On-line and post irradiation analysis of swift heavy ion induced modification of PMMA (polymethyl-methacrylate)

Hossain, Umme Habiba; Lima, Vincent; Baake, Olaf; Severin, D.; Bender, Markus; Ensinger, Wolfgang

doi:10.1016/j.nimb.2013.10.074

Cited by 29 publications

(12 citation statements)

References 22 publications

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“…An increase in localized temperature also leads to chain scission in PMMA. As a result of chain scission, gases such as H 2 , CO, and CH 4 are released along the ion tracks [30]. These gases diffuse and are trapped by the ion-produced damages along the ion track, forming hillocks and craters on the surface of the implanted polymer [31].…”

Section: Topographical Analysismentioning

confidence: 99%

Surface topographical and structural analysis of Ag+-implanted polymethylmethacrylate

Arif

Rafique

Saleemi

et al. 2016

Nuclear Instruments and Methods in Physics Research Section B:

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Section: Topographical Analysismentioning

confidence: 99%

Surface topographical and structural analysis of Ag+-implanted polymethylmethacrylate

Arif

Rafique

Saleemi

et al. 2016

Nuclear Instruments and Methods in Physics Research Section B:

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“…Electrons would instigate the breaking of the chemical bonds and would create the excited as well as ionized species or the radicals along with the in-elastic scattering through contiguous molecules in polymers. It was observed that the different types of chemical change taken place in polymers in the process of irradiation like the formation of vacancy clusters, evolution of gases (H2, CO, CO2), generation of color centers, main chain scission(creation of new double bonds, C-C bond scission, radical combination (1,6). Usually, the cross linking method generates the chemical bonds between two adjacent polymer molecules, which would then results in the increase in molecular weight.…”

Section: Introductionmentioning

confidence: 99%

Energy loss and dielectric properties of γ-irradiated PMMA thin film

Devendrappa¹,

Biradar²,

Amabalagi³

et al. 2019

AIP Conference Proceedings

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The energy loss and dielectric properties of a polymer polymethylmethacrylate (PMMA) films was studied. The PMMA films were irradiated at a dose 8.5 kGy using the Co-60 source. The energy loss and dielectric properties of polymer films both before and after irradiation at room temperature have been studied. The dielectric constant of films after irradiation is found to be increased after irradiation this increase in the dielectric constant is mainly attributed to the creation of radiation induced charges in the film and the dielectric loss of the PMMA film is found to be decreased after gamma irradiation. The ac conductivity of PMMA films is found to increased after irradiation. The impedance of a PMMA is found to be decreased exponentially at lower frequency region and then it remained constant as the frequency increased. The impedance of the films increased after irradiation. The energy loss of α-particles with PMMA thin film at different pressures both before and after irradiation is found to be decreased with increase in the scattering chamber's pressure.

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“…No caso específico do PMMA, é utilizada para aumentar a rugosidade [19], melhorar as propriedades ópticas [20][21][22], químicas [21,22], estruturais [22], e aumentar a absorção de proteínas [23].…”

Section: Introductionunclassified

Implantação de Íons de Nitrogênio em PMMA Através de uma Fonte Kaufman

Fontoura¹,

Wanke²,

Aguzzoli³

2017

Sci. cum Ind.

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ResumoA modificação de superfícies é uma técnica que a engenharia tem feito uso há muito tempo, para melhoria de propriedades em materiais. O poli metil-metacrilato (PMMA), por ser um material de constante uso em aplicações biomédicas, exige que sua superfície apresente características favoráveis à adesão celular e compatibilidade com tecidos. Os polímeros, de uma maneira geral, quando submetidos a tratamentos em plasma, tendem a formar grupos funcionais que alteram propriedades ópticas, químicas, físicas e de biocompatibilidade. Em função disso, este trabalho propôs realizar a funcionalização de substratos de PMMA através da fonte de íons Kaufman. Amostras de PMMA foram submetidas ao feixe de íons de nitrogênio gerado pela fonte Kaufman, em diversas condições. A caracterização foi feita pelas técnicas de GD-OES, FTIR e EDS. Ficou comprovado, através do perfil de concentração de nitrogênio obtido por GD-OES, que a quantidade de nitrogênio na superfície aumenta gradativamente com o tempo de implantação e a potência. Outro indício foi a análise em FTIR, que mostrou presença de aminas nas faixas entre 1654-655 cm -1 e 3300-3700 cm -1 . A análise em EDS, porém, comprovou também a presença de ferro e cromo, agentes citotóxicos, que precisam ser eliminados para a continuidade dos trabalhos. Palavras-chaveImplantação de íons de nitrogênio, fonte de íons Kaufman, modificação superficial de PMMA Implantation of Nitrogen Ions through a Kaufman Ion Source AbstractSurface modification is a technique that engineering has been using for a long time, in order to improve the properties of materials. Poly (methyl methacrylate) (PMMA), for being a material of constant use in biomedical applications, demands that its surface offers favorable characteristics in cell adhesion and tissue compatibility. Polymers, generally speaking, when submitted to plasma treatments, tend to form functional groups that alter optical, chemical, physical and biocompatibility properties. Taking all of this into consideration, this work proposed to functionalize PMMA substrates through a Kaufman ion source. PMMA samples were submitted to a nitrogen ion beam generated through the Kaufman source, in different conditions. Characterization was carried out by the techniques of GD-OES, FTIR and EDS. It was proved, through nitrogen concentration profile obtained by GD-OES, that the amount of nitrogen in the surface increased gradually with implantation time and supplied power. The FTIR analysis was another evidence of nitrogen presence, as amines were detected in the bands between 1654-655 cm -1 and 3300-3700 cm -1 . The EDS analysis, though, proved that iron and chromium, cytotoxic agents, are also present and therefore, they must be eliminated from the process, so that future studies can be carried out.

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On-line and post irradiation analysis of swift heavy ion induced modification of PMMA (polymethyl-methacrylate)

Cited by 29 publications

References 22 publications

Surface topographical and structural analysis of Ag+-implanted polymethylmethacrylate

Surface topographical and structural analysis of Ag+-implanted polymethylmethacrylate

Energy loss and dielectric properties of γ-irradiated PMMA thin film

Implantação de Íons de Nitrogênio em PMMA Através de uma Fonte Kaufman

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