서강대학교

초록/요약

Additive Manufacturing simply known as 3D printing is an emerging technology from past thirty years. Since the first patent was expired, lots of concepts and theories have been established and applied to real engineering and science. There are two main streams for additive manufacturing that one is for printing devices and the other one is material. In terms of material, functionalized 3d filament is deadlocked and there are many trials to break this situation. herein we suggest a new concept of functionalized 3D filament which has water purification functions by address nano material or polymer in filament body. To remove heavy metals for examples arsenic, chromium, lead and organic pollutant in water, these kinds of water pollutant occur severe health problem around the world especially developing south-eastern Asian countries. China, Thailand, Cambodia, Viet Nam, etc. The most significant pros of additive manufacturing in-time, resource saving technology. Based on these functionalized 3D filament, we can fabricate any kinds of structures that have adsorption ability which can eliminate water pollutant from water. Actually there are many effective methods for water purification for example reverse osmosis, ion exchange, electro coagulation etc. But these methods require high cost and precise control or operation system. These requirements interrupt to apply on 3D filament. Adsorption technique is the only candidate to apply on 3D filament. Adsorption is the most convenient way to eliminate water pollutant even this has relatively low adsorption efficiency. For fabricating 3D filament, Hot Melt Extrusion (HME) technique is exploited. By using thermoplastics and additives, we can get filament from thermoplastics and functions from additives. In this research, iron(III) oxide and chitosan are used to adsorb arsenic and chromium, lead. Those heavy metal ions have chemical interaction with additives already shown above. Those functionalized 3D filaments have target specific purifying activities and from those 3D filament, we can fabricate any shape of structures which have water purifying ability and this structures are chip and easily fabricated from 3D printers. Not only for water purification, this technique can be applied to another material which is combined to polymer.