Comparative Study of the Physical and Tensile Properties of Jicama (Pachyrhizus erosus) Starch Film Prepared Using Three Different Methods. (27th February 2019)

• Record Type: Journal Article
• Authors: Abral, Hairul; Soni Satria, Riyan; Mahardika, Melbi; Hafizulhaq, Fadli; Affi, Jon; Asrofi, Mochamad; Handayani, Dian; Sapuan, Salit M.; Stephane, Ilfa; Sugiarti, Eni; Muslimin, Ahmad Novi
• Is Part Of: Stärke. Volume 71:Number 5/6(2019)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-02-27
• Subjects: ANOVA -- bioplastics -- starch -- ultrasonication; Starch -- Periodicals; 572.566
• DOI: 10.1002/star.201800224
• Languages: English
• ISSNs: 0038-9056

Abstract

Abstract : 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. Abstract : Without ultrasonication, lower tensile, and physical properties of starch film appear due to the non‐homogeneous structure of the film. After ultrasonication this defect reduces, so it results in better properties of starch film such as higher tensile strength, higher vapor barrier and moisture resistance, and higher transparency. Ultrasonication of starch granule surfaces produces the best properties of the film.