Essays about: "water and oil repellency"

Found 3 essays containing the words water and oil repellency.

1. 1. Effects of Immiscible Compressor Oil in a Flooded PSHE Evaporator : A Visual Study Approach

   University essay from KTH/Energiteknik

   Author : Joel Blomfelt; [2022]
   Keywords : ;

   Abstract : This paper deals with heat transfer in plate evaporators, with a focus on the effects caused by carried-over compressor oil ending up in the heat exchanger. A common standpoint in literature regarding the effect of immiscible oil contamination, in for example an ammonia PHE evaporator, is that the oil can accumulate as a layer on the plate surface causing an additional thermal conduction resistance. READ MORE

3. 2. Greener Water Repellency? Feasible alternatives to fluoro chemicals for DWOR treatments on textiles

   University essay from Högskolan i Borås/Institutionen Textilhögskolan

   Author : Denize Åkerblom; Erik Göranzon; [2014]
   Keywords : Water and oil repellent; treatments; water and oil repellency; DWR; DWOR; perfluorinated compounds; PFCs; perfluorooctanoic acid; PFOA; perfluorooctane sulfonates; PFOS; dendrimers; organic silicon; hydrocarbon; hydrocarbon; aliphatic polyurethane; textiles; outdoor clothing; performance; UV-radiation; Martindale; washing;

   Abstract : BACKGROUND: Perfluorinated compounds (PFCs) have been used as durable water and oil repellent treatments in clothing for more than 50 years. The reason for its popularity is related to the chemical structure, which also makes these compounds persistent in the environment. READ MORE

4. 3. Alternatives to Conventional Fluorocarbon based Soil Resistant Treatment for Automotive Interior Textiles : An Evaluative Study

   University essay from Högskolan i Borås/Institutionen Textilhögskolan

   Author : Behnaz Baghaei; Faisal Mehmood; [2011]
   Keywords : soil resistant; cleanability; pfos-free; pfoa-free; fluorochemicals fc ; water-oil-soil repellency;

   Abstract : During the last two decades, the applications of fluorocarbon based chemicals to provide soil resistant or soil release properties for automotive interior and upholstery have increased tremendously. But, recent studies showed that the soil resistant treatment based on fluorochemicals has detrimental effects on the environment as well as on humans due to the presence of perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA) content. READ MORE