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Studies on the Physico-chemical Properties, Fatty Acid Compositions of Petuli (trewia Nudiflora Linn.) Seed Oil and Its Application for the Preparation of Water Proof Silk Cloth

M.A. Khaleque
Bangladesh Council of Scientific and Industrial Research Laboratories (BCSIR), Rajshahi-6206

M.A. Islam
Bangladesh Council of Scientific and Industrial Research Laboratories (BCSIR), Rajshahi-6206

Dbashish Talukder
Bangladesh Council of Scientific and Industrial Research Laboratories (BCSIR), Rajshahi-6206

M.A. Hye
Bangladesh Council of Scientific and Industrial Research Laboratories (BCSIR), Rajshahi-6206

Abstract/ Executive Summary:

Studies were carried out on the physico-chemical properties, fatty acid compositions of petuli seed oil and its application for the preparation of waterproof silk cloth. The physcio-chemical properties of the oil were studied by the conventional methods and fatty acid compositions by GLC. The results revealed that the oil could be used suitably for the preparation of waterproof silk cloth, because of its higher iodine value (148) and the unsaturated fatty acid component α-eleostearic acid (38.50%) content. The prepared waterproof silk cloth was found to be waterproof after immersed in water.

Keywords: Petuli seed oil, Physico-chemical properties, GLC, Fatty acid, Water proof silk cloth

Location: BCSIR Laboratories, Rajshahi

Start Date:

End Date:

Program Area: Resource Development and Management

Commodity: Silk cloth

Objectives:

1. The objectives of the studies is on the physico-chemical properties, fatty acid composetions of petuli seed oil and its application for the preparation of water proof silk cloth.

Methodology:

The experimental work has been done at BCSIR Laboratories, Rajshahi. Ripe mature petuli seeds were procured from locally. The seeds were then di-shelled manually and the kernals thus obtained were crushed into smaller particles in an iron mortar and dried in the oven at a temperature of 105°C. The oil was then extracted in a soxhlet apparatus using the solvent ethyl acetate for 8 hours. The extracted solvent was removed by a rotary vacuum evaporator under reduced pressure and calculated the percentage of the oil. The specific gravity of the oil was determined at 28°C with the help of a phycnometer. Refractive index, moisture and volatile matters in the oil were determined by the Standard IUPAC method. The percentage of free fatty acid (as oleic) saponificaiton value, iodine value, peroxide value and unsaponifiable matter in the oil were also determined by the Standard AOCS method. Hanus method was followed to determine the iodine value of the oil. Analysis of fatty acid compositions - Fatty acid compositions of the petuli seed oil were analyzed as their methyl esters which was prepared by the Bron-trifloride methanol method. Analysis was carried out by a GCD-Pye Unicom Gas liquid Chromatographic instrument equipped with a flame ionization detector. Nitrogen carrier gas was used at a flow rate of 25 ml/min. The column was operated isothermally at 190°C. The inzector and detector temperature was maintained at 230°C for all GLC analysis. Gas Chromatographic peaks were identified by comparison with standard methyl esters with respect to retention time against equivalent carbon length. The peak areas were determined by multiplying peak height by peak width at half height. The percentage of each peak was calculated as the percentage of the total area of all the peaks. Preparation of waterproof silk cloth - 100-g petuli seed oil was taken in the experiment. One part of the experiment, 50g petuli seed oil was taken in conical flax and dissolved the oil by adding 50ml ethylacetate. Then the other part of the experiment, the rest 50g petuli seed oil was taken in conical flax and 2% sebacid acid at the weight of oil taken was added with it and shaked well. Now the above two experiments were mixed together and shaked well. The product thus obtained which was then sprayed on silk cloth and dried the cloth.

Source of Information: BANGLADESH RESEARCH PUBLICATIONS JOURNAL; ISSN: 1998-2003, Volume: 7, Issue: 3, Page: 220-222, September - October, 2012

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Petuli tree bears a lot of fruits. Its seed is wasted every year in huge quantity although it is a good source of non-edible (22%) oil. It helps to bridge the oil gap in the country. From the fatty acid analysis, it is found that the amount of unsaturated fatty acid α-eleostearic acid is high. So the oil may be considered as a good source of unsaturated fatty acid. Moreover for its higher iodine value and α-eleostearic acid contain the oil may be used for the preparation of waterproof silk cloth.

Knowledge Management: Journal