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Surface modification of paper on a c...

Cruz-Barba, Luis Emilio.

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Surface modification of paper on a continuous atmospheric-pressure-plasma system.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Surface modification of paper on a continuous atmospheric-pressure-plasma system./
作者:	Cruz-Barba, Luis Emilio.
面頁冊數:	102 p.
附註:	Source: Dissertation Abstracts International, Volume: 64-08, Section: B, page: 3992.
Contained By:	Dissertation Abstracts International64-08B.
標題:	Engineering, Materials Science. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3101448
ISBN:	0496490369

Surface modification of paper on a continuous atmospheric-pressure-plasma system.
Cruz-Barba, Luis Emilio.

Surface modification of paper on a continuous atmospheric-pressure-plasma system. - 102 p.

Source: Dissertation Abstracts International, Volume: 64-08, Section: B, page: 3992.

Thesis (Ph.D.)--The University of Wisconsin - Madison, 2003.

Plasma technologies for the continuous modification of materials in atmospheric-pressure-plasma conditions were used to evaluate the surface modification of paper under different plasma conditions. The generation of hydrophobic layers was used to characterize the efficiency of the originally designed system for future application in the paper industry. Generation of hydrophobic layers was carried out by deposition of thin layers from fluorine containing gases, as well as cross-linking of pre-deposited thin layers of hydrophobic materials, such as fluoropolymers and silicones, in a continuous system plasma reactor (CSPR). Physical and chemical characterization of these layers was carried out by X-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM), scanning electron microscopy (SEM), contact angle goniometry, and water absorption evaluations. Pure gaseous CF4 and a CF4/CH4 mixture were used to deposit fluorinated layers, rendering paper surfaces with low to moderate relative surface atomic contents of fluorine (2.5 to 16.3%). Morphological characterization revealed that the deposition consists of small clusters of fluorinated species scattered on the surface. Contact angle evaluations (50°--70°) indicated a reduction in the water affinity of the paper.

ISBN: 0496490369Subjects--Topical Terms:

1017759
Engineering, Materials Science.

Surface modification of paper on a continuous atmospheric-pressure-plasma system.
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500 $a Source: Dissertation Abstracts International, Volume: 64-08, Section: B, page: 3992.
500 $a Supervisors: Raymond A. Young; Ferencz S. Denes.
502 $a Thesis (Ph.D.)--The University of Wisconsin - Madison, 2003.
520 $a Plasma technologies for the continuous modification of materials in atmospheric-pressure-plasma conditions were used to evaluate the surface modification of paper under different plasma conditions. The generation of hydrophobic layers was used to characterize the efficiency of the originally designed system for future application in the paper industry. Generation of hydrophobic layers was carried out by deposition of thin layers from fluorine containing gases, as well as cross-linking of pre-deposited thin layers of hydrophobic materials, such as fluoropolymers and silicones, in a continuous system plasma reactor (CSPR). Physical and chemical characterization of these layers was carried out by X-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM), scanning electron microscopy (SEM), contact angle goniometry, and water absorption evaluations. Pure gaseous CF4 and a CF4/CH4 mixture were used to deposit fluorinated layers, rendering paper surfaces with low to moderate relative surface atomic contents of fluorine (2.5 to 16.3%). Morphological characterization revealed that the deposition consists of small clusters of fluorinated species scattered on the surface. Contact angle evaluations (50°--70°) indicated a reduction in the water affinity of the paper.
520 $a Thin layers of fluoropolymer pre-deposited on paper surfaces were cross-linked in the presence of CF4, CF4/CH4, and NH 3 plasmas. All of the gases proved to be effective for the cross-linking under different conditions. These cross-linked layers were determined to maintain the original polymer structure, consisting mainly of CF2-CF 2 and small quantities of CFx. Surface characterization by AFM indicated lower roughness values compared to the untreated additive-free paper (45.1 vs 67.1 nm). Paper samples treated by this approach showed a highly hydrophobic character with up to 160° contact angles, and water absorption was reduced by as much as 61.6%.
520 $a Silicone layers were cross-linked in the presence of argon and oxygen plasmas. Characterization of the silicone-coated paper indicated, as in the case of fluoropolymers, the retention of the original chemical structure. Surface roughness values (AFM) were in the range of 11.8 to 18.2 nm, evidence of a very smooth surface. High hydrophobicity levels were reached, as shown by contact angles of up to 126°, and water absorption showed a maximum reduction of 76.8%.
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