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An ionic liquid crystal functionalized nanocellulose lubricant additives.

Zhiqiang Shan1, Xiaohua Jia1, Jin Yang1

  • 1School of Materials Science and Engineering, Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, Shaanxi University of Science & Technology, Xi'an 710021, PR China.

Carbohydrate Polymers
|November 1, 2024
PubMed
Summary

This study introduces ionic liquid crystal nanocellulose (ILC-NC) as a superior bio-lubricant additive. ILC-NC significantly reduces friction and wear in water and sunflower oil, offering a sustainable lubrication solution.

Keywords:
FrictionIonic liquid crystalLubricant additivesNanocellulose

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Area of Science:

  • Materials Science
  • Tribology
  • Green Chemistry

Background:

  • Cellulose is abundant and sustainable but shows poor performance as a bio-lubricant.
  • Developing effective bio-lubricant additives is crucial for sustainable industrial applications.

Purpose of the Study:

  • To functionalize nanocellulose with ionic liquid crystals to enhance its lubrication properties.
  • To evaluate the tribological performance of the novel ILC-NC material in aqueous and oil-based systems.

Main Methods:

  • Extraction of nanocellulose from poplar waste using deep eutectic solvent and chlorine bleaching.
  • Functionalization of nanocellulose with 1-hexadecyl-3-methylimidazolium bromide via hydrothermal treatment to create ILC-NC.
  • Evaluation of dispersion stability and lubrication performance using friction and wear tests on steel surfaces.

Main Results:

  • ILC-NC demonstrated excellent dispersion stability in water and vegetable oil.
  • ILC-NC reduced the coefficient of friction by 68.75% and wear rate by 74.07% in aqueous dispersion compared to ILC/NC.
  • In sunflower oil, ILC-NC achieved a minimum coefficient of friction of 0.032, a 77.91% reduction compared to pure oil.

Conclusions:

  • Ionic liquid crystal functionalization significantly enhances nanocellulose's lubrication capabilities.
  • ILC-NC presents a promising, high-performance bio-lubricant additive derived from sustainable resources.
  • The study elucidates the lubrication mechanism of ILC-NC on steel surfaces.