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Covalent functionalization of cellulose in cotton and a nylon-cotton blend with phytic acid for flame retardant properties

  • Sammaiah Thota
  • Varaprasad Somisetti
  • Sourabh Kulkarni
  • Jayant Kumar
  • Ramaswamy Nagarajan
  • Ravi MosurkalEmail author


A new and versatile method to covalently functionalize cellulose in cotton and Nylon/cotton (Nyco) blends with plant-based renewable material, phytic acid to impart flame retardant characteristics that is durable is presented. This involves functionalization of 1,1′-carbonyldiimidazole to the cellulose structure of cotton followed by the attachment of diamine and phytic acid through carbamate bonds. In the vertical flame test, phytic acid functionalized cotton and Nyco fabrics exhibit self-extinguishing behavior, whereas control samples burned completely. Pyrolysis combustion flow calorimetry confirmed that phytic acid functionalized cotton and Nyco fabrics showed a reduction in the heat release capacity and the total heat release. In this short communication, we present synthesis, chemical characterization using Fourier transform infrared spectroscopy and Scanning electron spectroscopy, Energy dispersive spectroscopy and study of thermal and flame retardant properties using thermogravimetric analysis, Pyrolysis combustion flow calorimetry and Vertical flame test of phytic acid functionalized cotton and Nyco fabrics.

Graphic abstract


Flame retardant Cotton Nylon-cotton Nyco Phytic acid Surface-functionalization 



Financial Support from US Army CCDC Soldier Center is gratefully acknowledged. Approved for public release (PAO#: U19-990).

Supplementary material

10570_2019_2801_MOESM1_ESM.docx (149 kb)
Supplementary material 1 (DOCX 148 kb)


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Copyright information

© This is a U.S. Government work and not under copyright protection in the US; foreign copyright protection may apply  2019

Authors and Affiliations

  • Sammaiah Thota
    • 1
  • Varaprasad Somisetti
    • 1
    • 2
  • Sourabh Kulkarni
    • 3
  • Jayant Kumar
    • 1
    • 4
  • Ramaswamy Nagarajan
    • 1
    • 2
  • Ravi Mosurkal
    • 1
    • 5
    Email author
  1. 1.HEROES Initiative, Center for Advanced Materials, University of Massachusetts LowellLowellUSA
  2. 2.Department of Plastics EngineeringUniversity of Massachusetts LowellLowellUSA
  3. 3.Department of Mechanical EngineeringUniversity of Massachusetts LowellLowellUSA
  4. 4.Department of Physics and Applied PhysicsUniversity of Massachusetts LowellLowellUSA
  5. 5.Bio-Science & Technology Team, SPO DirectorateUS Army CCDC Soldier CenterNatickUSA

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