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Jiang, Xin; Liu, Haipeng; Han, Jiali; Feng, Lei; Wang, Jia; Li, Ling; Kitazawa, Hiroaki; Wang, Xiangyou; Guo, Yanyin; Wang, Zongmin
International journal of biological macromolecules, June 2024, 2024-06-00, 20240601, Letnik: 272, Številka: Pt 2Journal Article
Guar gum (GG) as a polymer biopolymer is widely used in the field of bio-based packaging. However, its poor mechanical properties, barrier properties and high viscosity greatly hinder its use as an effective packaging material. Therefore, this study introduced CPTES to improve the mechanical (16.58–27.39 MPa) and tensile properties (26.80 %–30.67 %). The FTIR and XRD results indicated a strong interaction between the biofilm fractions modified by CPTES, CPTES bound to the hydroxyl groups on GG and formed a dense polysiloxane network through adsorption and grafting. OM and AFM reflect a denser and flatter film structure on the surface of the G30 film, which has the best film formation. Based on this, the pH of the solution was further adjusted to reach an alkaline environment, disrupting the intermolecular binding through electrostatic repulsion. The rheological behavior indicates that the viscosity and viscoelasticity of film solution gradually decrease with the increase in pH. OM and AFM results show that the G30/8 film has the best compact properties, while the nonporous compact film structure further improves the mechanical, barrierand and thermodynamic properties of the film. Accordingly, the findings of this study had a certain value for regulating the low viscoelasticity of GG emulsion and enhancing the stability of film formation. Display omitted •(3-Chloropropyl) triethoxysilane improved mechanical and barrier properties of film.•The polysiloxane structure enhanced the connectivity between molecular chains.•The pH regulated the solution viscoelasticity.•Compared with guar gum, G30/8 displayed the best fluid and film performance.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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