Starch/Poly (Butylene Adipate-Co-Terephthalate)/Montmorillonite Films Produced by Blow Extrusion

Santos, Rodrigo A. L.; Müller, Carmen Maria Olivera; Grossmann, Maria Victória Eiras; Mali, Suzana; Yamashita, Fábio

doi:10.5935/0100-4042.20140170

Cited by 13 publications

(16 citation statements)

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“…According to the literature, polypyrrole is amorphous [34], therefore imperceptible in Figure 2b. All of the peaks were characteristic of the crystalline phase of the respective polymers, as reported in the literature [35]. In addition, with EDX, the Ca/P stoichiometry ratio of the PBAT/PPy/nHAp nanofiber was shown to have chemical similarity to the HAp of bones and teeth (Ca/P = 1.67 [36]).…”

Section: Discussionsupporting

confidence: 57%

In Vivo Evaluation of the Genotoxic Effects of Poly (Butylene adipate-co-terephthalate)/Polypyrrole with Nanohydroxyapatite Scaffolds for Bone Regeneration

Elias¹,

Filho

Silva

et al. 2019

Materials

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Here, butylene adipate-co-terephthalate/polypyrrole with nanohydroxyapatite (PBAT/PPy/nHAp) scaffolds were fabricated and characterized. The electrospinning process was carried out using 12 kV, a needle of 23 G, an infusion pump set at 0.3 mL/h, and 10 cm of distance. Afterwards, nHAp was directly electrodeposited onto PBAT/PPy scaffolds using a classical three-electrode apparatus. For in vivo assays (comet assay, acute and chronic micronucleus), 60 male albino Wistar rats with 4 groups were used in each test (n = 5): PBAT/PPy; PBAT/PPy/nHAp; positive control (cyclophosphamide); and the negative control (distilled water). Peripheral blood samples were collected from the animals to perform the comet test after 4 h (for damage) and 24 h (for repair). In the comet test, it was shown that the scaffolds did not induce damage to the % DNA tail and neither for tail length. After the end of 48 h (for acute micronucleus) and 72 h (for chronic micronucleus), bone marrow was collected from each rat to perform the micronucleus test. All of the produced scaffolds did not present genotoxic effects, providing strong evidence for the biological application of PBAT/PPy/nHAp scaffolds.

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Section: Discussionsupporting

confidence: 57%

In Vivo Evaluation of the Genotoxic Effects of Poly (Butylene adipate-co-terephthalate)/Polypyrrole with Nanohydroxyapatite Scaffolds for Bone Regeneration

Elias¹,

Filho

Silva

et al. 2019

Materials

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“…The addition of starch to the PBAT matrix increased the crystallinity, suggesting amylose recrystallization during the extrusion process [38]. The crystallinity associated with the recrystallization of the amylose which occurs may be because during the extrusion process an amylose (amorphous portion of the native starch) can be crystallized and this structural change can increase the degree of crystallinity [36][37][38].…”

Section: Crystallinity: Xrdmentioning

confidence: 99%

PBAT/TPS Composite Films Reinforced with Starch Nanoparticles Produced by Ultrasound

Silva

Correia

Druzian

et al. 2017

International Journal of Polymer Science

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The objective of the present work was to study the incorporation of starch nanoparticles (SNP) produced by ultrasound in blends of poly(butylene adipate-co-terephthalate) (PBAT) and thermoplastic starch (TPS). The films were produced by extrusion using varying percentages of SNP (1, 2, 3, 4, and 5% w/w). The SNP were prepared in water without the addition of any chemical reagent. The results revealed that ultrasound treatment results in the formation of SNP less than 100 nm in size and of an amorphous character and lower thermal stability and low gelatinization temperature when compared with cassava starch. Scanning electron microscopy (SEM) showed that films presented some starch granules. The relative crystallinity (RC) of films decreases with increasing concentration of SNP. The addition of SNP slightly affected the thermal degradation of the films. The DSC results showed that the addition did not modify the interaction between the different components of the films. Mechanical tests revealed an increase in Young's modulus (36%) and elongation-at-break (35%) with the incorporation of 1% SNP and this concentration reduced the water vapor permeability (53%) and significantly decreased the water absorption of the films, demonstrating that low concentrations of SNP can be used as reinforcement in a polymeric matrix.

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“…Biodegradable thermoformed and flexible films can be made of cassava flour (given its high starch content, making it suitable for use in the manufacture of various products in the food industry, as well as for the production of biopolymers) and cassava starch (as it can be converted into a thermoplastic material by interrupting the molecular interactions of the double helix chain, formed by hydrogen bridges between the hydroxyl groups, in the presence of a plasticizer aided by suitable temperature and shear stress [15,16], and by adding matter such as fique fiber, gelatin, poly(butylene adipate-coterephthalate), polylactic acid, glycerol, plasticizer, green composites, cellulose, chitosan, clay, pullulan, natural extracts, poly(vinyl alcohol), and kaolin [7,8,[17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35].…”

Section: Biodegradable Thermoformed and Flexible Filmsmentioning

confidence: 99%

Cadmium Contents in Biodegradable Films Made from Cassava

Rada‐Mendoza¹,

Herrera²,

Varela³

2022

Crystallization and Applications

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A Review of sample preparation and techniques used to determine Cadmium content in flexible films and biodegradable thermoformed products based on cassava. All determinations have been made using atomic absorption spectroscopy. The presence of this element in these matrices can be harmful if the maximum tolerated quantities are not complied by. The presence of Cadmium may be due, among other aspects, to the fact that it is present in the raw material, in industrial discharges or because it is found naturally. Its determination is an important parameter that needs to be considered as a good alternative for packaging.

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Starch/Poly (Butylene Adipate-Co-Terephthalate)/Montmorillonite Films Produced by Blow Extrusion

Cited by 13 publications

References 0 publications

In Vivo Evaluation of the Genotoxic Effects of Poly (Butylene adipate-co-terephthalate)/Polypyrrole with Nanohydroxyapatite Scaffolds for Bone Regeneration

In Vivo Evaluation of the Genotoxic Effects of Poly (Butylene adipate-co-terephthalate)/Polypyrrole with Nanohydroxyapatite Scaffolds for Bone Regeneration

PBAT/TPS Composite Films Reinforced with Starch Nanoparticles Produced by Ultrasound

Cadmium Contents in Biodegradable Films Made from Cassava

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