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Enhancement of poly(vinyl alcohol) using delaminated layered double hydroxide for the formulation of mechanically strong nanocomposite hydrogel
Author(s) -
Sebri Nor Jannah Mohd,
Abdul Latip Ahmad Faiz,
Adnan Rohana,
Hussin Mohd Hazwan,
Kobayashi Takaomi
Publication year - 2020
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.48637
Subject(s) - vinyl alcohol , materials science , nanocomposite , layered double hydroxides , ultimate tensile strength , intercalation (chemistry) , dynamic mechanical analysis , chemical engineering , composite material , hydroxide , fourier transform infrared spectroscopy , exfoliation joint , scanning electron microscope , polymer chemistry , polymer , chemistry , organic chemistry , graphene , nanotechnology , engineering
In this work, a new type of nanocomposite hydrogel (NCH) has been prepared by crosslinking poly(vinyl alcohol) (PVA) with delaminated layered double hydroxides (LDHs). The LDH was first intercalated with sodium dodecyl sulfate to facilitate delamination. The intercalated LDH was synthesized via coprecipitation followed by subsequent hydrothermal treatment and delamination in dimethyl sulfoxide. The mechanical properties of PVA–NCH with 0.1 wt % LDH were significantly enhanced. The tensile strength of PVA–NCH containing 0.1 wt % LDH was remarkably increased by threefold, while the value of Young's modulus was recorded to be the highest compared to other ratios. The morphologies and microstructures of the PVA–NCH were further investigated by scanning electron microscopy, transmission electron microscopy (TEM), Fourier transform infrared, and X‐ray diffraction. TEM image showed the LDH was delaminated into single nanosheets. It was demonstrated that the delaminated LDH played an important role in increasing physical crosslinking with PVA macromolecules to form strong hydrogel through hydrogen bonding network. RESEARCH HIGHLIGHTS A fast and simple intercalation process of layered double hydroxides (LDHs) with dimethyl sulfoxide to delaminate the organically modified LDH at room temperature. Delaminated Mg 2 Al–LDH was used as a nanocrosslinker to produce mechanically strong poly(vinyl alcohol) nanocomposite hydrogel. Enhanced mechanical properties in terms of tensile strength and modulus of elasticity (Young's modulus) were observed with the addition of 0.1% sodium dodecyl sulfate–LDH. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137 , 48637.