New method of microwave plasma treatment of HDPE powders

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%

“…(C) Shell type configuration . (D) Rectangular cross‐section with parallel electrodes . (E) Rotating dielectric tube with external electrode bars .…”

Section: Reactor Design Considerationsmentioning

confidence: 99%

Section: Applicationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

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

Arpagaus

Oberbossel

Rohr

2018

Atmospheric‐Air Plasma Surface Modification of Polyethylene Powder

Pichal

Hladík

Špatenka

2009

The surface modification of polyethylene powder using a plasma reactor based on a dielectric barrier discharge in air at atmospheric pressure and ambient temperature is investigated. The process is inexpensive, and the necessity of any vacuum equipment and technical gases is alleviated. The efficiency of the modification process was successfully demonstrated by ESCA measurements that proved formation of new functional groups at the modified powder surface. The modification effect was also evaluated by means of dynamic capillarity rising measurements. Powder capillarity tests proved significant powder capillarity changes. The reduction of the modification effect was also limited (max. reduction of about 20% during 1 100 d after the modification date).magnified image

Investigation of Adhesion Between Metal and Plasma‐Modified Polyethylene

Horáková

Špatenka

Hladík

et al. 2011

The polyethylene (PE) coatings could be very promising for various branches of industry due to their chemical stability and impact resistance. Plasma modification of powder has recently attracted much interest because of new prospects to control the interfacial properties. Plasma modification also significantly enhanced the adhesion of the polymer to the substrate. Powders find wide application in various branches of industry like paintings, biotechnology, filling for composite materials etc., but the plasma modification of powder surface has not found such application as plasma modification of flat solid materials. This is due to problems connected with the three dimensional geometry, necessity of solid mixing (due to the aggregation phenomenon) and the large surface area of powders which should be treated. We investigated plasma modification of PE powder, its adhesion properties on steel surface and mechanism influencing this adhesion. PE powder was modified using various working gases and chemicals. It was found that adhesion properties were strongly influenced by concentration of oxygen containing groups and also by PE crosslinking after modification. The value of crosslinking depends on used working gas and chemicals. The ternary mixture of O2/H2O/methanol was found to be an appropriate working gas for plasma treatment of PE for adhesion purposes. The treated PE had good wettability, low crosslinking and very high adhesion to the steel substrate.