Microcapsules Loaded with DNA Plasmids Encoding RNA Aptamers and Riboswitches
Published on: October 8, 2021
1.5K
Stimulus responsive microcapsules and their aromatic applications
Zuobing Xiao1, Pingli Sun2, Huiqin Liu2
1School of Perfume and Aroma Technology, Shanghai Institute of Technology, No. 100 Haiquan Road, Shanghai 201418, China; School of Agriculture and Biology, Shanghai Jiaotong University, No. 800 Dongchuan Road, Shanghai 200240, China.
Summary
Stimuli-responsive microcapsules enhance fragrance longevity and control odor release in products. These advanced microcapsules offer intelligent aroma delivery, overcoming limitations of traditional fragrance applications.
Area of Science:
- Materials Science
- Chemical Engineering
- Fragrance Technology
Background:
- Fragrances and essential oils offer diverse applications but suffer from short retention and rapid degradation in consumer products.
- Direct addition leads to uncontrolled, short-lived odor release, limiting practical use of aromatic substances.
- Microencapsulation offers a solution to preserve aroma components and control their release.
Purpose of the Study:
- To review the application of stimuli-responsive microcapsules in the fragrance industry.
- To explore various encapsulation materials and release mechanisms for aromatic microcapsules.
- To discuss future research directions for stimuli-responsive microcapsules in diverse applications.
Main Methods:
- Review of scientific literature on stimuli-responsive microcapsules for fragrances.
- Categorization of encapsulation materials (natural polymers, synthetic polymers, inorganic materials).
- Analysis of common release mechanisms for stimuli-responsive aromatic microcapsules.
Main Results:
- Stimuli-responsive microcapsules effectively prevent aroma component degradation and evaporation.
- These microcapsules enable intelligent, on-off release of fragrances in response to environmental stimuli.
- Diverse materials and mechanisms are available for creating tailored stimuli-responsive aromatic microcapsules.
Conclusions:
- Stimuli-responsive microcapsules show significant promise for advanced fragrance applications.
- Further research can expand their use in textiles, food, paper, and leather products.
- Intelligent aroma delivery systems are key to overcoming traditional fragrance limitations.
Related Concept Videos
01:25Aromatic Compounds: Overview
11.3K
In general, the term ‘aromatic’ indicates a pleasant smell or fragrance from fresh flowers, freshly prepared coffee, etc. In the early history of organic chemistry, many benzene derivatives were isolated from the pleasant odor oils of the plants. For example, vanillin was isolated from the oil of vanilla, methyl salicylate from the oil of wintergreen, and cinnamaldehyde from the oil of cinnamon. They all had a pleasant odor; hence the name aromatic was given.
In 1825, Faraday...
In 1825, Faraday...
11.3K
01:14NMR Spectroscopy of Aromatic Compounds
4.9K
Aromatic compounds can be identified or analyzed using proton NMR and carbon‐13 NMR. Typically, aromatic hydrogens or hydrogens directly bonded to the aromatic rings are strongly deshielded by the aromatic ring current. Therefore, they absorb in the range of 6.5–8.0 ppm in proton NMR spectra. For instance, aromatic hydrogens directly bonded to the benzene ring absorb at 7.3 ppm. However, aromatic hydrogens of larger rings absorb farther upfield or downfield than the ideal range.
4.9K
01:18Aromatic Hydrocarbon Anions: Structural Overview
2.9K
Neutral hydrocarbons like cyclopentadiene with an odd number of carbon atoms and one intervening CH2 group in the ring are not aromatic. Cyclopentadiene with 4 π electrons does not satisfy the 4n + 2 π electron rule. Additionally, the intervening CH2 group is sp3 hybridized and lacks a vacant p orbital, thereby interrupting the overlap of p orbitals in a continuous manner and preventing the delocalization of π electrons throughout the ring.
Due to the absence of continuous...
Due to the absence of continuous...
2.9K
01:14π Electron Effects on Chemical Shift: Aromatic and Antiaromatic Compounds
1.3K
In aromatic compounds, such as benzene, the circulation of (4n + 2) π-electrons sets up a diamagnetic or diatropic ring current around the perimeter of the molecule. This current induces a magnetic field that opposes the external field inside the ring and reinforces it on the outside. The protons in benzene are deshielded and exhibit high chemical shifts in the range 6.5–8.5 ppm. The shielding effect at the center of the ring is evident in complex aromatic molecules, such as...
1.3K
01:18Aromatic Hydrocarbon Cations: Structural Overview
2.9K
Cycloheptatriene is a neutral monocyclic unsaturated hydrocarbon that consists of an odd number of carbon atoms and an intervening sp3 carbon in the ring. The three double bonds in the ring correspond to 6 π electrons, which is a Huckel number, and therefore satisfies the criteria of 4n + 2 π electrons. However, the intervening sp3 carbon disrupts the continuous overlap of p orbitals. As a result, cycloheptatriene is not aromatic.
Removing one hydrogen from the intervening CH2 group...
Removing one hydrogen from the intervening CH2 group...
2.9K
01:27Tactile and Chemical Senses
342
Tactile senses encompass touch, temperature, and pain, each mediated by specific receptors. Touch receptors detect mechanical energy or pressure against the skin. Sensory fibers from these receptors enter the spinal cord and relay information to the brain stem. Here, most fibers cross over to the opposite side of the brain. The touch information then moves to the thalamus, which projects a map of the body's surface onto the somatosensory areas of the parietal lobes in the cerebral cortex.
342