Biodegradable Polymers- A Review on Recent Trends and Emerging Perspectives

Luckachan, Gisha Elizabeth; Pillai, C. K. S.

doi:10.1007/s10924-011-0317-1

Cited by 651 publications

(385 citation statements)

References 460 publications

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“…Over the past two decades, plant fibers have been receiving considerable attention as substitutes for synthetic fiber reinforcements. Unlike the traditional synthetic fibers like glass and carbon the plant fibers are able to impart certain benefits to the composites such as low density, high stiffness, low cost, renewability, biodegradability, environmentallyfriendly and high degree of flexibility during processing [2][3][4][5][6][7][8] . The properties of the natural fiber composites are strongly dependent on the fiber properties as well as on the structural parameters such as fiber diameter, length, distribution, orientation, volume fraction of the fibers and layering arrangement in composites.…”

Section: Introductionmentioning

confidence: 99%

Mechanical and Water Intake Properties of Banana-Carbon Hybrid Fiber Reinforced Polymer Composites

Ramesh

Ravi²,

Manikandan³

et al. 2017

Mat. Res.

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The concern for the environmental pollution and the prevention of resources has attracted researchers to develop new eco-friendly green materials based on sustainability principles. In this experimental study, there are six different composite samples were fabricated by using banana and carbon fibers with epoxy resin matrix. The mechanical properties such as tensile strength, flexural strength, impact strength, and water uptake properties of these composites have been evaluated. The composites reinforced with pure carbon fibers can hold the maximum tensile strength of 288.03 MPa, flexural strength of 3.12 kN, impact strength of 4.58 J and water intake percentage of 62.3%. Whereas the composites reinforced with carbon and banana fibers can withstand the maximum tensile strength of 277.06 MPa, flexural strength of 3.07 kN, impact strength of 4.36 J and water intake percentage of 70%. The finite element analysis has been carried out to predict the mechanical properties of the composites by using ANSYS 15.0. The experimental results are compared with the predicted values and have found that, there is a high correlation occurs between the results. Scanning electron microscopy (SEM) analysis is carried out to study the fiber matrix interfaces and analyse the structure of the fractured and water absorbed surfaces.

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Section: Introductionmentioning

confidence: 99%

Mechanical and Water Intake Properties of Banana-Carbon Hybrid Fiber Reinforced Polymer Composites

Ramesh

Ravi²,

Manikandan³

et al. 2017

Mat. Res.

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“…Biodegradation in the context for polymers is the breakdown of a high molecular weight molecule into smaller components of low molecular weight molecules caused by enzymes from microorganisms and/or environmental catalysts (Luckachan and Pillai 2011;Wang et al 2003). Table 2 provides a summary of biodegradable polymer systems with respect of morphological properties and biodegradation measurements while physiological conditions according to plasma fluid are kept constant.…”

Section: Fabrication Of Biodegradable Microneedles From Mouldsmentioning

confidence: 99%

Potential of biodegradable microneedles as a transdermal delivery vehicle for lidocaine

Nayak

Das

2013

Biotechnol Lett

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There has been an increasing interest in applying biotechnology in formulating and characterising new and innovative drug delivery methods, e.g., drug-loaded biodegradable microneedles within the area of transdermal delivery technology. Recently, microneedles have been proposed for use in pain management, e.g., post-operative pain management through delivery of a local anaesthetic, namely, lidocaine. Lidocaine is a fairly common, marketed prescription-based local anaesthetic pharmaceutical, applied for relieving localised pain and lidocaine-loaded microneedles have been explored. The purpose of this review is to evaluate the properties of biodegradable polymers that may allow the preparation of microneedle systems, methods of preparing them and pharmacokinetic conditions in considering the potential use of lidocaine for delivery through the skin.

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“…Os metais de transição, especialmente ferro (Fe), manganês (Mn) e cobalto (Co), são os principais constituintes dos aditivos pró-degradantes, os quais são denominados, comercialmente, de aditivos "oxi-bio". Aditivos pró-degradantes são comumente utilizados em produtos que possuam ciclo de vida útil relativamente curto e destino pós-consumo incerto [1][2][3][4][5][6][7][8][9][10][11] .…”

Section: Introductionunclassified

“…Para isto, o PEAD precisará receber grupos orgânicos oxigenados e sofrer fragmentação através de processos oxidativos de degradação, como a termooxidação, por exemplo. A efetiva assimilação do PEAD, pelos microrganismos, ocorrerá quando suas moléculas possuírem massas molares inferiores a 500 Dalton; para o PEAD, massas molares médias entre 2.000 e 3.000 Dalton possuem significativa fração de fragmentos com massa molar inferior a 500 Dalton [10,11,14,15] . A participação dos metais de transição na degradação abiótica do PEAD, e de outras poliolefinas, ocorre na etapa de propagação do processo oxidativo de degradação; a aceleração da degradação é promovida através da decomposição dos hidroperóxidos pelos metais de transição, conforme as reações apresentadas na Figura 1 [6,7,16] .…”

Section: Introductionunclassified

Avaliação de sistemas pró-degradantes na degradação termooxidativa do PEAD

2015

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ResumoSistemas pró-degradantes fundamentados em estearatos de ferro e de manganês e o aditivo comercial d2w, fundamentado em sal orgânico de manganês, foram avaliados em filmes de polietileno de alta densidade (PEAD) em ambiente termooxidativo (estufa a 80 °C e ausência de luz). A degradação termooxidativa foi monitorada por propriedades mecânicas, espectroscopia de infravermelho e cromatografia por exclusão de tamanho. Os resultados mostram que ambos os metais aceleram a degradação termooxidativa do PEAD. Entretanto, o desempenho pró-degradante do estearato de manganês é significativamente superior ao do estearato de ferro. Para o ferro, a degradação aumenta com o aumento da concentração do metal, enquanto que o manganês apresenta valor máximo de degradação em função da concentração. O estado de oxidação do ferro não interfere no desempenho pró-degradante. O aditivo comercial d2w TM acelera, significativamente, a termooxidação do PEAD, mas seu desempenho é inferior ao estearato de manganês provavelmente em função do conjunto de estabilizantes adicionados ao produto comercial. Palavras-chave: degradação, PEAD, estearato de ferro, estearato de manganês, pró-degradante. AbstractThe evaluation of pro-degradant systems based on iron and manganese in the form of metallic stearate, and d2w TM commercial additive, based on organic salt of manganese, was carried out on films of high density polyethylene (HDPE) in thermal oxidative conditions (80 °C oven and absence of light). The thermo oxidative degradation was monitored by mechanical properties, by infrared spectroscopy and by size exclusion cromatography. The results show that both metals accelerate thermal oxidative degradation of HDPE. However, the pro-degrading performance of manganese is significantly higher than iron. Considering iron, the degradation increases with increasing concentration of the metal, while manganese presents the maximum value of degradation depending on the concentration. The oxidation state of iron does not interfere with pro-degrading performance. The commercial additive d2w TM significantly accelerates HDPE thermo-oxidation, but its performance is lower than manganese stearate as a function of the set of stabilizing additives to be added to the commercial product.

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Biodegradable Polymers- A Review on Recent Trends and Emerging Perspectives

Cited by 651 publications

References 460 publications

Mechanical and Water Intake Properties of Banana-Carbon Hybrid Fiber Reinforced Polymer Composites

Mechanical and Water Intake Properties of Banana-Carbon Hybrid Fiber Reinforced Polymer Composites

Potential of biodegradable microneedles as a transdermal delivery vehicle for lidocaine

Avaliação de sistemas pró-degradantes na degradação termooxidativa do PEAD

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