Highly water- and oil-resistant cellulose paper fabricated through partial dissolution and regeneration based on different coagulation bath

Ruotong Yao ¹, Lijiaqi Zhang ¹, Chao Wang ¹

⁰Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China; College of Materials Science and Optoelectronic Technology, University of Chinese Academy of Sciences, Beijing, 100049, China.

International Journal of Biological Macromolecules +

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October 11, 2025

View abstract on PubMed

Summary

Researchers developed a novel, eco-friendly paper packaging using a deep eutectic solvent (DES) to enhance barrier properties and wet strength. This regenerated cellulose paper offers a sustainable alternative to plastic, ideal for food packaging applications.

Area Of Science

Materials Science
Green Chemistry
Polymer Science

Background

Traditional plastic packaging poses environmental challenges.
Paper packaging lacks sufficient barrier properties and wet strength for many applications.
Developing sustainable alternatives is crucial for reducing plastic waste.

Purpose Of The Study

To create enhanced paper packaging with improved barrier properties and wet strength.
To explore the use of deep eutectic solvents (DES) for paper modification.
To develop an environmentally friendly alternative to plastic packaging.

Main Methods

Utilized a deep eutectic solvent (DES, ZnCl2/H2O/HCOOH) to partially dissolve ready-made paper at ambient temperature.
Regenerated cellulose paper through immersion in seven different coagulation baths.
Tailored barrier properties by modulating the polarity of the coagulation bath.

Main Results

Regenerated paper exhibited tailored barrier properties influenced by coagulation bath polarity.
Paper regenerated in ethylene glycol showed 60% light transmittance, 56 MPa dry strength, and 22 MPa wet strength.
Achieved a low water vapor transmission rate (62 g·m-2d-1) and superior oil repellency (kit value 12/12).

Conclusions

A facile and cost-effective method for producing water- and oil-proof paper packaging was developed.
Partially regenerated cellulose paper demonstrates excellent performance for food packaging.
This approach offers a novel, environmentally friendly alternative to conventional plastic packaging.

Keywords:

Coagulation bath Oil and water resistance Paper packaging Partial dissolution Regeneration