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Chemical modification of soybean flour‐based adhesives using acetylated cellulose nanocrystals
Author(s) -
Eslah Farnaz,
Jonoobi Mehdi,
Faezipour Mehdi,
Ashori Alireza
Publication year - 2018
Publication title -
polymer composites
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.577
H-Index - 82
eISSN - 1548-0569
pISSN - 0272-8397
DOI - 10.1002/pc.24389
Subject(s) - adhesive , materials science , cellulose , scanning electron microscope , chemical modification , composite material , nuclear chemistry , morphology (biology) , chemical engineering , polymer chemistry , chemistry , layer (electronics) , biology , engineering , genetics
In this study, two types of new bioadhesives formulated from abundant and renewable soybean flour (SF), acetylated soybean flour based adhesive (ASF), and soybean flour‐based adhesive, were modified with acetylated cellulose nanocrystal (ACNC). The apparent viscosity and morphology of the adhesive formulations were characterized. The chemical composition of the formulations was evaluated by FT‐IR spectroscopy and the effect of polyethilenimine (PEI) on the formulations was investigated using the proton nuclear magnetic resonance ( 1 H NMR) spectra. Moreover, water resistance of produced plywood composites bonded with the bioadhesives was measured. The results of FT‐IR and 1 H NMR confirmed that chemical modifications of the SF occurred. The scanning electron microscopy (SEM) images showed less holes and cracks on the cross section of the ASF/PEI/NaOH and SF/PEI/NaOH/ACNC formulations. The results showed that the plywood specimens bonded with formulations of the ASF/PEI/NaOH (with a dry weight ratio of ASF/PEI: 5/1 and 6/1), and SF/PEI/NaOH/ACNC had good resistance to water. POLYM. COMPOS., 39:3618–3625, 2018. © 2017 Society of Plastics Engineers