Polypyrrole-coated nanocellulose for solar steam generation: A multi-surface photothermal ink with antibacterial and antifouling properties

Carbohydr Polym. 2022 Sep 15:292:119701. doi: 10.1016/j.carbpol.2022.119701. Epub 2022 Jun 9.

Abstract

Solar energy-based steam generation holds immense potential to tackle the problem of 1.1 billion people lacking access to freshwater and 2.7 billion experiencing freshwater scarcity at least one month a year. Efficient, portable, and universal photothermal materials are required for popularity of solar-driven evaporation systems. Herein, a facile one-pot process based on solution-processed vapor phase polymerization is adopted to fabricate polypyrrole-coated cellulose nanocrystals (CNC-PPy). The CNC-PPy dispersed in water is used as an ink (CNC-PPy ink) to create photothermal layers. The developed ink is readily laminated on diverse substrates utilizing a common paintbrush that firmly attached without any delamination after drying. The optimized cellulose membrane (6 coating cycles) presents an excellent evaporation rate of 1.96 Kg m-2 h-1 with corresponding light-to-vapor efficiency of 88.92 % at 1 sun. In addition, the CNC-PPy display excellent antibacterial and antifouling properties in powder and laminated forms against E. coli and S. aureus.

Keywords: Antibacterial; Antifouling; Cellulose nanocrystals; Ink; Polypyrrole; Solar steam generation.

MeSH terms

  • Anti-Bacterial Agents / chemistry
  • Anti-Bacterial Agents / pharmacology
  • Biofouling* / prevention & control
  • Cellulose / chemistry
  • Cellulose / pharmacology
  • Escherichia coli
  • Humans
  • Ink
  • Polymers* / chemistry
  • Polymers* / pharmacology
  • Pyrroles / chemistry
  • Staphylococcus aureus
  • Steam

Substances

  • Anti-Bacterial Agents
  • Polymers
  • Pyrroles
  • Steam
  • polypyrrole
  • Cellulose