SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2024, Vol. 67 ›› Issue (3): 49-57.DOI: 10.1016/j.cjche.2023.08.011

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Alleviation of the plastic deformation of gel ink under strong stress through an esterification of xanthan gum reinforcing its double helix structure

Xiaokun Li1, Mingyi Wang1, Zilu Liu1, Song Yang1,2, Na Xu1,3, Wei Zhao1, Gan Luo1, Shoujun Liu1,2   

  1. 1 College of Chemical Engineering and Technology, Taiyuan University of Technology, Taiyuan 030024, China;
    2 Shanxi Engineering Center of Civil Clean Fuel, Taiyuan University of Technology, Taiyuan 030024, China;
    3 Shanxi Coking Coal in Yuncheng Salt Refco Group Ltd., Yuncheng 044000, China
  • 收稿日期:2023-02-21 修回日期:2023-07-27 出版日期:2024-03-28 发布日期:2024-06-01
  • 通讯作者: Song Yang,E-mail address:yangsong@tyut.edu.cn;Na Xu,E-mail address:naxu_xjtu@163.com.
  • 基金资助:
    This work was supported by Shanxi Provincial Science and Technology Achievement Transformation Guidance Special Program of China (202104021301052) and Shanxi Provincial Patent Transformation Special Plan Project (202202054, 202306013).

Alleviation of the plastic deformation of gel ink under strong stress through an esterification of xanthan gum reinforcing its double helix structure

Xiaokun Li1, Mingyi Wang1, Zilu Liu1, Song Yang1,2, Na Xu1,3, Wei Zhao1, Gan Luo1, Shoujun Liu1,2   

  1. 1 College of Chemical Engineering and Technology, Taiyuan University of Technology, Taiyuan 030024, China;
    2 Shanxi Engineering Center of Civil Clean Fuel, Taiyuan University of Technology, Taiyuan 030024, China;
    3 Shanxi Coking Coal in Yuncheng Salt Refco Group Ltd., Yuncheng 044000, China
  • Received:2023-02-21 Revised:2023-07-27 Online:2024-03-28 Published:2024-06-01
  • Contact: Song Yang,E-mail address:yangsong@tyut.edu.cn;Na Xu,E-mail address:naxu_xjtu@163.com.
  • Supported by:
    This work was supported by Shanxi Provincial Science and Technology Achievement Transformation Guidance Special Program of China (202104021301052) and Shanxi Provincial Patent Transformation Special Plan Project (202202054, 202306013).

摘要: As a natural organic polymer, xanthan gum (XG) can alleviate the plastic deformation of gel ink under strong stress and realize the reasonable regulation of the rheological properties of gel ink. However, as the double-helix structure connected by hydrogen bonds cannot resist the mechanical environment of strong stress, XG shows poor shear resistance. In this study, a polymer gel with interpenetrating polymer network structure was prepared by esterifying XG, taking polystyrene maleic anhydride (SMA) as the modifier. In addition to retaining the excellent rheological properties of XG, the generated polymer gel also exhibited high shear resistance. The optimal addition amount of the esterification reaction modifier was determined as mXG: mSMA = 5:3 according to the gel ink standard. With this amount, the viscosity of the modified xanthan gum (SXG) gel increased to 1578.8 mPa·s and 100.7 mPa·s at shear rates of 4 s-1 and 383 s-1, respectively, and the shear resistance increased more than 2 times compared to the unmodified one. It is because of the ester bond formed by esterification that the reaction strengthens the interaction between molecular segments, enabling the new gel to resist to strong mechanical stress. The new polymer gel studied in this paper and the proposed mechanism of action provide new insights for the development of high-end gel ink and also provide theoretical support for the study of rheological properties of non-Newtonian fluids.

关键词: Gel ink, Xanthan gum, Esterification, Simulation, Shear resistance, Gels

Abstract: As a natural organic polymer, xanthan gum (XG) can alleviate the plastic deformation of gel ink under strong stress and realize the reasonable regulation of the rheological properties of gel ink. However, as the double-helix structure connected by hydrogen bonds cannot resist the mechanical environment of strong stress, XG shows poor shear resistance. In this study, a polymer gel with interpenetrating polymer network structure was prepared by esterifying XG, taking polystyrene maleic anhydride (SMA) as the modifier. In addition to retaining the excellent rheological properties of XG, the generated polymer gel also exhibited high shear resistance. The optimal addition amount of the esterification reaction modifier was determined as mXG: mSMA = 5:3 according to the gel ink standard. With this amount, the viscosity of the modified xanthan gum (SXG) gel increased to 1578.8 mPa·s and 100.7 mPa·s at shear rates of 4 s-1 and 383 s-1, respectively, and the shear resistance increased more than 2 times compared to the unmodified one. It is because of the ester bond formed by esterification that the reaction strengthens the interaction between molecular segments, enabling the new gel to resist to strong mechanical stress. The new polymer gel studied in this paper and the proposed mechanism of action provide new insights for the development of high-end gel ink and also provide theoretical support for the study of rheological properties of non-Newtonian fluids.

Key words: Gel ink, Xanthan gum, Esterification, Simulation, Shear resistance, Gels