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

Abral, Hairul; Putra, G.; Asrofi, Mochamad; Park, Ji Won; Kim, Hyun‐Joong

doi:10.1016/j.ultsonch.2017.08.019

Cited by 61 publications

(43 citation statements)

References 27 publications

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“…These include water hyacinth [10][11][12], oil palm empty fruit bunch (OPEFB) [13], banana (pseudo stem), jute (stem) and pineapple leaf fiber [2], arecanut husk fiber [14], kenaf bast (Hibiscus cannabinus) [15], coconut husk [16], Helicteres isora plant [17] and bacterial cellulose [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Production of Nanocellulose from Pineapple Leaf Fibers via High-Shear Homogenization and Ultrasonication

Mahardika

Abral

Kasim

et al. 2018

Fibers

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Abstract:In this study, the isolation and characterization of nanocellulose from pineapple leaf fibers (PLF) were carried out. Chemical pretreatment included pulping, bleaching, and acid hydrolysis to remove lignin, hemicellulose, and extractive substances were conducted. This was followed by high-shear homogenization and ultrasonication to produce nanocellulose. Morphological changes to the PLF due to treatment were investigated using scanning electron microscopy (SEM). This showed that the PLF had a diameter of 1-10 µm after high-shear homogenizing. Transmission electron microscopy (TEM) indicated that the nanofibers after ultrasonication for 60 min showed 40-70 nm diameters. Particle size analysis (PSA) indicates that the fibers had an average diameter of 68 nm. Crystallinity index was determined by X-ray diffraction (XRD) and had the highest value after acid hydrolysis at 83% but after 60 min ultrasonication, this decreased to 62%. Meanwhile, Fourier transform infrared (FTIR) spectroscopy showed there was no chemical structure change after acid hydrolysis. The most significant finding from thermal gravimetric analysis (TGA) is that the higher degradation temperature of nanofibers indicates superior thermal stability over untreated fiber. These results indicate that PLF waste could become a viable source of commercially valuable nanocellulose.

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Section: Introductionmentioning

confidence: 99%

Production of Nanocellulose from Pineapple Leaf Fibers via High-Shear Homogenization and Ultrasonication

Mahardika

Abral

Kasim

et al. 2018

Fibers

Self Cite

186

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“…Brittleness has been reduced by mixing in a plasticizer such as glycerol . To increase tensile strength and water resistance, fillers obtained from natural fibers have been added to starch‐based biopolymers to produce biocomposites . Chen et al reported an improvement of mechanical properties, thermal, and moisture resistance of biocomposites that included cellulose nanoparticles from natural sources.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Tapioca Starch Biopolymer Composites Reinforced with Micro Scale Water Hyacinth Fibers

et al. 2018

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This paper reports on the properties of microscale water hyacinth fiber pulp (WHF) filled tapioca starch biopolymer (TSB) composites. The volume fraction of WHF in the TSB matrix is varied, that is, 1%, 3%, 5%, and 10%. A casting method is used for making sample films of the biocomposites. Scanning electron microscopy (SEM) of the fracture surface of the biocomposite for the tensile samples displays good fiber distribution in the matrix, and interface bonding between WHF and TSB. The 10% fiber biocomposite deliveres the highest value of tensile strength (TS) of 6.68 MPa, and tensile modulus (TM) of 210.95 MPa; however, this combination also has the lowest fracture strain of 7.30%. In this case, there was 549% improvement of TS and 973% of TM in comparison to TSB. The biocomposite with 10% WHF content also showes the highest thermal resistance and the lowest moisture absorption. It shows potential for future commercial applications.

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“…This method is similar to the one reported in more detail in a previous study . TGA and DTG of samples were measured using a thermal analysis instrument (TGA Q500 V20.6, USA).…”

Section: Materials and Experimentsmentioning

confidence: 97%

“…A similar method was used to the one reported in more detail in a previous study . PANalyticalXpert PRO at 25 °C, 40 kV, and 30 mA was used to perform X‐ray diffraction testing.…”

Section: Materials and Experimentsmentioning

confidence: 99%

“…Moisture absorption (MA): A similar method to the one explained in more detail in a previous report was used. All the films from the three different treatments were dried in a drying oven at 40 °C for 24 h until constant weight, then stored in a closed chamber with 75% relative humidity (RH) for 8 h. The samples were taken out after each 30 min and weighed on a precision balance to the nearest 0.1 mg (Kenko).…”

Section: Materials and Experimentsmentioning

confidence: 99%

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Comparative Study of the Physical and Tensile Properties of Jicama (Pachyrhizus erosus ) Starch Film Prepared Using Three Different Methods

et al. 2019

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The objective of this work is to study the physical and tensile properties of jicama (Pachyrhizus erosus) starch film prepared using three different methods. First, a film is prepared from starch granules after sifting using a sieve shaker. A second film is prepared from starch granules after ultrasonication. Another film is made by sonicating the starch gel. Ultrasonication is performed using an ultrasonic probe. These three different methods have a significant effect on the properties of the film (p ≤ 0.05). The film from the starch granules after sifting using 63 μm mesh size and ultrasonication (labeled as S‐63U film) shows the optimum properties. Opacity for S‐63U film is almost half (48.6%) that of the equivalent non‐sonicated film. S‐63U film has the highest tensile strength (3.1 MPa), the lowest moisture absorption (18% after 8 h in a humid chamber) and water vapor permeability. FESEM morphology of the fracture surface of the sonicated film display a more homogeneous structure compared to films without ultrasonication.

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

Cited by 61 publications

References 27 publications

Production of Nanocellulose from Pineapple Leaf Fibers via High-Shear Homogenization and Ultrasonication

Production of Nanocellulose from Pineapple Leaf Fibers via High-Shear Homogenization and Ultrasonication

Characterization of Tapioca Starch Biopolymer Composites Reinforced with Micro Scale Water Hyacinth Fibers

Comparative Study of the Physical and Tensile Properties of Jicama (Pachyrhizus erosus ) Starch Film Prepared Using Three Different Methods

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