scholarly journals DEVELOPMENT OF 3D PRINTING RAW MATERIALS FROM PLASTIC WASTE

2019 ◽  
Author(s):  
Alaeddine Oussai ◽  
◽  
Zoltán Bártfai ◽  
László Kátai ◽  
István Szalkai ◽  
...  
Keyword(s):  
3D Printing ◽  
Raw Materials ◽  
Plastic Waste

scholarly journals Development of 3D printing raw materials from plastic waste

2020 ◽  
pp. 34-40
Author(s):  
A. Oussai ◽  
László Kátai ◽  
Zoltán Bártfai
Keyword(s):  
3D Printing ◽  
Raw Materials ◽  
Plastic Waste

The use of plastic waste as carbon raw materials to obtain TiC-based powders

2021 ◽  
Author(s):  
A.E. Matveev ◽  
P. Yu. Nikitin ◽  
I.A. Zhukov ◽  
A.S. Zhukov
Keyword(s):  
Raw Materials ◽  
Plastic Waste

scholarly journals Plastics waste management: A review of pyrolysis technology

2021 ◽  
Vol 1 (1) ◽  
pp. 50-69
Author(s):  
Wilson Uzochukwu Eze ◽  
◽  
Reginald Umunakwe ◽  
Henry Chinedu Obasi ◽  
Michael Ifeanyichukwu Ugbaja ◽  
...  
Keyword(s):  
Chemical Process ◽  
Liquid Fuel ◽  
Closed Loop ◽  
Raw Materials ◽  
Chemical Processes ◽  
Plastic Waste ◽  
Waste Plastics ◽  
The World ◽  
Pyrolysis Liquid ◽  
Life Options

<abstract> <p>The world is today faced with the problem of plastic waste pollution more than ever before. Global plastic production continues to accelerate, despite the fact that recycling rates are comparatively low, with only about 15% of the 400 million tonnes of plastic currently produced annually being recycled. Although recycling rates have been steadily growing over the last 30 years, the rate of global plastic production far outweighs this, meaning that more and more plastic is ending up in dump sites, landfills and finally into the environment, where it damages the ecosystem. Better end-of-life options for plastic waste are needed to help support current recycling efforts and turn the tide on plastic waste. A promising emerging technology is plastic pyrolysis; a chemical process that breaks plastics down into their raw materials. Key products are liquid resembling crude oil, which can be burned as fuel and other feedstock which can be used for so many new chemical processes, enabling a closed-loop process. The experimental results on the pyrolysis of thermoplastic polymers are discussed in this review with emphasis on single and mixed waste plastics pyrolysis liquid fuel.</p> </abstract>

scholarly journals Exploring traditional thread-making and simple weaving used in OPP lamination film upcycling for ecologically responsible textile craft

2021 ◽  
Vol 905 (1) ◽  
pp. 012030
Author(s):  
R E Santoso ◽  
L A Utami
Keyword(s):  
Design Education ◽  
Design Research ◽  
Raw Materials ◽  
Plastic Waste ◽  
Raw Material ◽  
Environmental Care ◽  
Traditional Technology ◽  
Cradle To Cradle ◽  
Craft Community ◽  
Woven Textile

Abstract Aiming for sustainable eco-friendly craft/design practice, this design research explored upcycling-practice of OPP plastic waste using traditional technology to create an alternative raw material for textile craft. By combining cultural investigation into the textile-making tradition with Cradle-to-Cradle design principles, we identified the potential of traditional technology as an ecologically responsible production process. We also developed upcycling method to process OPP plastic waste material. This research resulted in: (1) thread-making techniques that produce different sizes of thread as raw materials and hand-woven textile, (2) revitalized endangered indigenous technology of craft-making that had been a part of human-nature ecology, (3) eco-design education that can be accepted by local textile craft community, and (4) textile craft products that express the local identity and promote environmental care.

scholarly journals AN EFFECTIVE WAY TO RECYCLE 3D PRINTING CONCRETE SCRAP

2021 ◽  
Vol 4 (2) ◽  
pp. 12-18
Author(s):  
D.A. Tolypin ◽  
N. Tolypina
Keyword(s):  
Compressive Strength ◽  
3D Printing ◽  
Portland Cement ◽  
Quartz Sand ◽  
Raw Materials ◽  
Electricity Consumption ◽  
Cement Matrix ◽  
Fine Aggregate ◽  
Fine Grained ◽  
Control Samples

the article proposes a rational method for processing 3D printing concrete scrap using vibration equipment, which allows obtaining a multicomponent building material with minimal electricity consumption. As a crite-rion for the degree of grinding of concrete scrap, it is proposed to use the specific surface area of the finely dispersed part of concrete scrap, which should correspond to 400-500 m2/kg. The possibility of reusing the resulting product instead of the traditional fine aggregate of quartz sand is shown. It was found that the con-crete scrap without the addition of Portland cement hardens, reaching up to 48% of the compressive strength of the control samples by 28 days. When 10% of the binder CEM I 42.5 N was added to the concrete scrap processing product, the compressive strength of fine-grained concrete increased by 106.6%, and 20% of Portland cement - by 112.2 %, compared to the strength of control samples of a similar composition on tra-ditional quartz sand after 28 days of hardening. It is noted that this is primarily due to the weak contact zone of quartz sand and the cement matrix of concrete. The use of the product of processing concrete scrap al-lows obtaining building composites based on it with the complete exclusion of natural raw materials

scholarly journals Structural and Textural Characteristics of 3D-Printed Protein- and Dietary Fibre-Rich Snacks Made of Milk Powder and Wholegrain Rye Flour

Foods ◽  
2020 ◽  
Vol 9 (11) ◽  
pp. 1527 ◽  
Author(s):  
Martina Lille ◽  
Anni Kortekangas ◽  
Raija-Liisa Heiniö ◽  
Nesli Sozer
Keyword(s):  
3D Printing ◽  
Dietary Fibre ◽  
Raw Materials ◽  
Milk Powder ◽  
Rye Flour ◽  
Whole Milk ◽  
3D Printed ◽  
Shape Retention ◽  
Micro Tomography ◽  
Snack Products

This study addressed the potential of 3D printing as a processing technology for delivering personalized healthy eating solutions to consumers. Extrusion-based 3D printing was studied as a tool to produce protein- and dietary fibre-rich snack products from whole milk powder and wholegrain rye flour. Aqueous pastes were prepared from the raw materials at various ratios, grid-like samples printed from the pastes at ambient temperature and the printed samples post-processed by oven baking at 150 °C. Printing pastes were characterized by rheological measurements and the baked samples by X-ray micro tomography, texture measurements and sensory analysis. All formulations showed good printability and shape stability after printing. During baking, the milk powder-based samples expanded to a level that caused a total collapse of the printed multiple-layer samples. Shape retention during baking was greatly improved by adding rye flour to the milk formulation. Sensory evaluation revealed that the volume, glossiness, sweetness and saltiness of the baked samples increased with an increasing level of milk powder in the printing paste. A mixture of milk powder and rye flour shows great potential as a formulation for healthy snack products produced by extrusion-based 3D printing.

Preparation and Characterization of Bio-Degradable Plastic from Banana Kepok Peel Waste

2020 ◽  
Vol 981 ◽  
pp. 132-137
Author(s):  
Suharno Rusdi ◽  
Ridwan A. Destian ◽  
Fitratur Rahman ◽  
Achmad Chafidz
Keyword(s):  
Water Resistance ◽  
Raw Materials ◽  
Human Life ◽  
Base Material ◽  
High Water ◽  
Plastic Waste ◽  
Banana Peel ◽  
Recycled Plastics ◽  
Almost All

Everyday human life cannot be separated from plastic. Almost all objects that are around us are made of plastic. In general, plastics are non-biodegradable, causing environmental problems caused by the increased volume of plastic waste. One way to overcome this is by recycling existing plastic waste. But the use of recycled plastics is very limited and considered inefficient because the process is more difficult and processing is more expensive than buying new plastic raw materials. Another alternative is to use bioplastics or biodegradable plastic. This plastic is more environmentally friendly because it is biodegradable or easily decomposed by microorganisms. Basically, bioplastics can be made from vegetable starches. In this study we will use starch extracted from banana peel waste as a base material for making bioplastics. In this research, glycerin which is used as a bioplastic adhesive or plasticizer will be used. Whether or not bioplastics depend on the resistance to water, the attractiveness of the bioplastics, the ability of the plastic to be decomposed by microorganisms. From this research, it is expected to produce bioplastics with high water resistance and high tensile strength and easy to decompose microorganisms.

scholarly journals 3D Printing of Continuous Fiber Reinforced Low Melting Point Alloy Matrix Composites: Mechanical Properties and Microstructures

Materials ◽  
2020 ◽  
Vol 13 (16) ◽  
pp. 3463
Author(s):  
Xin Wang ◽  
Xiaoyong Tian ◽  
Lixian Yin ◽  
Dichen Li
Keyword(s):  
Mechanical Properties ◽  
3D Printing ◽  
Matrix Composite ◽  
Raw Materials ◽  
Low Cost ◽  
Metallic Matrix ◽  
Interfacial Microstructure ◽  
Fiber Reinforced ◽  
Continuous Fiber ◽  
Alloy Matrix

A novel 3D printing route to fabricate continuous fiber reinforced metal matrix composite (CFRMMC) is proposed in this paper. It is distinguished from the 3D printing process of polymer matrix composite that utilizes the pressure inside the nozzle to combine the matrix with the fiber. This process combines the metallic matrix with the continuous fiber by utilizing the wetting and wicking performances of raw materials to form the compact internal structures and proper fiber-matrix interfaces. CF/Pb50Sn50 composites were printed with the Pb50Sn50 alloy wire and modified continuous carbon fiber. The mechanical properties of the composite specimens were studied, and the ultimate tensile strength reached 236.7 MPa, which was 7.1 times that of Pb50Sn50 alloy. The fracture and interfacial microstructure were investigated and analyzed. The relationships between mechanical properties and interfacial reactions were discussed. With the optimized process parameters, several composites parts were printed to demonstrate the advantages of low cost, short fabrication period and flexibility in fabrication of complex structures.

Rapid Fabrication of Li2TiO3 Pebbles via Microwave-Induced Combustion Process and 3D Printing

2014 ◽  
Author(s):  
Qilai Zhou ◽  
Yue Gao ◽  
Yang Mou ◽  
Lihong Xue ◽  
Heping Li ◽  
...  
Keyword(s):  
3D Printing ◽  
Raw Materials ◽  
Combustion Process ◽  
Solution Combustion Synthesis ◽  
Computer Assisted ◽  
Average Crystalline Size ◽  
Solution Combustion ◽  
Fusion Reactor Blanket ◽  
Rapid Fabrication ◽  
20 Nm

Li2TiO3 has been recognized as one of the most promising tritium breeding materials for D-T fusion reactor blanket. In this study, ultra-fine Li2TiO3 powder was prepared rapidly by microwave-induced solution combustion synthesis (MSCS) using nitrates of lithium and titanate as raw materials, citric acid as fuel. The as-synthesized Li2TiO3 powder exhibits an average crystalline size as small as 20 nm with uniform distribution. Computer-assisted 3D printing technology was employed to fabricate Li2TiO3 ceramic breeding pebbles. This computer-assisted process is precise, efficient and controllable, which offers an alternative for the mass production of Li2TiO3 pebbles. The pebbles exhibit good sphericity, relatively small grain size, preferable sinterability and crushing load strength.

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