Sökning: "Environmental lubricants"

Visar resultat 1 - 5 av 18 avhandlingar innehållade orden Environmental lubricants.

  1. 1. Levels and sources of organophosphorus flame retardants and plasticizers in indoor and outdoor environments

    Författare :Anneli Marklund; Peter Haglund; Barbro Andersson; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; organophosphate esters; OPs; human exposure; air; dust; sewage treatment plants; sludge; oil; snow; deposition; flame retardants; plasticizers; analysis; TCEP; TPP; TCPP; TBP; TBEP; Environmental chemistry; Miljökemi;

    Sammanfattning : Global consumption of organophosphate esters (OPs), which are used as flame retardants and plasticizers, is rapidly increasing. Their use as additives in diverse applications poses a risk as they may be emitted from the products they are added to and be further transported in the environment. LÄS MER

  3. 2. Environmentally adapted lubricants : properties and performance

    Författare :Anders Pettersson; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Machine Elements; Maskinelement;

    Sammanfattning : The lubricants of the future have to be more environmentally adapted, show a higher level of performance, and give a lower total life cycle cost (LCC) than the lubricants that are used today. One way to be able to produce, choose and formulate these lubricants is to have good knowledge about the properties of the base fluids and their additive response. LÄS MER

  4. 3. A study on the possibilities of improving the environment by the use of less detrimental lubricants in cold rolling

    Författare :Mohammed Tahir; KTH; []
    Nyckelord :Environmental lubricants; Lubrication; Cold rolling; Friction; Forward slip; Surface roughness; Surface temperature; Aluminium strip;

    Sammanfattning : .... LÄS MER

  5. 4. Boron compounds as additives to lubricants : synthesis, characterization and tribological optimization

    Författare :Faiz Ullah Shah; Luleå tekniska universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Chemistry of Interfaces; Gränsytors kemi;

    Sammanfattning : Developing new technological solutions, such as use of lightweight materials, less harmful fuels, controlled fuel combustion processes or more efficient exhaust gas after-treatment, are possible ways to reduce the environmental impact of machines. Both the reduction of wear and the friction control are key issues for decreasing of energy losses, improving efficiency and increasing of the life-span of an engine. LÄS MER

  7. 5. Friction in highly pressurized lubricants and its relation to thermo-physical properties

    Författare :Bert-Olof Åhrström; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Maskinelement; Machine Elements;

    Sammanfattning : The objective of this work was to increase the understanding of which lubricant properties control transient friction, and during what environmental conditions friction is minimized. The experiments have been conducted during conditions relevant to an elastohydrodynamic contact, with pressures extending up to 2. LÄS MER