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Polymer Bulletin
Erschienen in: Polymer Bulletin 7/2019

13.10.2018 | Original Paper

Chemical compatibility of lactic acid-grafted starch nanocrystals (SNCs) with polylactic acid (PLA)

verfasst von: Somayeh Sharafi Zamir, Mohammad Reza Frouzanmehr, Malladi Nagalakshmaiah, Abdellah Ajji, Mathieu Robert, Said Elkoun

Erschienen in: Polymer Bulletin | Ausgabe 7/2019

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Abstract

In this work, starch nanocrystals were chemically grafted with lactic acid using esterification reaction and its compatibility with poly (lactic acid) (PLA). Initially, ungrafted and grafted starch nanocrystals were characterized to understand the crystalline, functional, thermal and morphological properties by means of wide-angle X-ray scattering, Fourier transform infrared, X-ray photoelectron spectroscopy, thermogravimetric analysis and transmission electron microscopy, respectively. The results confirmed that the surface of starch nanocrystals was successfully modified with lactic acid. Subsequently, grafted starch nanocrystals were blended, in solution, with PLA at different concentrations ranging from 5 to 30 wt%. Then, starch nanocrystals/PLA films were prepared using solvent casting technique. The influence of the grafted starch nanocrystals, at different concentrations, on thermal, mechanical and morphological properties of resulting PLA nanocomposites was investigated using differential scanning calorimetry, thermogravimetric analysis, dynamic mechanical analysis and scanning electron microscopy, respectively. The results revealed that the interfacial adhesion and the compatibility between starch nanocrystals and PLA matrix were substantially improved by the grafting. This improved compatibility between grafted starch nanocrystals and PLA led to a significant increase in PLA nanocomposites crystallinity as compared to neat PLA.
Vorheriger Artikel Efficient polymeric phosphorus flame retardant: flame retardancy, thermal property, and physical property on polylactide
Nächster Artikel Mechanism of ε-caprolactone polymerization in the presence of alkali metal salts: investigation of initiation course and determination of polymers structure by MALDI-TOF mass spectrometry

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Metadaten
Titel
Chemical compatibility of lactic acid-grafted starch nanocrystals (SNCs) with polylactic acid (PLA)
verfasst von
Somayeh Sharafi Zamir
Mohammad Reza Frouzanmehr
Malladi Nagalakshmaiah
Abdellah Ajji
Mathieu Robert
Said Elkoun
Publikationsdatum
13.10.2018
Verlag
Springer Berlin Heidelberg
Erschienen in
Polymer Bulletin / Ausgabe 7/2019
Print ISSN: 0170-0839
Elektronische ISSN: 1436-2449
DOI
https://doi.org/10.1007/s00289-018-2548-y

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