Surface tension characterization of plasma treated powders as a process control for industrial application

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F46747885%3A24220%2F16%3A00000494" target="_blank" >RIV/46747885:24220/16:00000494 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Surface tension characterization of plasma treated powders as a process control for industrial application

Original language description

Determination of surface tension is a standard control method of materials treated by plasma before adhesive bonding or varnishing. Fast and simple methods are used in industry during process control e.g. contact angle analysis or determination of surface energy by test inks. These methods can be successfully used for solid and compact materials. Difficulties occur while trying to establish surface tension at powders. Several methods can be used to determinate surface characteristics of powder materials. Melting a powder to a plate is one of the methods enabling an application of the same techniques as for solid materials. Washburn is another method used to characterize surface wettability and is directly specified for powder materials. These methods cannot be used for all materials and some are not suitable for industrial application due to time consumed and high costs. Fast and reliable method is necessary in order to quality control during production of plasma treated powders. For a reliable process control a method independent on variable powder parameters e.g. particle size distribution and-or particles roughness is desired. Detailed analysis of a large amount of Washburn data from the control of a serial production was performed. The results from Washburn data were compared with contact angle measurements on the powder adhered on an adhesive tape. Ability of powder to disperse in water was also tested and ECSA analyses was performed on selected samples. Based on this analyses a method for on-line process control was proposed.

Czech name

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Czech description

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Type

O - Miscellaneous

CEP classification

BL - Plasma physics and discharge through gases

OECD FORD branch

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Project

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Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2016

Confidentiality

C - Předmět řešení projektu podléhá obchodnímu tajemství (§ 504 Občanského zákoníku), ale název projektu, cíle projektu a u ukončeného nebo zastaveného projektu zhodnocení výsledku řešení projektu (údaje P03, P04, P15, P19, P29, PN8) dodané do CEP, jsou upraveny tak, aby byly zveřejnitelné.