Abstract
Polyolefin particles are hydrophobic, and this prevents their use for various applications. Plasma treatment is an environment-friendly polyolefin hydrophilisation method. We developed an industrial-scale plant for plasma treatment of particles as small as micrometers in diameter. Materials such as PE waxes, UHMWPE and powders for rotomolding production were tested to verify their new surface properties. We achieved significantly increased wettability of the particles, so that they are very easily dispersive in water without agglomeration, and their higher surface energy is retained even after sintering in the case of rotomolding powders.
Highlights
Cold plasma surface modification has been established as an effective and low-cost technology for modifying the surface properties of polymer materials without altering the bulk material
Powders find a range of applications in many branches of industry, e.g. painting, biotechnology, and fillings for composite materials, plasma modification of the powder surface has not been applied for modifying flat solid materials
The aim of this paper is to present the process of powder surface modification and mainly new properties and the specific application of the modified material
Summary
Cold plasma surface modification has been established as an effective and low-cost technology for modifying the surface properties of polymer materials without altering the bulk material. Modification of plastic packaging foils, plastic headlights, or automobile bumpers prior to metallization or painting are examples of industrial applications. Powders find a range of applications in many branches of industry, e.g. painting, biotechnology, and fillings for composite materials, plasma modification of the powder surface has not been applied for modifying flat solid materials. This is due to problems connected with their three-dimensional geometry, the need for sophisticated mixing to overcome the aggregation phenomenon, and the large surface area of the powders that are to be modified. The aim of this paper is to present the process of powder surface modification and mainly new properties and the specific application of the modified material
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