Dry polymer powder coating and comparison with conventional liquid-based coatings for Eudragit® RS, ethylcellulose and shellac

Pearnchob, Nantharat; Bodmeier, Roland

doi:10.1016/s0939-6411(03)00121-8

Cited by 89 publications

(28 citation statements)

References 9 publications

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“…Particle size distribution was measured by Dry dispersion technique. Volume mean diameter (D [4,3]) was used to express average particle size in µm. Specific surface area (m 2 /gm) of the microspheres was also determined.…”

Section: Nsmentioning

confidence: 99%

“…Ethyl cellulose (EC) is hydrophobic polymer and is essentially tasteless, odorless, colorless and physiologically and pharmacologically inert. It has been extensively used as a pharmaceutical solid vehicle in preparing microcapsules, 3 coating material for tablets and [4][5][6] and matrix forming material for sustained release dosage forms. 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.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Nsmentioning

confidence: 99%

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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“…One of the advantages is that this method is environment-friendly by completely omitting volatile organic compounds and organic solvents [1][2][3]. Commonly used coating processes like electrostatic spraying, using a corona discharge, require electrically conductive substrate materials [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Atmospheric Pressure Plasma Coating of Wood and MDF with Polyester Powder

et al. 2017

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Abstract:In this study, polyester powder based on iso-and teraphthalic acid was deposited with an atmospheric plasma jet. The powder was fed into the effluent plasma zone and deposited on European beech wood (Fagus sylvatica L.), Grand fir (Abies grandis Lindl.) and medium density fiberboard (MDF). The substrates were annealed subsequent to the coating process. To exclude decomposition of the polyester layers by the plasma treatment, the surface chemistry of the layers has been examined by X-ray photoelectron spectroscopy (XPS) and Fourier-transform infrared spectroscopy (FTIR) and compared with the polyester powder reference. Furthermore, topographical investigations were carried out using laser scanning microscopy (LSM). Adhesive strength of the layers was evaluated by dolly test and gloss measurements with a goniophotometer. The deposited layers showed no chemical changes compared to the reference. The adhesive strength of the layer met practical requirements of >1 MPa. It was demonstrated that the deposition of a macroscopic layer is possible without a pretreatment or the usage of additives. Therefore this coating process by atmospheric pressure plasma for wood and wood based materials could represent an environmental-friendly alternative to conventional coating methods.

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“…Therefore, shellac is intensively applied as an additive in food products, where it has already played a major role as coating for confectionaries, fruits refreshing [3][4][5][6][7] and food field [8][9][10], after refining with sodium hypochlorite to remove residues such as Lac pigment and Lac wax associated with shellac. The shellac resin is also widely employed in the pharmaceutical industry [11][12][13][14]. It can develop the dosage of a drug released in forms of sustained and/or site specific means while shellac is used as enteric film polymers of drug [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Process and Kinetic Mechanism of Elimination of Chlorine Combined in Molecule of Bleached Shellac

Liao¹,

Zhou²,

Huang³

2015

Trop. J. Pharm Res

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Dry polymer powder coating and comparison with conventional liquid-based coatings for Eudragit® RS, ethylcellulose and shellac

Cited by 89 publications

References 9 publications

Study of Ethyl Cellulose Based Sustained Release Microspheres of Naproxen Sodium

Study of Ethyl Cellulose Based Sustained Release Microspheres of Naproxen Sodium

Atmospheric Pressure Plasma Coating of Wood and MDF with Polyester Powder

Process and Kinetic Mechanism of Elimination of Chlorine Combined in Molecule of Bleached Shellac

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