Sökning: "fiber analysis"

Visar resultat 21 - 25 av 329 avhandlingar innehållade orden fiber analysis.

1. 21. New Mass Spectrometric Methods for Structure Analysis of Carboxymethyl Cellulose

   Författare :Jonas Enebro; Sigbritt Karlsson; Dane Momcilovic; Ulf Germgård; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; carboxymethyl cellulose; substituent distribution; rheology; enzyme hydrolysis; cellulase; permethylation; liquid chromatography; MALDI; ESI; mass spectrometry; Polymer chemistry; Polymerkemi;

   Sammanfattning : Carboxymethyl cellulose (CMC) is a cellulose derivative, made from cellulose by introduction of carboxymethyl groups along the molecules. The properties of CMC are affected by several parameters where the molar mass and molar mass distribution, degree of substitution (DS) and the distribution pattern along, and between, the cellulose molecules are the most prominent. LÄS MER

3. 22. Modelling Fiber Network Materials:Micromechanics, Constitutive Behaviour and AI

   Författare :Mossab Alzweighi; Artem Kulachenko; Rami Mansour; Sören Östlund; Manfred Ulz; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Solid Mechanics; Hållfasthetslära;

   Sammanfattning : This thesis focuses on understanding the mechanical behavior of fiber-based materials by utilizing various modeling approaches. Particular emphasis is placed on their structural variability, anisotropic properties, and damage behavior. LÄS MER

4. 23. Increased Functionality of Optical Fibers for Life-Science Applications

   Författare :Azizahalhakim Sudirman; Gunnar Björk; Gilberto Brambilla; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Fiberoptics; microstructured fiber; fiber - based optofluidics; laser ablation; microfluidics; reflectometry; fluorescence detection; fiber - based spectroscopy; Fysik; Physics;

   Sammanfattning : The objective of this thesis work is to increase the functionality of optical fibers for possible applications in life-sciences. Optical fibers are a promising technology for use in biology and medicine. They are low-costwaveguides, flexible and have a small cross-section. They can guide high-power light with low loss in a micrometer core-size. LÄS MER

5. 24. A Framework for Fatigue Analysis of Carbon Fiber Reinforced Polymer Structures

   Författare :Sara Eliasson; Zuheir Barsoum; Per Wennhage; Kim Branner; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Heavy-duty vehicles; Fatigue; Carbon fiber reinforced polymer; Multi-scale modeling; Probabilistic modeling; Tunga fordon; Utmattning; Kolfiberkomposit; Probabilistisk modellering; Farkostteknik; Vehicle and Maritime Engineering;

   Sammanfattning : Our society depends on functional road communication, and Heavy Duty Vehicles (HDVs) offer convenient and limitless possibilities of transport and services. However, HDVs account for a quarter of the European Union's CO2 road emissions. There is a substantial need to reduce the CO2 emissions of HDVs to ensure a low negative environmental impact. LÄS MER

7. 25. Modification of Paper into Conductive Substrate for Electronic Functions : Deposition, Characterization and Demonstration

   Författare :Elson Montibon; Magnus Lestelius; Lars Järnström; Jouko Peltonen; Karlstads universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Ionic paper; electroconductive paper; flexible electronics; conducting polymer; ionic liquids; fiber network; Cellulose and paper engineering; Cellulosa- och pappersteknik; Chemical Engineering; Kemiteknik;

   Sammanfattning : The thesis investigates the modification of paper into an ion- and electron-conductive material, and as a renewable material for electronic device. The study stretches from investigating the interaction between the cellulosic materials and the conducting polymer to demonstrating the performance of the conductive paper by printing the electronic structure on the surface of the conductive paper. LÄS MER