American University
Browse
thesesdissertations_391_OBJ.pdf (2.06 MB)

MODIFICATION AND FLUORESCENCE MONITORING OF CELLULOSE PHOSPHATE FOR INTUMESCENT FLAME RETARDANT APPLICATIONS IN POLY LACTIC ACID

Download (2.06 MB)
thesis
posted on 2023-08-04, 17:42 authored by Srilatha Temburni

This thesis focuses on the synthesis of Intumescent Flame Retardant (IFR) from a sustainable resource that is abundant, environmentally less toxic than standard IFRs, biodegradable and economical. For this purpose Nano Fibrillated Cellulose (NFC) was used as a carbon /char producing source. Modification by phosphorous and nitrogen compounds as acid and gas producing agents resulted in the synthesis of IFR. Fourier Transform Infrared Spectroscopy (FTIR) was used to confirm the modification of the cellulose. Thermo Gravimetric Analysis (TGA) was performed to check the thermal stability of modified cellulose. Estimation of cellulose phosphate was done by Potentiometry. The modified cellulose composites with Poly Lactic Acid (PLA) were obtained by using a melt blending technique. The composites were analyzed for viscoelastic/stiffness properties using Dynamic mechanical analyzer (DMA). The composites were found to exhibit horizontal burn (HB) flammability ratings. Additionally, to study the interfacial and dispersion properties of nano fibrillated cellulose in PLA two thermally stable fluorescent tagged celluloses with amino-methyl Coumarin and Fluoresceinamine (FA) dyes in PLA were synthesized. The Amino methyl Coumarin tagged cellulose showed good thermal stability even after blending with PLA and showed absorbance in UV-Visible Spectrophotometer; the FA tagged cellulose was thermally stable before blending with PLA but showed reduced quantum yield once it was blended in PLA.

History

Publisher

American University

Notes

Degree awarded: M.S. Chemistry. American University

Handle

http://hdl.handle.net/1961/14051

Usage metrics

    Theses and Dissertations

    Categories

    No categories selected

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC