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Effect of distinct molecular structure of diols on the properties of bio-based wood adhesive.

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Title: Effect of distinct molecular structure of diols on the properties of bio-based wood adhesive.
Authors: Patel, Rutu1,2 (AUTHOR), Chaudhary, Mayankkumar L.1,2 (AUTHOR), Chaudhary, Smit1,2 (AUTHOR), Gupta, Ram K.1,2 (AUTHOR) ramguptamsu@gmail.com
Source: International Journal of Adhesion & Adhesives. Mar2025, Vol. 138, pN.PAG-N.PAG. 1p.
Subjects: Sustainable design, Molecular structure, Thermal stability, Hydroquinone, Glycols, Isocyanates, Adhesives
Abstract: This study aimed to investigate the effect of different diol structures, both aliphatic and aromatic, on wood adhesives derived from renewable sources. Therefore, 1,3-propanediol (PRD), 1,5-pentanediol (PED), and hydroquinone (HQ) were used as crosslinkers with a non-edible oil-based polyol (castor oil (CO)). The HQ-based wood adhesive sample was anticipated to demonstrate higher mechanical strength due to its aromatic structure, which can impart rigidity and potentially lead to increased mechanical properties. Different weight percentages of diols relative to the bio-polyol were incorporated with the bio-polyol and isocyanate to prepare polyurethane (PU)-based wood adhesives, aiming to explore the effect of increasing diol concentrations on adhesive properties. All samples were cured at four different temperatures (room temperature, 50 °C, 75 °C, and 100 °C) to investigate thermal stability and mechanical strength. Unexpectedly, among all prepared adhesive samples, the PRD sample exhibited the highest mechanical strength (5.1 MPa). Gel and swell tests were conducted on all prepared samples to evaluate solubility, followed by FT-IR analysis to assess structural changes after these tests. No major changes were observed in the synthesized adhesive materials, indicating good crosslinking. The importance of bio-based materials in advanced wood adhesive applications is highlighted by our findings, which provide valuable insights into the design of sustainable PU adhesives with optimal characteristics. [Display omitted] [ABSTRACT FROM AUTHOR]
Copyright of International Journal of Adhesion & Adhesives is the property of Elsevier B.V. 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: 182955183
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Label: Title
  Group: Ti
  Data: Effect of distinct molecular structure of diols on the properties of bio-based wood adhesive.
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  Data: <searchLink fieldCode="AR" term="%22Patel%2C+Rutu%22">Patel, Rutu</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Chaudhary%2C+Mayankkumar+L%2E%22">Chaudhary, Mayankkumar L.</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Chaudhary%2C+Smit%22">Chaudhary, Smit</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Gupta%2C+Ram+K%2E%22">Gupta, Ram K.</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> ramguptamsu@gmail.com</i>
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  Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Adhesion+%26+Adhesives%22">International Journal of Adhesion & Adhesives</searchLink>. Mar2025, Vol. 138, pN.PAG-N.PAG. 1p.
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  Label: Subjects
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  Data: <searchLink fieldCode="DE" term="%22Sustainable+design%22">Sustainable design</searchLink><br /><searchLink fieldCode="DE" term="%22Molecular+structure%22">Molecular structure</searchLink><br /><searchLink fieldCode="DE" term="%22Thermal+stability%22">Thermal stability</searchLink><br /><searchLink fieldCode="DE" term="%22Hydroquinone%22">Hydroquinone</searchLink><br /><searchLink fieldCode="DE" term="%22Glycols%22">Glycols</searchLink><br /><searchLink fieldCode="DE" term="%22Isocyanates%22">Isocyanates</searchLink><br /><searchLink fieldCode="DE" term="%22Adhesives%22">Adhesives</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: This study aimed to investigate the effect of different diol structures, both aliphatic and aromatic, on wood adhesives derived from renewable sources. Therefore, 1,3-propanediol (PRD), 1,5-pentanediol (PED), and hydroquinone (HQ) were used as crosslinkers with a non-edible oil-based polyol (castor oil (CO)). The HQ-based wood adhesive sample was anticipated to demonstrate higher mechanical strength due to its aromatic structure, which can impart rigidity and potentially lead to increased mechanical properties. Different weight percentages of diols relative to the bio-polyol were incorporated with the bio-polyol and isocyanate to prepare polyurethane (PU)-based wood adhesives, aiming to explore the effect of increasing diol concentrations on adhesive properties. All samples were cured at four different temperatures (room temperature, 50 °C, 75 °C, and 100 °C) to investigate thermal stability and mechanical strength. Unexpectedly, among all prepared adhesive samples, the PRD sample exhibited the highest mechanical strength (5.1 MPa). Gel and swell tests were conducted on all prepared samples to evaluate solubility, followed by FT-IR analysis to assess structural changes after these tests. No major changes were observed in the synthesized adhesive materials, indicating good crosslinking. The importance of bio-based materials in advanced wood adhesive applications is highlighted by our findings, which provide valuable insights into the design of sustainable PU adhesives with optimal characteristics. [Display omitted] [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of International Journal of Adhesion & Adhesives is the property of Elsevier B.V. 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:
  BibEntity:
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      – Type: doi
        Value: 10.1016/j.ijadhadh.2025.103936
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      – Code: eng
        Text: English
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        PageCount: 1
        StartPage: N.PAG
    Subjects:
      – SubjectFull: Sustainable design
        Type: general
      – SubjectFull: Molecular structure
        Type: general
      – SubjectFull: Thermal stability
        Type: general
      – SubjectFull: Hydroquinone
        Type: general
      – SubjectFull: Glycols
        Type: general
      – SubjectFull: Isocyanates
        Type: general
      – SubjectFull: Adhesives
        Type: general
    Titles:
      – TitleFull: Effect of distinct molecular structure of diols on the properties of bio-based wood adhesive.
        Type: main
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          Name:
            NameFull: Patel, Rutu
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            NameFull: Chaudhary, Mayankkumar L.
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            NameFull: Chaudhary, Smit
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            NameFull: Gupta, Ram K.
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          Dates:
            – D: 01
              M: 03
              Text: Mar2025
              Type: published
              Y: 2025
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              Value: 138
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            – TitleFull: International Journal of Adhesion & Adhesives
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