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Hierarchical wood cellulose fiber/epoxy biocomposites : Materials design of fiber porosity and nanostructure
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- Ansari, Farhan (author)
- KTH,Fiber- och polymerteknologi,VinnExcellens Centrum BiMaC Innovation,KTH Royal Institute of Technology, Sweden
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- Sjöstedt, Anna (author)
- KTH,Fiber- och polymerteknologi,Wallenberg Wood Science Center,KTH Royal Institute of Technology, Sweden
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- Larsson, Per Tomas (author)
- RISE,KTH,Wallenberg Wood Science Center,Innventia,KTH Royal Institute of Technology, Sweden
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- (creator_code:org_t)
- Elsevier BV, 2015
- 2015
- English.
- In: Composites. Part A, Applied science and manufacturing. - : Elsevier BV. - 1359-835X .- 1878-5840. ; 74, s. 60-68
- Journal article (peer-reviewed)
Abstract
Subject headings
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- Delignified chemical wood pulp fibers can be designed to have a controlled structure of cellulose fibril aggregates to serve as porous templates in biocomposites with unique properties. The potential of these fibers as reinforcement for an epoxy matrix (EP) was investigated in this work. Networks of porous wood fibers were impregnated with monomeric epoxy and cured. Microscopy images from ultramicrotomed cross sections and tensile fractured surfaces were used to study the distribution of matrix inside and around the fibers - at two different length scales. Mechanical characterization at different relative humidity showed much improved mechanical properties of biocomposites based on epoxy-impregnated fibers and they were rather insensitive to surrounding humidity. Furthermore, the mechanical properties of cellulose-fiber biocomposites were compared with those of cellulose-nanofibril (CNF) composites; strong similarities were found between the two materials. The reasons for this, some limitations and the role of specific surface area of the fiber are discussed.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Pappers-, massa- och fiberteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Paper, Pulp and Fiber Technology (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Kompositmaterial och -teknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Composite Science and Engineering (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Nanoteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Nano-technology (hsv//eng)
Keyword
- A. Nano-structures
- B. Interface
- D. Fractography
- Moisture stability
- Cellulose
- Characterization
- Composite materials
- Fibers
- Fracture mechanics
- Mechanical properties
- Nanostructures
- Pulp materials
- Textile fibers
- Wood products
- Cellulose fibrils
- Controlled structures
- Different length scale
- Fractured surfaces
- Mechanical characterizations
- Microscopy images
- Wood cellulose fibers
- Wood
- Moisture
- Pulps
- Stability
- Surfaces
Publication and Content Type
- ref (subject category)
- art (subject category)
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