Controlled release in hard to access places by poly(methyl methacrylate) microcapsules triggered by gamma irradiation

Malgorzata Kostrzewska; Baoguang Ma; Irakli Javakhishvili; Jens H. Hansen; Søren Hvilsted; Anne L. Skov

doi:10.1002/pat.3532

Controlled release in hard to access places by poly(methyl methacrylate) microcapsules triggered by gamma irradiation

Malgorzata Kostrzewska, Baoguang Ma, Irakli Javakhishvili, Jens H. Hansen, Søren Hvilsted, Anne L. Skov

Research output: Contribution to journal › Journal article › Research › peer-review

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Abstract

Gamma irradiation was investigated as a triggering stimulus for the activation of poly(methyl methacrylate) (PMMA) microcapsules. PMMA was exposed to varying doses of irradiation and analyzed by differential scanning calorimetry, size-exclusion chromatography, and nuclear magnetic resonance. It was found that the glass transition temperature (Tg) of the polymer decreases at low irradiation doses. Additionally, Tg can be physically adjusted by adding a plasticizer, and both kinds of microcapsules were successfully prepared with non-plasticized and plasticized PMMA shell. Finally, impermeable microcapsules were shown to become permeable after irradiation and release an encapsulated cross-linker, which enables the remotely controlled formation of polydimethylsiloxanes in traditionally unavailable places. Therefore, the activation method has significant implications for industrial application.

Original language	English
Journal	Polymers for Advanced Technologies
Volume	26
Issue number	9
Pages (from-to)	1059-1064
ISSN	1042-7147
DOIs	https://doi.org/10.1002/pat.3532
Publication status	Published - 2015

Keywords

Microcapsule
Controlled release
Gamma irradiation

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10.1002/pat.3532

Post print Controlled release in hard to access places by PMMA microcapsules triggered by gamma irradiationAccepted author manuscript, 577 KB
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@article{1274725807ec40688bffbd8bc8c484eb,

title = "Controlled release in hard to access places by poly(methyl methacrylate) microcapsules triggered by gamma irradiation",

abstract = "Gamma irradiation was investigated as a triggering stimulus for the activation of poly(methyl methacrylate) (PMMA) microcapsules. PMMA was exposed to varying doses of irradiation and analyzed by differential scanning calorimetry, size-exclusion chromatography, and nuclear magnetic resonance. It was found that the glass transition temperature (Tg) of the polymer decreases at low irradiation doses. Additionally, Tg can be physically adjusted by adding a plasticizer, and both kinds of microcapsules were successfully prepared with non-plasticized and plasticized PMMA shell. Finally, impermeable microcapsules were shown to become permeable after irradiation and release an encapsulated cross-linker, which enables the remotely controlled formation of polydimethylsiloxanes in traditionally unavailable places. Therefore, the activation method has significant implications for industrial application.",

keywords = "Microcapsule, Controlled release, Gamma irradiation",

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year = "2015",

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language = "English",

volume = "26",

pages = "1059--1064",

journal = "Polymers for Advanced Technologies",

issn = "1042-7147",

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Controlled release in hard to access places by poly(methyl methacrylate) microcapsules triggered by gamma irradiation. / Kostrzewska, Malgorzata; Ma, Baoguang; Javakhishvili, Irakli; Hansen, Jens H.; Hvilsted, Søren; Skov, Anne L.

In: Polymers for Advanced Technologies, Vol. 26, No. 9, 2015, p. 1059-1064.

Research output: Contribution to journal › Journal article › Research › peer-review

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T1 - Controlled release in hard to access places by poly(methyl methacrylate) microcapsules triggered by gamma irradiation

AU - Kostrzewska, Malgorzata

AU - Ma, Baoguang

AU - Javakhishvili, Irakli

AU - Hansen, Jens H.

AU - Hvilsted, Søren

AU - Skov, Anne L.

PY - 2015

Y1 - 2015

N2 - Gamma irradiation was investigated as a triggering stimulus for the activation of poly(methyl methacrylate) (PMMA) microcapsules. PMMA was exposed to varying doses of irradiation and analyzed by differential scanning calorimetry, size-exclusion chromatography, and nuclear magnetic resonance. It was found that the glass transition temperature (Tg) of the polymer decreases at low irradiation doses. Additionally, Tg can be physically adjusted by adding a plasticizer, and both kinds of microcapsules were successfully prepared with non-plasticized and plasticized PMMA shell. Finally, impermeable microcapsules were shown to become permeable after irradiation and release an encapsulated cross-linker, which enables the remotely controlled formation of polydimethylsiloxanes in traditionally unavailable places. Therefore, the activation method has significant implications for industrial application.

AB - Gamma irradiation was investigated as a triggering stimulus for the activation of poly(methyl methacrylate) (PMMA) microcapsules. PMMA was exposed to varying doses of irradiation and analyzed by differential scanning calorimetry, size-exclusion chromatography, and nuclear magnetic resonance. It was found that the glass transition temperature (Tg) of the polymer decreases at low irradiation doses. Additionally, Tg can be physically adjusted by adding a plasticizer, and both kinds of microcapsules were successfully prepared with non-plasticized and plasticized PMMA shell. Finally, impermeable microcapsules were shown to become permeable after irradiation and release an encapsulated cross-linker, which enables the remotely controlled formation of polydimethylsiloxanes in traditionally unavailable places. Therefore, the activation method has significant implications for industrial application.

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KW - Controlled release

KW - Gamma irradiation

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