Evaluation of degradability of hydroxypropylated potato starch/polyethylene blend films

Kim, Meera

doi:10.1016/s0144-8617(03)00169-3

Cited by 65 publications

(27 citation statements)

References 13 publications

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“…Os amidos hidroxipropilados também têm sido largamente estudados e, de acordo com Kim (2003), à medida que se aumenta o grau de modificação em amidos hidroxipropilados, estes são degradados mais rapidamente, isto porque grupamentos hidroxipropila são mais susceptíveis à oxidação e futura degradação. Alguns pesquisadores têm relatado a necessidade de tratamentos especiais como a adição de fibras, minerais e componentes hidrofóbicos (óleos vegetais, monoglicerídeos, dentre outros) para melhorar a resistência à tração, flexibilidade e resistência ao contato com a água (ANDERSEN et al, 2001;LAWTON;SHOGREN;TIEFENBACHER, 1999TIEFENBACHER, , 2004SOYKEABKAEW;SUPAPHOL;RUJIRAVANIT, 2004).…”

Section: Formulação E Tecnologia De Produção De Filmes a Base De Amidounclassified

Filmes de amido: produção, propriedades e potencial de utilização

2010

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ResumoO interesse no emprego de matérias-primas provenientes de recursos renováveis para a produção de embalagens de alimentos vem crescendo. Dentre os biopolímeros mais promissores para este fim estão os amidos de diversas fontes botânicas, que são biodegradáveis, têm custo baixo e estão disponíveis em todo o mundo. Diante disto, este trabalho apresenta uma revisão bibliográfica sobre a caracterização e o potencial de utilização de filmes biodegradáveis a base de amido. Discute as propriedades mecânicas, de barreira e a cristalinidade dos filmes de amido e o efeito do uso de plastificantes sobre estas propriedades. As informações disponibilizadas mostram que existem grandes possibilidades de utilização destes materiais como embalagens de alimentos que, no entanto, dependem da produção de materiais mais estáveis às condições de armazenamento e do desenvolvimento de tecnologia de produção em escala industrial. Palavras-chave: Embalagens biodegradáveis, biopolímeros, amido, propriedades mecânicas, propriedades de barreira. AbstractThere is an increasing interest in the utilization of renewable resources for the production of food packaging. Among the biopolymers, starches from several sources have been considered as one of the most promising material for this purpose, and the reasons for this are that starches are biodegradable, are inexpensive and available in the worldwide. This work presents a bibliography review about biodegradable starch films characterization and potential of utilization. Discusses the starch films mechanical and barrier properties, the cristallinity and the effects of the use of plasticizers over these properties. The discussed informations indicate that exist great possibilities for these materials in food packaging, which depend on the production of more stable materials and the development of production technology in industrial scale.

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Section: Formulação E Tecnologia De Produção De Filmes a Base De Amidounclassified

Filmes de amido: produção, propriedades e potencial de utilização

2010

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“…The modification of polymers by blending is a mature technology developed in the 70 ies or even earlier. A large number of papers and books were published on the topic [31][32][33][34][35][36][37][38][39][40][41][42][43], and the theoretical studies carried out mostly on commodity and engineering thermoplastics paved the way for industrial applications. The advent of biopolymers resulted in a revival of blending technology, as their several disadvantages can be overcome by blending.…”

Section: Introductionmentioning

confidence: 99%

Interactions, structure and properties in poly(lactic acid)/thermoplastic polymer blends

Imre

Renner

Pukánszky

2014

Express Polym. Lett.

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Abstract. Blends were prepared from poly(lactic acid) (PLA) and three thermoplastics, polystyrene (PS), polycarbonate (PC) and poly(methyl methacrylate) (PMMA). Rheological and mechanical properties, structure and component interactions were determined by various methods. The results showed that the structure and properties of the blends cover a relatively wide range. All three blends have heterogeneous structure, but the size of the dispersed particles differs by an order of magnitude indicating dissimilar interactions for the corresponding pairs. Properties change accordingly, the blend containing the smallest dispersed particles has the largest tensile strength, while PLA/PS blends with the coarsest structure have the smallest. The latter blends are also very brittle. Component interactions were estimated by four different methods, the determination of the size of the dispersed particles, the calculation of the Flory-Huggins interaction parameter from solvent absorption, from solubility parameters, and by the quantitative evaluation of the composition dependence of tensile strength. All approaches led to the same result indicating strong interaction for the PLA/PMMA pair and weak for PLA and PS. A general correlation was established between interactions and the mechanical properties of the blends.

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“…Several previous studies have reported on biodegradation of polythene by bacterial [2,11] and fungal species [2,4,13] It has been reported that Pseudomonas spp. degrade polythene bags made of LDPE in natural as well as artificial environment.…”

Section: Introductionmentioning

confidence: 99%

Biodegradation of Low Density Polythene (LDPE) by Pseudomonas Species

et al. 2012

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Low density polythene (LDPE) is the most widely used packaging material primarily because of its excellent mechanical properties, barrier properties against water, light weight, low cost and high energy effectiveness. However, due to its ubiquitous nature, and resistance to biodegradability, the disposal strategies are crucial and need attention. Recently, microorganisms have become the focus of interest for environmental friendly disposal of plastic and polymer-based waste. This manuscript aims to investigate the extent of biodegradability of LDPE by four different strains of Pseudomonas bacteria-Pseudomonas aeruginosa PAO1 (ATCC 15729), Pseudomonas aeruginosa (ATCC 15692), Pseudomonas putida (KT2440 ATCC 47054) and Pseudomonas syringae (DC3000 ATCC 10862). Degradation of LDPE was determined by weight loss of the sample, morphological changes, mechanical and spectroscopic variations. The eluted compounds after degradation were analysed by gas chromatography coupled with mass spectroscopy. Our results show that Pseudomonas spp. can degrade LDPE films.

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Evaluation of degradability of hydroxypropylated potato starch/polyethylene blend films

Cited by 65 publications

References 13 publications

Filmes de amido: produção, propriedades e potencial de utilização

Filmes de amido: produção, propriedades e potencial de utilização

Interactions, structure and properties in poly(lactic acid)/thermoplastic polymer blends

Biodegradation of Low Density Polythene (LDPE) by Pseudomonas Species

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