Vacuum Infusion of Nanocellulose Networks of Different Porosity

↓ Direkt till sidans innehåll
↓ Direkt till sidans sekundära innehåll (sidomenyn)

Search: WFRF:(Lundström Staffan) > Vacuum Infusion of ...

Details
MARC

Aitomäki, YvonneLuleå tekniska universitet,Materialvetenskap (author)

Vacuum Infusion of Nanocellulose Networks of Different Porosity

Article/chapterEnglish2015

Publisher, publication year, extent ...

ICCM,2015
electronicrdacarrier

Numbers

LIBRIS-ID:oai:DiVA.org:ltu-27554
https://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-27554URI

Supplementary language notes

Language:English
Summary in:English

Part of subdatabase

SwePubSwePub

Classification

Subject category:ref swepub-contenttype
Subject category:kon swepub-publicationtype

Notes

Godkänd; 2015; 20151218 (aitomaki)
Cellulose nanofibres (CNF) have shown good potential as sustainable, biobased reinforcing materials in polymer composites. Addressing issues around the processing of these composites is an important part of establishing their use in different applications. Here, CNF networks of different porosity are made from nanofibrillated hardwood kraft pulp with the aim of increasing the impregnation of the CNF networks and to allow vacuum infusion to be used. Two different vacuum infusion strategies: in-plane and out of plane were used to infuse the CNF networks with a low viscosity epoxy. The permeability, morphology and mechanical properties of the dry networks and the resulting nanocomposites were investigated and compared to a micro-fibre based network. Using the out-of-plane permeability measurements and Darcy’s law, the fill-time was calculated and showed that the CNF network with 40% porosity had the lowest fill-time when an out-of-plane impregnation strategy is used. However this exceeded the gel-time of the epoxy system. In experiments, the resin reached the other side of the network but low transparency indicated that wetting was poor. The dry CNF preforms showed a very strong dependence on the porosity with both modulus and strength increasing rapidly at low porosity. Interestingly, the composite based on the 60% porosity network showed good wetting particularly with the in-plane infusion strategy, exhibiting a much more brittle fracture and a high yield strength. This shows that in CNF composites produced by VI, lowering the fibre volume content of the CNF composites gives better impregnation resulting in a lower ultimate strength but higher yield strength and no loss in modulus.

Subject headings and genre

TEKNIK OCH TEKNOLOGIER Industriell bioteknik Biomaterial hsv//swe
ENGINEERING AND TECHNOLOGY Industrial Biotechnology Bio Materials hsv//eng
TEKNIK OCH TEKNOLOGIER Maskinteknik Strömningsmekanik och akustik hsv//swe
ENGINEERING AND TECHNOLOGY Mechanical Engineering Fluid Mechanics and Acoustics hsv//eng
cellulose fibers
permeability characterization
vacuum infusion
Trä och bionanokompositer
Wood and Bionanocomposites
Strömningslära
Fluid Mechanics

Added entries (persons, corporate bodies, meetings, titles ...)

Moreno, SergioLuleå tekniska universitet,Materialvetenskap(Swepub:ltu)sermor (author)
Lundström, StaffanLuleå tekniska universitet,Strömningslära och experimentell mekanik(Swepub:ltu)stlu (author)
Oksman, KristiinaLuleå tekniska universitet,Materialvetenskap(Swepub:ltu)krioks (author)
Luleå tekniska universitetMaterialvetenskap (creator_code:org_t)

Related titles

In:20th International Conference on Composite Materials: ICCM

Internet link

To the university's database

Find more in SwePub

By the author/editor: Aitomäki, Yvonne; Moreno, Sergio; Lundström, Staff ...; Oksman, Kristiin ...

About the subject

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Industrial Biote ...; and Bio Materials

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Mechanical Engin ...; and Fluid Mechanics ...

Articles in the publication: 20th Internation ...

By the university: Luleå University of Technology

Search outside SwePub

Extend your search to:: Google; Google Book Search; Google Scholar

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

LIBRIS.kb.se