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Synergistic Role of Crosslinker and Silane-Based Additive in Designing Structurally Robust Bio-Based Polyurethane Coatings.

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Title: Synergistic Role of Crosslinker and Silane-Based Additive in Designing Structurally Robust Bio-Based Polyurethane Coatings.
Authors: Chaudhary, Mayankkumar L.1 (AUTHOR) kinalkumarrohitkumar.chaudhari@gus.pittstate.edu, Chaudhari, Kinal1,2 (AUTHOR), Patel, Rutu1,3 (AUTHOR), Gupta, Ram K.1,3 (AUTHOR) ramguptamsu@gmail.com
Source: Polymers (20734360). Jun2026, Vol. 18 Issue 12, p1490. 29p.
Subjects: Crosslinked polymers, Polyurethanes, Mechanical behavior of materials, Thermal stability, Chemical resistance, Hydrophobic compounds, Silane compounds, Coatings industry
Abstract: Bio-based polyurethane (PU) coatings offer sustainable alternatives to petrochemical coatings but often suffer from inferior mechanical performance, durability, and chemical resistance. This work addresses that challenge by integrating a trifunctional bio-based crosslinker (glycerol) and a silane-based additive (hexamethyldisilane (HMDS)) to simultaneously enhance structural robustness and hydrophobicity. Coatings were synthesized using a renewable soybean oil polyol (SOP), glycerol (5, 10, 15 and 20 wt.%), and methylene diphenyl diisocyanate (MDI), followed by the addition of HMDS (10, 20, 30, 40 and 50 wt.%). Mechanical tests identified 10 wt.% glycerol as the optimal content, yielding a maximum tensile strength of 47.18 MPa. Incorporating 10 wt.% HMDS into the optimized formulation greatly increased water contact angle (WCA, 95.76°) and chemical resistance with minimal loss of mechanical performance (38.19 MPa, tensile strength); higher HMDS loadings caused network disruption and reduced strength. Calorimetry and thermogravimetric analyses confirmed that the modified coatings retained high thermal stability. This synergistic crosslinker additive strategy produced a structurally robust, water-resistant bio-based coating, demonstrating a viable high-performance sustainable coating solution for industrial applications. [ABSTRACT FROM AUTHOR]
Copyright of Polymers (20734360) is the property of MDPI 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.)
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  Data: Synergistic Role of Crosslinker and Silane-Based Additive in Designing Structurally Robust Bio-Based Polyurethane Coatings.
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  Data: <searchLink fieldCode="JN" term="%22Polymers+%2820734360%29%22">Polymers (20734360)</searchLink>. Jun2026, Vol. 18 Issue 12, p1490. 29p.
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  Data: <searchLink fieldCode="DE" term="%22Crosslinked+polymers%22">Crosslinked polymers</searchLink><br /><searchLink fieldCode="DE" term="%22Polyurethanes%22">Polyurethanes</searchLink><br /><searchLink fieldCode="DE" term="%22Mechanical+behavior+of+materials%22">Mechanical behavior of materials</searchLink><br /><searchLink fieldCode="DE" term="%22Thermal+stability%22">Thermal stability</searchLink><br /><searchLink fieldCode="DE" term="%22Chemical+resistance%22">Chemical resistance</searchLink><br /><searchLink fieldCode="DE" term="%22Hydrophobic+compounds%22">Hydrophobic compounds</searchLink><br /><searchLink fieldCode="DE" term="%22Silane+compounds%22">Silane compounds</searchLink><br /><searchLink fieldCode="DE" term="%22Coatings+industry%22">Coatings industry</searchLink>
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  Data: Bio-based polyurethane (PU) coatings offer sustainable alternatives to petrochemical coatings but often suffer from inferior mechanical performance, durability, and chemical resistance. This work addresses that challenge by integrating a trifunctional bio-based crosslinker (glycerol) and a silane-based additive (hexamethyldisilane (HMDS)) to simultaneously enhance structural robustness and hydrophobicity. Coatings were synthesized using a renewable soybean oil polyol (SOP), glycerol (5, 10, 15 and 20 wt.%), and methylene diphenyl diisocyanate (MDI), followed by the addition of HMDS (10, 20, 30, 40 and 50 wt.%). Mechanical tests identified 10 wt.% glycerol as the optimal content, yielding a maximum tensile strength of 47.18 MPa. Incorporating 10 wt.% HMDS into the optimized formulation greatly increased water contact angle (WCA, 95.76°) and chemical resistance with minimal loss of mechanical performance (38.19 MPa, tensile strength); higher HMDS loadings caused network disruption and reduced strength. Calorimetry and thermogravimetric analyses confirmed that the modified coatings retained high thermal stability. This synergistic crosslinker additive strategy produced a structurally robust, water-resistant bio-based coating, demonstrating a viable high-performance sustainable coating solution for industrial applications. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Polymers (20734360) is the property of MDPI 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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      – Type: doi
        Value: 10.3390/polym18121490
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 29
        StartPage: 1490
    Subjects:
      – SubjectFull: Crosslinked polymers
        Type: general
      – SubjectFull: Polyurethanes
        Type: general
      – SubjectFull: Mechanical behavior of materials
        Type: general
      – SubjectFull: Thermal stability
        Type: general
      – SubjectFull: Chemical resistance
        Type: general
      – SubjectFull: Hydrophobic compounds
        Type: general
      – SubjectFull: Silane compounds
        Type: general
      – SubjectFull: Coatings industry
        Type: general
    Titles:
      – TitleFull: Synergistic Role of Crosslinker and Silane-Based Additive in Designing Structurally Robust Bio-Based Polyurethane Coatings.
        Type: main
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          Name:
            NameFull: Chaudhary, Mayankkumar L.
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            NameFull: Chaudhari, Kinal
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            NameFull: Patel, Rutu
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            NameFull: Gupta, Ram K.
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              M: 06
              Text: Jun2026
              Type: published
              Y: 2026
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