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Nanocomposite Films from Mango Kernel or Corn Starch with Starch Nanocrystals
Author(s) -
Oliveira Ana Vitória,
da Silva Ana Priscila Monteiro,
Barros Matheus O.,
de sá M. Souza Filho Men,
Rosa Morsyleide F.,
Azeredo Henriette M. C.
Publication year - 2018
Publication title -
starch ‐ stärke
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.62
H-Index - 82
eISSN - 1521-379X
pISSN - 0038-9056
DOI - 10.1002/star.201800028
Subject(s) - starch , corn starch , ultimate tensile strength , materials science , elongation , nanocomposite , opacity , composite material , chemistry , food science , physics , optics
Mango kernels are used for the first time as a source of both starch and starch nanocrystals (SNC) for bionanocomposite films. The starch yield was 38.5%, whereas the SNC yield (from starch) is more than 30%. Bionanocomposite films are produced from mango kernel starch (MKS) and 0–10 wt% SNC, and the corresponding films are also obtained from commercial corn starch. The addition of 5% SNC to MKS films increases their tensile strength and modulus in about 90% and 120% respectively, and reduces their water vapor permeability in about 15%. On the other hand, the film elongation has been reduced to half the one for the unfilled film, and the opacity has been increased. When compared to the corresponding corn starch films, mango kernel starch films exhibited higher overall tensile strength and elastic modulus, as well as increased opacity.