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Preparation of entangled nanocellulose fibers from APMP and its magnetic functional property as matrix.

Identifieur interne : 002525 ( Main/Exploration ); précédent : 002524; suivant : 002526

Preparation of entangled nanocellulose fibers from APMP and its magnetic functional property as matrix.

Auteurs : Wei Li [République populaire de Chine] ; Xin Zhao ; Shouxin Liu

Source :

RBID : pubmed:23544539

Descripteurs français

English descriptors

Abstract

Nanocellulose fibers (NCFs) aerogels were prepared from poplar alkaline peroxide mechanical pulp (APMP) using physical ultrasonication method. As raw materials, the unique mechanical effects of APMP cause the fiber folding and loose during the pulping process, which was beneficial to further chemical purification and subsequent treatment for long and entangled NCFs. The obtained NCFs exhibited higher crystallinity (77.8%) compared with that of APMP (72.6%) together with diameters range from 20 to 90 nm and self-assembled to network. The primary thermal degradation of NCFs occurred at 331.5°C. The prepared NCFs network aerogels acted as matrix which can prevent the growth and aggregation of ferromagnetic CoFe2O4 nanoparticles. The ratio of the CoFe2O4 of magnetic composites increased from 34 wt% to 75 wt%, and the magnetic properties were all increased with increasing the reaction concentration of FeSO4/CoCl2 salt.

DOI: 10.1016/j.carbpol.2013.01.052
PubMed: 23544539


Affiliations:


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<term>Ferrous Compounds (chemistry)</term>
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<term>Cellulose (composition chimique)</term>
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<term>Cobalt (composition chimique)</term>
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<term>Thermogravimétrie (MeSH)</term>
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<div type="abstract" xml:lang="en">Nanocellulose fibers (NCFs) aerogels were prepared from poplar alkaline peroxide mechanical pulp (APMP) using physical ultrasonication method. As raw materials, the unique mechanical effects of APMP cause the fiber folding and loose during the pulping process, which was beneficial to further chemical purification and subsequent treatment for long and entangled NCFs. The obtained NCFs exhibited higher crystallinity (77.8%) compared with that of APMP (72.6%) together with diameters range from 20 to 90 nm and self-assembled to network. The primary thermal degradation of NCFs occurred at 331.5°C. The prepared NCFs network aerogels acted as matrix which can prevent the growth and aggregation of ferromagnetic CoFe2O4 nanoparticles. The ratio of the CoFe2O4 of magnetic composites increased from 34 wt% to 75 wt%, and the magnetic properties were all increased with increasing the reaction concentration of FeSO4/CoCl2 salt.</div>
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