Publicação
Portuguese Hemp Plant as Raw Material for Papermaking
| dc.contributor.author | Baptista, C. | |
| dc.contributor.author | Santos, Natércia | |
| dc.contributor.author | Rosa, Manuel | |
| dc.date.accessioned | 2022-02-08T12:42:50Z | |
| dc.date.available | 2022-02-08T12:42:50Z | |
| dc.date.issued | 2020-03 | |
| dc.date.updated | 2022-02-04T19:04:57Z | |
| dc.description.abstract | The objectives of this study were the physical and chemical characterization of Portuguese industrial hemp and the assessment of its suitability to produce kraft pulp. A comparison was established with a reference eucalyptus pulp, obtained by the same chemical process. Handmade paper sheets were prepared in the laboratory using hemp pulp, eucalyptus pulp and a blend of both fibres in order to compare final paper properties. The unbleached pulp was produced by batch kraft cooking (NaOH + Na2S) and the evaluation of pulp bleachability was carried out under a D0E0D1E1D2 sequence. The physical properties of laboratory papers prepared with different compositions (100% hemp, 100% eucalyptus, hemp/eucalyptus 50:50) were assessed according to International Standards. Hemp fibres present two fractions, bast and core (33% and 67% of the total stem mass, respectively) with distinct biometric characteristics and cell composition. The hemp plant allowed cooking yield overlapping the wood reference, with lesser uncooked fractions. The pulp exhibited a good bleachability, even better than the reference. Hemp plant allowed a pulp with a higher gain of brightness and lower loss of intrinsic viscosity than eucalyptus. Hemp pulp also showed a better beatability, superiority in tearing resistance and a lower air permeability. The paper sheets obtained with the hemp/ eucalyptus mixture showed interesting properties, which predicts a suitable combination of these two raw materials for papermaking. | pt_PT |
| dc.description.sponsorship | The authors wish to thank the laboratorial work developed by the Chemical and Biochemical Engineering Degree students under the authors’ coordination, namely Afsar Ali, Luís Martins, Maria João Almeida, Rute Almeida and Soraia Henriques. | pt_PT |
| dc.description.version | info:eu-repo/semantics/publishedVersion | pt_PT |
| dc.identifier.doi | 10.30958/ajs.7-1-2 | pt_PT |
| dc.identifier.issn | 2241-8466 | |
| dc.identifier.slug | cv-prod-1482923 | |
| dc.identifier.uri | http://hdl.handle.net/10400.26/39250 | |
| dc.language.iso | eng | pt_PT |
| dc.peerreviewed | yes | pt_PT |
| dc.relation.publisherversion | https://www.athensjournals.gr/ajs/v7i1 | pt_PT |
| dc.rights.uri | http://creativecommons.org/licenses/by-nc/4.0/ | pt_PT |
| dc.subject | Bleachability | pt_PT |
| dc.subject | Hemp plant | pt_PT |
| dc.subject | Kraft cooking | pt_PT |
| dc.subject | Papermaking | pt_PT |
| dc.subject | Physical properties | pt_PT |
| dc.title | Portuguese Hemp Plant as Raw Material for Papermaking | pt_PT |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| oaire.citation.conferencePlace | Grécia | pt_PT |
| oaire.citation.endPage | 28 | pt_PT |
| oaire.citation.issue | 1 | pt_PT |
| oaire.citation.startPage | 15 | pt_PT |
| oaire.citation.title | Athens Journal of Sciences | pt_PT |
| oaire.citation.volume | 7 | pt_PT |
| person.familyName | de Melo Correia Baptista | |
| person.familyName | Santos | |
| person.familyName | Nogueira Henriques Rosa | |
| person.givenName | Cecília | |
| person.givenName | Natércia | |
| person.givenName | Manuel Alberto | |
| person.identifier.ciencia-id | 5210-7F4F-5F4D | |
| person.identifier.ciencia-id | D818-028B-F8AA | |
| person.identifier.ciencia-id | 5613-8477-1D3C | |
| person.identifier.orcid | 0000-0003-4664-6766 | |
| person.identifier.orcid | 0000-0002-5681-1780 | |
| person.identifier.orcid | 0000-0003-0768-6714 | |
| person.identifier.scopus-author-id | 36779562200 | |
| rcaap.cv.cienciaid | 5210-7F4F-5F4D | Cecília de Melo Correia Baptista | |
| rcaap.rights | openAccess | pt_PT |
| rcaap.type | article | pt_PT |
| relation.isAuthorOfPublication | bf47b097-76d9-43ed-8ef5-199fd69e4d8d | |
| relation.isAuthorOfPublication | 8dc2e993-10a5-4a92-96dd-ecb1b17b1b7e | |
| relation.isAuthorOfPublication | 9fa816d4-0c63-47ed-95d4-45bd651411c5 | |
| relation.isAuthorOfPublication.latestForDiscovery | 8dc2e993-10a5-4a92-96dd-ecb1b17b1b7e |