magistrsko delo
Aleks Miklič (Author), Željko Gorišek (Reviewer), Sergej Medved (Mentor)

Abstract

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.

Keywords

naravna vlakna;izolacija;vlažnost;koeficient toplotne prevodnosti;konoplja;

Data

Language: Slovenian
Year of publishing:
Typology: 2.09 - Master's Thesis
Organization: UL BF - Biotechnical Faculty
Publisher: [A. Miklič]
UDC: 630*862
COBISS: 2893961 Link will open in a new window
Views: 852
Downloads: 467
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Other data

Secondary language: English
Secondary title: Insulating boards made of natural fibers
Secondary abstract: The purpose of the investigation was to study insulation properties of different fibre shaped natural materials. For study cellulose flakes and hemp was used, which are the most effective natural materials. Hemp was divided in to long fibres, grind fibres 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 climate 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 colour was noticed at the silica gel, when the climate conditions changed. That means that it is good for monitoring the change of moisture in insulation.
Secondary keywords: natural fibers;insulation;moisture content;coefficient of thermal conductivity;hemp;
Type (COBISS): Master's thesis/paper
Study programme: 0
Embargo end date (OpenAIRE): 1970-01-01
Thesis comment: Univ. v Ljubljani, Biotehniška fak., Oddelek za lesarstvo
Pages: VIII, 29 f.
ID: 10920814