Abstract:The aim of this work was to encapsulate lavender oil by complex coacervation using gelatin and gum Arabic as encapsulants. The effects of various factors including pH value, the core/wall ratio, wall material concentration, stirring speed, cross‐linkers and homogenization rate on the appearance, mean particle size, yield, loading capacity (LC) and encapsulation efficiency (EE) were investigated. The optimal conditions (pH 3.5, core/wall 3:2, wall material concentration 1%, stirring speed 450 rpm, homogenizatio… Show more
“…Xiao et al [34] found that the weight of microcapsules using chitosan as Microcapsules using gelatin and gum arabic as wall materials showed the maximum peak at about 313°C. [40] Hong et al [41] prepared poly(l-lactide) microcapsules for which the weight decreased quickly at 310-410°C. The main weight loss of aromatic nanocapsules was observed at 130-460°C.…”
Methyl methacrylate (MMA)-styrene (St) copolymer nanocapsules containing cologne essential oil for fragrant fabrics treatment were prepared by miniemulsion polymerization. The morphology, chemical composition and thermal properties were characterized by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR) and thermal gravimetric analysis (TGA). The nanocapsules had relatively small size (ca. 136 nm of mean particle diameter), regular sphericity and uniform particle size distribution. The encapsulation efficiency and loading capacity of the nanocapsules were 85.4% and 42.7%, respectively. The nanocapsules had good thermostability. The release experiments showed that 6.8% cologne essential oil still existed after being washed 15 times in the fabrics treated with nanocapsules, indicating that the fabrics treated with nanocapsules had good washing durability.
“…Xiao et al [34] found that the weight of microcapsules using chitosan as Microcapsules using gelatin and gum arabic as wall materials showed the maximum peak at about 313°C. [40] Hong et al [41] prepared poly(l-lactide) microcapsules for which the weight decreased quickly at 310-410°C. The main weight loss of aromatic nanocapsules was observed at 130-460°C.…”
Methyl methacrylate (MMA)-styrene (St) copolymer nanocapsules containing cologne essential oil for fragrant fabrics treatment were prepared by miniemulsion polymerization. The morphology, chemical composition and thermal properties were characterized by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR) and thermal gravimetric analysis (TGA). The nanocapsules had relatively small size (ca. 136 nm of mean particle diameter), regular sphericity and uniform particle size distribution. The encapsulation efficiency and loading capacity of the nanocapsules were 85.4% and 42.7%, respectively. The nanocapsules had good thermostability. The release experiments showed that 6.8% cologne essential oil still existed after being washed 15 times in the fabrics treated with nanocapsules, indicating that the fabrics treated with nanocapsules had good washing durability.
“…These problems may be solved by encapsulation technology because a sensitive substance can be entrapped in a membrane or capsule. It can be separated from the deteriorating circumstance (Xiao et al, 2014;Zhu et al, 2016). Encapsulation can also isolate a substance from the surrounding matter reactions (Matsuno & Adachi, 1993).…”
Linalool has been extensively applied in various fields, such as flavoring agent, perfumes, cosmetics and medical science. However, linalool is unstable, volatile and readily oxidizable. A sensitive substance can be encapsulated in a capsule, so encapsulation technology can solve these problems. In this paper, linalool-loaded nanocapsules (Lin-nanocapsules) were prepared via the ionic gelation method and Lin-nanocapsules were characterized. The results of Fourier transformation infrared spectroscopy (FTIR) showed that linalool was successfully encapsulated in the wall materials. Scanning electron microscopy (SEM) results demonstrated that the shapes of Lin-nanocapsules, with smooth surfaces, were nearly spherical. Lin-nanocapsule average particle size was 352 nm and its polydispersity index (PDI) was proved to be 0.214 by the results of dynamic light scattering (DLC). Thermogravimetric results indicated that linalool loading capacity (LC) was 15.17%, and encapsulation could decrease linalool release and increase linalool retaining time under the high temperature. Oscillatory shear and steady-state shear measurements of Lin-nanocapsule emulsions were systematically investigated. The results of steady-state shear showed that Lin-nanocapsule emulsion, which was Newtonian only for high shear rate, was non-Newtonian. It was proved by oscillatory shear that when oscillation frequency changed from low to high, Lin-nanocapsules emulsion changed from viscous into elastic.Keywords: lin-nanocapsules; flavor; encapsulation; rheology.Practical Application: Lin-nanocapsules were prepared via the ionic gelation method.
“…Thus, encapsulation and particularly, nanoencapsulation, is one of the most efficient methods for the formulation of active substances, being a viable and efficient approach to increasing its physical stability and protecting them from interactions with environmental factors, such as, pH, oxygen, light and moisture. [18][19][20] For example, solid lipid microparticles (SLM) were used to encapsulate juniper oil, in order to reduce the volatility of the antimicrobial agent, applied to treatment of acne vulgare. 21 The encapsulation of eugenol and carvacrol into nanometric surfactant micelles for the solubilization in the aqueous phase also resulted in enhanced antimicrobial activity against two pathogenic bacteria.…”
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confidence: 99%
“…The authors reported one encapsulation efficiency of 66%, the appearance of microcapsules is sphere and the surface is smooth without aggregation. 19 The incorporation of the natural products, in the form of oil eliminates the need for precursor preparation. Balasubramanian et al, utilized the lavender oil fabricated in an electrospun PAN nanofiber for antibacterial and drug delivery applications.…”
Nanoparticles comprised of the poly(ethylene oxide)-b-poly (lactic acid) diblock copolymer (PEO-b-PLA) with and without the incorporation of lavender oil were prepared by nanoprecipitation. Diblock copolymers based on a fixed PEO block (5 KDa ) and two different PLA segments (4.5 or 10 KDa ) were used. The morphology, encapsulation efficiency, essential oil-polymer interaction and the release kinetics of the active agent in the nanoparticles, were evaluated. The hydrodynamic radius of the nanoparticles determined by light scattering was affected by the size of the poly(lactic acid) (PLA) block. The lavender essential oil encapsulation efficiency (at a concentration of 0.4 μL mL -1 ) determined by UV-VIS spectroscopy was in the range of 70-75%. The in vitro release suggests that the polymeric barrier is able to control the oil release.
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