Layered Double Hydroxides as Nano Additives in Poly(ϵ-caprolactone)

Manhique, Arao; Kaci, Mustapha; Leuteritz, Andreas; Madivate, Carvalho

doi:10.1080/15421406.2012.635925

Cited by 9 publications

(10 citation statements)

References 14 publications

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“…Commercial Mg-Al LDH was modified with stearic acid and SDBS and compounded with PCL. 36 The addition of both the modified LDHs did not impact the melting temperature of the PCL composites in a meaningful way. It did, however, change the crystallization of PCL.…”

Section: Crystallization Behaviormentioning

confidence: 90%

“…Clearly, through the addition of LDH, one can modify the properties of the composite material when compared to the parent polymer. 36 The measured crystallization and melting enthalpies of both SBDS and stearic acid modified Co-Al LDH/LDPE composites decreased with an increase in filler content, indicating reduction of LDPE chain mobility, which in turn hinders the formation of polymer crystal domains. This supports XRD findings that indicated good interaction between the LDH particles and matrix, leading to delamination/exfoliation.…”

Section: Crystallization Behaviormentioning

confidence: 94%

“…35 Further, the thermal degradation temperature of PNC was lower than pure PCL, possibly due to enhanced degradation caused by the OH groups present in the LDH structure or due to the earlier decomposition of LDH. 36 In consequence the thermal behavior of PNCs with LDH depend on the nature of the polymer, its general decomposition mechanism and the specific interaction with the LDH.…”

Section: Thermal Stabilitymentioning

confidence: 99%

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Tailoring materials for their need: Sustainable layered double hydroxide polymer composites

Oosthuizen

Jones

Naseem

et al. 2023

Journal of Polymer Science

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Layered double hydroxides (LDHs) are popular functional fillers increasingly used in composite materials. They can be designed via metal and anion selection as well as the specific processing method to prepare structures with desired functional properties. This makes LDHs suitable for many different applications, including as flame‐retardants, UV stabilizers, and anti‐microbial agents in polymer nanocomposites as well as a photo‐absorber in a solar cell. Here an overview of LDH synthesis and modification, composite preparation as well as characterization is given to highlight the unique ability for customization of LDH.

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Section: Crystallization Behaviormentioning

confidence: 90%

Section: Crystallization Behaviormentioning

confidence: 94%

Section: Thermal Stabilitymentioning

confidence: 99%

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Tailoring materials for their need: Sustainable layered double hydroxide polymer composites

Oosthuizen

Jones

Naseem

et al. 2023

Journal of Polymer Science

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“…Generally LDHs based polymer composites are prepared by three main techniques that is melt blending, solution intercalation and in situ polymerization. LDH‐PCL composites have specifically been prepared by high energy ball milling (HEBM), melt‐blending, and electrospinning . Research to date has focused mainly on LDH‐PCL composites for drug delivery aspects, morphology, and dispersion of systems .…”

Section: Introductionmentioning

confidence: 99%

“…LDH‐PCL composites have specifically been prepared by high energy ball milling (HEBM), melt‐blending, and electrospinning . Research to date has focused mainly on LDH‐PCL composites for drug delivery aspects, morphology, and dispersion of systems . Sorrentino et al reported mechanical properties (modulus, stress at yield point, strain at break point, and stress at break value) improvement in LDH‐PCL composite up to 2.8 wt %; however, the polymer suffered molecular weight reduction.…”

Section: Introductionmentioning

confidence: 99%

Anomalous impact strength for layered double hydroxide‐palmitate/poly(ε‐caprolactone) nanocomposites

Moyo

Makhado

Ray

2014

J of Applied Polymer Sci

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Inherent physical properties and commercial availability makes poly(ε‐caprolactone) (PCL) very attractive as a potential substitute material for nondegradable polymers for commodity applications. However, a balance of toughness and stiffness is needed in order to transfer this potential into reality, particularly for short‐term packaging applications. In this context, layered double hydroxide modified with palmitic acid (LDH‐palmitate), was used as a nanoadditive to enhance the mechanical properties of PCL. Composites from PCL were prepared by melt‐blending with LDH‐palmitate loadings in the 1−10 wt % range. Scanning electron microscopy, transmission electron microscopy, and X‐ray diffraction were used to study the structure and morphology of the composites. The results showed homogeneous dispersion of clay particles in composites, but the degree of stacking of clay platelets was related to the LDH‐palmitate loadings. Charpy impact test measurements revealed an anomalous toughness improvement in the case of composite containing 5 wt % LDH‐palmitate, attributed to a combination of microcavitation and changes in crystallite sizes in the composite. The addition of LDH‐palmitate improved the water vapor barrier permeation of neat PCL film. In summary, LDH‐palmitate was shown to have potential as a nanoadditive to obtain tougher LDH‐PCL composite with improved barrier property. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 41109.

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Molecular dynamics of poly(ε‐caprolactone)/beidellite organoclay bionanocomposites obtained by in‐situ polymerization highlighted by dielectric relaxation spectroscopy

Ezzeddine,

Ilsouk,

Arous

et al. 2024

Polymer Engineering & Sci

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Nanocomposites of poly(ε‐caprolactone) (PCL) reinforced by an organomodified beidellite (BDT) with 3% of cetyltrimethylammonium bromide (CTAB) (labeled PCL/3CTA‐BDT) were prepared by varying the content of filler (1, 2, 3, and 5 wt%). Their molecular dynamics were investigated by broadband dielectric spectroscopy at temperatures ranging from 0 to 40°C and a frequency window from 10−1 to 106 Hz. Three relaxation processes were detected for unfilled PCL: electrode polarization (EP), the Maxwell–Wagner–Sillars (MWS) polarization, and the α‐relaxation. The incorporation of the filler induced the emergence of a fourth process at high frequency of dipolar origin labeled as interfacial polarization (IP). Fitting the data with the Havriliak–Negami model as well as a study of the relaxation time variation with temperature demonstrated the noncooperative nature of the IP process. Activation energy and dielectric strength values demonstrated that the PCL/3CTA‐BDT with 3 wt% of filler showed a higher quality of dispersion and better interfacial features compared to those with other filler contents (2 and 5 wt%). This work highlights the challenges of dielectric green nanocomposites used for capacitors (storage energy) and cable/wire insulation.Highlights The various samples were analyzed using broadband dielectric spectroscopy. Relaxation processes in pure matrix: EP, MWS, and α‐relaxation. Incorporation of the filler induced the emergence of interfacial polarization (IP). Noncooperative behavior of the IP process. 3 wt% loading showed a higher quality of dispersion and interfacial features.

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Layered Double Hydroxides as Nano Additives in Poly(ϵ-caprolactone)

Cited by 9 publications

References 14 publications

Tailoring materials for their need: Sustainable layered double hydroxide polymer composites

Tailoring materials for their need: Sustainable layered double hydroxide polymer composites

Anomalous impact strength for layered double hydroxide‐palmitate/poly(ε‐caprolactone) nanocomposites

Molecular dynamics of poly(ε‐caprolactone)/beidellite organoclay bionanocomposites obtained by in‐situ polymerization highlighted by dielectric relaxation spectroscopy

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