scholarly journals Effect of Melting–Recycling Cycles and Mechanical Fracture on the Thermoplastic Materials Composed of Thermoplastic Polyurethane and Polypropylene Waste Blends

2020 ◽  
Vol 10 (17) ◽  
pp. 5810
Author(s):  
Ting An Lin ◽  
Jia-Horng Lin ◽  
Limin Bao
Keyword(s):  
Sustainable Development ◽  
Hot Pressing ◽  
Raw Materials ◽  
Thermoplastic Polyurethane ◽  
Test Results ◽  
Mechanical Fracture ◽  
Significant Differentiation ◽  
Pressing Cycle ◽  
Multiple Melting ◽  
Ultimate Purpose

With appropriate conditions, thermoplastic materials possess a good reversible ability. They are prone to exceed the reversibility range when being repeatedly processed as they cannot bear high temperatures. Therefore, this study aims to explore the impacts of the melting–recycling cycles and the presence of a compatibilizer on the omnipresent thermoplastic materials. Additionally, the tensile properties, morphology, and thermal properties are studied. The feasibility of multiple utilizations and differentiation effects are examined afterward. In this study, recycled or mechanically damaged thermoplastic polyurethane (T)/polypropylene (P) waste blends are used as the raw materials for the hot-pressing cycle, while maleic anhydride grafted polypropylene (MA) is used as the compatibilizer, thereby simulating the waste compounds. Next, the T/P/MA blends that undergo post-2nd and post-3rd recycling are evaluated for comprehensive change. The test results indicate that without MA, T/P blends exhibit significant differentiation effects due to an increase in the polypropylene content and multiple melting–recycling cycles. By contrast, the presence of MA mitigates the overall differentiation effect of T/P blends. The ultimate purpose of this study is to treat waste compounds via a simple hot-pressing approach to produce useful materials that can be used again. As a result, this study attenuates the negative influences of plastic waste on the environment while achieving sustainable development.

Sustainable regional development as a problem of managing the socio-economic system

Ergodesign ◽  
2020 ◽  
Vol 2020 (2) ◽  
pp. 58-62
Author(s):  
Alexander Anishenko ◽  
Tatyana Krotenko ◽  
Dmitriy Erokhin
Keyword(s):  
Sustainable Development ◽  
Regional Development ◽  
Economic System ◽  
Raw Materials ◽  
Resource Model ◽  
Systematic Analysis ◽  
Development Control ◽  
Sustainable Regional Development ◽  
Three Factor

A systematic analysis of the concept of "sustainable development of the region" is carried out . The classification of factors that affect the process of sustainable development is given. A three -factor resource model for the formation of sustainable development of the region , including human, financial and raw materials, is described. The necessity of systematic monitoring as an element of regional development control is substantiated.

scholarly journals A New Face of Mining Engineer—International Curricula to Sustainable Development and Green Deal (A Case Study of the Wrocław University of Science and Technology)

2021 ◽  
Vol 13 (3) ◽  
pp. 1393
Author(s):  
Karolina Adach-Pawelus ◽  
Anna Gogolewska ◽  
Justyna Górniak-Zimroz ◽  
Barbara Kiełczawa ◽  
Joanna Krupa-Kurzynowska ◽  
...  
Keyword(s):  
Higher Education ◽  
Sustainable Development ◽  
Raw Materials ◽  
Research Question ◽  
Science And Technology ◽  
Mining Industry ◽  
Mining Engineer ◽  
European Institute ◽  
Innovation And Technology ◽  
Development Goals

The mining industry in the world has undergone a major metamorphosis in recent years. These changes have forced higher education to modify the curricula in a thorough way to meet the mining entrepreneurs’ needs. The paper’s scope is to answer the research question—how to attract students and implement Sustainable Development Goals (SDGs) in higher education in mining engineering? Based on the case of international cooperation carried out at the Faculty of Geoengineering, Mining and Geology of the Wrocław University of Science and Technology (WUST) within the framework of educational projects co-financed by European Institute of Innovation and Technology (EIT) and EIT Knowledge and Innovation Communities Raw Materials (EIT RM), the authors prove that the idea of sustainable development can be introduced into the system of teaching mining specialists at every level of their higher education (engineering and master’s studies), through developing their new competencies, introducing new subjects taking into account innovative solutions and technologies, or placing great emphasis on environmental and social aspects. Examples of new curricula show a good way to change into the new face of a mining engineer.

scholarly journals Green Packaging from Consumer and Business Perspectives

2021 ◽  
Vol 13 (3) ◽  
pp. 1356
Author(s):  
Gonzalo Wandosell ◽  
María C. Parra-Meroño ◽  
Alfredo Alcayde ◽  
Raúl Baños
Keyword(s):  
Sustainable Development ◽  
Raw Materials ◽  
Research Activity ◽  
Word Clouds ◽  
Climate Action ◽  
Green Packaging ◽  
Materials Used ◽  
Societal Challenge ◽  
Corporate Social ◽  
The Impact

Sustainable development is a global objective that aims to address the societal challenge of climate action, the environment, resource efficiency, and raw materials. In this sense, an important strategy is the promotion of green packaging, that is, the use of sustainable materials and designs for the packaging of goods. In recent years, many research works have been published in the specialised area covering the different perspectives and dimensions of green packaging. However, to our knowledge, no previous investigations have analysed the research activity on green packaging from business and consumer perspectives. The present study intends to fill this gap by analysing all of the publications found in the Scopus database with the help of visual analytic tools, including word clouds and Gephi network visualization software. More specifically, our study analyses the impact of green packaging from business and consumer viewpoints, including some specific issues such as the design and materials used in green packaging, green packaging costs, marketing strategies and corporate social responsibility related to green packaging, and the impact of green packaging in waste management, the circular economy, logistics, and supply chain management. The results obtained reveal the growing interest of scholars and researchers in all of these dimensions, as is made patently clear by the increasing number of journal publications in recent years. The practical implications of this study are significant, given the growing awareness among companies and consumers about the importance of the promotion of sustainable development through green packaging alternatives. More specifically, the results of this research could be very useful for all of those agents who are interested in learning about the main lines of research being developed in the field of green packaging.

scholarly journals Effect of Fly Ash on Compressive Strength, Drying Shrinkage, and Carbonation Depth of Mortar with Ferronickel-Slag Powder

2021 ◽  
Vol 11 (3) ◽  
pp. 1037
Author(s):  
Se-Jin Choi ◽  
Ji-Hwan Kim ◽  
Sung-Ho Bae ◽  
Tae-Gue Oh
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Construction Industry ◽  
Bituminous Coal ◽  
Raw Materials ◽  
Drying Shrinkage ◽  
The Other ◽  
Test Results ◽  
Slag Powder ◽  
Ferronickel Slag

In recent years, efforts to reduce greenhouse gas emissions have continued worldwide. In the construction industry, a large amount of CO2 is generated during the production of Portland cement, and various studies are being conducted to reduce the amount of cement and enable the use of cement substitutes. Ferronickel slag is a by-product generated by melting materials such as nickel ore and bituminous coal, which are used as raw materials to produce ferronickel at high temperatures. In this study, we investigated the fluidity, microhydration heat, compressive strength, drying shrinkage, and carbonation characteristics of a ternary cement mortar including ferronickel-slag powder and fly ash. According to the test results, the microhydration heat of the FA20FN00 sample was slightly higher than that of the FA00FN20 sample. The 28-day compressive strength of the FA20FN00 mix was approximately 39.6 MPa, which was higher than that of the other samples, whereas the compressive strength of the FA05FN15 mix including 15% of ferronickel-slag powder was approximately 11.6% lower than that of the FA20FN00 mix. The drying shrinkage of the FA20FN00 sample without ferronickel-slag powder was the highest after 56 days, whereas the FA00FN20 sample without fly ash showed the lowest shrinkage compared to the other mixes.

scholarly journals Fabrication of (SiC-AlN)/ZrB2 Composite with Nano-Micron Hybrid Microstructure via PCS-Derived Ceramics Route

Materials ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 334
Author(s):  
Aidong Xia ◽  
Jie Yin ◽  
Xiao Chen ◽  
Zhengren Huang ◽  
Xuejian Liu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Flexural Strength ◽  
Hot Pressing ◽  
Raw Materials ◽  
Secondary Phase ◽  
Pressing Temperature ◽  
Xrd Pattern ◽  
Mean Grain Size ◽  
The Mean

In this work, a (SiC-AlN)/ZrB2 composite with outstanding mechanical properties was prepared by using polymer-derived ceramics (PDCs) and hot-pressing technique. Flexural strength reached up to 460 ± 41 MPa, while AlN and ZrB2 contents were 10 wt%, and 15 wt%, respectively, under a hot-pressing temperature of 2000 °C. XRD pattern-evidenced SiC generated by pyrolysis of polycarbosilane (PCS) was mainly composed by 2H-SiC and 4H-SiC, both belonging to α-SiC. Micron-level ZrB2 secondary phase was observed inside the (SiC-AlN)/ZrB2 composite, while the mean grain size (MGS) of SiC-AlN matrix was approximately 97 nm. This unique nano-micron hybrid microstructure enhanced the mechanical properties. The present investigation provided a feasible tactic for strengthening ceramics from PDCs raw materials.

Sustainable development and the aspirational male consumer: Tengri, making the case for sustainable luxury

2021 ◽  
Vol 8 (1-2) ◽  
pp. 245-266
Author(s):  
Natascha Radclyffe-Thomas
Keyword(s):  
Sustainable Development ◽  
Raw Materials ◽  
Environmental Issues ◽  
Social Enterprises ◽  
Fashion Industry ◽  
Way Of Life ◽  
Virtuous Cycle ◽  
Slow Fashion ◽  
Brand Heritage

Luxury is an industry that defines its value through the quality of its raw materials, which fosters creativity, elevates artisanship and relies on brand heritage and local production to underpin the provenance of its products and justify its pricing strategy and, as such, can be considered as embodying many of the practices of sustainability. Yet, despite public commitments and pledges for better business, both financial and cultural factors have contributed to a lack of progress in implementing the necessary system changes implied by slow fashion, sustainable development and the circular economy. Social enterprises use business to address social and environmental issues. In Tengri’s case, founder Nancy Johnston was inspired by her experiences travelling with Mongolia’s yak herders where she was confronted with the harshness of the nomadic way of life and threats to its continuing existence. She was driven to action when she juxtaposed these conditions with the promoted glamour of the luxury fashion industry, which relies on supplies of ingredients from just such workers. This article explores how Tengri combines social and environmental awareness with luxury product development incorporating the UN SDGs into a sustainable luxury menswear brand in a virtuous cycle of ethical fashion consumption and production.

Revisiting the Case of China-Measures Involving the Exportation of Various Raw Materials from the perspective of Effectiveness of the Necessity Defence

2013 ◽  
pp. 264-285
Author(s):  
Xiuli Han ◽  
Zhiyi Liu ◽  
Lingzi Liu
Keyword(s):  
Sustainable Development ◽  
Environmental Protection ◽  
Natural Resource ◽  
Raw Materials ◽  
Controversial Issues ◽  
Economic Management ◽  
Management Pattern ◽  
Export Restrictions ◽  
Chinese Scholars ◽  
Gatt 1994

The case of Various Raw Materials has been settled. However, some issues in this case are still popular topics among Chinese scholars. The most controversial issues are whether China is entitled to invoke Article XX of the GATT 1994 to defend its export restrictions and whether China demonstrated its measures consistent with Article XX (b) and (g) of the GATT 1994. This paper points out that the Article XX of GATT 1994 in its essence is extremely difficult to be invoked successfully. What makes it even more difficult is ‘stereotype’ to China’s ‘exceptional circumstances’. In view of ineffectiveness of the necessity defence, changing economic management pattern to achieve sustainable development is the fundamental way to solve the problem of Chinese environmental protection as related to exploitation of natural resource.

scholarly journals Fabrication of Ti3AlC2/Al2O3 nanocomposite by a novel method

2011 ◽  
Vol 43 (3) ◽  
pp. 289-294 ◽  
Author(s):  
J. Zhu ◽  
L. Ye ◽  
F. Wang
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Hot Pressing ◽  
Reaction Path ◽  
Raw Materials ◽  
High Energy ◽  
Good Combination ◽  
High Energy Milling ◽  
Al2o3 Composite ◽  
Novel Method

A Ti3AlC2/Al2O3 nanocomposite was synthesized using Ti, Al, C and TiO2 as raw materials by a novel combination of high-energy milling and hot pressing. The reaction path of the 3Ti-8C-16Al-9TiO2 mixture of powders was investigated, and the results show that the transitional phases TiC, TixAly and Al2O3 are formed in high-energy milling first, and then TixAly is transformed to the TiAl phase during the hot pressing. Finally, a reaction between TiC and TiAl occurs to produce Ti3AlC2 and the nanosized Ti3AlC2/Al2O3 composite is synthesized. The Ti3AlC2/Al2O3 composite possessed a good combination of mechanical properties with a hardness of 6.0 GPa, a flexural strength of 600 MPa, and a fracture toughness (K1C) of 5.8 MPa?m1/2. The strengthening and toughening mechanisms were also discussed.

scholarly journals Mechanical Properties and Microstructural Features using Stone Dust as a Partial Replacement of Sand

2019 ◽  
Vol 8 (6) ◽  
pp. 5232-5237
Keyword(s):  
Mechanical Properties ◽  
Economic Growth ◽  
Sustainable Development ◽  
Compressive Strength ◽  
Flexural Strength ◽  
Natural Resources ◽  
Strength Test ◽  
Partial Replacement ◽  
Test Results ◽  
Stone Dust

Today’s world is always leads to development in technology as well as the economic growth though sometime these will affect the environment badly. That’s why world environmental commission coined the termed called sustainable development where development takes place without hampering the others’ needs. Concrete industry is rapidly growing industry in India which consumes lots of natural resources during the production of concrete. Here Stone dust is used as a sustainable material in place of sand partially. M25 grade of concrete has been chosen for the experiments. Different mechanical properties of concrete like compressive strength, Split tensile, flexural strength etc. and Microstructural features like SEM, EDX have been included in this study. Compressive Strength and flexural strength test results shown the increase in the strength. Sulphate Resistance Properties have been tested by curing the cubes in the MgSO4 solution and increase in weight has been observed. Similarities are found in the SEM pictures

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