Tailoring an Effective Interface between Nanocellulose and the Epoxidized Linseed Oil Network through Functionalization

Abstract

Sustainable nanocomposite materials based on different functionalized nanocellulose (NC) structures embedded in epoxidized linseed oil (ELO) were developed as foundation toward a greener approach for anticorrosive coating evolution. The work leans on functionalization with (3-aminopropyl) triethoxysilane (APTS), (3-glycidyloxypropyl)trimethoxysilane (GPTS), and vanillin (V) of NC structures isolated from plum seed shells, evaluated as potential reinforcing agents for the increase of thermomechanical properties and water resistance of epoxy nanocomposites from renewable resources. The successful surface modification was confirmed from the deconvolution of X-ray photoelectron spectra for C 1s and correlated with Fourier transform infrared (FTIR) data. The secondary peaks assigned to C−O−Si at 285.9 eV and C−N at 286 eV were observed with the decrease of the C/O atomic ratio. Compatibility and efficient interface formation between the functionalized NC and the biobased epoxy network from linseed oil were translated as decreased values for the surface energy of bio-nanocomposites and better dispersion imaged through scanning electron microscopy (SEM). Thus, the storage modulus of the ELO network reinforced with only 1% APTS-functionalized NC structures reached 5 GPa, an almost 20% increase compared with that of the neat matrix. Mechanical tests were applied to assess an increase of 116% in compressive strength for the addition of 5 wt % NCA to the bioepoxy matrix.

Broadening the coating applications of sustainable materials by reinforcing epoxidized corn oil with single-walled carbon nanotubes

“…Epoxidized corn oil (ECO) was obtained by our team through the epoxidation of a commercial corn oil, using literature reported experimental protocol involving in situ generation of peracetic acid (Balanuca et al 2017 ; Necolau et al 2023 , 2022 ). The epoxy equivalent for ECO was calculated by using Eq.…”

“…In the discussed context, the current research deals with the property improvement of the sustainable and hydrophobic polymeric network of the epoxidized corn oil (ECO) through the incorporation of some optimized high-performance nano-reinforcing agents as amide- and carboxyl-functionalized single-walled carbon nanotubes (SW) that are well known for their superior thermal and mechanical features. Thus, the main objective of the present study was the development of different ECO-SW polymer nanomaterials as promising sustainable materials, through a thermal curing strategy using an efficient ecofriendly crosslinking agent, citric acid (CA) (Necolau et al 2023 ; Sahoo et al 2018 ). The epoxy curing reaction in the presence of the employed carbon nano-species was monitored, and the obtained materials were investigated regarding their structural, thermal, and thermo-mechanical characteristics.…”

Influence of Partially Carboxylated Powdered Lignocellulose from Oat Straw on Technological and Strength Properties of Water-Swelling Rubber

“…The ability of cellulose to absorb moisture well [14][15][16][17][18] allows for the use of lignocellulose raw materials as a filler in the creation of water-swelling polymer materials (PM), which have found application as sealing elements in building structures and sleeves for casing packers used in the oil and gas industry [19][20][21][22][23][24].…”