Mechanical, barrier and morphological properties of starch nanocrystals-reinforced pea starch films

Li, Xiaojing; Qiu, Chao; Ji, Na; Sun, Cuixia; Xiong, Liu; Sun, Qingjie

doi:10.1016/j.carbpol.2014.12.040

Cited by 160 publications

(107 citation statements)

References 46 publications

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“…The supposedly formed hydrogen bond will require more energy for melting. The melting temperatures of the films modified with stearic acid are within values previously reported for pea starch films modified with corn starch nanocrystals (Li and others ), and potato starch films modified with stearic acid (Liu and others ).…”

Section: Resultssupporting

confidence: 87%

Physicochemical and Mechanical Properties of Bambara Groundnut Starch Films Modified with Stearic Acid

Oyeyinka

Singh

Amonsou

2016

Journal of Food Science

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The physicochemical and mechanical properties of biofilm prepared from bambara starch modified with varying concentrations of stearic acid (0%, 2.5%, 3.5%, 5%, 7%, and 10%) were studied. By scanning electron microscopy, bambara starch films modified with stearic acid (≥3.5%) showed a progressively rough surface compared to those with 2.5% stearic acid and the control. Fourier transform infrared spectroscopy spectra revealed a peak shift of approximately 31 cm , suggesting the promotion of hydrogen bond formation between hydroxyl groups of starch and stearic acid. The addition of 2.5% stearic acid to bambara starch film reduced water vapor permeability by approximately 17%. Bambara starch films modified with higher concentration of stearic acid were more opaque and showed significantly high melting temperatures. However, mechanical properties of starch films were generally negatively affected by stearic acid. Bambara starch film may be modified with 2.5% stearic acid for improved water vapor permeability and thermal stability with minimal effect on tensile strength.

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Section: Resultssupporting

confidence: 87%

Physicochemical and Mechanical Properties of Bambara Groundnut Starch Films Modified with Stearic Acid

Oyeyinka

Singh

Amonsou

2016

Journal of Food Science

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“…However, the L/D ratio for SNs was far smaller than the former value [10], and the SNs looked like round particles and a decrease of elongation with the increase of SNA in the matrix was observed. Furthermore, higher SNA loading level resulted in a decrease of the elongation due to the self-aggregation of SNA, and similar results were reported by other authors [16,21,22,30]. The above results indicated that there might be an underlying structure whose formation controls the tensile performance evolution with SNA content.…”

Section: Tensile Testssupporting

confidence: 89%

Preparation and Properties of Cellulose Laurate (CL)/Starch Nanocrystals Acetate (SNA) Bio-nanocomposites

Huang

et al. 2015

Polymers

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Abstract:In the present paper, a series of totally novel bio-nanocomposite films from cellulose laurate (CL) and starch nanocrystals acetate (SNA) were fabricated, and the properties of nanocomposite films were investigated in detail. SNA was obtained by modifying starch nanocrystals (SNs) produced by sulfuric acid hydrolysis of corn starch with acetic anhydride. The favorable dispersity of SNA in chloroform made it ready to convert into nanocomposite films with CL via casting/evaporation method. The transmittance, thermal behavior, mechanical properties, barrier properties and hydrophobicity of CL/SNA nanocomposite films were investigated with UV-vis spectrophotometer, simultaneous thermal analyzer (STA), universal tensile tester/dynamic thermomechanical analysis (DMA), water vapor permeation meter/oxygen permeability tester, and contact angle tester, respectively. The transmittance of nanocomposite films decreased with the increase of SNA content. Thermogravimetric analysis (TGA) results showed that the introduction of SNA into CL matrix did not severely decrease the thermal behavior of CL/SNA nanocomposites. Moreover, non-linear and linear mechanical analysis reflected the enhancement of SNA. At lower contents of SNA (<5.0 wt%), the values of Young's modulus, tensile strength and the elongation at break of nanocomposite films were comparable with those of neat CL. However, with the increase of SNA, the Young's modulus and tensile strength were improved significantly and were accompanied by the decreased elongation at break. The water vapor OPEN ACCESSPolymers 2015, 7 1332 permeability (WVP) and oxygen permeability (PO 2 ) of CL/SNA nanocomposite films were significantly improved by the addition of SNA.

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“…However, this bioplastic has low mechanical properties, and absorbs high moisture. Various attempts have been made previously to improve the mechanical properties and the resistance to water vapor [1,2]. Last work reported that mixing nanofibers as well as nanoparticle in starch base bioplastic improved the mechanical properties and the resistance in water vapor absorption [3].…”

Section: Introductionmentioning

confidence: 99%

Effect of vibration duration of high ultrasound applied to bio-composite while gelatinized on its properties

Abral

Putra

Asrofi

et al. 2018

Ultrasonics Sonochemistry

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A B S T R A C TThis article reports effect of vibration duration of high ultrasound applied to bio-composite while gelatinized on its properties. The bio-composite consists of mixing of both the tapioca starch based bioplastic and oil palm empty fruit bunch (OPEFB) fibers with high volume fraction. Gelatinization of the bio-composite sample was poured into a rectangular glass mold placed then in an ultrasonic bath with 40 kHz, and 250 watt in different duration for 0, 15, 30, 60 min respectively. The results show that vibration during gelatinization has changed the characterisation of the bio-composite. SEM photograph displayed different fracture surface of tensile sample. For vibration duration of 60 min, tensile strength (TM), and tensile modulus (TM) was improved to 64.4, 277.4%, respectively, meanwhile strain was decreased to 35.1% in comparison without vibration. Fourier Transform Infrared Spectroscopy (FTIR), and XRD diffraction of the bio-composite has changed due to various vibration duration. Moisture absorption of the vibrated bio-composite was lower than that of the untreated one.

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Mechanical, barrier and morphological properties of starch nanocrystals-reinforced pea starch films

Cited by 160 publications

References 46 publications

Physicochemical and Mechanical Properties of Bambara Groundnut Starch Films Modified with Stearic Acid

Physicochemical and Mechanical Properties of Bambara Groundnut Starch Films Modified with Stearic Acid

Preparation and Properties of Cellulose Laurate (CL)/Starch Nanocrystals Acetate (SNA) Bio-nanocomposites

Effect of vibration duration of high ultrasound applied to bio-composite while gelatinized on its properties

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