The influence of soil and landfill leachate microorganisms in the degradation of PVC/PCL films cast from DMF

Campos, Adriana de; Marconato, José Carlos; Martins-Franchetti, S. M.

doi:10.1590/s0104-14282012005000029

Cited by 17 publications

(7 citation statements)

References 32 publications

(43 reference statements)

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“…The residual KOH was titrated with 0.1 M HCl standardized solution. Details of the Brazilian standard [28] are described in previous papers [29, 30].…”

Section: Methodsmentioning

confidence: 99%

Properties of thermoplastic starch and TPS/polycaprolactone blend reinforced with sisal whiskers using extrusion processing

Campos¹,

Teodoro²,

Teixeira³

et al. 2012

Polymer Engineering & Sci

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Sisal whiskers (SW) were prepared by acid hydrolysis for subsequent evaluation as reinforcing material for biodegradable matrices of thermoplastic starch (TPS) and TPS/polycaprolactone (TPS/PCL) blends. The acid hydrolyzed SW had dimensions of 5 6 2 nm in diameter and 210 6 60 nm in length and 78% crystallinity. The nanocomposite blends consisted of whisker contents of 5 and 10 wt% and were coextruded with either TPS or TPS/PCL which formed the matrix material. The influence of SW on the morphology, crystallinity, thermal properties, mechanical behavior, structural, and biodegradation of TPS and TPS/PCL matrices were investigated. The lower SW content of 5 wt% dispersed and interacted well with both matrices. The introduction of PCL in the TPS matrix leads to an increased crystallinity and there was evidence that the carbonyl groups of PCL interacted with the OH groups on the surface of the whiskers. Addition of PCL decreased the whisker/whisker interaction over TPS alone, favoring the dispersion of the whiskers in the matrix and, consequently, the reinforcement effect was more pronounced in TPS/PCL blends than in the pure TPS matrix. The addition of the whiskers as reinforcement increased the biodegradability of TPS and TPS/ PCL matrices.

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“…The residual KOH was titrated with 0.1 M HCl standardized solution. Details of the Brazilian standard [28] are described in previous papers [29, 30].…”

Section: Methodsmentioning

confidence: 99%

Properties of thermoplastic starch and TPS/polycaprolactone blend reinforced with sisal whiskers using extrusion processing

Campos¹,

Teodoro²,

Teixeira³

et al. 2012

Polymer Engineering & Sci

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show abstract

“…The band at 1463 cm –1 was attributed to the angular deformation of C–H while the bands at 1068 and 1045 cm –1 were attributed to the axial deformation of O–C–C. 62 However, because of the limit of the AFM-IR laser resource, the band at 746 cm –1 , assigned to the axial deformation of C–Cl is lacking.…”

Section: Resultsmentioning

confidence: 99%

Graphene Oxide-Induced Interfacial Transcrystallization of Single-Fiber Milkweed/Polycaprolactone/Polyvinylchloride Composites

et al. 2020

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Understanding the interfacial crystallization is crucial for semi-crystalline polymer/natural fiber composites because it links to the final properties. This work reports, for the first time, the interfacial crystallization of a miscible blend between polycaprolactone (PCL) and polyvinylchloride (PVC) with milkweed fibers. We have first described the morphology of the fibers and the chemical composition of waxes covered on its surface. Our findings show that the transcrystallization (TC) layer of PCL/PVC could appear at the interface by simply coating with a layer of graphene oxide (GO) on the milkweed fiber. In our study, atomic force microscopy–infrared spectroscopy analysis shows that the crystallinity of the blends is higher at the vicinity of the interface compared to that in the bulk. The kinetic of the interfacial crystallization in terms of spherulite morphology and crystal growth rates at the nanoscale is examined. X-ray photoelectron spectroscopy and high-resolution transmission electron microscopy were used to analyze the prepared GO and evaluate its relationship with the interfacial crystallization behavior of the blends.

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“…The use of PCL materials in the food-packaging industry and agriculture is very advantageous due to their resistance to water and oil, non-toxicity, and biodegradability (Funabashi et al, 2009;Rudnik, 2013). Therefore, many attempts have been made to combine PCL with other polymers to modify its properties and degradation in the environment (Bastioli, 1998;Averous et al, 2000;Wang et al, 2003;Campos et al, 2012;Mittal et al, 2015;Ostafinska et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Structure Characterization and Biodegradation Rate of Poly(ε-caprolactone)/Starch Blends

et al. 2020

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The present paper focuses on the effects of blending poly (ε-caprolactone) (PCL) with thermoplastic starch (TPS) on the final biodegradation rate of PCL/TPS blends, emphasizing the type of environment in which biodegradation takes place. The blends were prepared by melt-mixing the components before a two-step processing procedure, which strongly affects the degree of plasticization and therefore the final material morphology, as was detailed in the previous work, was used for the thermoplastic starch. The concentration row of pure PCL over PCL/TPS blends to pure TPS was analyzed for biodegradation in two different environments (compost and soil), as well as from a morphological, thermomechanical, rheological, and mechanical point of view. The morphology of all the samples was studied before and after biodegradation. The biodegradation rate of the materials was expressed as the percentage of carbon mineralization, and significant changes, especially after exposure in soil, were recorded. The crystallinity of the measured samples indicated that the addition of thermoplastic starch has a negligible effect on PCL-crystallization. The blend with 70% of TPS and a co-continuous morphology demonstrated very fast biodegradation, with the initial rate almost identical to pure TPS in both environments while the 30% TPS blend exhibited particle morphology of the starch phase in the PCL matrix, which probably resulted in a dominant effect of the matrix on the biodegradation course. Moreover, some molecular interaction between PCL and TPS, as well as differences in flow and mechanical behavior of the blends, was determined.

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The influence of soil and landfill leachate microorganisms in the degradation of PVC/PCL films cast from DMF

Cited by 17 publications

References 32 publications

Properties of thermoplastic starch and TPS/polycaprolactone blend reinforced with sisal whiskers using extrusion processing

Properties of thermoplastic starch and TPS/polycaprolactone blend reinforced with sisal whiskers using extrusion processing

Graphene Oxide-Induced Interfacial Transcrystallization of Single-Fiber Milkweed/Polycaprolactone/Polyvinylchloride Composites

Structure Characterization and Biodegradation Rate of Poly(ε-caprolactone)/Starch Blends

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