Properties of biodegradable citric acid-modified granular starch/thermoplastic pea starch composites

Ma, Xiaofei; Chang, Peter R.; Yu, Jianxing; Stumborg, Mark

doi:10.1016/j.carbpol.2008.05.020

Cited by 189 publications

(106 citation statements)

References 31 publications

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“…Another two peaks at 999 cm -1 and 1020 cm -1 are attributed to C-O bond stretching of C-O-C group [6]. The peaks were shifted from 998 cm -1 to 995 cm -1 and 1018 cm -1 to 1016 cm -1 respectively.…”

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confidence: 95%

“…Therefore, the differences in the onset temperatures of starch thermal decomposition and weight loss at onset temperature were mainly due to the type and content of the plasticizers [6]. There is only one weight loss step on the TG curve of TPS without citric acid, but two steps on the curves of TPS with citric acid.…”

mentioning

confidence: 99%

“…Specifically, the first weight loss step that started from 150 °C may be due to the heat decomposition of the residual citric acid in TPS with citric acid. The second step was mainly caused by the thermal decomposition of the starch chains [6]. The onset temperatures of the second weight loss steps are strongly related to the interactions between plasticizers and the starch.…”

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confidence: 99%

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The Study of Biodegradable Thermoplastics Sago Starch

Ahmad

Anuar

Yusof

2011

KEM

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Abstract. The motivation of this work is to lessen the dependence on non-degradable plastic packaging which can lead to waste disposal problems. In this paper, the alternative biodegradable material developed by using local available sago starch in the present of biodegradable glycerol as plasticizer, as well as a set of composition added with citric acid as co-plasticizer is reported. Starch was added with 15-30 w/w% of glycerol to prepare workable bioplastics. The samples were characterized by Thermal Gravimetric Analysis (TGA), Fourier Transform Infrared (FTIR) and tested for mechanical properties. The results reveale that, the tensile strength of the bioplastic is increasing with the increasing of glycerol until the optimum amount of 30 w/w%. The similar trend is also observed upon the addition of the citric acid. The decrease of the strength after the optimum point, however is obvious in the specimens with the addition of citric acid which is about 50% lower than the specimen without citric acid.

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confidence: 99%

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The Study of Biodegradable Thermoplastics Sago Starch

Ahmad

Anuar

Yusof

2011

KEM

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“…In order to enable the melting point of the starch polymer to be below its decomposition temperature, thermoplastic starch (TPS) has been developed by gelatinizing the starch with 6-10% plasticizer in the presence of elevated heat and pressure (Bikiaris and Panayiotou, 1998;Hulleman et al, 1998;Ma et al, 2009;Ma and Yu, 2004;RodriguezGonzalez et al, 2004;Sailaja and Seetharamu, 2008 The important characteristics of the materials used in this study are summarized in Table 1. The grafting ratio of MAH in PE-g-MAH was 0.5 wt%, as reported by the commercial producers.…”

Section: Introduction 1)mentioning

confidence: 99%

Effects of a Compatibilizer on the Tensile Properties of Low-Density Polyethylene/Modified Starch Blends

Park¹,

Kim

Moon³

2013

Journal of Environmental Science International

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In this study, thermoplastic starch (TPS), cross-linked starch (CS), and cross-linked starch modified with glycerol (CTPS) were prepared, and the mechanical properties of the compatibilized low-density polyethylene (LDPE) blends (LDPE/TPS, LDPE/CS, and LDPE/CTPS) were investigated and compared with those of uncompatibilized LDPE/TPS, LDPE/CS, and LDPE/CTPS blends. Maleic-anhydride-grafted polyethylene was used as the compatibilizer. The enhanced tensile strength and elongation at break for the compatibilized LDPE/modified starch blends are a result of the improved compatibility between LDPE and the modified starch, which was confirmed by torque measurements and scanning electron microscopy.

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“…Plasticizer also adds prominent features to the composites as it increases the flexibility and tends to reduce the glass transition (Tg) temperature of the matrix (Razavi et al 2015). Glycerol is a highly hygroscopic plasticizer and prevents the brittleness of the films when added in the reaction mixtures (Karbowiak et al 2006;Ma et al 2009). …”

Section: Introductionmentioning

confidence: 99%

Enzyme-treated Wheat Straw-based PVOH Bio-composites: Development and Characterization

Ahmad¹,

Bajwa²,

Iqbal³

2017

BioResources

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Valorization of lignocellulosic waste residues in the development of potential biodegradable composites has been of recent research interest. Recent research has shown that wheat straw can be used as a reinforcement material for the synthesis of novel polyvinyl alcohol (PVOH)-based composites. However, certain pretreatment methodology needs to be used for the selective removal of the lignin component. The delignification of native wheat straw was performed using an in-house isolated ligninolytic consortium. The bio-composites were developed using the de-lignified wheat straw along with PVOH as the matrix phase and glycerol as a plasticizer via a compression molding technique. In this study, a structural analysis by Fourier transform infrared spectroscopy (FT-IR) showed that the enzymatic treatment led to noticeable changes in the chemical structure of the materials used. A dynamic mechanical analysis (DMA) of the composites revealed an increase in the tensile strength of the sample from 46.1 MPa ± 0.1 MPa to 53.0 MPa ± 0.9 MPa, upon the addition of the plasticizer. Also, there was a noticeable increase in the tensile modulus of composites from 2,130 MPa to 4,520 MPa, respectively. Topographical features of the newly synthesized PVOHbased bio-composites were observed using scanning electron microscopy.

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Properties of biodegradable citric acid-modified granular starch/thermoplastic pea starch composites

Cited by 189 publications

References 31 publications

The Study of Biodegradable Thermoplastics Sago Starch

The Study of Biodegradable Thermoplastics Sago Starch

Effects of a Compatibilizer on the Tensile Properties of Low-Density Polyethylene/Modified Starch Blends

Enzyme-treated Wheat Straw-based PVOH Bio-composites: Development and Characterization

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