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Title: Cellulose nanofibre–poly(lactic acid) microcellular foams exhibiting high tensile toughness
Authors: Dlouhá, Jana
Suryanegara, Lisman
Yano, Hiroyuki  kyouindb  KAKEN_id
Keywords: Polylactic acid
Cellulose nanofibres
Microcellular nanocomposites
Mechanical properties
Issue Date: Dec-2014
Publisher: Elsevier Ltd.
Journal title: Reactive and Functional Polymers
Volume: 85
Start page: 201
End page: 207
Abstract: We report here the morphology and tensile properties of polylactic acid–cellulose nanofibre (PLA–CNF) microcellular nanocomposites. Two types of CNF were used for the nanocomposite preparation, native and surface acetylated CNF (ac-CNF). Samples were foamed in a mould to enable tensile testing. The effect of the mould use on the foam morphology was first assessed by comparison with free foamed samples. We found that the mould affected the cell growth stage of the foaming process in neat PLA foam while its effect was less important in nanocomposites. Stiffening and strengthening effect of CNF was greatly enhanced by foaming when compared to their solid counterparts. The most notable change in tensile properties was however the large increase in strain at break resulting in the high tensile toughness of microcellular PLA–CNF nanocomposites. Strain at break increased up to 7.5 times in neat PLA and up to 31.5 times in the foam containing 3% of CNF. Surface acetylation of CNF significantly affected the properties of foams with 9% of CNF loading: while foams with ac-CNF were stiffer, foams with native CNF exhibited higher strain at break and so higher overall toughness.
Rights: © 2014 Elsevier Ltd.
This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。
URI: http://hdl.handle.net/2433/192899
DOI(Published Version): 10.1016/j.reactfunctpolym.2014.07.016
Appears in Collections:Journal Articles

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