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Cellulose-fiber-bas...
Cellulose-fiber-based thermal insulation materials with fungal resistance, improved water resistance and reaction-to-fire properties
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- Zheng, Chao, 1988- (author)
- KTH,Träkemi och massateknologi
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- Ek, Monica, Professor (thesis advisor)
- KTH,Träkemi och massateknologi
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- Li, Dongfang, Doctor (thesis advisor)
- KTH,Träkemi och massateknologi
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- Wågberg, Lars, Professor (opponent)
- KTH,Fiberteknologi,Wallenberg Wood Science Center (WWSC)
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- Björk, Folke, Professor (opponent)
- KTH,Byggnadsmaterial,Byggnadsteknik
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(creator_code:org_t)
- ISBN 9789177293309
- Stockholm : KTH Royal Institute of Technology, 2017
- English 37 s.
- Related links:
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https://kth.diva-por... (primary) (Raw object)
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https://urn.kb.se/re...
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Abstract
Subject headings
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- Thermal insulation materials made from natural fibrous materials, such as cellulose fibers, have advantages over others from a sustainability point of view. However, cellulosic materials are generally prone to mold and absorb moisture, and these have negative effects on the insulation properties, the durability of insulation materials, and interior air quality. In this thesis, cellulose-fiber-based insulation foams were prepared from bleached chemithermomechanical softwood pulp, and these foams showed promising thermal insulation properties and fungal resistance. Hydrophobic extractives were isolated from birch (Betula verrucosa) outer bark and used to improve the water resistance of the foams, which were impregnated in solutions of extractives and then dried. The modified foams showed greater water resistance, and the modification had no negative effects on the thermal insulation, fungal resistance, and compressive strength of the foams.Another potential problem with low density cellulosic thermal insulation materials is their poor reaction-to-fire properties. Cellulose-fiber-based insulation foams were prepared from formulations containing bleached chemithermomechanical softwood pulp and commercial fire retardants to improve the reaction of the foams to fire. Single-flame source test results showed that the foams containing 20% expandable graphite (20% EG) or 25% synergetic (25% SY) fire retardant had significantly improved reaction-to-fire properties and passed class E, which reflected that they can resist a small flame attack without substantial flame spreading for a short period according to EN 13501-1. Compared with the reference without any fire retardant, the peak heat release rate (Peak-HRR) of the 20% EG and 25% SY decreased by 62% and 39% respectively when the samples were subjected to a radiance heat flow of 25 kW m-2 in a Cone Calorimeter.The thesis demonstrates that it is possible to produce cellulose-fiber-based insulation materials with improved properties in terms of fungal, improved water resistance and reaction-to-fire properties.
Subject headings
- LANTBRUKSVETENSKAPER -- Lantbruksvetenskap, skogsbruk och fiske -- Trävetenskap (hsv//swe)
- AGRICULTURAL SCIENCES -- Agriculture, Forestry and Fisheries -- Wood Science (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Pappers-, massa- och fiberteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Paper, Pulp and Fiber Technology (hsv//eng)
Keyword
- biorefinery
- birch bark
- cellulose
- reaction-to-fire properties
- fungal resistance
- thermal insulation
- water resistance
- Fiber- och polymervetenskap
- Fibre and Polymer Science
Publication and Content Type
- vet (subject category)
- lic (subject category)
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- By the author/editor
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Zheng, Chao, 198 ...
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Ek, Monica, Prof ...
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Li, Dongfang, Do ...
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Wågberg, Lars, P ...
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Björk, Folke, Pr ...
- About the subject
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- AGRICULTURAL SCIENCES
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AGRICULTURAL SCI ...
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and Agriculture Fore ...
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and Wood Science
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- ENGINEERING AND TECHNOLOGY
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ENGINEERING AND ...
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and Materials Engine ...
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and Paper Pulp and F ...
- By the university
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Royal Institute of Technology