Molybdenum disulphide—A traditional external lubricant that shows interesting interphase properties in pulp-based composites
Artikel i vetenskaplig tidskrift, 2021

Compression molded composites were prepared through a water-assisted mixing of an aqueous suspension of poly(ethylene-co-acrylic acid), additive, and pulp fibers [thermomechanical pulp (TMP) or dissolving pulp (DP)]. The lubricating additives used were magnesium stearate (MgSt) and molybdenum disulphide (MoS2). The composite materials had dry pulp contents ranging from 30 to 70 wt% and 5 wt% additive relative to the weight of the pulp. The adsorption of the additives onto the fibers was confirmed by scanning electron microscopy and energy dispersive X-ray analysis. DMA showed that MgSt and MoS2 gave similar interphase properties for the TMP samples at all loading contents, but the combination of MgSt and MoS2 improved the overall properties of the DP-based composites. The tensile modulus, at 70 wt% fiber content (TMP or DP), increased compared to the matrix by a factor of 6.3 and 8.1, without lubricants, and by a factor of 8 and 10.7, with lubricants, respectively. The increase in melt viscosity observed for the lubricated samples was greater for the TMP-based samples containing MoS2. At a lubricant content of 5 wt%, in 30 wt% TMP, the MoS2 behaved as both a lubricant and compatibilizer.


thermomechanical pulp

molybdenum disulphide

mechanical properties


Seyedehsan Hosseini

Wallenberg Wood Science Center (WWSC)

Chalmers, Kemi och kemiteknik, Kemi och biokemi

Abhijit Venkatesh

Chalmers, Industri- och materialvetenskap, Konstruktionsmaterial

Antal Boldizar

Chalmers, Industri- och materialvetenskap, Konstruktionsmaterial

Gunnar Westman

Chalmers, Kemi och kemiteknik, Kemi och biokemi

Wallenberg Wood Science Center (WWSC)

Polymer Composites

0272-8397 (ISSN) 1548-0569 (eISSN)

Vol. 42 9 4884-4896



Pappers-, massa- och fiberteknik




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