Abstract
Abstract Antistatic packaging is a very important sector since the electrostatic discharge of electronic devices can damage and/or disable these products. In addition, it is essential to dispose of this packaging correctly. In this work, the synergistic effect of the addition of lignin and carbon black on the development of antistatic and biodegradable packaging was verified. In this study, PLA was mixed with lignin and carbon black and the composites were prepared using a high-speed thermokinetic homogenizer where the melting of the PLA and the blend with fillers occurred by friction. The composites were characterized by Izod impact tests, scanning electron microscopy, thermal properties, electrical characterization and biodegradation tests in garden soil. The results show that lignin is a great option to accelerate the biodegradation of PLA in the garden soil and the carbon black acts as an antistatic agent reducing the electrical resistivity of the composites.
Highlights
The results show that lignin is a great option to accelerate the biodegradation of Poly(lactic acid) (PLA) in the garden soil and the carbon black acts as an antistatic agent reducing the electrical resistivity of the composites
The compositions 80/10/10 and 75/15/10 presented characteristics of dissipative materials, which is an option for the production of antistatic packaging and present a significant mass loss after 180 days of exposure in garden soil, is a good option for the production of biodegradable packaging
Antistatic and biodegradable packages based on the poly(lactic acid) matrix were successfully obtained due to the synergy of the addition of lignin that acted as a biodegradation agent and carbon black that acted as an antistatic agent
Summary
Antistatic packaging is used for the protection and storageAmong the biodegradable polymers, the poly(lactic of electronic boards and sensitive electronic components[1,2]. acid) (PLA) is one of those that has attracted researchers Conductive carbon black is the most commonly used attention due possesses a variety of desirable properties, antistatic agent for the production of antistatic packaging such as biodegradability, biocompatibility and exhibiting and is intended to increase the electrical conductivity excellent mechanical properties under tensile tests[10,11].(and reduce electrical resistivity) of the packaging so that the electronic devices are not subjected to electrical shocks and are damaged during their transport and storage[3,4,5]. Antistatic packaging is generally composed of polyethylenes[1], polystyrene[7] or polyethylene terephthalate[2] After using these packaging, there is a serious problem of disposal, which generates waste and damages the environment. The biodegradation process consists of physical or chemical modifications, caused by the action of microorganisms, under certain conditions of heat, humidity, light, oxygen and suitable materials nutrients and minerals[8]. Another way to help reduce the amount of plastic waste in the environment is the use of biodegradable polymers
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