Synergistic interaction of treatment and blending on the stability of high‐density polyethylene

Jeyakumar, D.; Ganesan, Shanthi; Doble, Mukesh

doi:10.1002/app.35640

Cited by 7 publications

(5 citation statements)

References 43 publications

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“…This degradation can be enhanced by mild physico-chemical pretreatment including thermal or UV treatment [3]. The biodegradability of high density polyethylene has been enhanced by introducing additives to it, including starch and pro-oxidants [4,5].…”

Section: Introductionmentioning

confidence: 99%

Biodegradation of Starch Blended High Density Polyethylene using Marine Bacteria Associated with Biofilm Formation and its Isolation Characterization

Muthukumar¹

2014

J Microb Biochem Technol

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The biofouling and biodegradation of starch blended high density polyethylene (HDPE) was studied by immersing it in Bay of Bengal (India) for a period of six months. A positive correlation was observed amongst the various constituents in the biofilm. FTIR spectrum showed the formation of C-O stretching band and decrease in ester and keto carbonyl bands indicating biodegradation. 17% weight loss was observed, while the polymer surface turned hydrophilic. Twenty two bacterial strains were isolated from the biofilm and biochemically characterized. 16sRNA sequence analysis was performed for three strains. In vitro biodegradation of the polymer exposed to sunlight for 150 days incubated with the isolated pure strain (Exiguobacterium) and combination of two strains (Exiguobacterium and B. subtilis) for 75 days, showed a gravimetric weight loss of 4.7 and 12.1% respectively indicating synergy between the two organisms. The current study indicated, the isolated microorganisms could degrade starch blended HDPE.

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Section: Introductionmentioning

confidence: 99%

Biodegradation of Starch Blended High Density Polyethylene using Marine Bacteria Associated with Biofilm Formation and its Isolation Characterization

Muthukumar¹

2014

J Microb Biochem Technol

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“…These results are in agreement with previous reports . It has been generally accepted that the photo‐oxidation could reduce the crystallinity of the PE after additional of starch, which results in decreasing thermal and UV stability …”

Section: Resultsmentioning

confidence: 60%

“…Photo‐oxidative degradation is the process of degradation of the material by the action of light and the free radical chain degradation . Rate of abiotic oxidation of polyolefins is important as it determines the rate of subsequent biodegradation process.…”

Section: Introductionmentioning

confidence: 99%

New evidences of accelerating degradation of polyethylene by starch

Liu

Xie²,

Petinakis

et al. 2013

J of Applied Polymer Sci

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An investigation into the effects of starch on both, UV photo-oxidative degradation and biodegradation, of HDPE was focused on the interface between HDPE and starch using Synchrotron-FTIR microscope (SFTIR-M) and scanning electronic microscope (SEM). Carbonyl group detection by FTIR was conducted to evaluate the effect of degradation following exposure to UV photo-oxidative degradation. The results showed that the concentration of carbonyl groups on the interface were higher, suggesting the role of starch in accelerating the UV photo-oxidative degradation of HDPE. The interface between HDPE and starch was further observed under SEM to study the morphological changes after UV photo-oxidative degradation and biodegradation. Micro-cracking was observed on the interface between starch and HDPE after UV photo-oxidative degradation. Tensile testing after UV exposure showed that the variation rate of elongation was higher for the samples containing starch. Starch, an easily biodegradable material, can also act as initial source of nutrients for micro-organisms (bacteria, fungi, and algae) in the blend materials thus enhancing their biodegradability.

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“…The in situ application of ILs proved to be a much better strategy than the application of starch or prooxidants. This was the case even after ultraviolet or thermal treatment in which the greatest decrease was 8° …”

Section: Resultsmentioning

confidence: 95%

“…In this case, the application of silica with silane coupling agents, grafting, blending with polar polymers, or the use of compatibilizer are popular methods for silica dispersion and adhesion improvements. Moreover, additives (e.g., starch, pro‐oxidants, plasma treatment, or ozonation) increase polymer surface wettability, supposedly enhancing PE biodegradability.…”

Section: Introductionmentioning

confidence: 99%

Tuning the interphase adhesion in high‐density polyethylene–silica nanocomposites with ionic liquids

Donato

Zhigunov

et al. 2019

J of Applied Polymer Sci

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This work addresses the use of ionic liquids (ILs) as multifunctional additives in the formation of high-density polyethylene (HDPE)/sol-gel silica nanocomposites via the melt-mixing process. Different approaches for nanocomposite formation were studied and compared, including (1) silica modification with ILs during the sol-gel process and further addition into the polymer matrix, (2) reactive mixing in which silica-IL filler was formed in situ, and (3) direct IL application in the melt-mixing chamber with nonmodified silica xerogel and HDPE. The nanocomposites were characterized by thermogravimetric analyses, differential scanning calorimetry, scanning electron microscopy, dynamic thermomechanical analyses, transmission electron microscopy, and contact angle analyses. To improve the silica compatibilization with HDPE, we investigated imidazolium ILs that presented at least one nonpolar ionic counterpart. This permitted control of the silica structure, morphology, dispersion, and interfacial interactions, providing enhancements in thermomechanical properties.It has been shown that a higher particle aspect ratio improves PE rigidity, toughness, and thermal and barrier properties. 4-11 The use of nanofillers, such as fumed silica, 4-6 clays, 6,8 and different carbon species, [9][10][11] in various processes has shown promising results. Chrissafis et al. 6 compared the addition of 2.5% multiwall carbon nanotubes, pristine and modified montmorillonite, and surface-treated and untreated SiO 2 nanoparticles to high-density polyethylene (HDPE) via melt-mixing. They concluded that the addition of SiO 2 presented the best dispersion, also increasing the mechanical properties and thermal stability without affecting the melting point and crystallization temperatures. Dorigato et al. 4 melt-compounded with HDPE various untreated (hydrophilic) or surface-treated (hydrophobic) fumed silica nanoparticles and observed that filler aggregation is favored with increasing surface area. They also concluded that the nanosilica dispersion was promoted when hydrophobically modified, consequently enhancing both the thermal degradation resistance and the dimensional stability. Altogether, by adding the surface-treated silica, they Additional Supporting Information may be found in the online version of this article.

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Synergistic interaction of treatment and blending on the stability of high‐density polyethylene

Cited by 7 publications

References 43 publications

Biodegradation of Starch Blended High Density Polyethylene using Marine Bacteria Associated with Biofilm Formation and its Isolation Characterization

Biodegradation of Starch Blended High Density Polyethylene using Marine Bacteria Associated with Biofilm Formation and its Isolation Characterization

New evidences of accelerating degradation of polyethylene by starch

Tuning the interphase adhesion in high‐density polyethylene–silica nanocomposites with ionic liquids

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