Sökning: "dispersing agent"

Visar resultat 1 - 5 av 6 avhandlingar innehållade orden dispersing agent.

1. 1. Interactions between non-polar surfaces in water: Fokus on talc, pitch and surface roughness effects

   Författare :Viveca Wallqvist; Per Claesson; Janne Laine; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Talc; surface forces; capillary attraction; hydrophobic interaction; pitch control; wetting agent; dispersing agent; adsorption; imbibition; absorption; permeation; atomic force microscopy; colloidal probe; Hamaker constant; surface roughness; nanostructure.; Talk; kapillärattraktion; ytkrafter; hydrofob växelverkan; hartskontroll; vätningsmedel; dispergeringsmedel; adsorption; uppsugning; absorption; permeabilitet; atomkraftsmikroskopi; kolloidal partikel; Hamakerkonstant; ytråhet; nanostrukturerad yta.; Surface and colloid chemistry; Yt- och kolloidkemi; Physical chemistry; Fysikalisk kemi; Chemistry; Kemi;

   Sammanfattning : The aim of this thesis work was to gain understanding of the interactions between talc mineral and surfaces, liquids and chemicals relevant for industrial applications, such as pulp and paper. Talc is used in the pulp and paper industry as a filler pigment, in control of pitch (lipophilic extractives) deposits and as a coating pigment. LÄS MER

3. 2. Emulsification of Alkyl Ketene Dimer (AKD) -characterization of dispersions and emulsifiers

   Författare :Kristina Mohlin; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; hydrolysis; droplet size; hydrophobizing agent; dispersion; surfactant; AKD; emulsification; viscosity; surface tension; polymer; phase behavior; Alkyl Ketene Dimer;

   Sammanfattning : Alkyl Ketene Dimer (AKD) is a commonly used hydrophobizing agent in the paper industry, introducing capillary absorption barriers for polar liquids, which makes the paper more resistant to liquid penetration. Since AKD is a so-called internal sizing agent it is usually added in the form of a water-borne dispersion. LÄS MER

4. 3. Improving properties of poly(lactic acid) biopolymer for use in food packaging

   Författare :Mitul Kumar Patel; Kristiina Oksman; Mohini Sain; Marc Delgado Aguire; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; biopolymer; poly lactic acid ; chitin nanocrystals; barrier properties; liquid assisted extrusion; Trä och bionanokompositer; Wood and Bionanocomposites;

   Sammanfattning : The petroleum-based plastics are widely used for food packaging applications because of their low cost, easy processability, and tunable properties to meet the specific needs of food packaging. However, these polymers are non-biodegradable, leading to a substantial amount of plastic waste in both land and marine ecosystems. LÄS MER

5. 4. Buying Conservation : Financial Incentives for Tropical Forest Conservation in the Ecuadorian Amazon

   Författare :Torsten Krause; LUCSUS; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Socio Bosque; Forest Conservation; Incentive-based instruments; Ecuador; Indigenous Communities;

   Sammanfattning : Market-based instruments have become a widely used approach to motivate landowners to conserve forests instead of clearing them. However, such market-based instruments are increasingly criticized for their simplistic view on complex environmental, social and economic issues; for their ethical stance; and for creating exchange value for essential ecosystems services, which potentially perpetuates a flawed economic system. LÄS MER

7. 5. Protein-Based Adhesives for Particleboards

   Författare :Sara Khosravi; Mats Johansson; A. A Broekhuis; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Kemi; Chemistry;

   Sammanfattning : The main objective of this study was to elucidate the possibilities to use wheat gluten (WG) as a binder for particleboards, as well as soy protein isolate (SPI). The focus was on the effect of the adhesive formulation and the processing conditions, while the press parameters were kept constant. LÄS MER