جستجوی مقالات مرتبط با کلیدواژه « biodegradable » در نشریات گروه « صنایع چوب و کاغذ »

Due to the importance of safe packaging for food products, researchers and manufacturers are seeking suitable solutions for this type of packaging. Smart packaging of food indicates the health or spoilage of the food inside the package. The use of biodegradable materials in food packaging is also important due to the lack of environmental pollution. In this study, eucalyptus pulp was first converted to microfibrillated cellulose using a Masuko disk mill. To prepare the microfibrillated cellulose/gum arabic gel, a gum arabic solution at 10 and 20% (v/v) was added to the eucalyptus pulp instead of water and passed through the Masuko mill. Glycerol was used as a plasticizing agent at 37% of the dry weight of the pulp. Films with different compositions were then prepared using a molding method and were analyzed using Fourier-transform infrared spectroscopy (FTIR). Additionally, the tensile strength of the films was evaluated. Biodegradability testing was also conducted using a soil burial method. Finally, the intelligence of the films was assessed using a buffer solution with a pH range of one to thirteen. The research results showed that the resulting films are completely environmentally friendly and decompose almost entirely after about a month. Films containing gum arabic extract decomposed slightly later due to the presence of antimicrobial substances. The intelligence testing results also indicated that gum arabic extract can be used as an indicator of food spoilage in packaging.

The purpose of this study was to evaluate the biodegradability of composites made from bamboo flour and poly lactic acid using physical properties and biodurability examinations. On the other hand, the effect of the amount and size of the bamboo flour particles on the physical properties and durability of the biocomposites was another objective of the research. the bamboo flour and polymer were mixed up in a counter-rotating twin screw extruder. the biocomposites boards were produced by compression molding method. The samples were cut and evaluated according to the suggested specifications in the ASTM and EN-113 standards. The results showed that the thickness swelling and water absorption of the composites were increased significantly by increasing the amount and size of bamboo flour particles. Also, biodurability of the biocomposites samples against the studied three fungi species showed that Gloeophyllum trabeum sharply caused high mass losses in all samples by increasing the amount of bamboo flour, while pure polymer (PLA) had a very high durability against the fungi.