Microencapsulation of Essential Oils by Interfacial Polimerization Using Polyurea as a Wall Material

Ferrándiz, Marcela; Capablanca, Lucía; Eva, Bou; Guzonas, David; Ángeles, Bonet Mª; Luis, Bartolome

doi:10.4236/jeas.2015.54014

Cited by 13 publications

(9 citation statements)

References 15 publications

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“…Spectroscopic analysis of PO encapsulation revealed that 87.4% of the oil was encapsulated (EE) by the only monomer isocyanates (0.1%) compared to the earlier report (EE = 94–98.4%) with a high amount (2–7%) of monomers ( Marcela et al., 2015 ). Optimum level of encapsulation of oil inside the polyurea shell was successful under medium mixing at 400–500 rpm rather than lower (50–100 rpm) or higher (>2000 rpm) stirring speed.…”

Section: Resultscontrasting

confidence: 67%

“…Polyurea is an elastomer membrane, insoluble in water and deteriorates slowly ( Marcela et al., 2015 ). The release of PO might have been facilitated through diffusion or after bursting of the wall membrane.…”

Section: Resultsmentioning

confidence: 99%

“…Release of PO from the suspended microcapsules in the formulation was determined following the modified method of Marcela et al. (2015) .…”

Section: Methodsmentioning

confidence: 99%

“…(1) 2.6.1. In-vitro release of encapsulated PO Release of PO from the suspended microcapsules in the formulation was determined following the modified method of Marcela et al (2015). Time-dependent release of PO formulation (4 mL) was studied in the mixture of n-hexane and deionized water (1:3 v/v).…”

mentioning

confidence: 99%

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Encapsulation, release and insecticidal activity of Pongamia pinnata (L.) seed oil

Purkait

Mukherjee

Hazra

et al. 2021

Heliyon

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Pongamia pinnata (L.) seed oil is effective for its insecticidal and larvicidal activities. However, its low aqueous solubility, high photosensitivity, and high volatility restrict its application for the control of agricultural pests. Encapsulation can be an effective technique to overcome such hindrances. Therefore, P. pinnata oil (PO) was extracted from its seeds and analyzed for karanjin content (3.18%) by GC-MS/MS as the marker compound. Micro-encapsulation (MC) of PO was prepared by interfacial polymerization between isocyanates and polyamine and tested for insecticidal and larvicidal activities. Bioassay of the developed formulations was tested in-vitro against 2 nd instar larvae of Bombyx mori (Bivoltine hybrid) and in-vivo insecticidal bio-efficacy was tested against aubergine aphid ( Aphis gossypii G.) and whitefly ( Bemisia tabaci G.). Various properties of micro-capsules viz., stability, size, oil content and release kinetics were examined. Average diameter of capsules (1 μm) with Zeta potential (-16 mV) was indicated by the Dynamic Light Scattering (DLS) instrument. Existence of PO in the microcapsules was confirmed by an optical microscopic study. Spectroscopic analysis revealed 87.4% of PO was encapsulated in polyurea shell. The shelf-life ( T 10 ), half-life ( T 50 ), and expiry-life ( T 90 ) of polyurea coated capsules were 11.4, 75.3 and 250.0 h, respectively. Polyurea coated PO capsule formulation showed evidence of in-vitro toxicity against 2 nd instar larvae of B. mori ( LC 50 = 1.1%; LC 90 = 5.9%). The PO formulation also exhibited 67.0–71.8% and 62.4–74.8% control of aphid and whitefly population in aubergine at 4.0% dose following 7–14 days after application. The study unveiled its significance in developing controlled release herbal formulations of P. pinnata as an alternative to harmful conventional synthetic insecticides for crop protection.

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Section: Resultscontrasting

confidence: 67%

Section: Resultsmentioning

confidence: 99%

“…Release of PO from the suspended microcapsules in the formulation was determined following the modified method of Marcela et al. (2015) .…”

Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

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Encapsulation, release and insecticidal activity of Pongamia pinnata (L.) seed oil

Purkait

Mukherjee

Hazra

et al. 2021

Heliyon

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“…This may be due to the influence of preparation conditions, core and shell‐material concentration, and liquor ratio. The results are on par with the study stated – the microcapsules were formed at lower concentrations of polymers, but their morphology was irregular …”

Section: Resultsmentioning

confidence: 99%

Antimicrobial and aroma finishing of organic cotton knits using natural colourants and Palmarosa oil microcapsules

Kudligi

Malligawad

Naikwadi

et al. 2019

Flavour & Fragrance J

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Organic cotton SAHANA variety spun into 30s single yarn dyed with four natural colorants (Arecanut slurry, Eucalyptus leaves, Pomegranate rind and Indigo) and further used for development of single jersy knits. Palmarosa oil was used for the preparation of microcapsules through interfacial polymerization technique and finished on organic knitted fabric by exhaust and pad dry cure methods. The finished organic knit was assessed for effect of laundering on antimicrobial efficiency and aroma intensity. The TGA of Palmarosa microcapsules was found to be better with minimum weight loss at higher temperature than the pure oil, and the morphology of microcapsules was fairly irregular due to preparation conditions. Among the natural colourants, cotton yarn dyed with indigo dye possessed greater colour strength and lesser reflectance than the other dyed samples. The fastness properties of cotton yarn dyed with arecanut slurry exhibited good to excellent colour fastness to washing and sunlight. Irrespective of methods of application, organic cotton knits finished with microcapsules by pad dry cure method showed maximum zone of inhibition compared to knits finished by exhaust method against Staphylococcus aureus and Escherichia coli. The antimicrobial activity of the finished samples was subjected to multiple washing which indicated that knits finished with pad dry cure method showed a zone of inhibition even after 20th wash and better aroma retention compared to knits finished with exhaust method of application. Thus, the Palmarosa microencapsulated organic cotton knits are free from hazardous chemicals and have multi functional properties which can be suitable for medical and healthcare textiles.

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Chitosan-acrylate nanogel for durable anti mosquito finishing of cotton fabric and its dermal toxicity profiling on Swiss albino mice

Kala

Agarwal

Sogan

et al. 2019

Colloids and Surfaces B: Biointerfaces

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Microencapsulation of Essential Oils by Interfacial Polimerization Using Polyurea as a Wall Material

Cited by 13 publications

References 15 publications

Encapsulation, release and insecticidal activity of Pongamia pinnata (L.) seed oil

Encapsulation, release and insecticidal activity of Pongamia pinnata (L.) seed oil

Antimicrobial and aroma finishing of organic cotton knits using natural colourants and Palmarosa oil microcapsules

Chitosan-acrylate nanogel for durable anti mosquito finishing of cotton fabric and its dermal toxicity profiling on Swiss albino mice

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