Biocomposites based on plasticized starch

Avérous, Luc; Halley, P. J.

doi:10.1002/bbb.135

Cited by 186 publications

(102 citation statements)

References 84 publications

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“…Compared to lactones, butyrates, valerates, and other monomers used for the synthesis of biodegradable polymers, starch is an inexpensive product whose transformation into a thermoplastic polymer can be accomplished in a rather straight-forward manner (Coombs and Hall 1998;Teixeira et al 2007;Averous and Halley 2009;Dogossy and Czigany 2011;Gandini 2011). As a result, thermoplastic starch (TPS) is considered one of the most promising biopolymers for large-scale applications.…”

Section: Peer-reviewed Articlementioning

confidence: 99%

High-Performance-Tensile-Strength Alpha-Grass Reinforced Starch-Based Fully Biodegradable Composites

Gironès¹,

Espinach²,

Pellicer³

et al. 2013

BioResources

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aThough there has been a great deal of work concerning the development of natural fibers in reinforced starch-based composites, there is still more to be done. In general, cellulose fibers have lower strength than glass fibers; however, their specific strength is not far from that of fiberglass. In this work, alpha-fibers were obtained from alpha-grass through a mild cooking process. The fibers were used to reinforce a starch-based biopolymer. Composites including 5 to 35% (w/w) alpha-grass fibers in their formulation were prepared, tested, and subsequently compared with those of wood-and fiberglass-reinforced polypropylene (PP). The term "high-performance" refers to the tensile strength of the studied composites and is mainly due to a good interphase, a good dispersion of the fibers inside the matrix, and a good aspect ratio. The tensile strength of the composites showed a linear evolution for fiber contents up to 35% (w/w). The strain at break of the composites decreased with the fiber content and showed the stiffening effects of the reinforcement. The prepared composites showed high mechanical properties, even approaching those of glass fiber reinforced composites. Keywords INTRODUCTIONIt is commonly accepted that biopolymers and bio-fibers have the potential to replace or reduce the consumption of fossil fuel-derived plastics. In addition, to facilitate the recycling of these materials, such replacement should lead to reductions in energy consumption, pollution, and CO 2 emissions. Hence, fiber-reinforced composites are often described as eco-friendly materials. However, the mechanical properties and/or the price of such composites have rendered them inadequate for many applications to date. In general, cellulosic fibers have inferior strength compared to their synthetic counterparts, such as aramid, carbon, and glass fibers.Due to their lower density, some natural fibers have a specific strength not far from those of fiberglass. On the other hand, bio-based matrices (such as polylactic acid or polyhydroxybutyrate) remain more expensive than petroleum-derived polymers. Nevertheless, thanks to their price/performance balance, ongoing innovations are offering new commercial opportunities for bio-based polymers and their composites in several applications. PEER-REVIEWED ARTICLEbioresources.com Gironès et al. (2013). "Alpha/starch composites," BioResources 8(4), 6121-6135 6122Compared to lactones, butyrates, valerates, and other monomers used for the synthesis of biodegradable polymers, starch is an inexpensive product whose transformation into a thermoplastic polymer can be accomplished in a rather straight-forward manner (Coombs and Hall 1998;Teixeira et al. 2007;Averous and Halley 2009;Dogossy and Czigany 2011;Gandini 2011). As a result, thermoplastic starch (TPS) is considered one of the most promising biopolymers for large-scale applications. During the last few decades, TPS has received considerable attention among the scientific world (John and Thomas 2008;Belhassen et al. 2009;Cañigueral et al. 2009;Cha...

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Section: Peer-reviewed Articlementioning

confidence: 99%

High-Performance-Tensile-Strength Alpha-Grass Reinforced Starch-Based Fully Biodegradable Composites

Gironès¹,

Espinach²,

Pellicer³

et al. 2013

BioResources

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“…O amido, um dos polímeros naturais biodegradáveis, tem sido considerado como um dos candidatos mais promissores, principalmente por causa de sua combinação atraente de disponibilidade e preço. O amido é composto por amilose (poli-α -1,4-d-glucana) e amilopectina (poli-α -1,4-d-glucana e α -1,6-d-glucana), é um polímero biodegradável e biocompatível obtido a partir de muitos recursos renováveis [6][7][8][9] . É baseado em ligações α (1-4) (em torno de 95%) e cerca de 5% de ligações α (1-6), que constituem pontos de ramificação que estão localizadas a cada 22-70 unidades de glicose [6] e gera um tipo de estrutura ramificada semelhante a uma corrente de uvas.…”

Section: Introductionunclassified

“…Os teores de amilose e amilopectina variam com a fonte botânica. O amido de batata, produzido em grande escala no mundo todo, vastamente utilizado na indústria alimentícia, apresenta em média cerca de 20% de amilose e 80% de amilopectina, contudo, o estágio de desenvolvimento da planta é um dos fatores que pode influenciar esta porcentagem [7][8][9] …”

Section: Introductionunclassified

Desenvolvimento de Nanocompósitos à base de Amido de Batata

Brito¹,

Tavares²

2013

Polímeros

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Resumo: Nanocompósitos de amido de batata foram preparados pelo método de intercalação por solução, com a adição de argilas montmorilonita: organicamente modificada (Viscogel B8) e não modificada argila sódica (NT25) e de sílicas: modificada (R972) e não modificada (A200). Os nanocompósitos foram caracterizados pelas técnicas convencionais de difratometria de raios X e análise termogravimétrica. Foram caracterizados também por uma técnica denominada como não convencional, a ressonância magnética nuclear (RMN) de baixo campo, que é alternativa e efetiva na caracterização de nanocompósitos. Com ela, pode-se investigar a dispersão das nanocargas pelo grau de intercalação e/ou esfoliação, além de verificar a distribuição e modificações da mobilidade molecular da matriz polimérica. Os materiais nanoestruturados obtidos com as argilas apresentaram boa dispersão e formação de nanomateriais mistos, com diferentes graus de intercalação e esfoliação. Ao adicionar as sílicas na matriz de amido pode-se observar uma diminuição da mobilidade do material, este efeito foi observado para ambas às sílicas utilizadas. Utilizando a técnica de TGA verificou-se um ligeiro aumento na estabilidade térmica do material produzido em relação ao amido. Palavras-chave: Amido, nanocompósitos, RMN de baixo campo. Development of Nanocomposites Based on Potato StarchAbstract: Nanocomposites of potato starch were prepared by the solution intercalation method with the addition of organically modified montmorillonite clay (Viscogel B and unmodified sodic clay (NT25) as well as modified and unmodified silica (R972 and A200, respectively), using water as the solvent. The nanocomposites were characterized by conventional techniques of X-ray diffraction and thermogravimetric analysis. They were also characterized using the non-conventional low-field nuclear magnetic resonance, which is an effective alternative technique for characterizing nanocompósitos. This technique allows one to investigate dispersion of nanofillers by the degree of intercalation and/ or exfoliation, in addition to determine the distribution of nanoparticles in the polymer matrix and modifications of the molecular mobility of these fillers. The nanostructured materials obtained with the clays presented good dispersion and formation of mixed nanomaterials, with different degrees of intercalation and exfoliation. The mobility of the material decreased upon adding silica in the starch matrix, which applied to both types of silica. From the TGA technique, a slight increase in thermal stability of the nanocomposite was noted in relation to the starch matrix. Keywords: Starch, nanocomposites, low-field NMR. IntroduçãoProdutos plásticos preparados a partir de polímeros sintéticos são amplamente utilizados em diversas áreas. Estes materiais não são facilmente degradáveis e causam sérios problemas ambientais. Nos últimos anos, os bioplásticos tiveram um grande interesse devido ao aumento da consciência em relação ao desenvolvimento sustentável [1][2][3][4][5] . O amido, um dos polímeros nat...

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“…However, PLA has its shortcomings, such as low thermal resistance, brittleness, poor resistance to gas and water vapor permeability, and low crystallization speed (Fortunati et al 2012a). Moreover, compared with other commercial polymers, its price is relatively high (Avérous and Halley 2009). To reduce these problems, PLA has been blended with various biodegradable polymers such as starch (Shirai et al 2013) and cellulose (Raquez et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Polylactic Acid Bionanocomposites Filled with Nanocrystalline Cellulose from TEMPO-Oxidized Oil Palm Lignocellulosic Biomass

Indarti

Rohaizu

Husin

et al. 2016

BioRes

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Bionanocomposites from polylactic acid (PLA) filled with unmodified nanocrystalline cellulose from TEMPO-oxidized oil palm empty fruit bunch (OPEFB-NCC) at various loading levels were fabricated using the solvent casting technique. Scanning electron microscopy (SEM), transmission electron microscopy (TEM), attenuated total reflectance Fourier transform infrared spectroscopy (ATF-FTIR), differential scanning calorimetry (DSC), and mechanical analyses were used to characterize the bionanocomposite films. FTIR suggested that the incorporation of the OPEFB-NCC was based on physical interaction. The melting temperature did not change markedly except at higher OPEFB-NCC additions, while the crystallization temperature shifted to lower temperatures and crystallinity increased with increasing OPEFB-NCC content.The SEM of cryo-fractured films indicated a rather weak compatibility between the OPEFB-NCC and PLA, resulting in the decrease of both the modulus and the tensile strength of the bionanocomposite.

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Biocomposites based on plasticized starch

Cited by 186 publications

References 84 publications

High-Performance-Tensile-Strength Alpha-Grass Reinforced Starch-Based Fully Biodegradable Composites

High-Performance-Tensile-Strength Alpha-Grass Reinforced Starch-Based Fully Biodegradable Composites

Desenvolvimento de Nanocompósitos à base de Amido de Batata

Polylactic Acid Bionanocomposites Filled with Nanocrystalline Cellulose from TEMPO-Oxidized Oil Palm Lignocellulosic Biomass

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