Effect of different fillers on thermal conductivity, tribological properties of Polyamide 6

Abstract

An influence of different filler types and filler content on the thermal and abrasive wear properties of polyamide-6 is investigated. Al2O3, MgO, two glass powders with different SiO2 contents, and natural zeolite powder were selected as fillers. The fillers individually were added to the polymer matrix in proportions of 50 and 70% by weight. A hybrid filler-containing composite was created by mixing PA6/70 wt% MgO and PA6/80 wt% zeolite. The results show that the thermal conductive enhancement factor is highest for PA6/70 wt% Al2O3 (145%) and PA6/hybrid fillers 75 wt% (92%). The Lewis-Nielsen and Reciprocity models agreed with the measured data with less than 26% deviation, except for the MgO-loaded composites. In the case of a hybrid composite, the additive model proves to be a good approximation. The abrasive effect of the different fillers was characterised by the volume loss of the steel pin using the pin-on-disc method. A new parameter is developed that considers the thermal conductivity enhancing effect of the fillers and their abrasive effect. In addition to ceramic fillers, aluminium-hydro-silicate, e.g. natural zeolite, and their mixtures offer new opportunities for the development of thermally conductive composites, as they are more economical to use in manufacturing processes.

Enhanced Thermal Pad Composites Using Densely Aligned MgO Nanowires

“…Our analysis determined that the aligned composite with 4 vol% filler exhibited a similar or higher thermal conductivity than that of composites with a filler content of 10 vol% or higher. Additionally, the aligned composites with a similar filler content (approximately 12 vol%) were considerably superior (>100%) to previously reported MgO composites (Figure 4e) [31][32][33][34][35][36]. Therefore, the obtained results verified that the proposed technique of manufacturing TIM composites can be an outstanding method for obtaining high-performance thermal pads compared with previously reported MgO polymer composites.…”

Tribological and mechanical properties of nanofilled glass fiber reinforced composites and analyzing the tribological behavior using artificial neural networks

“…In a study conducted on MgO and Al 2 O 3 -filled polymer matrix composites, it was observed that MgO filler was more successful in enhancing wear resistance compared to Al 2 O 3 filler. 25 However, when the filler ratio was increased to 2.8 wt%, it was determined that the mass losses of all nanoparticle-filled composite materials were higher than that of the unfilled composite. Similar studies 26,27 have emphasized that exceeding a certain filler ratio in filled composite materials leads to agglomeration of filler particles within the composite structure, hindered homogeneous distribution, decreased interaction between matrix and filler, and consequently, negatively affects wear resistance.…”

“…This can be interpreted as the higher hardness of the MgO compound compared to CuO and its ability to form a better transfer film layer between the composite material and the abrasive ball, resulting in improved wear resistance of MgO‐filled composite. In a study conducted on MgO and Al 2 O 3 ‐filled polymer matrix composites, it was observed that MgO filler was more successful in enhancing wear resistance compared to Al 2 O 3 filler 25 . However, when the filler ratio was increased to 2.8 wt%, it was determined that the mass losses of all nanoparticle‐filled composite materials were higher than that of the unfilled composite.…”

Friction and Wear Behavior of Polyamide-6 Polymer and Mica and Glass Fiber Reinforced Polyamide-6 Polymer Composites against Poly-phenylene-Sulfide Polymer Composite

“…Bu zorluğun üstesinden gelmek için birçok araştırmacı takviye edici katkı malzemeleri kullanarak PA6 polimerinin özelliklerini geliştirme çalışmaları yapmıştır. Polimer malzemelerin gerek mekanik, fiziksel veya termal özelliklerini geliştirmek gerekse tribolojik özelliklerini iyileştirmek için matris bünyesine takviye, dolgu ve katkı malzemeleri ilave edilebilmektedir [1][2][3][4][5][6]. Bu malzemelerin içerisinde cam elyaf (CE), diğer elyaf türlerine göre düşük maliyetli olması, üstün kimyasal dirence ve yüksek yalıtım özelliklerine sahip olmaması ve ayrıca kolay şekillendirme ve temin edilebilirlik gibi özellikleriyle en çok kullanılan ve tercih edilen elyaf türüdür [4][5]7].…”