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Eco-friendly alkaline lignin/cellulose nanofiber drying system for efficient redispersion behavior.

Jungkyu Kim1, Junsik Bang1, YunJin Kim1

  • 1Department of Agriculture, Forestry and Bioresources, College of Agriculture & Life Sciences, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea.

Carbohydrate Polymers
|February 6, 2022
PubMed
Summary

Lignin addition prevents nanocellulose aggregation during drying, maintaining its properties. This eco-friendly method allows for easy lignin removal and material redispersion, overcoming a key commercialization barrier.

Keywords:
AgglomerationAlkali ligninNanocelluloseRedispersion

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Area of Science:

  • Materials Science
  • Biomaterials Engineering
  • Polymer Chemistry

Background:

  • Nanocellulose is a sustainable, high-performance biomaterial.
  • Agglomeration during drying hinders nanocellulose applications.
  • Developing effective drying methods is crucial for commercialization.

Purpose of the Study:

  • To develop a simple and effective nanocellulose drying system.
  • To utilize lignin as an eco-friendly additive to prevent nanocellulose aggregation.
  • To assess the impact of lignin on nanocellulose properties and redispersion.

Main Methods:

  • Incorporation of lignin into nanocellulose suspensions.
  • Drying and dehydration of nanocellulose with lignin additive.
  • Characterization using FTIR, XRD, TGA, tensile, and swelling tests.
  • Evaluation of redispersion kinetics and stability.
  • Lignin removal via a simple washing process.

Main Results:

  • Lignin addition significantly minimized nanocellulose aggregation during drying.
  • Lignin ensured excellent redispersion kinetics and stability of dried nanocellulose.
  • Added lignin was effectively removed through a simple washing step.
  • Physicochemical properties of nanocellulose were reversibly restored to pristine levels.

Conclusions:

  • Lignin is an effective, eco-friendly additive for preventing nanocellulose aggregation during drying.
  • This method facilitates the reversible recovery of nanocellulose properties, enabling advanced applications.
  • The lignin-assisted drying system offers a viable solution for nanocellulose commercialization.