Preparation and Release Characteristics of Biodegradable Microcapsules Encapsulating Activated Carbon Impregnated with Pesticide Using the Solvent Evaporation Method

Shiomori, Koichiro; Taniguchi, Jin; Kiyoyama, Shiro; Kawano, Yoshinobu; Hatate, Yasuo

doi:10.1252/jcej.37.357

Cited by 9 publications

(6 citation statements)

References 10 publications

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“…Recently, coacervation has been used in fungicide encapsulation of ediphenphos (Tsuiji, 2001) and pheromones (Chen et al, 2007). Through the extraction-evaporation of the dissolvent, plaguicides have been encapsulated in diverse polymers such as poly-e-caprolactone, polyarylsulfone, methacrylate, and various types of cellulose (Dowler et al, 1999;Teff and Friend, 1993;Shiomori et al, 2004). However, the results obtained varied considerably according to the type of plaguicide and polymer considered (Dailey et al, 1993;Dailey and Dowler, 1998;Sopeña et al, 2005;2007a).…”

Section: Methods Usually Used In Herbicide Microencapsulationmentioning

confidence: 99%

Controlled release formulations of herbicides based on micro-encapsulation

2009

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F. Sopeña, C. Maqueda, and E. Morillo. 2009. Controlled release formulations of herbicides based on micro-encapsulation. Cien. Inv. Agr. 36(1): 27-42. Annual worldwide losses to weeds are estimated to comprise approximately 10-15% of attainable production among principal food sources. Worldwide consumption of herbicides represents 47.5% of the 2 million tons of pesticide consumed each year. However, the heavy use of herbicides has given rise to serious environmental and public health problems. It is therefore important to develop new herbicide formulations that are highly effective, that are safer (for the worker and for the environment), and that involve a low cost/production ratio. In this sense, controlled release formulations of herbicides have become necessary in recent years, since they often increase herbicide effi cacy at reduced doses. The present work reviews in detail the components of various types of herbicide formulations, with an emphasis on controlled release formulations and micro-encapsulation.

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Section: Methods Usually Used In Herbicide Microencapsulationmentioning

confidence: 99%

Controlled release formulations of herbicides based on micro-encapsulation

2009

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“…e S/O suspension was added to the outer aqueous phase contain-ing a desirable concentration of the PVA at 313 K, and the mixture was stirred at 370 rpm to produce the S/O/W emulsion. e S/O/W emulsion was stirred, as demonstrated in a previous paper (Shiomori et al, 2004), at 370 rpm and 313 K for 8 h, with the continuous evacuation of solvent vapor at 7.2×10 2 mmHg. e microcapsules were ltered with a vacuum pump.…”

Section: Preparation Of Microcapsulementioning

confidence: 99%

“…erefore, a water containing microcapsule was prepared by researchers (Kentepozidou and Kiparissides, 1995;Taguchi et al, 2019), using the W/O/W system. However, the S/O/W emulsion system is not usually adopted, except in few studies, including our previous study, which focused on the preparation and release characteristics of biodegradable microcapsules encapsulating activated carbon impregnated with pesticide using the solvent evaporation method (Shiomori et al, 2004). A multiple emulsion system is the result of double dispersion.…”

Section: Introductionmentioning

confidence: 99%

“…Hence, two surfactants are generally required in the W/O/W system. In our previous study (Kiyoyama et al, 2003;Shiomori et al, 2004), multicore microcapsules were prepared by the complex emulsion system stabilized with a cosurfactant and via the Pickering method. It is necessary to control the internal structure, especially for a given durability.…”

Section: Introductionmentioning

confidence: 99%

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Preparation of Polystyrene Microcapsules Containing Saline Water Droplets via Solvent Evaporation Method and Their Structural Distribution Analysis by Machine Learning

Batchuluun

Matsune

Shiomori

et al. 2021

J. Chem. Eng. Japan

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Most microcapsule preparation methods produce a population of microcapsules in a bulk solution. To control the microcapsule preparation or obtain an optimal preparation condition, the mechanism of the microcapsule preparation should be investigated. The mechanism is estimated via structure reformation during the preparation process because diameter and wall thickness are drastically altered in the solution. Considering microcapsule applications, some important properties, such as the mechanical properties of microcapsules and release rate of the encapsulated product, depend on the microcapsule structure. In this study, polystyrene microcapsules containing saline water droplets were prepared via the solvent evaporation method from a solid-in-oil-in-water (S/O/W) emulsion system. The microcapsules exhibited a speci c structural distribution, which comprised monocore, multicore, and solidcore structures. The structural distribution was altered by the preparation condition. The monocore structure was absolutely dominant owing to the increase in the amount of calcium chloride added in the organic phase. The salt concentration is not the sole controlling factor of the microcapsule structure, as the surfactant and dispersion exerted a signi cant impact on the microcapsule structure. The structural distribution was automatically analyzed by a machine learning algorithm (MLA). The decision-making time for the microcapsules preparation was shortened by the accelerated structure determination, and the accuracy was improved by increasing the number of counting particles.

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“…Therefore, the outer morphology of microcapsules has an essential role in the interface between medium and microcapsules during their interactions. In the beginning, a microcapsule is used for stable release which has a huge impact on the drug delivery system [1]. Later microcapsule containing drug was combined with a selective group that can connect special sites of receptors [2,3].…”

Section: Introductionmentioning

confidence: 99%

Effect of Trioctylamine on Microstructure of Water Containing Polystyrene Microcapsules

Batchuluun,

Yasui,

Matsune

et al. 2023

Advances in Physics Research

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Microencapsulation technology has been used in a variety of fields including materials such as buildings, walls, industrial, medicine, and cosmetics. One of the most active research on microencapsulation is microstructure formation. Important properties of microcapsules such as releasing rate of active agent are depending on their microstructure. Same as the strength of bridges, skyscrapers, and buildings is characterized by their geometry, and the strength of microcapsules is also influenced by their microstructure. The effect of trioctylamine on the morphology of polystyrene microcapsules was investigated. The influence of trioctylamine was on both the inner and outer morphology of microcapsules. On outer morphology, two types which are smooth and crown were observed. Three types of inner morphology of microcapsules were classified. The inner morphologies are evenly spaced, clustered, and randomly spaced. The morphologies of the crown and evenly spaced were small in size.

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Preparation and Release Characteristics of Biodegradable Microcapsules Encapsulating Activated Carbon Impregnated with Pesticide Using the Solvent Evaporation Method

Cited by 9 publications

References 10 publications

Controlled release formulations of herbicides based on micro-encapsulation

Controlled release formulations of herbicides based on micro-encapsulation

Preparation of Polystyrene Microcapsules Containing Saline Water Droplets via Solvent Evaporation Method and Their Structural Distribution Analysis by Machine Learning

Effect of Trioctylamine on Microstructure of Water Containing Polystyrene Microcapsules

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