The Experts below are selected from a list of 309 Experts worldwide ranked by ideXlab platform

Fardous Mobarak - One of the best experts on this subject based on the ideXlab platform.

  • introducing deinked old Newsprint as a new resource of electrical purposes paper
    Carbohydrate Polymers, 2008
    Co-Authors: Tamer Y A Fahmy, Magda G Elmeligy, Fardous Mobarak
    Abstract:

    Abstract Finding new uses for recycled paper (a cellulose rich raw material), and increasing the rate of recycling is beneficial to the environmental efficiency of the whole paper industry. The present work introduces, for the first time, deinked recycled old Newsprint as a new resource of electrical purposes paper. Impregnation of recycled deinked old Newsprint paper, by linseed oil, enhances the breaking length of paper and remarkably improves its electrical properties i.e., the dielectric constant increases greatly and the a.c. conductivity decreases significantly due to impregnation. It was found that the electrical properties of deinked recycled old Newsprint paper and its linseed oil impregnated counterpart, are close to the electrical properties of paper made from the more expensive virgin wood pulps and their linseed oil impregnated counterparts. In a series of research articles, the authors and others threw light for the first time on the electrical properties of paper made from agricultural residues pulps, and their linseed oil impregnated counterparts. Some, of the investigated agricultural residues papers, showed electrical properties close to wood papers, or even superior to it. This motivated the authors to expand the studies, on electrical properties of paper, to other cheap and abundant raw materials. Recycled old Newsprint is an abundant raw material that is cheaper than virgin wood pulps. Therefore, recycled deinked old Newsprint paper was chosen as a new raw material to study its electrical properties in this work. The effect of elevated temperatures on the electrical properties of paper is, also, studied. It is shown that improvement in electrical properties, due to impregnation, is sustained at elevated temperatures. Impregnated deinked recycled old Newsprint paper produced in this work finds its use as specialty electrical purposes paper.

  • introducing undeinked old Newsprint as a new resource of electrical purposes paper
    Wood Science and Technology, 2008
    Co-Authors: Tamer Y A Fahmy, Fardous Mobarak, Magda G Elmeligy
    Abstract:

    This work introduces, for the first time worldwide, undeinked recycled old Newsprint as a new resource of electrical purposes paper. Impregnation of undeinked recycled old Newsprint paper with linseed oil enhances the breaking length of paper and remarkably improves its electrical properties, i.e., the dielectric constant increases greatly and the a.c. conductivity decreases significantly due to impregnation. It was found that the electrical properties of the undeinked old Newsprint paper and its linseed oil impregnated counterpart are close to the electrical properties of paper made from the more expensive virgin wood pulps and their linseed oil impregnated counterparts. Using the undeinked pulp is more privileged than using the deinked pulp; because eliminating the deinking step saves money, time, and reagents. In addition, eliminating the deinking step improved the breaking length of paper. Electron dispersive X-ray elemental analysis (EDX) was used to investigate the undeinked and deinked pulps for residual elements originating from the printing materials. EDX was correlated to the slight differences in electrical properties of paper made from undeinked and deinked pulps. However, impregnation was able to overcome these slight differences. It was shown that improvement in electrical properties, due to impregnation, is sustained at elevated temperatures.

M G Paice - One of the best experts on this subject based on the ideXlab platform.

  • cellulase deinking of fresh and aged recycled Newsprint magazines onp omg
    Enzyme and Microbial Technology, 2008
    Co-Authors: Xiao Zhang, Sylvie Renaud, M G Paice
    Abstract:

    Three commercial cellulases were evaluated for their effects on deinking of both fresh and artificially aged old Newsprint (ONP) mixed with fresh old magazines (OMG) at a ratio of 7:3. The enzymes were added at the beginning of the repulping stage followed by incubation for up to 3 h. Although these enzymes were able to detach a significant amount of ink from the ONP/OMG, cellulase deinking was less efficient than either sulphite or alkaline deinking chemistry. None of the three cellulase enzymes tested were able to deink aged ONP/OMG, and a poor deinkability was also observed by using either sulphite or alkaline chemistry. However, combining enzymes with sulphite chemistry significantly enhanced sulphite deinking and provided a potential strategy to achieve effective deinking of aged Newsprint at neutral pH.

Tamer Y A Fahmy - One of the best experts on this subject based on the ideXlab platform.

  • introducing deinked old Newsprint as a new resource of electrical purposes paper
    Carbohydrate Polymers, 2008
    Co-Authors: Tamer Y A Fahmy, Magda G Elmeligy, Fardous Mobarak
    Abstract:

    Abstract Finding new uses for recycled paper (a cellulose rich raw material), and increasing the rate of recycling is beneficial to the environmental efficiency of the whole paper industry. The present work introduces, for the first time, deinked recycled old Newsprint as a new resource of electrical purposes paper. Impregnation of recycled deinked old Newsprint paper, by linseed oil, enhances the breaking length of paper and remarkably improves its electrical properties i.e., the dielectric constant increases greatly and the a.c. conductivity decreases significantly due to impregnation. It was found that the electrical properties of deinked recycled old Newsprint paper and its linseed oil impregnated counterpart, are close to the electrical properties of paper made from the more expensive virgin wood pulps and their linseed oil impregnated counterparts. In a series of research articles, the authors and others threw light for the first time on the electrical properties of paper made from agricultural residues pulps, and their linseed oil impregnated counterparts. Some, of the investigated agricultural residues papers, showed electrical properties close to wood papers, or even superior to it. This motivated the authors to expand the studies, on electrical properties of paper, to other cheap and abundant raw materials. Recycled old Newsprint is an abundant raw material that is cheaper than virgin wood pulps. Therefore, recycled deinked old Newsprint paper was chosen as a new raw material to study its electrical properties in this work. The effect of elevated temperatures on the electrical properties of paper is, also, studied. It is shown that improvement in electrical properties, due to impregnation, is sustained at elevated temperatures. Impregnated deinked recycled old Newsprint paper produced in this work finds its use as specialty electrical purposes paper.

  • introducing undeinked old Newsprint as a new resource of electrical purposes paper
    Wood Science and Technology, 2008
    Co-Authors: Tamer Y A Fahmy, Fardous Mobarak, Magda G Elmeligy
    Abstract:

    This work introduces, for the first time worldwide, undeinked recycled old Newsprint as a new resource of electrical purposes paper. Impregnation of undeinked recycled old Newsprint paper with linseed oil enhances the breaking length of paper and remarkably improves its electrical properties, i.e., the dielectric constant increases greatly and the a.c. conductivity decreases significantly due to impregnation. It was found that the electrical properties of the undeinked old Newsprint paper and its linseed oil impregnated counterpart are close to the electrical properties of paper made from the more expensive virgin wood pulps and their linseed oil impregnated counterparts. Using the undeinked pulp is more privileged than using the deinked pulp; because eliminating the deinking step saves money, time, and reagents. In addition, eliminating the deinking step improved the breaking length of paper. Electron dispersive X-ray elemental analysis (EDX) was used to investigate the undeinked and deinked pulps for residual elements originating from the printing materials. EDX was correlated to the slight differences in electrical properties of paper made from undeinked and deinked pulps. However, impregnation was able to overcome these slight differences. It was shown that improvement in electrical properties, due to impregnation, is sustained at elevated temperatures.

Magda G Elmeligy - One of the best experts on this subject based on the ideXlab platform.

  • introducing deinked old Newsprint as a new resource of electrical purposes paper
    Carbohydrate Polymers, 2008
    Co-Authors: Tamer Y A Fahmy, Magda G Elmeligy, Fardous Mobarak
    Abstract:

    Abstract Finding new uses for recycled paper (a cellulose rich raw material), and increasing the rate of recycling is beneficial to the environmental efficiency of the whole paper industry. The present work introduces, for the first time, deinked recycled old Newsprint as a new resource of electrical purposes paper. Impregnation of recycled deinked old Newsprint paper, by linseed oil, enhances the breaking length of paper and remarkably improves its electrical properties i.e., the dielectric constant increases greatly and the a.c. conductivity decreases significantly due to impregnation. It was found that the electrical properties of deinked recycled old Newsprint paper and its linseed oil impregnated counterpart, are close to the electrical properties of paper made from the more expensive virgin wood pulps and their linseed oil impregnated counterparts. In a series of research articles, the authors and others threw light for the first time on the electrical properties of paper made from agricultural residues pulps, and their linseed oil impregnated counterparts. Some, of the investigated agricultural residues papers, showed electrical properties close to wood papers, or even superior to it. This motivated the authors to expand the studies, on electrical properties of paper, to other cheap and abundant raw materials. Recycled old Newsprint is an abundant raw material that is cheaper than virgin wood pulps. Therefore, recycled deinked old Newsprint paper was chosen as a new raw material to study its electrical properties in this work. The effect of elevated temperatures on the electrical properties of paper is, also, studied. It is shown that improvement in electrical properties, due to impregnation, is sustained at elevated temperatures. Impregnated deinked recycled old Newsprint paper produced in this work finds its use as specialty electrical purposes paper.

  • introducing undeinked old Newsprint as a new resource of electrical purposes paper
    Wood Science and Technology, 2008
    Co-Authors: Tamer Y A Fahmy, Fardous Mobarak, Magda G Elmeligy
    Abstract:

    This work introduces, for the first time worldwide, undeinked recycled old Newsprint as a new resource of electrical purposes paper. Impregnation of undeinked recycled old Newsprint paper with linseed oil enhances the breaking length of paper and remarkably improves its electrical properties, i.e., the dielectric constant increases greatly and the a.c. conductivity decreases significantly due to impregnation. It was found that the electrical properties of the undeinked old Newsprint paper and its linseed oil impregnated counterpart are close to the electrical properties of paper made from the more expensive virgin wood pulps and their linseed oil impregnated counterparts. Using the undeinked pulp is more privileged than using the deinked pulp; because eliminating the deinking step saves money, time, and reagents. In addition, eliminating the deinking step improved the breaking length of paper. Electron dispersive X-ray elemental analysis (EDX) was used to investigate the undeinked and deinked pulps for residual elements originating from the printing materials. EDX was correlated to the slight differences in electrical properties of paper made from undeinked and deinked pulps. However, impregnation was able to overcome these slight differences. It was shown that improvement in electrical properties, due to impregnation, is sustained at elevated temperatures.

Xiao Zhang - One of the best experts on this subject based on the ideXlab platform.

  • cellulase deinking of fresh and aged recycled Newsprint magazines onp omg
    Enzyme and Microbial Technology, 2008
    Co-Authors: Xiao Zhang, Sylvie Renaud, M G Paice
    Abstract:

    Three commercial cellulases were evaluated for their effects on deinking of both fresh and artificially aged old Newsprint (ONP) mixed with fresh old magazines (OMG) at a ratio of 7:3. The enzymes were added at the beginning of the repulping stage followed by incubation for up to 3 h. Although these enzymes were able to detach a significant amount of ink from the ONP/OMG, cellulase deinking was less efficient than either sulphite or alkaline deinking chemistry. None of the three cellulase enzymes tested were able to deink aged ONP/OMG, and a poor deinkability was also observed by using either sulphite or alkaline chemistry. However, combining enzymes with sulphite chemistry significantly enhanced sulphite deinking and provided a potential strategy to achieve effective deinking of aged Newsprint at neutral pH.