Sökning: "surface active"

Visar resultat 11 - 15 av 884 avhandlingar innehållade orden surface active.

1. 11. Surface chemical behaviour

   Författare :Marie Wickman; KTH; []
   Nyckelord :;

   Sammanfattning : The objective of the investigations included in this thesisis to show how the properties of alkyd resins, used as bindersin offset printing inks, affect the ink in terms of pigmentdispersion, emulsification of fountain solution, and inksetting.The interactions between alkyd resins and aqueous solutionshave been investigated by interfacial tension measurementsusing the pendant drop technique and by measurement of dropletsize using light diffraction. LÄS MER

3. 12. Tribology of stamping : the influence of designed steel sheet surface topography on friction

   Författare :Daniel Wiklund; Högskolan i Halmstad; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; steel sheet; tribology; surface topography; Metallurgical process and manufacturing engineering; Metallurgisk process- och produktionsteknik;

   Sammanfattning : Tribology is the science of friction, wear, and lubrication; the interaction of surfaces in relative motion. The tribological conditions in sheet metal forming influences the flow of material in forming operations, the strain distributions of sheet material, extent of wear, and thereby the quality of products. LÄS MER

4. 13. Vibrational Sum Frequency Spectroscopy Studies at the Air-Liquid Interface

   Författare :Eric Tyrode; Mark Rutland; Paul Davies; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Sum Frequency Generation; SFG; VSFS; surfactant; adsorption; water; surface structure; hydration; surface tension; fluorosurfactants; liquid-air interface; poly ethylene oxide surfactants; surface molecular orientation; acetic acid.; Surface and colloid chemistry; Yt- och kolloidkemi;

   Sammanfattning : In this thesis the structure and hydration of small organic and amphipilic compounds adsorbed at the air-liquid interface, have been studied using the nonlinear optical technique Vibrational Sum Frequency Spectroscopy (VSFS). The second order nature of the sum frequency process makes this technique particularly surface sensitive and very suitable for interfacial studies, as molecules at the surface can be distinguished even in the presence of a vast excess of the same molecules in the bulk. LÄS MER

5. 14. Applications of active materials

   Författare :Erik Edqvist; Greger Thornell; Bengt Lundberg; Edwin Jäger; Uppsala universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Energy efficient; microsystem; resonating cantilevers; microactuators; P VDF-TrFE ; surface mounting assembly; multi layers; flexible printed circuit board; conveyer; three legged; Materials science; Teknisk materialvetenskap; materialvetenskap; Materials Science;

   Sammanfattning : Energy efficiency is a vital key component when designing and miniaturizing self sustained microsystems. The smaller the system, the smaller is the possibility to store enough stored energy for a long and continuous operational time. LÄS MER

7. 15. Active insulation : possibilities of utilizing free charges in air

   Författare :Mats Sjöberg; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; capacitively coupled discharge; charge accumulation; breakdown mechanism; dielectric covered structures; electric field homogenization; active insulation; dynamic charging; microdischarge; dielectric barrier discharge; dielectric breakdown strength; electric field reduction; space charge; air gaps; surface charge;

   Sammanfattning : .... LÄS MER