Search for dissertations about: "dry bulk"

Showing result 1 - 5 of 45 swedish dissertations containing the words dry bulk.

2. 1. Synthesis and Characterization of Sec-Packings Based on Trimethylolpropane Trimethacrylate

   Author : Andrea Schmid; Chalmers tekniska högskola; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; bulk polymerization; N; hydrophilic gels; separation; methyl methacrylate; hydrophobic networks; acrylamide; porous networks; Suspension; N -methylene-bis-acrylamide; chemically crosslinked networks; dry gels; polysaccharide standards; distilled water; copolymerization; trimethylolpropane trimethacrylate;

   Abstract : Suspension and bulk polymerization of trimethylolpropane trimethacrylate (TRIM) and copolymerization of TRIM with methyl methacrylate (MMA) resulted in porous, hydrophobic, and chemically crosslinked networks. Copolymerization of TRIM with acrylamide (AA) and with N,N'-methylene-bis-acrylamide (bis-AA) resulted in hydrophilic gels. READ MORE

4. 2. Comparative Study of Chemical Additives Effects on Dry Grinding Performance

   Author : Vitalis Chipakwe; Saeed Chehreh Chelgani; Jan Rosenkranz; Tommy Karlkvist; Kirsten Claire Corin; Luleå tekniska universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Energy; Grinding aid; Flowability; Dry grinding; FT4 Powder Rheometer; Surface properties; Mineral Processing; Mineralteknik;

   Abstract : The application of chemical additives, known as grinding aids (GA), dates back to 1930 in the cement industry. As opposed to the cement industry, where the use of GAs is on the final processing step, it could be one of the first process steps in ore beneficiation. READ MORE

5. 3. Study of Paper Dry Strength Additives on Cellulose Fibres

   Author : Mengxiao Zhao; Torbjörn Pettersson; Lars Wågberg; Leif Robertsén; Tekla Tammelin; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Paper dry strength additives; adsorption of polymer; polyelectrolyte; birch fibres; model cellulose surface; cellulose beads; filaments; light-weight paper board; polyacrylamide; cationic starch; Torrstyrkekemikalier; polymeradsorption; polyelektrolyter; cellulosafibrer; modellcellulosaytor; cellulosakulor; lättviktsliner; polyakrylamid; katjonstärkelse; Fiber- och polymervetenskap; Fibre and Polymer Science;

   Abstract : Paper packaging is commonly found in the form of paper and cardboard boxes, but recently paper packing is being used in food packaging, trays, beverage packaging and even paper straws, among others. Paper strength additives have been developed to increase the efficiency of the joint strength and the joint areas and potentially maintain bulk in paper products. READ MORE

6. 4. Modification of fluff pulp fibres: Cross-linking and alkali extraction

   Author : Kristoffer Lund; Chalmers tekniska högskola; []
   Keywords : LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; fibre network; dry defibration; network strength; fluff pulp; Absorption; cross-linking; alkali extraction; kraft pulp;

   Abstract : Fluff pulp has been one of the key components of hygienic products, such as diapers, for many years. Fluff pulp is dry defibrated and air-laid into the absorption core of diapers. The introduction of superabsorbent polymers (SAPs) in the 1980s decreased the dependence on fluff pulp, as the SAPs became the main absorbing material. READ MORE

7. 5. An Experimental Study on Micro-Hydrodynamics of Evaporating/Boiling Liquid Film

   Author : Shengjie Gong; Ma Weimin; Horst-Michael Prasser; KTH; []
   Keywords : liquid film; critical thickness; boiling; critical heat flux; rupture; dry spot; confocal optical sensor; SRA - Energy; SRA - Energi;

   Abstract : Study of liquid film dynamics is of significant importance to the understanding and control of various industrial processes that involve spray cooling (condensation), heating (boiling), coating, cleaning and lubrication. For instance, the critical heat flux (CHF) of boiling heat transfer is one of the key parameters ensuring the efficiency and safety of nuclear power plants under both operational and accident conditions, which occurs as the liquid layers (microlayer and macrolayer) near the heater wall lose their integrity. READ MORE