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Extraction of cellulose nanocrystals with structure I and II and their applications for reduction of graphene oxide and nanocomposite elaboration

2019-07Journal article Restricted access
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dc.contributor.authorKhili, Faouzia
dc.contributor.authorBorges, João
dc.contributor.authorAlmeida, Pedro L.
dc.contributor.authorBoukherroub, Rabah
dc.contributor.authorDakhlaoui Omrani, Amel
dc.date.accessioned2018-02-05T09:17:30Z
dc.date.available2018-02-05T09:17:30Z
dc.date.issued2019-07
dc.description.abstractThe aim of the present study is to investigate the effect of the hydrolysis process on the properties of nanocrystalline cellulose (NCC) isolated from different precursors and the subsequent use of the extracted NCC for the reduction of graphene oxide (GO). The raw materials (almond and peanut shells) chosen for the isolation of cellulose were selected on the basis of their abundance and their poorly investigation in the production of NCC. Microcrystalline cellulose (MCC) was firstly extracted by alkali and bleaching treatments, then hydrolyzed under different processes to produce NCC polymorphs with structure I (NCC-I) and NCC structure II (NCC-II). The Fourier transform infrared spectroscopy, the X-ray diffraction (XRD) and the 13C NMR studies of the alkali and bleached products confirmed the formation of cellulose type I with high purity and good crystallinity, while scanning electron microscopy (SEM) showed micrometric fibers with lengths reaching 80 µm. Sulfuric acid treatment of these microfibers results in NCC type I or II, depending on the hydrolysis process. SEM of the NCC samples exhibited nanorods with diameter and aspect ratio in the range of 20–40 and 20–25 nm, respectively. Thermogravimetric analysis (TGA) of the MCC and NCC products indicated stable materials with a degradation temperature reaching 240 and 200 °C for MCC and NCC, respectively. The other part of our work concerns the use of the obtained cellulose nanocrystals (type II) for the preparation of reduced graphene oxide composite (NCC/RGO), to demonstrate the reducing properties of the isolated NCCII.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationKHILI, Faouzia; [et al] – Extraction of cellulose nanocrystals with structure I and II and their applications for reduction of graphene oxide and nanocomposite elaboration. Waste and Biomass Valorization. ISSN 1877-2641. Vol. 10, N.º 7 (2019), pp. 1913-1927pt_PT
dc.identifier.doihttps://doi.org/10.1007/s12649-018-0202-4pt_PT
dc.identifier.issn1877-2641
dc.identifier.issn1877-265X
dc.identifier.urihttp://hdl.handle.net/10400.21/8021
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherSpringer Publishing Companypt_PT
dc.relationFCT - FCT/5964/27/5/2013/Spt_PT
dc.relationFCT - PTDC/FIS/NAN/0117/2014pt_PT
dc.relationFEDER funds through the COMPETE 2020 Programpt_PT
dc.relationFCT - UID/CTM/50025/2013/Spt_PT
dc.relationPortuguese Nuclear Magnetic Resonance Network (PTNMR)pt_PT
dc.relation.publisherversionhttps://link.springer.com/content/pdf/10.1007%2Fs12649-018-0202-4.pdfpt_PT
dc.subjectCellulose agrosourcespt_PT
dc.subjectCellulose nanocrystalspt_PT
dc.subjectSulfuric acid hydrolysispt_PT
dc.subjectCellulose nanorodspt_PT
dc.subjectGraphene oxidept_PT
dc.subjectReduced graphene oxide compositept_PT
dc.titleExtraction of cellulose nanocrystals with structure I and II and their applications for reduction of graphene oxide and nanocomposite elaborationpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage1927pt_PT
oaire.citation.issue7
oaire.citation.startPage1913pt_PT
oaire.citation.titleWaste and Biomass Valorizationpt_PT
oaire.citation.volume10
person.familyNamekhili
person.familyNameMarques de Almeida
person.familyNameBoukherroub
person.familyNameDakhlaoui Omrani
person.givenNameFaouzia
person.givenNamePedro
person.givenNameRabah
person.givenNameAmel
person.identifier.ciencia-id0218-71B2-2DE0
person.identifier.orcid0000-0003-4089-649X
person.identifier.orcid0000-0001-7356-8455
person.identifier.orcid0000-0002-9795-9888
person.identifier.orcid0000-0002-1451-6409
person.identifier.ridB-4356-2009
person.identifier.ridI-4826-2017
person.identifier.ridA-2260-2016
person.identifier.scopus-author-id57190384213
person.identifier.scopus-author-id8544985800
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication1b73c13e-99d9-4597-8d6e-131a499d1b92
relation.isAuthorOfPublication429b6d71-328e-42b3-8151-15493de249b8
relation.isAuthorOfPublicationddada36b-fa84-4927-a0f5-190dd4f4ad9b
relation.isAuthorOfPublication062deaf7-88af-467f-b784-f87b16c29a07
relation.isAuthorOfPublication.latestForDiscovery1b73c13e-99d9-4597-8d6e-131a499d1b92

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