Nanostabilization of thermally processed high amylose hydroxylpropylated starch films

Dean, Katherine; Petinakis, Eustathios; Goodall, Liz; Miller, Tony; Yu, Long; Wright, Neil T.

doi:10.1016/j.carbpol.2011.05.003

Cited by 22 publications

(10 citation statements)

References 32 publications

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“…Ikeo et al (Vertuccio et al 2009) suggested that the addition of MMT-Na + could improve the compatibility between starch and PCL. Besides, Dean et al (2011) suggested there was a "nanostabilization" effect of MMT-Na + in starch-PVA blends, meaning the starch recrystallization could be disrupted by the nanofiller, which reduced the rate of embrittlement over time, in agreement with a previous study (McGlashan and Halley 2003).…”

Section: Effect Of Blending With Other Polymerssupporting

confidence: 70%

“…Nanocomposites based on starch blends are also expected to show improved characteristics such as mechanical properties (increases in the storage modulus (Bocchini et al 2010;Vertuccio et al 2009), Young's modulus (Arroyo et al 2010;Avella et al 2005;Dean et al 2008Dean et al , 2011Ikeo et al 2006;McGlashan and Halley 2003;Mondragón et al 2009;Pérez et al 2007), and tensile strength (Arroyo et al 2010;Avella et al 2005;Dean et al 2008Dean et al , 2011Ikeo et al 2006;McGlashan and Halley 2003;Mondragón et al 2009;Pérez et al 2007)). However, it is quite significant to note that the incorporation of another polymer (usually being relatively hydrophobic) would modify the hydrophilic/hydrophobic balance of the material.…”

Section: Effect Of Blending With Other Polymersmentioning

confidence: 98%

“…In order to produce starch-based nano-biocomposites with better properties, starch has been blended with different biodegradable and nonbiodegradable polymers, including PLA (Arroyo et al 2010;Hanna 2008, 2009;Lee et al 2007bLee et al , 2008a, PCL (Ikeo et al 2006;Kalambur and Rizvi 2005, 2004Perez et al 2008Perez et al , 2007Perez et al , 2008aVertuccio et al 2009), PVA (Dean et al 2008(Dean et al , 2011; Majdzadeh-Ardakani and Nazari 2010), PBAT (Nayak 2010;Raquez et al 2011), PBSA (Bocchini et al 2010), and some trademarked polyesters (Ikeo et al 2006;McGlashan and Halley 2003;Park et al 2007). In addition, starch-natural rubber nano-biocomposites have also been studied (Mondragón et al 2009).…”

Section: Effect Of Blending With Other Polymersmentioning

confidence: 98%

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Advanced Nano-biocomposites Based on Starch

Xie¹,

Pollet²,

Halley³

et al. 2014

Polysaccharides

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Starch as a biopolymer directly extracted from nature has received much attention in recent years due to its strong advantages such as low cost, wide availability, renewability, and total compostability without toxic residues. Starch-based materials always display properties that are less satisfactory than those of traditional polymer materials, which can be ascribed to the inherent characteristics of starch. To make such materials to be truly competitive and to widen its applications, the development of starch-based nano-biocomposites could be a promising solution. This chapter provides the fundamental knowledge related to starch-based nano-biocomposites as well as the most recent developments in this area. Various types of nanofillers that have been used with plasticized starch are discussed such as montmorillonite, cellulose nanowhiskers, and starch nanoparticles. The preparation strategies for starch-based nano-biocomposites with these types of nanofillers and the corresponding dispersion state and related properties are also largely discussed.

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Section: Effect Of Blending With Other Polymerssupporting

confidence: 70%

Section: Effect Of Blending With Other Polymersmentioning

confidence: 98%

Section: Effect Of Blending With Other Polymersmentioning

confidence: 98%

See 1 more Smart Citation

Advanced Nano-biocomposites Based on Starch

Xie¹,

Pollet²,

Halley³

et al. 2014

Polysaccharides

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“…This allows free water molecules to hydrogen-bond with the starch chains (Gilfillan, Sopade, & Doherty, 2013). Thus, hydroxypropylated starch has been usually blended with other natural polymers (i.e., gelatin) or synthetic polymers (i.e., maleated-polycaprolactone, poly-hydroxyamino ether), nanofillers (i.e., silica, montmorillonite) or fibers (i.e., sugar cane) to improve the TS and water sensibility in cast and extruded films or foams (Dean et al, 2011;Frosta et al, 2011;Gilfillan et al, 2013;Nabar, Narayan, & Schindler, 2006;Nabar, Raquez, Dubois, & Narayan, 2005;Zhang et al, 2013). However, the poor compatibility of hydroxypropylated starch and additives often lead to poorer physical and mechanical properties (Nabar et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Sheet‐extruded films from blends of hydroxypropylated and native corn starches, and their characterization

Kim

Lamsal

Jane

et al. 2019

J Food Process Engineering

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Sheet‐extruded films from the blends of hydroxypropylated normal corn starch (HP) and native normal corn starch (NS) at weight ratios of 100:0, 90:10, 70:30, 50:50, 30:70, and 0:100 were prepared and characterized. Glycerol and water were added as plasticizers at 11 and 27% starch weight, respectively. The highest tensile strength (TS) and longest elongation to break (EB) for dry films were observed at 70:30 HP: NS ratio, which was 25.76 MPa, and 3.97%, respectively. However, TS and EB of this 70:30 blend extruded starch film exhibited low resistance upon wetting for 10s. The film TS and EB were reduced to 13.26 MPa and 3.35%, respectively. Addition of 0.5% (wt/wt starch) succinic acid (SA) as a cross‐linker to 70:30 HP: NS starch blend before film extrusion positively affected both TS and EB of films upon wetting; rather higher TS (16.64 MPa) and EB (4.85%) values were observed, which indicated improvement in water resistance of the films. Sheet‐extruded films from 70:30 HP: NS blends resulted in improved dry strength, and upon cross‐linking with SA, improved wet strength as well. The films had smooth and compact structure, which was explained by esterification/transesterification reactions promoted by SA, and confirmed by Fourier‐transform infrared spectroscopy analysis. Practical Applications Manufacturing packaging films from biological sources, as well as coating materials, would be beneficial to the environment along with wider applications. Biobased packaging materials include both edible coatings and edible films along with primary and secondary packaging materials, and could also have non‐food applications. They are derived from renewable sources and are potentially biodegradable through composting (which is a technique for waste management). Hydroxypropylation of starch results in wider functionality, and sheet‐extrusion can result in more flexible and transparent films. Blends of 70:30 HP: NS resulted in stronger sheet‐extruded films; testing of both dry and wet strengths of films indicated its suitability for both as edible coating (wet application), and other dry coatings/ films. These blend film can be an alternative to synthetic packaging films within their limitations.

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“…Further crystalline modifications of TPS were reported, which develop only at specific processing conditions (e.g, E H ‐type, which is reported to form during extrusion at high temperature and low water content). It is also generally accepted that TPS contains residual A–C types of crystallinity owing to the incomplete transformation of the initial starch structure during processing …”

Section: Introductionmentioning

confidence: 99%

Effect of Storage Time on the Structure and Mechanical Properties of Starch/Bentonite Nanocomposites

2018

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Thermoplastic starch (TPS), plasticized with glycerol and water, and its nanocomposites containing up to 7.5 parts per hundred resin (phr) pristine bentonite (BT) are prepared by melt compounding. Effects of the BT reinforcement and storage time on the morphology, water content, and mechanical properties of the related TPS nanocomposites are investigated on compression molded specimens. Morphology change is followed by wide‐angle X‐ray scattering (WAXS) measurements. The presence of BT increases the rate of transformation from A‐ to V‐type crystalline form. It is also found that BT particles hinders the recrystallization (retrogradation) of TPS. BT becomes intercalated in TPS, which is supported by the water used as additional plasticizer for the compounding of maize starch. According to gravimetric measurements, TPS samples lose part of their water content during retrogradation/aging. Both the incorporation of BT and the time of aging result in increased strength and stiffness, however at the cost of elongation at break. This is associated with enhanced strength and stiffness, which is ascribed to a change (from more to less hydrated) in the interphase. According to scanning electron and atomic force microscopy analysis, the reinforcing BT particles are homogenously dispersed on nano and micron scale within the TPS matrix.

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Nanostabilization of thermally processed high amylose hydroxylpropylated starch films

Cited by 22 publications

References 32 publications

Advanced Nano-biocomposites Based on Starch

Advanced Nano-biocomposites Based on Starch

Sheet‐extruded films from blends of hydroxypropylated and native corn starches, and their characterization

Effect of Storage Time on the Structure and Mechanical Properties of Starch/Bentonite Nanocomposites

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