Manufacturing and analysis of thermal and chemical properties of potato starch - gelatin biofilms

Download
2012
Yılmaz, Seçil
Today bioplastics, which are defined as environmentally friendly new generation plastics, take place on the market as bags, foam fillers and food tableware. In this study, it was aimed to obtain biodegradable films using starch and gelatin. Thermal, mechanical, permeability and optical properties of films based on potato starch and bovine gelatin plasticized with glycerol and citric acid monohydrate were investigated. Film formulations of different ratios of potato starch to gelatin (1:0, 1:1, 2:1, 1:2, and 0:1) were prepared and casting technique was used as film processing method. In the DSC analysis, one glass transition temperature varying from 69.6 to 91.8ºC for different film formulations was observed, which showed that potato starch and bovine gelatin are compatible. It was determined that blending ratio had an important effect on the mechanical properties. Tensile strength, elongation at break and Young’s modulus was found to be between 2.21-15.60 MPa, 93-130% and 14.20-151.50 MPa, respectively. The findings of this study showed that gelatin addition significantly increased the mechanical durability. The water vapor permeability of films ranged from 0.022x10-10 to 0.061x10-10 g.m-1.s-1.Pa-1 and significantly depended on the blending ratio. It was determined that the films contained gelatin had lower water vapor permeability. It was observed that the blending level has an important effect on the opacity values of films with an opacity-decreasing effect of gelatin. It was also found that storage conditions affected the optical stability. Storage at 40ºC increased the opacity whereas storage at room temperature, +4ºC, and -20ºC had an opposite effect.

Suggestions

Preparation of antimicrobial films from agricultural biomass
Seber, Ayşe Gizem; Bakır, Ufuk; Department of Biotechnology (2010)
Mainly used food packaging materials are petro-chemical based polymers which present environmental problems since they are not biodegradable and ecologically sustainable. In this study, biodegradable biofilms are produced from xylan, extracted from cotton stalk which is an agricultural biowaste without nutritional value. Antimicrobial property was given to the biofilms with either titanium dioxide sol-gel coatings or titanium dioxide powder addition into the biofilm forming solutions. The antimicrobial acti...
Production of valuable chemicals from plastic wastes containing polyethylene and polypropylene
Habib, Abdul Rehman Rajabali; Sezgi, Naime Aslı; Department of Chemical Engineering (2019)
Global plastic consumption has significantly increased recently creating a serious environmental threat due to the non-biodegradability of plastics. Disposal methods like landfilling and incineration result in soil pollution and emission of toxic gases, respectively. Thus the catalytic thermal degradation of plastic offers a safer and economical alternative. In this study, aluminium and/or tungstophosphoric acid (TPA) loaded silica aerogel was used in the pyrolysis of polyethylene and polypropylene. The sil...
Characterization of curcumin incorporated guar gum/orange oil antimicrobial emulsion films
Aydogdu, Ayca; Radke, Clayton J.; Bezci, Semih; Kırtıl, Emrah (Elsevier BV, 2020-04-01)
Edible films are manufactured from natural, renewable, nontoxic, and biodegradable polymers and are safe alternatives to plastic food packaging. Despite ongoing research, biopolymer-based edible films still are not at a quality to ensure total commercial replacement of synthetic packaging materials. The study aims to compare the effectiveness of some novel methods employed to improve edible film properties. These include dispersion of orange oil (1% & 2% v/v) and/or curcumin into guar gum (GG), glycerol and...
Nanostructured poly(lactic acid)/soy protein/HPMC films by electrospinning for potential applications in food industry
Aydogdu, Ayca; Yıldız, Eda; Ayhan, Zehra; Aydoğdu, Yıldırım; Şümnü, Servet Gülüm; Şahin, Serpil (2019-03-01)
As an alternative to oil based materials, there is a demand for easily degradable packaging materials. With this regard, the objective of this study is to produce bilayer nanofiber sheets composed of Poly (lactic acid) (PLA) and soy protein, hydroxypropyl methylcellulose (HPMC) and combination of them by using electrospinning. In addition, it was aimed to analyze morphological, optical, thermal properties of films and investigate permeability characteristics. Homogenous nanofibers were successfully collecte...
INVESTIGATION OF DESORPTION KINETICS AND EQUILIBRIUM OF AN ANIONIC DYE FROM MAGNETIC POLYMER ADSORBENTS
Akın, Deniz; Yakar, Arzu; Gündüz, Ufuk (2015-09-03)
Dyes, which are used in different industries such as paper, plastics, leather, pharmaceutical, food, cosmetics, textiles, etc., constitute a major class of environmental pollutants. In recent studies, magnetic adsorbents combining magnetic separation technology with the adsorption process has been used to remove dyes from industrial wastewaters. The main advantages of the adsorbents are possible to be easily and simply separated from process media in a short time using the external magnetic field and will b...
Citation Formats
S. Yılmaz, “Manufacturing and analysis of thermal and chemical properties of potato starch - gelatin biofilms,” M.S. - Master of Science, Middle East Technical University, 2012.