Composites made from a soybean oil biopolyurethane and cellulose nanocrystals

Mucci, Verónica Luján; Ivdre, Aiga; Buffa, Juan Manuel; Cābulis, Uģis; Stefani, Pablo Marcelo; Aranguren, Mirta I.

doi:10.1002/pen.24539

Cited by 15 publications

(14 citation statements)

References 47 publications

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“…As CNF loading increased, the nanocomposite film approached the percolation threshold (agglomeration), lowered the area of physical interaction, and resulted in a stress deficiency transfer. This area of heterogeneous and agglomeration has become a stress concentrator and a failure point for nanomaterials [ 39 ]. Gao et al [ 37 ] also reported a similar observation.…”

Section: Resultsmentioning

confidence: 99%

Effect of Cellulose Nanofibrils on the Properties of Jatropha Oil-Based Waterborne Polyurethane Nanocomposite Film

et al. 2021

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The objective of this work was to study the influence of cellulose nanofibrils (CNF) on the physical, mechanical, and thermal properties of Jatropha oil-based waterborne polyurethane (WBPU) nanocomposite films. The polyol to produce polyurethane was synthesized from crude Jatropha oil through epoxidation and ring-opening method. The chain extender, 1,6-hexanediol, was used to improve film elasticity by 0.1, 0.25, and 0.5 wt.% of CNF loading was incorporated to enhance film performance. Mechanical performance was studied using a universal test machine as specified in ASTM D638-03 Type V and was achieved by 0.18 MPa at 0.5 wt.% of CNF. Thermal gravimetric analysis (TGA) was performed to measure the temperature of degradation and the chemical crosslinking and film morphology were studied using Fourier-transform infrared spectroscopy (FTIR) and field emission scanning electron microscopy (FESEM). The results showed that when the CNF was incorporated, it was found to enhance the nanocomposite film, in particular its mechanical and thermal properties supported by morphology. Nanocomposite film with 0.5 wt.% of CNF showed the highest improvement in terms of tensile strength, Young’s modulus, and thermal degradation. Although the contact angle decreases as the CNF content increases, the effect on the water absorption of the film was found to be relatively small (<3.5%). The difference between the neat WPBU and the highest CNF loading film was not more than 1%, even after 5 days of being immersed in water.

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Section: Resultsmentioning

confidence: 99%

Effect of Cellulose Nanofibrils on the Properties of Jatropha Oil-Based Waterborne Polyurethane Nanocomposite Film

et al. 2021

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“…In effect, formulations which have a highly cross‐linked nature will also have a higher weight percent of isocyanate precursors. However, the main drawback of this strategy is that most of the research that has been performed in the development of bio‐based polyurethane precursors is associated to the polyol component 19–21 . Hence, a material with a higher renewable content will be difficult to attain because the main component of the RPUF is the isocyanate.…”

Section: Introductionmentioning

confidence: 99%

“…However, the main drawback of this strategy is that most of the research that has been performed in the development of bio-based polyurethane precursors is associated to the polyol component. [19][20][21] Hence, a material with a higher renewable content will be difficult to attain because the main component of the RPUF is the isocyanate. To surmount this issue, another strategy can be based on the use of nanotechnology.…”

Section: Introductionmentioning

confidence: 99%

Nanostructured rigid polyurethane foams with improved specific thermo‐mechanical properties using bacterial nanocellulose as a hard segment

Benavides

Armanasco

Cerrutti

et al. 2021

J of Applied Polymer Sci

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Rigid polyurethane foams (RPUFs) were synthesized with bacterial nanocellulose (BNC) at concentrations of up to 0.5 wt% using two insertion routes based on its reaction with the isocyanate precursor (ISO route) and the formation of a colloidal dispersion in the polyol precursor (POL route). The results indicated that, for BNC concentrations of only 0.1 wt%, drastic improvements of the specific elastic compressive modulus (+244.2%) and strength (+77.5%) were measured for foams with apparent density of 46.4+/− 4.7 Kg.m−3. The chemical reaction of BNC with the precursor was corroborated through the measurement of the isocyanate number and FTIR analysis. The BNC caused a significant nucleation effect, decreasing the cell size up to 39.7%. Differential scanning calorimetry analysis revealed that the BNC had a strong effect on post‐cure enthalpy, particularly for the POL route. Dynamical mechanical thermal analysis under flexural conditions proved that, regardless of BNC concentration, the incorporation of BNC caused anisotropy and that the ISO route contributed to an enhanced damping factor at high temperatures. These results prove that the ISO route is a key aspect to achieve foamed nanocomposites with improved specific mechanical properties.

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“…Nanotechnological utilization of cellulose broadens its utility in the form of fibers [ 1,3,24,25 ] as well as crystals [ 26–28 ] for several sophisticated applications. Recently, CNFs and silica‐based composite aerogels [ 29–31 ] have gained much attention from researchers due to several unique features of CNFs, such as their ultra‐lightweight, high elastic modulus, and low thermal expansion.…”

Section: Introductionmentioning

confidence: 99%

The role of rheological premonitory of hydrogels based on cellulose nanofibers and polymethylsilsesquioxane on the physical properties of corresponding aerogels

Gupta

Pandey

Gaikwad

et al. 2021

Polymer Engineering & Sci

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Cellulose nanofibers (CNFs) and polymethylsilsesquioxane (PMSQ)‐based aerogels (CNF/PMSQ aerogels) have been prepared by the sol–gel method. The extraction of CNFs from pine wood and formation of composite aerogel with PMSQ were confirmed by Fourier transform infrared spectroscopic and field emission scanning electron microscopic analyses. The rheological premonitory of hydrogel has been performed to predict the physical properties (i.e., density, mechanical properties) of aerogels. The variation in the precursor (methyltrimethoxysilane [MTMS]) and urea content has shown a considerable effect on the storage modulus and phase angle of the hydrogel. The variation in urea content showed a 4–8% increment in the density with a pronounced difference in aerogel's morphology. The increment in the MTMS concentration demonstrated a 10–20% enhancement in density with a minor change in morphology. The van Gurp–Palmen plot of hydrogel has represented a relationship between complex modulus and phase angle. This study establishes that hydrogel's premonitory analysis could compare aerogel's physical properties without going through drying and further analysis.

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Composites made from a soybean oil biopolyurethane and cellulose nanocrystals

Cited by 15 publications

References 47 publications

Effect of Cellulose Nanofibrils on the Properties of Jatropha Oil-Based Waterborne Polyurethane Nanocomposite Film

Effect of Cellulose Nanofibrils on the Properties of Jatropha Oil-Based Waterborne Polyurethane Nanocomposite Film

Nanostructured rigid polyurethane foams with improved specific thermo‐mechanical properties using bacterial nanocellulose as a hard segment

The role of rheological premonitory of hydrogels based on cellulose nanofibers and polymethylsilsesquioxane on the physical properties of corresponding aerogels

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