Cold atmospheric pressure plasma treatment for adhesion improvement on polypropylene surfaces

Kehrer, Matthias; Rottensteiner, Alena; Hartl, Wolfgang H.; Duchoslav, Jiri; Stehrer, T.; Stifter, David

doi:10.1016/j.surfcoat.2020.126389

Cited by 50 publications

(36 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Changes in roughness did not affect the resulting adhesion. On the other hand, in a bond between PP treated by a CAP jet and acrylate-based adhesion PSA tapes studied by Kehrer et al [17], changes in surface nanostructure were identified as the main reason behind the observed adhesion differences. As a general rule, adhesion increases with the increasing number of polar functionalities (providing more reactive bonds available to react with the adhesive) and higher surface roughness (increasing the area available for the adhesive-polymer interface).…”

Section: Introductionmentioning

confidence: 89%

“…Most of the plasma-induced functional groups exist at the top of the polymer in the form of low molecular weight oxidized materials (LMWOMs), which are shorter molecular chains created by ablation of a polymer through chain scissions [17,38]. In the C 1s high-resolution XPS spectrum, the LMWOMs' presence can be indicated by the large concentration of ester/carboxyl groups (O=C-O) terminating the PP chain [26].…”

Section: Presence Of Low Molecular Weight Oxidized Materialsmentioning

confidence: 99%

“…Throughout the years, several different non-thermal plasma discharges were used to treat polypropylene, namely low pressure [13][14][15], corona and dielectric barrier discharges (DBD) [16], and cold atmospheric plasma (CAP) jets [17,18]. The adhesion between a plasma-treated polymer and an adhesive is a complicated process influenced primarily by a combination of three main parameters, functional groups composition and concentration, surface morphology, and the amount of the light molecular weight oxidized matter (LMWOM).…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, the higher WCA value must have been caused by the changes in the surface structure not observable by confocal microscopy (Figure 6a). Kehrer et al [17] has recently reported a higher increase in nanoroughness (measured by AFM, the field of view 3 µm) for the PP surface treated in the N 2 arc-based cold atmospheric plasma jet than for the same jet utilizing air as a process gas. Our Ar/N 2 PSJ may have a similar effect resulting in the higher final WCA.…”

mentioning

confidence: 97%

See 3 more Smart Citations

Effect of Low Molecular Weight Oxidized Materials and Nitrogen Groups on Adhesive Joints of Polypropylene Treated by a Cold Atmospheric Plasma Jet

et al. 2021

View full text Add to dashboard Cite

Polypropylene is a typical representative of synthetic polymers that, for many applications including adhesive joints, requires an increase in wettability and chemical surface reactivity. Plasma processing offers efficient methods for such surface modifications. A particular disadvantage of the plasma jets can be the small plasma area. Here, we present a cold atmospheric plasma radio-frequency slit jet developed with a width of 150 mm applied to polypropylene plasma treatment in Ar, Ar/O2 and Ar/N2 We identified two main parameters influencing the tensile strength of adhesive joints mediated by epoxy adhesive DP 190, nitrogen content, and the amount of low molecular weight oxidized materials (LMWOMs). Nitrogen functional groups promoted adhesion between epoxy adhesive DP 190 and the PP by taking part in the curing process. LMWOMs formed a weak boundary layer, inhibiting adhesion by inducing a cohesive failure of the joint. A trade off between these two parameters determined the optimized conditions at which the strength of the adhesive joint increased 4.5 times. Higher adhesion strength was previously observed when using a translational plasma gliding arc plasma jet with higher plasma gas temperatures, resulting in better cross linking of polymer chains caused by local PP melting.

show abstract

Section: Introductionmentioning

confidence: 89%

Section: Presence Of Low Molecular Weight Oxidized Materialsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 97%

See 2 more Smart Citations

Effect of Low Molecular Weight Oxidized Materials and Nitrogen Groups on Adhesive Joints of Polypropylene Treated by a Cold Atmospheric Plasma Jet

et al. 2021

View full text Add to dashboard Cite

show abstract

“…S1 ). Enhancement of adhesion strength by using liquid primer coating or plasma treatment 44 for bonding process of actuator film could be effective to prevent the damage and improve the actuation lifetime. The results indicated that this simple film could be used for precise bending operation for approximately 8000 cycles with appropriate aging treatment.…”

Section: Resultsmentioning

confidence: 99%

Monolithic processing of a layered flexible robotic actuator film for kinetic electronics

Zhang

Wang

Hayashi

et al. 2021

Sci Rep

View full text Add to dashboard Cite

Low-invasive soft robotic techniques can potentially be used for developing next-generation body–machine interfaces. Most soft robots require complicated fabrication processes involving 3D printing and bonding/assembling. In this letter, we describe a monolithic soft microrobot fabrication process for the mass production of soft film robots with a complex structure by simple 2D processing of a robotic actuator film. The 45 µg/mm2 lightweight film robot can be driven at a voltage of CMOS compatible 5 V with 0.15 mm−1 large curvature changes; it can generate a force 5.7 times greater than its self-weight. In a durability test, actuation could be carried out over 8000 times without degradation. To further demonstrate this technique, three types of film robots with multiple degrees of freedom and a moving illuminator robot were fabricated. This technique can easily integrate various electrical circuits developed in the past to robotic systems and can be used for developing advanced wearable sensing devices; it can be called “Kinetic electronics”.

show abstract

Atmospheric Pressure Plasma Treatment of Polymers to Enhance Adhesion

Lachmann,

Omelan,

Neubert

et al. 2024

Polymer Surface Modification to Enhance Adhesion

View full text Add to dashboard Cite

Cold atmospheric pressure plasma treatment for adhesion improvement on polypropylene surfaces

Cited by 50 publications

References 45 publications

Effect of Low Molecular Weight Oxidized Materials and Nitrogen Groups on Adhesive Joints of Polypropylene Treated by a Cold Atmospheric Plasma Jet

Effect of Low Molecular Weight Oxidized Materials and Nitrogen Groups on Adhesive Joints of Polypropylene Treated by a Cold Atmospheric Plasma Jet

Monolithic processing of a layered flexible robotic actuator film for kinetic electronics

Atmospheric Pressure Plasma Treatment of Polymers to Enhance Adhesion

Contact Info

Product

Resources

About