Mechanical and Light Transmittance Properties of Locust Bean Gum Based Edible Films

Meltem AYDINLI; Mehmet TUTAŞ; Ö. Altan BOZDEMİR

Article Details

Mechanical and Light Transmittance Properties of Locust Bean Gum Based Edible Films

Authors:

Meltem AYDINLI | Mehmet TUTAŞ | Ö. Altan BOZDEMİR

Publisher:

TUBITAK

Journal:

Turkish Journal of Chemistry 2004 Vol.28 Issue 2, pp.163-172

Document Type:

Article

Publication Date:

1/2004

Document Language:

Turkish

Document ID (Org No.):

2000729364

Frequency:

Bimonthly

eISSN:

1303-6130

pISSN:

1300-0527

Abstract:

 

The behavior of locust bean gum (LBG) under heat was  investigated by thermogravimetric (TG), differential thermogravimetric  (DTG) and differential scanning calorimetric (DSC) methods.  It was  observed from the TG, DTG and DSC curves that LBG does not melt and is  stable up to 300 °C, although exothermic degradation occurs at higher  temperatures.  The effect of the amount and molecular weight of  polyethylene glycol (PEG) on the light transmittance and mechanical  properties of these edible films was also examined.  Haze increased  and the luminous transmittance and total light transmittance values  decreased with both the quantity and molecular weight of PEG. On the  other hand, tensile strength and elongation decreased, but there was  no regular relationship between the molecular weight of the PEG and  the tensile strength of the films.  It was concluded from the results  of the mechanical and optical measurements that the most suitable  plasticizer among the PEG plasticizers with different molecular  weights is PEG 200 and that the maximum level for its use is 0.6  mL/0.7 g LBG in edible film formulations.

 

The behavior of locust bean gum (LBG) under heat was  investigated by thermogravimetric (TG), differential thermogravimetric  (DTG) and differential scanning calorimetric (DSC) methods.  It was  observed from the TG, DTG and DSC curves that LBG does not melt and is  stable up to 300 °C, although exothermic degradation occurs at higher  temperatures.  The effect of the amount and molecular weight of  polyethylene glycol (PEG) on the light transmittance and mechanical  properties of these edible films was also examined.  Haze increased  and the luminous transmittance and total light transmittance values  decreased with both the quantity and molecular weight of PEG. On the  other hand, tensile strength and elongation decreased, but there was  no regular relationship between the molecular weight of the PEG and  the tensile strength of the films.  It was concluded from the results  of the mechanical and optical measurements that the most suitable  plasticizer among the PEG plasticizers with different molecular  weights is PEG 200 and that the maximum level for its use is 0.6  mL/0.7 g LBG in edible film formulations.

Article Details

Mechanical and Light Transmittance Properties of Locust Bean Gum Based Edible Films

Authors: Meltem AYDINLI | Mehmet TUTAŞ | Ö. Altan BOZDEMİR

Publisher: TUBITAK

Journal: Turkish Journal of Chemistry 2004 Vol.28 Issue 2, pp.163-172

Document Type: Article

Publication Date: 1/2004

Document Language: Turkish

Document ID (Org No.): 2000729364

Frequency: Bimonthly

eISSN: 1303-6130

pISSN: 1300-0527

Issues

Authors:

Meltem AYDINLI | Mehmet TUTAŞ | Ö. Altan BOZDEMİR

Publisher:

TUBITAK

Journal:

Turkish Journal of Chemistry 2004 Vol.28 Issue 2, pp.163-172

Document Type:

Article

Publication Date:

1/2004

Document Language:

Turkish

Document ID (Org No.):

2000729364

Frequency:

Bimonthly

eISSN:

1303-6130

pISSN:

1300-0527