Rozdziały

Stały URI dla kolekcjihttp://hdl.handle.net/11652/4411

Przeglądaj

Filtry

20222

Ustawienia

Autorsearch.filters.applied.operator.equals: search.filters.author.Cherif, ChokriTematsearch.filters.applied.operator.equals: search.filters.subject.włókno węglowe z recyklingu

collection.search.results.head

Teraz wyświetlane 1 - 2 z 2
  • Pozycja
    Innovative thermally stablized low twist hybrid yarns from recycled carbon fibre for thermosplastic composites
    (Wydawnictwo Politechniki Łódzkiej, 2022) Hasan, Mir Mohammad Badrul; Khurshid, Muhammad Furqan; Abdkader, Anwar; Cherif, Chokri
    Hybrid yarns consisting of rCF and thermoplastic fibre offer a good potentials to improve mechanical properties of carbon fibre reinforced composites due to high fiber length, homogeneous mixing and high rCF content [1]. However, the twisting of the yarn in conventional spinning processes leads on one hand to the damage in rCF during spinning because of its high brittleness and sensitivity to shear forces. On the other hand, mechanical properties e.g. tensile and flexural strengths of composites decrease significantly with the increase of twist as a result of low fibre orientation [2]. On the contrary, the yarn strength and the stability of the spinning process are strongly dependent on the level of yarn twist. In our previous paper [3], the development of low twist hybrid yarns (75-30 T/m) consisting of rCF and polyamide 6 (PA6) fibre for high performance thermoplastic composites has been reported. However, hybrid yarns with low twist levels suffer from low spinning stability and poor yarn strength, which limits their further processablity in weaving or knitting processes. Therefore, the focus of this work is the development of a method to reduce yarn twist but still ensuring a stable spinning process, high yarn and composite strengths.
  • Pozycja
    Friction spun yarns with high RCF content for thermoset composites
    (Wydawnictwo Politechniki Łódzkiej, 2022) Hasan, Mir Mohammad Badrul; Huỳnh, Thị Anh Mỹ; Abdkader, Anwar; Cherif, Chokri
    Thermoplastic composites based on hybrid yarn structures consisting of recycled carbon fibre (rCF) and thermoplastic fibres (rCF content approx. 50 weight percentage) achieve high mechanical properties because of a long fiber length, homogeneous mixing and even yarn structure [1]. However, manufacturing of yarns with high rCF content (>90%) required for thermoset composites is still not realizable. Because of the special properties of rCF such as low shear strength, smooth fibre surface and high brittleness, high shortening (≥ 70%) in fibre length of rCF occurs during different processing steps of spinning [2]. The wide distribution of rCF fibre length arising especially during carding of pure rCF is regarded as very critical. In addition to this, lack of crimp in rCF leads to drafting error during drawing and spinning process. As a result, the quality of a yarn with high rCF content is still not acceptable. For this purpose, investigations are carried out in this work to enable gentle processing of rCF to produce slivers consisting solely of rCF. Furthermore, different core sheath yarn structures with rCF content (>90%) have been developed on a DREF-3000 friction spin machine for thermoset composites.