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4 results on '"security fibres"'

2. Paper Doped with Polyacrylonitrile Fibres Modified with 10,12–Pentacosadiynoic Acid

Author

Elżbieta Sąsiadek, Konrad Olejnik, and Marek Kozicki

Subjects
functionalized cellulosic material, paper, ultraviolet radiation sensor, security system, security fibres, modified polyacrylonitrile fibres, Technology, Electrical engineering. Electronics. Nuclear engineering, TK1-9971, Engineering (General). Civil engineering (General), TA1-2040, Microscopy, QH201-278.5, Descriptive and experimental mechanics, QC120-168.85
Abstract

This work reports a modification of a fibrous cellulose material (paper) by the addition of polyacrylonitrile (PAN) fibres doped with 10,12–pentacosadiynoic acid (PDA). The fibres are sensitive to ultraviolet (UV) light. When the paper containing PAN–PDA is irradiated with UV light it changes colour to blue as a consequence of interaction of the light with PDA. The colour intensity is related to the absorbed dose, content of PAN–PDA fibres in the paper and the wavelength of UV radiation. The features of the paper are summarised after reflectance spectrophotometry and scanning microscopy analyses. All the properties of the modified paper were tested in accordance with adequate ISO standards. Moreover, a unique method for assessing the unevenness of the paper surface and the quality of printing was proposed by using a Python script (RGBreader) for the analysis of RGB colour channels. The modification applied to the paper can serve as a paper security system. The modified paper can act also as a UV radiation indicator.

Published
2021
Full Text
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3. Paper Doped with Polyacrylonitrile Fibres Modified with 10,12–Pentacosadiynoic Acid

Author

Konrad Olejnik, Elżbieta Sąsiadek, and Marek Kozicki

Subjects
Technology, Materials science, modified polyacrylonitrile fibres, 02 engineering and technology, Radiation, 010402 general chemistry, medicine.disease_cause, 01 natural sciences, Article, security system, ultraviolet radiation sensor, chemistry.chemical_compound, functionalized cellulosic material, Spectrophotometry, medicine, General Materials Science, Irradiation, Cellulose, Microscopy, QC120-168.85, medicine.diagnostic_test, paper, Doping, QH201-278.5, Polyacrylonitrile, security fibres, 021001 nanoscience & nanotechnology, Engineering (General). Civil engineering (General), 0104 chemical sciences, TK1-9971, Wavelength, Chemical engineering, chemistry, Descriptive and experimental mechanics, Electrical engineering. Electronics. Nuclear engineering, TA1-2040, 0210 nano-technology, Ultraviolet
Abstract

This work reports a modification of a fibrous cellulose material (paper) by the addition of polyacrylonitrile (PAN) fibres doped with 10,12–pentacosadiynoic acid (PDA). The fibres are sensitive to ultraviolet (UV) light. When the paper containing PAN–PDA is irradiated with UV light it changes colour to blue as a consequence of interaction of the light with PDA. The colour intensity is related to the absorbed dose, content of PAN–PDA fibres in the paper and the wavelength of UV radiation. The features of the paper are summarised after reflectance spectrophotometry and scanning microscopy analyses. All the properties of the modified paper were tested in accordance with adequate ISO standards. Moreover, a unique method for assessing the unevenness of the paper surface and the quality of printing was proposed by using a Python script (RGBreader) for the analysis of RGB colour channels. The modification applied to the paper can serve as a paper security system. The modified paper can act also as a UV radiation indicator.

Published
2021

4. Paper Doped with Polyacrylonitrile Fibres Modified with 10,12–Pentacosadiynoic Acid.

Author

Sąsiadek, Elżbieta, Olejnik, Konrad, and Kozicki, Marek

Subjects
*POLYACRYLONITRILES, *FIBERS, *ABSORBED dose, *ULTRAVIOLET radiation, *DOPING agents (Chemistry), *SECURITY systems
Abstract

This work reports a modification of a fibrous cellulose material (paper) by the addition of polyacrylonitrile (PAN) fibres doped with 10,12–pentacosadiynoic acid (PDA). The fibres are sensitive to ultraviolet (UV) light. When the paper containing PAN–PDA is irradiated with UV light it changes colour to blue as a consequence of interaction of the light with PDA. The colour intensity is related to the absorbed dose, content of PAN–PDA fibres in the paper and the wavelength of UV radiation. The features of the paper are summarised after reflectance spectrophotometry and scanning microscopy analyses. All the properties of the modified paper were tested in accordance with adequate ISO standards. Moreover, a unique method for assessing the unevenness of the paper surface and the quality of printing was proposed by using a Python script (RGBreader) for the analysis of RGB colour channels. The modification applied to the paper can serve as a paper security system. The modified paper can act also as a UV radiation indicator. [ABSTRACT FROM AUTHOR]

Published
2021
Full Text
View/download PDF

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