Preparation and Characterization of Microcapsules Containing Lemon Oil

Park, Soo‐Jin; Shin, Yu-Shik; Lee, Jae‐Rock

doi:10.1006/jcis.2001.7727

Cited by 138 publications

(61 citation statements)

References 18 publications

(18 reference statements)

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“…Therefore, particle size distribution is directly bound up with emulsion viscosity. This result finds support in particle size distribution ( Figure 3) and elsewhere in the literature (Park et al 2001).…”

Section: Resultssupporting

confidence: 90%

The effects of rheological properties of wall materials on morphology and particle size distribution of microcapsule

Xie¹,

WANg²,

Lu³

et al. 2010

Czech J. Food Sci.

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Xie Y., Wang A., Lu Q., Hui M. (2010): The effects of rheological properties of wall materials on morphology and particle size distribution of microcapsule. Czech J. Food Sci., 28: 433-439.The effects of rheological properties of the wall materials on the morphology and particle size distribution of microcapsules prepared by spray-drying were evaluated. Gelatin-sucrose (Gel-Suc), gelatin-peach-gum-sucrose (Gel-PG-Suc), and HI-CAP 100 were used as wall materials with vitamin A as a model core material. Scanning electron microscopy (SEM) showed that microcapsules produced with Gel-Suc exhibited cracks while Gel-PG-Suc produced a smooth surface with few pores, and HI-CAP100 a rounded surface containing characteristic concavities. The volume average diameter (D 4,3 ) showed significant variations from 73.9 ± 1.02 µm and 68.7 ± 0.85 µm to 29.9 ± 0.94 µm (P < 0.05). Rheometry indicated that the wall paste viscosity was inversely proportional to the shear rate. Viscosity ranking was Gel-Suc > Gel-PG-Suc > HI-CAP 100. Gel-Suc showed the highest elastic modulus (G') and viscous modulus (G'' values), followed by Gel-PG-Suc and HI-CAP 100. Gel-Suc was associated with moderate quantities of broken microcapsules while HI-CAP 100 generated numerous microcapsules with characteristic dents generated during spray-drying.

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Section: Resultssupporting

confidence: 90%

The effects of rheological properties of wall materials on morphology and particle size distribution of microcapsule

Xie¹,

WANg²,

Lu³

et al. 2010

Czech J. Food Sci.

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“…Thermal stability of PAMAM-based polyurea was extended up to 351°C which is far higher than the conventional, polyurea, polyurethane, phenol formaldehyde, and urea formaldehyde shell microcapsules with thermal stability around 280°C. [24,[28][29][30]34,39,42,43] This clearly indicated that composition of microcapsules contains about 60% of core and solvent while remaining part was due to PAMAM-based polyurea shell. It is also concluded from the TGA curve that PAMAM-based polyurea microcapsules possess higher thermal stability than conventional polyurea microcapsules prepared.…”

Section: Particle Size Analysismentioning

confidence: 99%

Fabrication of dendritic 0 G PAMAM-based novel polyurea microcapsules for encapsulation of herbicide and release rate from polymer shell in different environment

Hedaoo

Tatiya

Mahulikar

et al. 2013

Designed Monomers and Polymers

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New sequence of microcapsules with dendritic PAMAM-based novel polyurea as shell wall material containing herbicide as a core moiety has been prepared by interfacial polymerization technique. Dendrimer-based polymeric microcapsules were fabricated with aim to study the effect of different reaction parameters such as surfactant dose, core loading, agitation speed, and amount of solvent on particle size, particle size distribution, and appearance of microcapsules. Prepared microcapsules were characterized by FTIR, thermo gravimetric analysis, particle size analysis, scanning electron microscope, and other microscopic technique. In present investigation, surfactant dose of 2.5% with 5 mL of solvent at 400 rpm was found to be optimum for fabrication of stable new polyurea microcapsules containing 1 g of core. The synthesized microcapsules with optimized parameters were evaluated quantitatively for controlled release study by gas chromatography in different environmental conditions. The highest percent release of core was found in acidic conditions compared to that of basic and least in neutral medium.

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“…Single-shell MF microcapsules were prepared by in situ polymerization in an O/W emulsion emulsion using the procedure described in other literatures [4], [20]- [22]. Briefly, emulsion of 15 ml fragrance in sodium dodecyl sulphate (SDS) solution was firstly prepared by dissolving various weights of SDS in 100 ml of distilled water (to provide 2, 4, 5 and 6 % w/v) SDS.…”

Section: B Preparation Of Single-shell Melamine-formaldehyde (Mf) MImentioning

confidence: 99%

“…Stabilization and protection of the core ingredients using porous polymer shell are its advantage of microencapsulation technique for ingredient delivery and long lasting release. Encapsulation of active ingredients, including flavors in polymer shell of urea-formaldehyde [1]- [4] and melamine-formaldehyde has been versatile [5]- [8]. Control of fragrance diffusion by barrier system of various types has been employed in fragrance prolongation, for instance, cyclodextrin host [9]- [10], solid-lipid nanoparticles [11], amphiphilic-crosslinked polymer network [12], double emulsion system [13], synthetic polymers formed by miniemulsion polymerization [14], coacervation with various carbohydrates [15]- [17], polymer blends [18] and multilayer microcapsules [19].…”

Section: Introductionmentioning

confidence: 99%

Influence of Shell Number on Loading Capacity of Microcapsules Containing Fragrance

Aldred¹,

Chokbundit²,

Saengsorn³

2017

IJCEA

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Abstract-Microcapsules of single-shell melamine-formaldehyde (MF) and double-shell urea-formaldehyde/melamine -formaldehyde (UF/MF) microcapsules loading with fragrance of varied concentrations were prepared using in situ polymerization. The microcapsules were analyzed using Scanning electron microscope (SEM) and Fourier transform infrared spectrometer (FT-IR). Loading capacity of fragrance in the microcapsules in term of percent weight of fragrance was determined using soxhlet extraction. From SEM images, shapes and sizes of single shell MF microcapsules were different depending on concentrations of fragrance and SDS added in the preparation procedure. FT-IR spectra of double-shell UF/MF microcapsules loaded fragrance presented absorption band of C=O at 1674 cm -1 as found in that of fragrance. Percent weight of fragrance in single-shell UF and double-shell UF/MF microcapsules substantially increased with increased concentration of fragrance. Additionally, loading capacity of fragrance in double-shell UF/MF microcapsules were higher than those in single-shell MF microcapsules at the same concentration of fragrance. This would lead to higher prolongation of fragrance release from double-shell UF/MF microcapsules than single-shell MF microcapsules and fulfill the end use applications.

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Preparation and Characterization of Microcapsules Containing Lemon Oil

Cited by 138 publications

References 18 publications

The effects of rheological properties of wall materials on morphology and particle size distribution of microcapsule

The effects of rheological properties of wall materials on morphology and particle size distribution of microcapsule

Fabrication of dendritic 0 G PAMAM-based novel polyurea microcapsules for encapsulation of herbicide and release rate from polymer shell in different environment

Influence of Shell Number on Loading Capacity of Microcapsules Containing Fragrance

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