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Cynara cardunculus as Raw Material for the Production of Binderless Fiberboards: Optimization of Pretreatment and Pressing Conditions.

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Title: Cynara cardunculus as Raw Material for the Production of Binderless Fiberboards: Optimization of Pretreatment and Pressing Conditions.
Authors: Mancera, C.1, Ferrando, F.1 f.ferrando@urv.net, Salvado, J.2
Source: Journal of Wood Chemistry & Technology. Jul-Sep2008, Vol. 28 Issue 3, p207-226. 20p. 3 Charts, 15 Graphs.
Subjects: Cardoon, Fiberboard, Adhesives, Raw materials, Wood waste
Abstract: Cynara cardunculus was pretreated and used to produce fiberboards without synthetic adhesives. The lignocellulosic material was steam exploded through a thermo-mechanical vapor process in a batch reactor. After pretreatment the material was dried, ground, and pressed to produce the boards. The effects of pretreatment factors and pressing conditions on the chemical and physico-mechanical properties of the fiberboards were evaluated and the conditions that optimize these properties were found. Response surface methodology based on a central composite design and multiple response optimization were used. The variables studied and their respective variation ranges were: pretreatment temperature, 160-240°C; pretreatment time 2.5-12.5 min; pressing temperature, 190-230°C; initial and final pressing pressures, 4-20 MPa, and initial and final pressing times, 1-9 min. Good properties were obtained at optimum conditions found (modulus of elasticity up to 5970 MPa, modulus of rupture up to 59 MPa, internal bond up to 0.8 MPa, thickness swelling as low as13.5%, and water absorption as low as 18.5%). Some of the boards fully satisfy the standard specifications although they were not produced at the optimum combination of process factors. Optimum operational conditions for producing binderless fiberboards from Cynara cardunculus that fully satisfy the European standards were found based on multiple response optimization methodology. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Wood Chemistry & Technology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 34130056
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Label: Title
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  Data: Cynara cardunculus as Raw Material for the Production of Binderless Fiberboards: Optimization of Pretreatment and Pressing Conditions.
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  Data: <searchLink fieldCode="AR" term="%22Mancera%2C+C%2E%22">Mancera, C.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Ferrando%2C+F%2E%22">Ferrando, F.</searchLink><relatesTo>1</relatesTo><i> f.ferrando@urv.net</i><br /><searchLink fieldCode="AR" term="%22Salvado%2C+J%2E%22">Salvado, J.</searchLink><relatesTo>2</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Wood+Chemistry+%26+Technology%22">Journal of Wood Chemistry & Technology</searchLink>. Jul-Sep2008, Vol. 28 Issue 3, p207-226. 20p. 3 Charts, 15 Graphs.
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  Label: Subjects
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  Data: <searchLink fieldCode="DE" term="%22Cardoon%22">Cardoon</searchLink><br /><searchLink fieldCode="DE" term="%22Fiberboard%22">Fiberboard</searchLink><br /><searchLink fieldCode="DE" term="%22Adhesives%22">Adhesives</searchLink><br /><searchLink fieldCode="DE" term="%22Raw+materials%22">Raw materials</searchLink><br /><searchLink fieldCode="DE" term="%22Wood+waste%22">Wood waste</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Cynara cardunculus was pretreated and used to produce fiberboards without synthetic adhesives. The lignocellulosic material was steam exploded through a thermo-mechanical vapor process in a batch reactor. After pretreatment the material was dried, ground, and pressed to produce the boards. The effects of pretreatment factors and pressing conditions on the chemical and physico-mechanical properties of the fiberboards were evaluated and the conditions that optimize these properties were found. Response surface methodology based on a central composite design and multiple response optimization were used. The variables studied and their respective variation ranges were: pretreatment temperature, 160-240°C; pretreatment time 2.5-12.5 min; pressing temperature, 190-230°C; initial and final pressing pressures, 4-20 MPa, and initial and final pressing times, 1-9 min. Good properties were obtained at optimum conditions found (modulus of elasticity up to 5970 MPa, modulus of rupture up to 59 MPa, internal bond up to 0.8 MPa, thickness swelling as low as13.5%, and water absorption as low as 18.5%). Some of the boards fully satisfy the standard specifications although they were not produced at the optimum combination of process factors. Optimum operational conditions for producing binderless fiberboards from Cynara cardunculus that fully satisfy the European standards were found based on multiple response optimization methodology. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Wood Chemistry & Technology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1080/02773810802347024
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      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 20
        StartPage: 207
    Subjects:
      – SubjectFull: Cardoon
        Type: general
      – SubjectFull: Fiberboard
        Type: general
      – SubjectFull: Adhesives
        Type: general
      – SubjectFull: Raw materials
        Type: general
      – SubjectFull: Wood waste
        Type: general
    Titles:
      – TitleFull: Cynara cardunculus as Raw Material for the Production of Binderless Fiberboards: Optimization of Pretreatment and Pressing Conditions.
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            NameFull: Mancera, C.
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            NameFull: Ferrando, F.
      – PersonEntity:
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            NameFull: Salvado, J.
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          Dates:
            – D: 01
              M: 07
              Text: Jul-Sep2008
              Type: published
              Y: 2008
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              Value: 02773813
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              Value: 28
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              Value: 3
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            – TitleFull: Journal of Wood Chemistry & Technology
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