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Related Concept Videos

Bioplastics01:27

Bioplastics

Bioplastics derived from microbial processes present a sustainable alternative to conventional petroleum-based plastics. Among these, polyhydroxyalkanoates (PHAs), particularly polyhydroxybutyrates (PHBs), have emerged as prominent candidates due to their biodegradability and biocompatibility. These polymers are synthesized by a variety of bacteria, such as Cupriavidus necator and Pseudomonas putida, which naturally accumulate PHAs as intracellular carbon and energy reserves, especially under...
Microbial Bioremediation of Plastics01:28

Microbial Bioremediation of Plastics

Polyethylene terephthalate (PET) is a synthetic polymer widely utilized in the packaging industry, particularly for bottles and containers. Due to its chemical stability and durability, PET accumulates in the environment, contributing significantly to plastic pollution. It comprises repeating units of terephthalic acid and ethylene glycol, resulting in a semi-crystalline structure that is resistant to natural degradation processes.A notable breakthrough in plastic biodegradation came with the...

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Microembossing: A Convenient Process for Fabricating Microchannels on Nanocellulose Paper-Based Microfluidics
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Nanoengineered All-Cellulose Bilayer Barrier Papers for High-Performance and Recyclable Food Packaging.

Roufen Wu1,2, Jiahe Li1,2, Ze Ji1,2

  • 1Key Laboratory of Biomass Chemical Engineering of Ministry of Education, State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310058, PR China.

Chem & Bio Engineering
|June 30, 2026
PubMed
Summary

A novel all-cellulose bilayer paper utilizes cellulose nanofibrils (CNFs) for enhanced barrier properties and mechanical strength. This sustainable food packaging solution offers superior performance and recyclability compared to conventional plastic and paper alternatives.

Keywords:
barrier papersbarrier propertiesbilayer structurefood packagingnanocellulosepolymer-free coatingsustainable materials

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Area of Science:

  • Materials Science
  • Sustainable Packaging
  • Nanotechnology

Background:

  • Plastic packaging presents significant environmental concerns.
  • Current paper-based alternatives often use unsustainable coatings and additives for performance.
  • There is a need for high-performance, eco-friendly packaging materials.

Purpose of the Study:

  • To develop an all-cellulose bilayer barrier paper using cellulose nanofibrils (CNFs).
  • To achieve superior barrier and mechanical properties for food packaging applications.
  • To enhance the sustainability and recyclability of paper-based packaging.

Main Methods:

  • Developed an all-cellulose bilayer structure by combining pulp fibers and CNFs via filtration.
  • CNFs act as both a coating and reinforcing agent, inducing spontaneous bilayer formation.
  • Evaluated barrier properties (oil, water, oxygen, air), thermal stability, and mechanical strength.

Main Results:

  • Achieved excellent oil resistance (KIT Level 12 at 85 °C), improved water resistance (Cobb60 reduced to 50 g·m-2), and high thermal stability (up to 270 °C).
  • Demonstrated a 200% improvement in mechanical and wet strength, suitable for demanding food packaging.
  • The all-cellulose material achieved over 98% fiber recovery through recycling, significantly reducing carbon footprint.

Conclusions:

  • The developed all-cellulose bilayer paper offers a high-performance, sustainable alternative to plastic packaging.
  • The material exhibits excellent barrier properties, mechanical strength, and robust recyclability.
  • This biobased platform provides a promising solution for environmentally impactful food packaging.