Development of powder antifoamer by atmospheric pressure glow plasma

This review provides a comprehensive overview of scientific research on plasma treatment of polymer powders over the last 40 years. The current state of the art is described with special focus on basic research in the laboratory and commercially available technologies in industrial applications. Different reactor systems with low‐pressure and atmospheric pressure plasma are presented. Then, numerous application examples of plasma‐treated polymer powders are presented together with a brief overview of the experimental test results. Furthermore, the effects of the process parameters on the final properties of the polymer powders are discussed. Attempts are made to determine similarity parameters and correlations between the generated surface functionalities. Finally, some suggestions for future research are given.

Section: Reactor Design Considerationsmentioning

confidence: 99%

“…Electrode configurations applied for the plasma treatment of polymer powders in atmospheric pressure DBDs. (A) Concentric configuration with an annular discharge gap . (B) Co‐axial configuration with inner wire electrode .…”

Section: Reactor Design Considerationsmentioning

confidence: 99%

Plasma treatment of polymer powders – from laboratory research to industrial application

Arpagaus

Oberbossel

Rohr

2018

“…Although handling fine particulate materials to allow homogeneous plasma treatments is some what complicated, both under low and atmospheric pressure conditions, and requires special reactor designs and geometries, many examples exist, in fact, of plasma processing of organic and inorganic powders 7–19. Few studies have been reported, however, to the knowledge of the authors, on the possibility of tuning the surface acid/base character of carbon‐based materials through plasma processes.…”

Section: Introductionmentioning

confidence: 99%

Tuning the Acid/Base Surface Character of Carbonaceous Materials by Means of Cold Plasma Treatments

Favia

Vietro

Mundo

et al. 2005

Carbonaceous materials, in the form of flat graphite slabs and carbon black granules, are surface-modified in radio frequency (RF, 13.56 MHz) glow discharges fed with NH3/O-2 mixtures at different power values, in order to graft oxygen-containing and/or nitrogen-containing chemical groups. In this way, it is possible to adjust the acid/base character of the material surfaces in a predictable way, as a function of the feed composition and of the power. A plasma reactor equipped with a rotating vacuum chamber and internal glass wings is used to keep the granular materials homogeneously stirred and to modify the surface of both graphite slabs and carbon black granules. The chemical modifications have been evaluated using X-ray photoelectron spectroscopy. Water contact angle measurements have been carried out on flat graphite, with water solutions at different pH, in order to study the acid/base character imparted to the functionalized surface. Scanning electron microscopy analysis has been performed to check the effects of plasma treatments on the morphology of the substrates

“…Although many investigators1–3 have already obtained fluorinated polymer coatings by low pressure plasma polymerization, we would like to achieve plasma polymerization of this material by atmospheric pressure glow (APG) plasma technique, because this technique has some advantages over the low pressure processes, especially alleviating the need for vacuum pumps 4–11. In our previous studies, we obtained some fluorinated plasma‐polymer (FPP) films using the APG plasma technique which had low enough adhesive strength for their use with PSA tapes.…”

Section: Introductionmentioning

confidence: 99%

Formation of Highly Releasing PET Surfaces by Atmospheric Pressure Glow Plasma Fluorination and Surface Roughening

Masutani

Nagai

Fujita

et al. 2007

Self Cite

Combined surface treatments using plasma fluorination and surface roughening were applied to investigate whether they could increase the peel property of PET beyond the value needed for use as a release coating of pressure‐sensitive adhesive tapes. The peel strength of PET treated with CF4/He APG plasmas decreased to approximately 100 N · m−1, but not quite to the ideal value of PTFE, 20 N · m−1. We also prepared PET with a rough surface (matte PET) to examine the effect of surface roughening. The matte PET peel strengths were decreased by plasma fluorination; the roughest matte PET showed even lower peel strength than PTFE. We conclude that the combined treatments could be effective in the formation of a surface with high peel property on PET.