10.1021/acssuschemeng.8b00330.s001
Xinchen Ye
Xinchen
Ye
Kristina Junel
Kristina
Junel
Mikael Gällstedt
Mikael
Gällstedt
Maud Langton
Maud
Langton
Xin-Feng Wei
Xin-Feng
Wei
Christofer Lendel
Christofer
Lendel
Mikael S. Hedenqvist
Mikael S.
Hedenqvist
Protein/Protein Nanocomposite Based on Whey Protein
Nanofibrils in a Whey Protein Matrix
American Chemical Society
2018
hydrogen-bonded β- sheets
Whey Protein Nanofibrils
extent exfoliation
nanocomposite films
β- sheets
nonfibrillar protein matrix
content
Tensile tests
glycerol-plasticized films
protein film
glycerol distribution
X-ray diffraction
undulation
Whey Protein Matrix
PNF material
protein nanofibrils
2018-03-15 00:00:00
Journal contribution
https://acs.figshare.com/articles/journal_contribution/Protein_Protein_Nanocomposite_Based_on_Whey_Protein_Nanofibrils_in_a_Whey_Protein_Matrix/6019925
This article describes
nanocomposite films with separately grown
protein nanofibrils (PNFs) in a nonfibrillar protein matrix from the
same protein starting material (whey). Tensile tests on the glycerol-plasticized
films indicate an increased elastic modulus and a decreased extensibility
with increasing content of PNFs, although the films are still ductile
at the maximum PNF content (15 wt %). Infrared spectroscopy confirms
that the strongly hydrogen-bonded β-sheets in the PNFs are retained
in the composites. The films appear with a PNF-induced undulated upper
surface. It is shown that micrometer-scale spatial variations in the
glycerol distribution are not the cause of these undulations. Instead,
the undulations seem to be a feature of the PNF material itself. It
was also shown that, apart from plasticizing the protein film, the
presence of glycerol seemed to favor to some extent exfoliation of
stacked β-sheets in the proteins, as revealed by X-ray diffraction.