Utilization of Polyethileneterephtolate Waste Unfit for Natural Decomposition
New Methods of Utilization of Polyethileneterephtolate Waste Unfit for Natural Decomposition
Tech Area / Field
- CHE-POL/Polymer Chemistry/Chemistry
- ENV-SPC/Solid Waste Pollution and Control/Environment
3 Approved without Funding
AO Kompozit, Russia, Moscow reg., Korolev
- VNIITF, Russia, Chelyabinsk reg., Snezhinsk\nMISIS (Steel and Alloys), Russia, Moscow
- Lawrence Livermore National Laboratory, USA, CA, Livermore
Project summaryOne of the most significant problems of modern civilization is the problem of solid household and industrial waste utilization, in particular, utilization of polyethileneterephthalate (PET) unfit to natural decomposition.
On the other hand, development of various fields of engineering including mechanical engineering, electrical and building industry, production of consumer goods etc. is in need of a wide scale of composite materials. Composite materials (composites) are characterized by the type of their matrix. The most widespread modern composites have metallic matrix (MMC) or ceramic one (CMC). These composites belong to relatively expensive materials.
The subject of this project is development of the novel composite material consisting of polyethyleneterephthalate (PET) as the binding matrix and one or more various filling components i.e. wood sawdust and other woodworking waste, textile manufacture waste, some kinds of food industry waste such as sunflower husk determining basic mechanical, electrical, physical-chemical and other functional properties of the material being developed. Let us mark such composite materials as PETMC.
The most significant feature of this project is choosing for the binding matrix not the primary PET but the secondary one. It is obtained by cutting up used articles made of PET (bottles, glasses and so on) and PET-articles production waste to very small particles. Extermination of such waste is now one of the most significant problems of environment protection since natural decomposition of PET is impossible and utilization of this material for any purpose does not have any principal or practical solution. PETMC solves this problem.
The novel materials of PETMC group are produced by thermal working combined with compaction of mixture of the binding material with a filling compound. Compaction has being carried out at sufficiently high levels of pressure and reduction.
The main advantages of PETMC are the following: high strength and hardness (at the level of soft metals), high wear resistance, very low water absorption, low thermal conductivity, high dielectric properties. Such material seems to be very prospective for consumers in mechanical engineering, electrical and building industry and some other fields.
The essential feature of PETMC is its cheapness because both binding material (PET bottles) and most of filling materials (wood sawdust, glassy breakage etc.) are household and industrial waste. As a matter of fact, this project presents one of the novel and urgent trends both in utilization of solid waste and development of resource-saving technologies.
The most prospective filling materials forming PETMC in mixture with PET are the following ones:
– Wood sawdust, which enables to produce materials having high decorating and service properties for building industry and high dielectric properties for electrical industry.
– Glassy breakage, sand, gravel, which enables to produce materials having high strength and hardness and capable to substitute traditional components of concrete and bricks in building industry. Additionally, these materials can be reinforced by metal components such as wire netting, rods or filling wedges, which increases their consumer characteristics.
PETMC performance characteristics depends on the values of temperature, pressure and deformation while shaping articles of it. These dependencies along with possibilities to obtain required shape, surface quality and complex of performance characteristics including radiation effects are the subject of detailed studies.
The scientists and the specialists of the executors of project have been working for many years on the problems of creation of novel composite materials by means of high pressure and severe deformations. The chief of the group is a member of the Russian Academy of Natural Sciences and leading expert in the fields materials science and plastic deformation of materials. The group consists of skilled specialists having experience in scientific trainee at the leading scientific centers of the USA, Germany and Japan. It proves high scientific level of the research group and assures success in fulfilling the project.
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