Physical structure of polyolefin−starch blends after ageing

Zuchowska, Danuta; Hlavatá, D.; Steller, Ryszard; Adamiak, W.; Meissner, W.

doi:10.1016/s0141-3910(98)00212-2

Cited by 42 publications

(18 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…However, when the probe was pointed on sample smeared with worm homogenate, an additional peak at ~3,350 cm -1 was seen ( Figure 1D, red line). This FTIR peak corresponds to the one previously described as the ethylene glycol signature (also compare Figure 1E with Figure 4B in [4]) [3,6]. In addition, a peak at 1,700 cm -1 appeared in the treated sample, which is the classical signature of the carbonyl bond ( Figure 1E, red line).…”

supporting

confidence: 75%

Polyethylene bio-degradation by caterpillars of the wax moth Galleria mellonella

2017

View full text Add to dashboard Cite

Plastics are synthetic polymers derived from fossil oil and largely resistant to biodegradation. Polyethylene (PE) and polypropylene (PP) represent ∼92% of total plastic production. PE is largely utilized in packaging, representing ∼40% of total demand for plastic products (www.plasticseurope.org) with over a trillion plastic bags used every year [1]. Plastic production has increased exponentially in the past 50 years (Figure S1A in Supplemental Information, published with this article online). In the 27 EU countries plus Norway and Switzerland up to 38% of plastic is discarded in landfills, with the rest utilized for recycling (26%) and energy recovery (36%) via combustion (www.plasticseurope.org), carrying a heavy environmental impact. Therefore, new solutions for plastic degradation are urgently needed. We report the fast bio-degradation of PE by larvae of the wax moth Galleria mellonella, producing ethylene glycol.

show abstract

supporting

confidence: 75%

Polyethylene bio-degradation by caterpillars of the wax moth Galleria mellonella

2017

View full text Add to dashboard Cite

show abstract

“…Filmes de PCL e PHB de 50 µm submetidos a biotratamento em água do mar, durante 10 semanas, mostraram mudanças morfológicas importantes e perda de massa de 25 e 9%, respectivamente, porém o PLA, utilizado no experimento, não mostrou mudanças significativas, relacionadas à morfologia e à massa 42 . A biodegradação sob ação de enzimas pode ser monitorada por medidas de massa molar (Cromatografia de Permeação em Gel-GPC), da presença de grupos polares (Infravermelho com Transformada de Fourier -FTIR), de mudanças nas propriedades mecâ-nicas (Análise Termo-Mecano-Dinâmica -DMTA), de mudanças de estrutura de microfase (Calorimetria Exploratória Diferencial -DSC) ou de estrutura de macrofase (Microscopia Eletrônica de Varredura -SEM) 43 . A biodegradação envolve não só a ação de enzimas como também outros mecanismos de interação entre os microrganismos e a superfície polimérica e pode ser chamada de biodeterioração 16 .…”

Section: Oxidação Biológicaunclassified

Polímeros biodegradáveis - uma solução parcial para diminuir a quantidade dos resíduos plásticos

Franchetti¹,

Marconato²

2006

Quím. Nova

108

View full text Add to dashboard Cite

Recebido em 13/12/04; aceito em 21/10/05; publicado na web em 24/3/06 BIODEGRADABLE POLYMERS -A PARTIAL WAY FOR DECREASING THE AMOUNT OF PLASTIC WASTE. The large use of plastics has generated a waste deposit problem. Today plastic wastes represent 20% in volume of the total waste in the municipal landfills. To solve the disposal problem of plastics methods have been employed such as incineration, recycling, landfill disposal, biodegradation and the use of biodegradable polymers. Incineration of plastic wastes provokes pollution due to the production of poisonous gases. Recycling is important to reduce final costs of plastic materials, but is not enough in face of the amount of discarded plastic. In landfills plastic wastes remain undegraded for a long time, causing space and pollution problems. Biodegradation is a feasible method to treat some plastics, but intensive research is necessary to find conditions for the action of microorganisms. All of these methods are important and the practical application of each one depends on the type and amount of the plastic wastes and the environmental conditions. Therefore, a great deal of research has focused on developing biodegradable plastics and its application because it is an important way for minimizing the effect of the large volume of plastic waste discarded in the world.Keywords: biodegradable polymers; plastic waste; biodegradation. INTRODUÇÃOAté pouco tempo atrás era importante descobrir materiais cada vez mais duráveis para utilização diária no mercado e dentre estes estavam os plásticos, com grande variedade de aplicações, devido a suas propriedades, versatilidade de uso e preço 1 . Como o uso dos plásticos vem aumentando muito no mundo todo (mais de 100 milhões de t/ano de plásticos produzidos) 2 , conseqüentemente é grande a quantidade de resíduos plásticos descartados no meio ambiente, isto é, 20% do volume total [3][4][5] . Os plásticos sintéticos, materiais formados de macromoléculas, denominados polímeros (do grego: polimuitos, meros-partes, unidades), são muito resistentes à degradação natural, quando descartados no meio ambiente, isto é, em aterros ou lixões municipais, daí seu acúmulo cada vez mais crescente 6,7 . Os plásticos mais utilizados na vida diária, desde 1940, têm sido polietileno (PE), polipropileno (PP), poliestireno (PS), poli(tereftalato de etileno) (PET) e poli(cloreto de vinila) (PVC) que, apesar do avanço no processamento e fabricação, geram dois grandes problemas: o uso de fonte não-renovável (como o petróleo) para obtenção de sua matéria-prima e a grande quantidade de resíduos gerada para descarte 10 . Além disso, é sabido que muitos plásticos exigem mais de 100 anos para degradação total, tendo em vista que sua alta massa molar média e hidrofobicidade dificultam a ação dos microrganismos e de suas enzimas na superfície do polímero 11,12 . Para tratar de tanto resíduo plástico tem sido empregadas, usualmente, quatro tipos de estratégias: IncineraçãoEste processo apresenta a vantagem de diminuir rapidamente o volume de material des...

show abstract

“…In previous papers, starch/PEcomposites [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20], lignin/PE [21][22][23][24], husk/PE [25][26][27], cellulose/PE [28][29][30][31][32], and wood flour/PE [33][34] showed that all of the biomass were being interest for research.Preparation of biodegradable films by acetylated acid modified rice starches and the thermal properties have been extensively studied [35].Thermoplastic starch could be an ideal matrix for packaging material or single-use articles, because it is a renewable resource material and biodegradable [36]. Since water is a plasticizer for starch, the performance of thermoplastic starch may be unstable and depending on the moisture contents, being in equilibrium with the ambient relative humidity [37].…”

Section: Introductionmentioning

confidence: 99%

Physical and mechanical of breadfruit leaves-polyethylene composites

Satoto

Rohmah

Suhandi

2017

IOP Conf. Ser.: Earth Environ. Sci.

View full text Add to dashboard Cite

Abstract.A degradable polymeric composite was prepared from polyethylene (PE) and breadfruit leaves tree powders. Breadfruit leaves tree powders were mixed with PE in an internal mixer at a temperature above the glass transition of PE without additives. Formulations were based on PE/leaves ratio of 100/0, 90/10, 85/15, 80/20 and 75/25 on a dry weight basis. The effect of leaves powders of 140 and 100 meshon the composite mechanical properties was evaluated by means of universal testing machine (UTM) and hardness Rockwell tester. The results showed increases of elastic modulus and flexural modulus of the composites with increasing leaves powders. Tensile strength, yield strength, yield strain, and hardness decreased with increasing percentage of leaves powders in the composites. Flexural strength was slightly decreased with the presence of the leaves powders but independent on the percentage of the leaves powders. In general, the composite properties of 140 mesh leaves powders were more enhanced compare with that of 100 mesh. PE/leaves composites increased water absorption and caused the bulk composite surface more porous. Hence, oxobiodegradation processes will more easily take place in the PE/leaves composites.

show abstract

Physical structure of polyolefin−starch blends after ageing

Cited by 42 publications

References 11 publications

Polyethylene bio-degradation by caterpillars of the wax moth Galleria mellonella

Polyethylene bio-degradation by caterpillars of the wax moth Galleria mellonella

Polímeros biodegradáveis - uma solução parcial para diminuir a quantidade dos resíduos plásticos

Physical and mechanical of breadfruit leaves-polyethylene composites

Contact Info

Product

Resources

About