Association between plasticized starch and polyesters: Processing and performances of injected biodegradable systems

Avérous, Luc; Fringant, C.

doi:10.1002/pen.10768

Cited by 145 publications

(61 citation statements)

References 18 publications

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“…Other approaches include blending the starch composites with certain synthetic polymers (Averous and Fringant 2001), chemically modifying the starch by adding crosslinking agents or through esterification (Reddy and Yang 2010;Averous 2004;Chatakanonda et al 2000;Shogren et al 1998), or adding lignin (Baumberg et al 1998). In addition, fibres can be used as reinforcements for SBs to overcome these problems.…”

Section: Introductionmentioning

confidence: 99%

Morphological, Thermal, and Mechanical Properties of Starch Biocomposite Films Reinforced by Cellulose Nanocrystals From Rice Husks

Johar¹,

Ahmad²

2012

BioResources

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A series of glycerol-plasticized starch composites reinforced by rice-husk cellulose nanocrystals was successfully fabricated through the solution casting technique. The rice husks must undergo alkali treatment, bleaching, and sulphuric acid hydrolysis before cellulose nanocrystals can be produced. The cellulose nanocrystal content used as filler was varied from 0 to 10 wt%. The thermal stability of the composite were analysed by thermogravimetric analysis (TGA) and derivative thermogravimetry (DTG). The starch biocomposite films reinforced with rice-husk cellulose nanocrystals showed improved tensile strengths and tensile moduli. Transmission electron microscopy (TEM) was used to determine the diameter and length distribution of the cellulose nanocrystals. Field emission scanning electron microscopy (FESEM) showed that the cellulose nanocrystals (CNCs) were well distributed in the matrix. At the optimum 6% filler loading, the cellulose nanocrystals exhibited a higher reinforcing efficiency in the plasticized starch biocomposites than at any other filler loading.

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Section: Introductionmentioning

confidence: 99%

Morphological, Thermal, and Mechanical Properties of Starch Biocomposite Films Reinforced by Cellulose Nanocrystals From Rice Husks

Johar¹,

Ahmad²

2012

BioResources

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“…The main disadvantages of TPS are its pronounced hydrophilic character and inadequate mechanical properties. The inferior properties of TPS can be improved by the incorporation of other materials (natural fibers, nanoclays, or other biodegradable polymers) [1,2,[4][5][6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Thermoplastic Starch/Wood Composites: Effect of Processing Technology, Interfacial Interactions and Particle Characteristics

Fekete

Kun

Móczó

2017

Period. Polytech. Chem. Eng.

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IntroductionRecently a growing interest has been shown in the application of biopolymers as packaging materials in order to reduce the environmental pollution caused by plastic waste and to achieve sustainable development. Starch is considered as one of the most promising biopolymers because it is readily available, cheap and biodegradable. Starch is a semicrystalline polymer and it represents the major form of stored carbohydrates in plants. Starch is a mixture of two substances composed of α-D glucopyranosyl repeating units, an essentially linear polysaccharide-amylose and a highly branched polysaccharideamylopectin. One of the major problems with granular starch is its limited processability, which can be improved by the use of plasticizers. Thermoplastic starch can be obtained by the destruction of the starch granules in the presence of plasticizers under specific conditions. Polyols such as glycerol, glycols as well as water are the most widely used plasticizers [1][2][3]. The main disadvantages of TPS are its pronounced hydrophilic character and inadequate mechanical properties. The inferior properties of TPS can be improved by the incorporation of other materials (natural fibers, nanoclays, or other biodegradable polymers) [1,2,[4][5][6][7][8][9][10][11].A considerable number of papers deal with the effect of natural fibers on the properties of thermoplastic starch. Most of them study the influence of fiber type and amount usually by determining properties at one or two fiber contents. All kinds of fibers have been used as filler in TPS including various forms of cellulose [6,[12][13][14][15][16][17][18][19][20][21][22][23][24], jute [18,[25][26][27], sisal [28][29][30][31][32][33], wheat straw [13], flax [23,34] hemp [13,28,35,36], cotton [13,37,38], flax [19,39], ramie [20,40].According to the existing literature a relatively small number of papers have been published which consider the practical relevance of TPS/wood composites [7,[41][42][43][44][45][46]. There are even fewer paper about systematic experiments carried out as a function of fiber content in a wide composition range [2,41,42], furthermore, it is very difficult to find publications on the effect of processing methods on the properties of TPS/wood composites. In our earlier work we investigated different TPS/wood composites prepared by injection molding [47].

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“…Based on the experience in the food processing industry, thermoplastic starch (TPS) was developed by disrupting starch granules with the help of heat and shearing action [5][6][7][8]. TPS can be further processed with slightly modified equipment like ordinary plastics, however, its drawbacks like low mechanical properties, quick ageing feature, and low water resistant properties made it only adequate for blends mostly in combination with another biodegradable polymer [9][10][11][12]. Nowadays the TPS/PCL (polycaprolactone) blend is mostly used for disposable shopping bags.…”

Section: Introductionmentioning

confidence: 99%

Crystalline structure of annealed polylactic acid and its relation to processing

Tábi¹,

Sajó²,

Szabó³

et al. 2010

Express Polym. Lett.

273

190

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Abstract. This paper focuses on the crystalline structure of injection moulding grade poly(lactic acid) (PLA) and the effect of crystalline structure on the processing. The research is induced by the significant differences in crystallinity of the pure PLA resin, and the injection moulded product, and thus the reprocessing of PLA products. 2 mm thick PLA sheets were injection moulded and re-crystallized in a conventional oven at 60-140°C, for 10-60 minutes to achieve various crystalline contents. The properties of these sheets were investigated by dynamic mechanical analysis (DMA), differential scanning calorimetry (DSC), and wide angle X-ray diffraction (WAXD). In a processing plant the rejected parts are recycled and reused as raw material for further cycles, accordingly the various crystalline content PLA products were reprocessed as a resin, to investigate the processing itself. When PLA products are reprocessed, due to the adherent feature of amorphous PLA processing difficulties may occur. This adherent effect of the amorphous PLA was investigated and characterized.

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Association between plasticized starch and polyesters: Processing and performances of injected biodegradable systems

Cited by 145 publications

References 18 publications

Morphological, Thermal, and Mechanical Properties of Starch Biocomposite Films Reinforced by Cellulose Nanocrystals From Rice Husks

Morphological, Thermal, and Mechanical Properties of Starch Biocomposite Films Reinforced by Cellulose Nanocrystals From Rice Husks

Thermoplastic Starch/Wood Composites: Effect of Processing Technology, Interfacial Interactions and Particle Characteristics

Crystalline structure of annealed polylactic acid and its relation to processing

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