The Effects of Additives on the Biodegradation of Polycaprolactone Composites

Cesur, Serap

doi:10.1007/s10924-017-1029-y

Cited by 15 publications

(13 citation statements)

References 43 publications

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“…Generally, the incorporation of fillers can accelerate the rate of biodegradation, with the degree of water absorption and micro-channeling into the bulk matrix being the proposed controlling factors. , However, not until very recently (2018) has there been consideration for the impact of functional additives on the biodegradation of biopolymers. Only a few studies have considered the biodegradation of biopolymers with manufacturing additives such as plasticizers , and chain extenders. , Mixed results were produced, and the controlling factors were often unclear. − Furthermore, only visual or weight loss data at various time points during the degradation period were recorded, thereby missing the opportunity to fully understand the effect of additives across the whole biodegradation process …”

Section: Introductionmentioning

confidence: 99%

“…8,17 However, not until very recently (2018) has there been consideration for the impact of functional additives on the biodegradation of biopolymers. Only a few studies have considered the biodegradation of biopolymers with manufacturing additives such as plasticizers 18,19 and chain extenders. 19,20 Mixed results were produced, and the controlling factors were often unclear.…”

Section: ■ Introductionmentioning

confidence: 99%

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Effect of Toxic Phthalate-Based Plasticizer on the Biodegradability of Polyhydroxyalkanoate

Chan

Lyons

Dennis

et al. 2022

Environ. Sci. Technol.

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While new biodegradable materials are being rapidly introduced to address plastic pollution, their end-of-life impacts remain unclear. Biodegradable plastics typically comprise a biopolymer matrix with functional additives and/or solid fillers, which may be toxic. Here, using an established method for continuous biodegradation monitoring, we investigated the impact of a commonly used plasticizer, dibutyl phthalate (DBP), on the biodegradation of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) in soil. The presence of DBP delayed the initial stage of PHBV biodegradation but then accelerated subsequent rates of biodegradation. Furthermore, it led to significant increases in total bacterial and fungal biomass and altered the composition of microbial communities with significant increases in the relative abundances of Thauera (gammaproteobacterial) and Mucor circinelloides (fungal) populations. It is proposed, with evidence from biodegradation behavior and microbial analysis, that the presence of DBP likely stimulated a microbial community shift, introduced higher proportions of more readily degradable amorphous regions from the plasticizing effect, and facilitated access to the bulk polymer matrix for microorganisms or at least their associated enzymes. These effects in combination overcame the initial inhibition effect of the DBP and resulted in a net increase in the rate of biodegradation of PHBV.

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Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Effect of Toxic Phthalate-Based Plasticizer on the Biodegradability of Polyhydroxyalkanoate

Chan

Lyons

Dennis

et al. 2022

Environ. Sci. Technol.

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“…Such an extreme inconsistency is hard to explain, especially since some important details of the material parameters or the soil environment used were not always comprehensively stated in all the studies (Innocenti, 2005). Generally, the molecular weight (M w ) of the polymer appears to play an important role in the PCL biodegradation (Cesur, 2018).…”

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 physical, chemical properties and final performances (thermal stability, mechanical property, biodegradability, transparency, gas barrier property, etc.) of polymeric materials are influenced substantially by the crystallization kinetics (the crystallization temperature, crystallization rate, degree of crystallinity, and so on) . So control over the crystallization kinetics is a way to tailor physical, chemical properties and final performances of polymeric materials.…”

Section: Introductionmentioning

confidence: 99%

“…of polymeric materials are influenced substantially by the crystallization kinetics (the crystallization temperature, crystallization rate, degree of crystallinity, and so on). [5][6][7][8][9][10] So control over the crystallization kinetics is a way to tailor physical, chemical properties and final performances of polymeric materials. Depending on the molecular weight, degree of crystallinity and crystallization conditions, the PCL shows different mechanical properties (eg, tensile strength, modulus and elongation at break).…”

Section: Introductionmentioning

confidence: 99%

Crystallization behavior and physical property of poly( ε ‐caprolactone) tailored by a biocompatible linear diamide nucleating agent

Tang

Wang

Yang

et al. 2019

Polymer Crystallization

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An organic diamide nucleating agent [EBH, N,N'−ethylenebis (12 − hydroxystearamide)] with eco‐friendliness was incorporated into the poly(ε‐caprolactone) (PCL) to prepare a biocomposite. The differential scanning calorimetry results indicated that the crystallization temperature, crystallization rate and degree of crystallinity increased, and the crystallization time shortened for the PCL upon incorporation of the EBH. The crystal size decreased and crystal density increased with addition of the EBH. These evidences all showed that the EBH is an effective nucleating agent. Thermal stability of the PCL was enhanced substantially and mechanical property of the PCL was also improved. Mechanisms on enhanced thermal stability and improved mechanical property of the PCL tailored by the EBH were proposed and discussed.

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The Effects of Additives on the Biodegradation of Polycaprolactone Composites

Cited by 15 publications

References 43 publications

Effect of Toxic Phthalate-Based Plasticizer on the Biodegradability of Polyhydroxyalkanoate

Effect of Toxic Phthalate-Based Plasticizer on the Biodegradability of Polyhydroxyalkanoate

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

Crystallization behavior and physical property of poly( ε ‐caprolactone) tailored by a biocompatible linear diamide nucleating agent

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