Syukri Arief

FTIR and Moisture Absorption of Yam Bean Starch Biocomposites with Yam Bean (Pachyrhizus erosus) Bagasse Fibers as Reinforcement

Biocomposites from yam bean starch with yam bean bagasse (YBB) fibers as reinforcement has been successfully fabricated. The fabrication method was solution casting. YBB was variated for 1, 2, 3 and 4wt% (from dry weight starch basis). 2 mL glycerol was used as a plasticizer. The relative humidity (RH) condition in moisture testing was 99%. The result shows that the addition YBB able to decreased moisture absorption of starch film. The lowest moisture absorption was in biocomposites with 4wt% YBB. The moisture absorption test was supported byfourier transform infrared (FTIR) data.

Biodegradable Plastic of Jicama Starch ( Pachyrhizus Erosus ) With Precipitate Calcium Carbonate as A Filler

Jicama plants (Pachyrhizus erosus) is a plant that produces tuber root, with a rounded shape like a top. The results of the analysis showed 100 g Jicama calories 55 calories, 15 mg calcium, 18 mg phosphorus, 85.1 grams of water and 12.8 grams of carbohydrates, so it can be developed into a biodegradable plastic. Adding PCC 1% on Jicama starch increase stiffness of the plastic, and a more flexible and elastic. Results obtained in the form of a thin sheet of plastic that have been tested so that the mechanical properties obtained test data variables optimum thickness is 0.46 mm, pH 7.25, Total Plate Count TBUD > 3.0 x 10-1, biodegradation tests in soil 20 days 22, 55 %, 40 days 52.60 %, 81.40 % 60 days and biodegradation tests on the water 20 days 23.56 %, 28.89 % 40 days, 60 days 52.05 %.