20.500.12556/RUL-100610 Izolacijske plošče iz naravnih vlaken insulating boards made of natural fibers V nalogi smo ugotavljali toplotne izolativne lastnosti različnih naravnih materialov v obliki vlaken. V raziskavi smo preučevali celulozne kosmiče in konopljo, ki za uporabo veljata kot najbolj primerna naravna materiala. Konopljo smo razčlenili na dolga vlakna, mleta vlakna in pezdir. Zanimalo nas je, kako različni naravni materiali z različno morfologijo osnovnih delcev in različno gostoto vplivajo na toplotno prevodnost. Za raziskavo razlik v izolativnih lastnostih smo materiale izpostavili različnim klimatskim pogojem, ter preučili vpliv deleža lepila in različnih dodatkov na izolativne lastnosti. Ugotovili smo, da se uporabljeni materiali v izolativnih lastnostih razlikujejo. Razen pri dolgih vlaknih so materiali z višjo gostoto imeli slabše izolacijske lastnosti. Ugotovili smo tudi, da se materialom z višjo gostoto koeficient toplotne prevodnosti spreminja počasneje, če so izpostavljeni vlažnim klimatskim pogojem. Slabše izolacijske lastnosti smo ugotovili tudi pri večjih deležih lepila. Pri dodanem silikagelu smo pri spremembi vlažnosti zaznali obarvanje, kar nakazuje, da bi bil primeren kazalnik prevelike vlage v izolaciji. The purpose of the investigation was to study insulation properties of different fibre shaped natural materials. For study celluloze flakes and hemp was used, which are the most effective natural materials. Hemp was divided in to long fibres, grind fibers and wood-like core fibre. We investigated differences between type of material, board densities and their impact on coefficient of thermal conductivity. For investigating the differences in insulation properties, we expose materials to different climat conditions. Influence of resin share and different additives on insulation properties was also investigated. We determined the differences in insulation properties related to type of material used. With the exeption of long fibres, the materials with the higher density had higher thermal conductivity. We also found out, that the materials with the higher density had greater effect on thermal conductivity when exposed to high moisture environment. Thermal conductivity increased with increasing resin share. The change of color was noticed at the silica gel, when the climat conditions changed. That means that it is good for monitoring the change of moisture in insulation. naravna vlakna/izolacija/vlažnost/koeficient toplotne prevodnosti/konoplja natural fibers/insulation/moisture content/ coefficient of thermal conductivity /hemp true false false [A. Miklič] Slovenski jezik Angleški jezik Magistrsko delo/naloga 2018-03-31 07:46:25 2018-03-31 07:46:26 2022-08-14 03:41:14 0000-00-00 00:00:00 2018 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 630*862 151096 2893961 2563.pdf 2563.pdf 1 827879E23291071CB4C50C575D3A63E9 ef9cc493358dfb7a89e41696b34a384a2b2038529874c01efe3f9fb9279327f9 c17ac9f1-a1b4-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=110386 Biotehniška fakulteta 0 0 0