Controlled Release Study of Phenol Formaldehyde Microcapsules Containing Neem Oil as an Insecticide

Bagle, Avinash V.; Jadhav, Rajendra S.; Gite, Vikas V.; Hundiwale, D. G.; Mahulikar, Pramod P.

doi:10.1080/00914037.2012.719142

Cited by 44 publications

(24 citation statements)

References 13 publications

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“…It is widely used as an engineered commodity material for coatings, thermal insulators, adhesives, and molding compounds based on several good characteristics such as superior mechanical properties, heat resistance, dimensional stability, and chemical resistance against solvents . In addition, PFR has become of interest lately for biological and medical applications . Compared with PTFE, which is also chemically resistant to microfluidic applications , PFR has the advantages of a lower cost as well as easier microstructure fabrication than PTFE , especially for applications in the field of microsystems.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of uniform poly(d,l‐lactide) and poly(d,l‐lactide‐co‐glycolide) microspheres using a microfluidic chip for comparison

et al. 2013

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Applications of poly(l-lactide) (PLA) and poly(d,l-lactide-co-glycolide) (PLGA) microspheres are widely used in the biomedical and pharmaceutical fields. The effects of PLA/PLGA on microsphere properties when using conventional particulate preparation methods are not easily defined due to the uncontrollable particle size and size distribution. This study was aimed to synthesize uniform PLA and PLGA microspheres using a phenol formaldehyde resin-based microfluidic chip, which has the advantage of being solvent-resistant, flexible, and is readily disassembled for cleaning. The proposed chip can rapidly fabricate reproducible PLA and PLGA microspheres. Uniform emulsion droplets can be achieved by hydrodynamic flow focusing. After solvent evaporation, the free-flowing PLA and PLGA microspheres have a high level of morphological uniformity and size, allowing for a clear comparison of material effects. The results indicate that the sizes of the PLA and PLGA microspheres for the various flow rates of dispersed/continuous phases are very similar. The PLA/PLGA materials do not have a significant effect on particle size, but the particle surface indicates a different morphology. The result of the cytotoxicity evaluation shows no difference between PLA and PLGA and ensures the biocompatibility of both prepared PLA and PLGA microspheres for biomedical and pharmaceutical applications in the future.

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Section: Introductionmentioning

confidence: 99%

Synthesis of uniform poly(d,l‐lactide) and poly(d,l‐lactide‐co‐glycolide) microspheres using a microfluidic chip for comparison

et al. 2013

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“…The release rate (%) of pendimethalin was calculated via the following equation and the data were expressed as the % released. [7] %…”

Section: Weight Loss On Drying Studymentioning

confidence: 99%

“…Microencapsulation finds potential extensive applications in the agricultural, industrial, engineering, and medical fields such as carbonless copying paper, flame retardants, pharmaceutical applications, foods, catalysis, self-healing materials, phase change materials, and pesticides. [7][8][9][10][11][12][13][14][15][16] By utilizing an interfacial polymerization technique, microcapsules with different polymeric shell walls like polyamide, polyurethane, and polyurea were fabricated to achieve resistance for infectiousness, superior compatibility, chemical stability in conjunction to excellent physical and thermal properties. [17][18][19][20][21] The shell is often made of synthetic or natural thin polymeric membranes to be used effectively for controlled release, reduction in phytotoxicity, end user safety, etc.…”

Section: Introductionmentioning

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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“…Pesticides are important labour-savings agrochemicals, used for improving the quality and quantity of agricultural products. However, excess use and misuse of pesticides have resulted in environmental pollution having adverse effects on the ecosystem and loss of diversity [ 2 ] Controlled release techniques can improve the utilization of pesticides, as well as reduce the frequency of agrochemical application [ 3 ].…”

Section: Introductionmentioning

confidence: 99%

Design and application of polyurea microcapsules containing herbicide (oxyfluorfen)

Rao

Chandrani

Powar

et al. 2020

Designed Monomers and Polymers

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Polyurea, a controlled release material, has been widely applied in agricultural fields due to high thermal stability and low cost. In this article oxyfluorfen polyurea microcapsules suspension was successfully prepared by interfacial polymerization using diisocyanate and polyamines such as Ethylenediamine, Hexamethylenediamine, Diethylenetriamine in presence of green solvent, i.e., N, N-dimethyldecanamide. The microcapsule suspension of oxyfluorfen has not been researched yet by using solvent N,N-dimethyldecanamide and polyamines. The effect and the type of diamines on the morphology and properties of the microcapsules have been investigated. The synthesized microcapsules were characterized by scanning electron microscope, ultraviolet spectrometry, Fourier transform iInfrared spectrometer, thermogravimetric analysis and particle size analyser. The effect of the core to shell ratio on encapsulation efficiency and release kinetics were also studied. The oxyfluorfen microcapsules had an excellent encapsulation efficiency (98.2%) using EDA as the monomer and Release kinetics depended upon the type of monomers used and also on core to shell ratio used (6.5:1, 5:1, 4:1). As core to shell ratio was increased the encapsulation efficiency was found to decrease. Prepared Microcapsules when sprayed on paddy crop was found to be safe in comparison with Emulsifiable concentrate sample.

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Controlled Release Study of Phenol Formaldehyde Microcapsules Containing Neem Oil as an Insecticide

Cited by 44 publications

References 13 publications

Synthesis of uniform poly(d,l‐lactide) and poly(d,l‐lactide‐co‐glycolide) microspheres using a microfluidic chip for comparison

Synthesis of uniform poly(d,l‐lactide) and poly(d,l‐lactide‐co‐glycolide) microspheres using a microfluidic chip for comparison

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

Design and application of polyurea microcapsules containing herbicide (oxyfluorfen)

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