Enhancing the integration of bentonite clay with polycaprolactone by intercalation with a cationic surfactant: effects on clay orientation and composite tensile properties

Rojas, Patricia C. Rivas; Ollier, Romina P.; Álvarez, Vera A.; Huck‐Iriart, Cristián

doi:10.1007/s10853-020-05603-5

Cited by 10 publications

(20 citation statements)

References 61 publications

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“…The interlayer distance (d 001 ) of bent and bCBK was calculated by X‐ray diffractometry in a previous work 18 . The equilibrium water absorption (WAeq) decreased 36.6% and the d 001 increased 38.5% after the modification of bentonite with CBK.…”

Section: Resultsmentioning

confidence: 99%

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Improved creep performance of melt‐extruded polycaprolactone/organo‐bentonite nanocomposites

Ollier

Casado

Nicolini

et al. 2021

J of Applied Polymer Sci

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In this work, biodegradable nanocomposites based on polycaprolactone reinforced with pristine and organo‐modified bentonites are prepared by melt extrusion. Bentonite is exchanged with benzalkonium chloride (CBK) in a pilot plant scale reactor. The influence of clay type and loading on morphology, rheology, mechanical properties, and creep performance of the resulting materials is analyzed. Besides, several theoretical models then applied to experimental creep data and master curves are used to relate time and temperature with the compliance of the materials. The morphology characterization of the nanocomposites show that the organo‐modification of the clay greatly improves its dispersion in the polymer matrix. As a consequence, it is demonstrated that reinforcement of PCL with 3 wt% loading of organoclay produces the strongest improvement in creep resistance. The instantaneous creep strain and the experimental creep rate decrease more than 9% and 27%, respectively, in the range of temperatures analyzed. Moreover, the experimental values are used to adequately fit theoretical creep models for different clay loadings. On the other hand, the material with optimal creep behavior also shows the greatest improvements in tensile mechanical properties.

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Section: Resultsmentioning

confidence: 99%

“…The modification was carried out in a pilot scale reactor with a capacity of 10 L according to a recently optimized procedure developed by our research group 18 . Initially, 6 L of distilled water were introduced and heated at 80°C.…”

Section: Methodsmentioning

confidence: 99%

Improved creep performance of melt‐extruded polycaprolactone/organo‐bentonite nanocomposites

Ollier

Casado

Nicolini

et al. 2021

J of Applied Polymer Sci

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“…Slaný et al [28] investigated the effect of chain length on the arrangement of surfactants confined in montmorillonite interlayers using infrared spectroscopy in the mid-IR and near-IR regions and XRD and reported that the alkyl chain length has significant effect on the arrangement of the intercalated cations. The layer spacing, adsorption capacity, and thermal stability of OMB are directly proportional to the length of surfactant alkyl chain of surfactants [29][30][31]. Therefore, OMB with different structures and properties can be synthesized by using different surfactants according to various purposes and needs and is simpler and less expensive to prepare than anionic clays such as hydrotalcites [32].…”

Section: Introductionmentioning

confidence: 99%

Phenol Adsorption Mechanism of Organically Modified Bentonite and Its Microstructural Changes

Qiu

et al. 2022

Sustainability

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Bentonite was modified with cetyltrimethylammonium bromide (CTAB). The organically modified bentonite (OMB) was used to remove phenol from aqueous solution, the microstructural changes were characterized by X-ray diffraction (XRD) and scanning electronic microscopy (SEM), and phenol adsorption kinetic was obtained using batch adsorption test results. The results indicated that the rate of adsorption of phenol onto the OMB was positively correlated with the initial concentration, and the maximum adsorption capacity was found to be 10.1 mg/g at the initial concentration of 150 mg/L at 25 °C and pH 10. The investigations of adsorption kinetics models showed that the adsorption kinetic was better reflected by the pseudo-second-order kinetic model. Furthermore, the properties of the OMB samples with different adsorption times were obtained by SEM and XRD. The statistic analysis revealed that the pore diameter of the OMB samples decreased with the increasing adsorption time and gradually reached equilibrium.

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“…The latter method has been found to be more convenient and cost-effective. Several nanofillers have been tested for this purpose, including carbon nanotubes, graphene, nickel oxide, quantum dots, silica, layered double hydroxide (LDH), and clays …”

Section: Introductionmentioning

confidence: 99%

“…Several nanofillers have been tested for this purpose, including carbon nanotubes, 7 graphene, 8 nickel oxide, quantum dots, 9 silica, 10 layered double hydroxide (LDH), 11 and clays. 12 …”

Section: Introductionmentioning

confidence: 99%

Biodegradable Poly(Butylene Succinate) Nanocomposites Based on Dimeric Surfactant Organomodified Clays with Enhanced Water Vapor Barrier and Mechanical Properties

et al. 2022

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Biocomposites based on biodegradable polybutylene succinate (PBS) and organomodified clays (OMt) were prepared by melt blending process. The OMt nanofillers were obtained by ion exchange reaction between sodium montmorillonite (Mt) and gemini surfactants bearing 4-decyloxyphenylacetamide hydrophobic chains and ethylene or hexylene spacer. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and rheological measurement results showed that the investigated hybrids present a uniform dispersion with an exfoliation of clay into the PBS matrix, particularly for short spacer surfactant based composites. The effect of organoclay loading and composition on the thermal, mechanical, and barrier properties was also investigated. High clay loading and long gemini surfactant spacer lead to substantial improvement of Young modulus values by 21%, while low clay content induces a reduction of the hybrid’s crystallinity due to strong OMt–PBS interactions. Compared to that of the neat PBS film, a significant reduction of the water vapor permeability (WVP) by 28% was obtained by adding only 3 wt % of PBS/OMt (2) which opens up prospects for this material in the field of food packaging. This study shows that gemini surfactant-modified organoclays can be used as effective nanofillers in a PBS matrix to access to value-added nanocomposites.

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Enhancing the integration of bentonite clay with polycaprolactone by intercalation with a cationic surfactant: effects on clay orientation and composite tensile properties

Cited by 10 publications

References 61 publications

Improved creep performance of melt‐extruded polycaprolactone/organo‐bentonite nanocomposites

Improved creep performance of melt‐extruded polycaprolactone/organo‐bentonite nanocomposites

Phenol Adsorption Mechanism of Organically Modified Bentonite and Its Microstructural Changes

Biodegradable Poly(Butylene Succinate) Nanocomposites Based on Dimeric Surfactant Organomodified Clays with Enhanced Water Vapor Barrier and Mechanical Properties

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