XPS depth profile of plasma-activated surface of beech wood (Fagus sylvatica) and its impact on polyvinyl acetate tensile shear bond strength

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Authors

KRÁL Pavel RÁHEĽ Jozef STUPAVSKÁ Monika ŠRAJER Jan KLÍMEK Petr KUMAR Mishra Pawan RUPERT Wimmer

Year of publication 2015
Type Article in Periodical
Magazine / Source WOOD SCIENCE AND TECHNOLOGY
MU Faculty or unit

Faculty of Science

Citation
Web http://rdcu.be/mQ7n
Doi http://dx.doi.org/10.1007/s00226-014-0691-7
Field Plasma physics
Keywords barrier discharge; atmospheric-pressure; adhesion properties; air; wettability; extractives
Description High surface selectivity of atmospheric pressure plasma treatment was demonstrated experimentally by XPS depth profile measurement of plasma-activated beech wood. Wood surface activated by diffuse coplanar surface barrier discharge was sequentially sputtered by Ar+ ion beam followed by immediate XPS analysis of freshly uncovered surface. According to the assessment, less than 330 nm of sputtered material was sufficient for complete removal of all plasma-formed functional groups. For the sake of practical implications of minimal vertical extent of plasma-mediated changes, the character of tensile shear bond strength improvement of polyvinyl acetate adhesive was examined with respect to its specific mass. A constant additive character of plasma activation to the bond strength was observed within the examined range of adhesive-specific mass.
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