A simple method for improving the properties of the sago starch films prepared by using ultrasonication treatment

Abstract

Starch granules containing amylopectin-rich fractions like sago starch may remain insoluble and undamaged decreasing properties of the film. The aim of this study is to characterize native sago starch films prepared using ultrasonication. An ultrasonication probe was used during gelatinization for 2.5, 5, and 10 min respectively. Ultrasonication decreases the incomplete gelatinized granules resulting in a film with a more compact structure, and lower moisture vapor permeability than non-treated film. The longest duration resulted in a film with the highest transparency, and the highest thermal resistance. The duration for 5 min increased tensile strength of the film by 227%, and its moisture absorption decreased by 29.83% compared to non-sonicated film. After ultrasonication for 10 min, melting temperature increased by 7% in comparison to non-sonicated film. This work promotes a simple method to improve the tensile and physical properties of starch based film.

Simultaneously electrochemical exfoliation and functionalization of graphene nanosheets: Multifunctional reinforcements in thermal, flame‐retardant, and mechanical properties of polyacrylonitrile composite fibers

“…Notably, in comparison with DGNS, FGNS showed a broad peak of PO group and the peak location shifted to a lower wavenumber (1064.0 cm −1 ), which was attributed to the interaction between Fe 3+ and DTPMP. In addition, all samples exhibited the major peaks at 1384 cm −1 ( v C ─ O stretching), 1630 to 1640 cm −1 ( v C  C , strong aromatic skeletal vibration), and 3420 to 3450 cm −1 ( v ─ OH stretching) . The nonexistence of characteristic peak of CO stretching vibration (1720‐1740 cm −1 ) indicated the low oxidation degree of graphene nanosheets which was manufactured by electrochemical exfoliation.…”

“…In addition, all samples exhibited the major peaks at 1384 cm −1 (v C ─ O stretching), [29] 1630 to 1640 cm −1 (v C C , strong aromatic skeletal vibration), and 3420 to 3450 cm −1 (v─ OH stretching). [30,31] The nonexistence of characteristic peak of C O stretching vibration (1720-1740 cm −1 ) [32] indicated the low oxidation degree of graphene nanosheets which was manufactured by electrochemical exfoliation. Figure 5A shows the XPS and the corresponding elemental composition of graphite, DGNS and FGNS.…”

Sugar palm (Arenga pinnata [Wurmb.] Merr) starch films containing sugar palm nanofibrillated cellulose as reinforcement: Water barrier properties

“…Along with growing environmental awareness, it has urged the plastic manufacturing industry to look for alternatives and immediate solutions. [1][2][3][4][5][6][7] In addition, the implementation of the conventional petroleum-based polymer also created numerous issues such as environmental sustainability and material accessibility. [8][9][10][11][12] In order to cater to this problem, many natural biopolymers were introduced such as starch, polylactic acid (PLA), and polyhydroxyalkanoates (PHAs) to be used as a potential candidate to replace the existing conventional plastic in the packaging sector.…”

Degradation and physical properties of sugar palm starch/sugar palm nanofibrillated cellulose bionanocomposite

“…uted by non-biodegradable petroleum-based polymeric materials [1,2]. Among various types of renewable polymers, starch is one of the most widely used and favorable materials for biodegradable plastic due to its low cost and high availability [3][4][5]. In the last decade, the thermoplastic starch, or plastic starch (PS), has gained attention and offered an attractive alternative to petroleum-based polymers when long-term biodegradation is unnecessary and rapid degradation is needed [6,7].…”