Microencapsulation

Thies, Curt

doi:10.1002/0471238961.1309031820080905.a01

Cited by 3 publications

(2 citation statements)

References 29 publications

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“…The main limitation of this approach is the difficulty in scaling up the process [65]. Nevertheless, a number of encapsulation developments have been carried out over the past years with the complex coacervation method.…”

Section: Complex Coacervationmentioning

confidence: 99%

Review of solid–liquid phase change materials and their encapsulation technologies

Darkwa

Kokogiannakis

2015

Renewable and Sustainable Energy Reviews

745

267

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Various types of solid-liquid phase change materials (PCMs) have been reviewed for thermal energy storage applications. The review has shown that organic solid-liquid PCMs have much more advantages and capabilities than inorganic PCMs but do possess low thermal conductivity and density as well as being flammable. Inorganic PCMs possess higher heat storage capacities and conductivities, cheaper and readily available as well as being non-flammable, but do experience supercooling and phase segregation problems during phase change process. The review has also shown that eutectic PCMs have unique advantage since their melting points can be adjusted. In addition, they have relatively high thermal conductivity and density but they possess low latent and specific heat capacities. Encapsulation technologies and shell materials have also been examined and limitations established. The morphology of particles was identified as a key influencing factor on the thermal and chemical stability and the mechanical strength of encapsulated PCMs. In general, in-situ polymerization method appears to offer the best technological approach in terms of encapsulation efficiency and structural integrity of core material. There is however the need for the development of enhancement methods and standardization of testing procedures for microencapsulated PCMs. Abstract: Various types of solid-liquid phase change materials (PCMs) have been reviewed for thermal energy storage applications. The review has shown that organic solid-liquid PCMs have much more advantages and capabilities than inorganic PCMs but do possess low thermal conductivity and density as well as being flammable. Inorganic PCMs possess higher heat storage capacities and conductivities, cheaper and readily available as well as being non-flammable, but do experience supercooling and phase segregation problems during phase change process. The review has also shown that eutectic PCMs have unique advantage since their melting points can be adjusted. In addition they have relatively high thermal conductivity and density but they possess low latent and specific heat capacities. Encapsulation technologies and shell materials have also been examined and limitations established. The morphology of particles were identified as a key influencing factor on the thermal and chemical stability and the mechanical strength of encapsulated PCMs. In general, in-situ polymerization method appears to offer the best technological approach in terms of encapsulation efficiency and structural integrity of core material. There is however the need for the development of enhancement methods and standardization of testing procedures for microencapsulated PCMs.

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Section: Complex Coacervationmentioning

confidence: 99%

Review of solid–liquid phase change materials and their encapsulation technologies

Darkwa

Kokogiannakis

2015

Renewable and Sustainable Energy Reviews

745

267

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“…7,8 But EC is considered as an ideal polymer for microencapsulation technology and it has been proved that EC can be used successfully for both oil-in-water and water-in-oil emulsion solvent evaporation technique. [9][10][11][12][13] Microencapsulation is one process used to control drug release and hence prolong therapeutic activity. 14 In pharmaceutical sustained release preparations, the uniqueness of microcapsules lies in the wide distribution throughout the gastrointestinal tract.…”

Section: Introductionmentioning

confidence: 99%

Study of Ethyl Cellulose Based Sustained Release Microspheres of Naproxen Sodium

Sarkar

Sadat

Islam

et al. 2012

Dhaka Univ. J. Pharm. Sci

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The present study was conducted to prepare sustained release microspheres of naproxen sodium using ethyl cellulose (Ethocel 20 cps) polymer. Three different plasticizers namely polyethyleneglycol 600 (PEG 600), polyethyleneglycol 6000 (PEG 6000) and triethyl citrate (TEC) were used at 10% (wt/wt) and 40% (wt/wt) level of the drug content. Prepared microspheres were characterized with respect to drug loading, microsphere particle size, microsphere surface morphology and release behavior. Surface morphology of the microspheres was examined in a scanning electron microscope. Drug release was observed in phosphate buffer solution of pH 6.8 for 8 hours. At 10% level of the plasticizers, percent release was 93.36%, 93.02% and 92.67% for PEG 600, PEG 6000 and TEC respectively after 8 hours. On the other hand, at 40% level, percent release was 81.12%, 70.06% and 51.12% for PEG 600, PEG 6000 and TEC respectively after the same duration. Release mechanisms followed case I or fickian model.

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Encapsulation in the Food Industry: A Brief Historical Overview to Recent Developments

Timilsena¹,

Haque²,

Adhikari³

2020

FNS

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Microencapsulation

Cited by 3 publications

References 29 publications

Review of solid–liquid phase change materials and their encapsulation technologies

Review of solid–liquid phase change materials and their encapsulation technologies

Study of Ethyl Cellulose Based Sustained Release Microspheres of Naproxen Sodium

Encapsulation in the Food Industry: A Brief Historical Overview to Recent Developments

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