Sökning: "foams"

Visar resultat 1 - 5 av 91 avhandlingar innehållade ordet foams.

1. 1. Freeze-Dried Wheat Gluten-Based Foams

   Författare :Thomas Blomfeldt; Mikael Hedenqvist; Delcour Jan; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Foams; Wheat gluten; Glutenin; Gliadin; Renewable; Freeze-drying; Pore structure; Baceterial cellulose; Glycerol; Mechanical properties; Thermal conductivity; Combustion properties;

   Sammanfattning : This thesis presents wheat gluten foams as an alternative to the available commercialfoams. Polymeric foams, like all plastics, are mostly made from petroleum, and this isaffecting the environment negatively with the emission of greenhouse gases and generation oflandfills. LÄS MER

3. 2. Modeling of foams for impact simulations

   Författare :Mats L Landervik; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Theory of Porous Media; Shell theory.; Constitutive modeling; Multiscale Analysis; Foams; Computational Homogenization;

   Sammanfattning : Stimulated by the strong drive in the automotive industry to reduce energy consumption,and, linked to that, the need to reduce weight, this thesis concerns modeling of foams forimpact simulations. To start with, a continuum hyperelasto-viscoplastic model is developedwithin the framework of Theory of Porous Media. LÄS MER

4. 3. Thermal Conductivity of Hygroscopic Foams Based on Cellulose Nanomaterials

   Författare :Varvara Apostolopoulou-Kalkavoura; Lennart Bergström; Tatiana Budtova; Stockholms universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; thermal conductivity; cellulose nanomaterials; foams; hygroscopic; super-insulating; phonon scattering; moisture uptake; heat transport; Materials Chemistry; materialkemi;

   Sammanfattning : Biobased super-insulating materials could mitigate climate change by minimizing the use of petroleum-based materials, creating artificial carbon sinks and minimizing the energy needed to maintain pleasant interior conditions. Cellulose nanomaterials (CNM) produced from abundantly available cellulose sources constitute versatile, highly anisotropic raw materials with tunable surface chemistry and high strength. LÄS MER

5. 4. Colloidal Processing and Alignment of Wood-Based Dispersions and Hybrid Functional Foams

   Författare :Seyed Ehsan Hadi; Lennart Bergström; Daniel Söderberg; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; wood-based nanomaterials; process-structure-property relationships; nanocellulose; lignocellulose nanofibers; rheology; small-angle X-ray scattering; lignin; tannic acid; unidirectional ice-templating; foams; aerogels; sustainability; träbaserade nanomaterial; process-struktur-egenskapsrelationer; nanocellulosa; lignocellulosananofibrer; reologi; småvinkelröntgenstrålning; lignin; garvsyra; riktad isstrukturering; skum; aerogeler; hållbarhet; materialkemi; Materials Chemistry;

   Sammanfattning : This thesis presents novel methods and approaches for designing, preparing/fabricating, and characterizing wood-based nanomaterials. It investigates how modifications in structure, process variables, and composition can enhance functional properties. LÄS MER

7. 5. Assembly and alignment in cellulose nanomaterial-based composite dispersions and thermally insulating foams

   Författare :Pierre Munier; Lennart Bergström; Aji Mathew; Steve Eichhorn; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; cellulose nanomaterials; composites; assembly; alignment; x-ray scattering; foams; thermal insulation; mechanical strengthening; Materials Chemistry; materialkemi;

   Sammanfattning : Research on nanoparticles extracted from renewable and highly available sources is motivated by both the development of functional nanomaterials and the drive to replace widely used materials based on fossil resources. In particular, cellulose, in the form of cellulose nanomaterials (CNM), has attracted increased attention for the development of sustainable and high performance products, thanks to properties that include high specific mechanical strength, chemical versatility and anisotropic thermal conductivity. LÄS MER