scholarly journals Transition to biodegradable composites as a method for solving environmental problems

2020 ◽  
Vol 221 ◽  
pp. 01004
Author(s):  
Gulnaz Sabirova ◽  
Ruslan Safin ◽  
Shamil Mukhametzyanov ◽  
Nour Galyavetdinov
Keyword(s):  
Composite Materials ◽  
Impact Strength ◽  
Negative Impact ◽  
Positive Impact ◽  
Raw Materials ◽  
Polymeric Materials ◽  
Thermal Modification ◽  
Polymer Materials ◽  
Necessary Condition ◽  
Plant Raw Materials

In environmental matters, one of the most pressing problems is the efficient disposal of polymeric materials that have a negative impact on the ecology of soils and oceans. A necessary condition for the sustainable development of industrial production and processing of polymer products is the transition to polymer materials based on renewable plant raw materials, in particular polylactides, polyhydroalkanates, etc. However, the technology for the production of these types of polymers is seriously inferior to synthetic polymers in the field of energy engineering. In this regard, research in the field of creating composite materials by introducing wood filler is currently particularly relevant. This research covers the results of stress-strain behavior of wood filled polylactic wood powder composite materials thermally modified by high temperatures ranged from 200 to 240 °С. Wood impact strength dependence is defined and static bending and composite density dependence on wood filler quantity and the temperature of its thermal modification is also established. It was specified that with the increasing of filler densification and its thermal treatment, the wood impact strength and composite density is decreasing, while with the reduced content of binding, the thermal modification of 200 °С has a positive impact on bending elastic coefficient. The conducted research allows identifying rational areas of use of composite materials as an effective factor in managing natural resources.

The Use of Composite Polymeric Materials to Increase the Effectiveness of Ship Ventilation Systems

2020 ◽  
Vol 869 ◽  
pp. 1-6
Author(s):  
Gia Viet Ngo
Keyword(s):  
Composite Materials ◽  
Negative Impact ◽  
Polymeric Materials ◽  
Polymer Materials ◽  
Production Waste ◽  
Waste Generation ◽  
Composite Polymer ◽  
Research Results ◽  
Technological Processes ◽  
Ventilation Systems

The article presented the use of composite polymeric materials to increase the effectiveness of ship ventilation systems in the process of its machining. As the result of the research, the author considered that, it is important to evaluate and anticipate all possible factors (technical, technological, ergonomic, environmental) associated with the negative impact of excessive production waste generation (chips and dust) in the workplace at the design stages of technological processes for machining parts made of composite materials. The research results determined the possibility of using composite polymer materials for manufacturing the structures of ship ventilation systems, as well as other ship systems.

Optimizing environmental expenditures for maximizing economic performance

2016 ◽  
Vol 54 (10) ◽  
pp. 2544-2561 ◽  
Author(s):  
Nitish Singh ◽  
Jieqiong Ma ◽  
Jie Yang
Keyword(s):  
Economic Performance ◽  
Negative Impact ◽  
Positive Impact ◽  
Raw Materials ◽  
Pollution Prevention ◽  
Global Reporting Initiative ◽  
Resource Based View ◽  
Content Type ◽  
Product Stewardship ◽  
New Perspective

Purpose Corporate environmental expenditure has been a growing concern in recent years, yet mixed findings exist regarding its economic impact. The purpose of this paper is to explain the mixed relationship between environmental expenditure and economic performance from the natural-resource-based view. Design/methodology/approach Using Global Reporting Initiative survey data from 120 firms in 30 countries, this study uses PROCESS, a path-based analysis software, to test the moderation and mediation hypotheses in an integrated analytical model. Findings The findings show that environmental expenditure has a negative impact on economic performance through pollution prevention capability. In contrast, environmental expenditure has a positive impact on economic performance through product stewardship capability. Both effects are significantly strengthened when the firm is located in an environmentally munificent country. Practical implications This study intends to inform firm managers, especially those in environmentally munificent countries, to relocate their environmental expenditure to enhance firms’ economic performance. In particular, firms should focus more on the reduction of input, such as raw materials, energy, and water, instead of output, including emissions, effluents, and wastes. Originality/value The contrasting indirect effects of pollution prevention and product stewardship offer a viable explanation for the mixed findings in the existent literature on environmental expenditure from a new perspective.

scholarly journals Flame Retardancy of Biobased Composites—Research Development

Materials ◽  
2020 ◽  
Vol 13 (22) ◽  
pp. 5253
Author(s):  
Anna Sienkiewicz ◽  
Piotr Czub
Keyword(s):  
Composite Materials ◽  
Flame Retardants ◽  
Mechanical Performance ◽  
Raw Materials ◽  
Diphenyl Ether ◽  
Polymeric Materials ◽  
Polyamide 11 ◽  
Adverse Health Effects ◽  
Advantages And Disadvantages ◽  
Flame Retardation

Due to the thermal and fire sensitivity of polymer bio-composite materials, especially in the case of plant-based fillers applied for them, next to intensive research on the better mechanical performance of composites, it is extremely important to improve their reaction to fire. This is necessary due to the current widespread practical use of bio-based composites. The first part of this work relates to an overview of the most commonly used techniques and different approaches towards the increasing the fire resistance of petrochemical-based polymeric materials. The next few sections present commonly used methods of reducing the flammability of polymers and characterize the most frequently used compounds. It is highlighted that despite adverse health effects in animals and humans, some of mentioned fire retardants (such as halogenated organic derivatives e.g., hexabromocyclododecane, polybrominated diphenyl ether) are unfortunately also still in use, even for bio-composite materials. The most recent studies related to the development of the flame retardation of polymeric materials are then summarized. Particular attention is paid to the issue of flame retardation of bio-based polymer composites and the specifics of reducing the flammability of these materials. Strategies for retarding composites are discussed on examples of particular bio-polymers (such as: polylactide, polyhydroxyalkanoates or polyamide-11), as well as polymers obtained on the basis of natural raw materials (e.g., bio-based polyurethanes or bio-based epoxies). The advantages and disadvantages of these strategies, as well as the flame retardants used in them, are highlighted.

scholarly journals An Overview of the Main Trends in the Creation of Biodegradable Polymer Materials

2021 ◽  
Vol 2021 ◽  
pp. 1-15
Author(s):  
Irina N. Vikhareva ◽  
Evgeniya A. Buylova ◽  
Gulnara U. Yarmuhametova ◽  
Guliya K. Aminova ◽  
Aliya K. Mazitova
Keyword(s):  
Raw Materials ◽  
Polymeric Materials ◽  
Polymer Materials ◽  
New Approach ◽  
Renewable Raw Materials ◽  
Biodegradable Composite ◽  
Operational Characteristics ◽  
Technical Solutions ◽  
Further Development ◽  
Degradation Time

Plastic is one of the most demanded materials on the planet, and the increasing consumption of which contributes to the accumulation of significant amounts of waste based on it. For this reason, a new approach to the development of these materials has been formed: the production of polymers with constant operational characteristics during the period of consumption and capable of then being destroyed under the influence of environmental factors and being involved in the metabolic processes of natural biosystems. The paper outlines the prerequisites for the development of the field of creating biodegradable composite materials, as well as the main technical solutions for obtaining such polymeric materials. The main current solutions for reducing and regulating the degradation time of polymer materials are presented. The most promising ways of further development of the field of bioplastics production are described. Common types of polymers based on renewable raw materials, composites with their use, and modified materials from natural and synthetic polymers are considered.

scholarly journals The effect of Covid-19 on the economy of Bangka-Belitung and the performance of MSME and its impact on competitive strategies in the new normal era

2020 ◽  
Vol 1 (1) ◽  
pp. 51-63
Author(s):  
Reniati Reniati ◽  
◽  
Muhammad Faisal Akbar ◽  
Nur Ahmad Ricky Rudianto ◽  
◽  
...  
Keyword(s):  
Negative Impact ◽  
Positive Impact ◽  
Raw Materials ◽  
Economic Losses ◽  
Change Strategies ◽  
Competitive Strategies ◽  
Online Application ◽  
The Face ◽  
Cross Tabulation ◽  
And Performance

Purpose: The economy in the MSME sector is experiencing a great crisis in the face of the Covid-19 pandemic. MSME actors must change strategies to adapt to the current pandemic conditions. The purpose of this study was to examine the effects of Covid 19 on the economy and performance of MSMEs as well as the strategies adopted by MSME players in Bangka Belitung Province. Research methodology: The data collection method employed probability sampling with google form media analyzed by using cross tabulation, trend analysis and simple mathematical modeling in projecting total economic losses to MSMEs that are active in the Bangka Belitung Island Province. Results: The results show that 84.7 percent of MSMEs experienced a negative impact due to the Covid 19 pandemic in the form of a decrease in sales turnover, reduced demand and hampered distribution of raw materials. However, 15.3 percent of MSMEs experienced a positive impact and survived in the Covid 19 pandemic conditions. Some of the strategies implemented by MSMEs to survive in the Covid 19 periods were replacing products sold with products for handling COVID 19 such as masks, hand sanitizers and others. MSME players also changed their sales strategy by selling online and maintaining customer databases. Limitation: Due to the Covid-19 condition, survey activities were carried out by using the Google Form online application. Contribution: MSMEs undertook a more aggressive marketing strategy to maintain turnover value in order to keep growing. Keywords: Covid-19, MSME, Turnover, Competitive strategy

scholarly journals Economic-mathematical model of obtaining commodity products of the green construction department of the Krasnoyarsk city

2021 ◽  
Vol 875 (1) ◽  
pp. 012056
Author(s):  
N Haydenok ◽  
V Chumakov ◽  
N Yakovenko
Keyword(s):  
Organic Waste ◽  
Optimization Problem ◽  
Negative Impact ◽  
Raw Materials ◽  
Economic Effect ◽  
Green Building ◽  
Environmental Safety ◽  
Plant Raw Materials ◽  
Effective System ◽  
The Cost

Abstract The article deals with the possibility of obtaining marketable products from plant raw materials obtained as a result of urban landscaping and gardening in Krasnoyarsk. The aim of this scientific research is to create an effective system of recycling environmentally friendly organic waste, and thus to reduce the negative impact on the environment and ensure environmental safety. The material of the research is organic waste from pruning of trees, bushes and lawn mowing, as well as means of production for their processing. A linear programming method was used in the work. Solving the posed optimization problem according to the chosen criteria and established systems of restrictions, we will receive either the maximum income, or the minimum costs, or the maximum productivity. It is realistic to formulate the optimization problem seasonally. Economic effect is achieved by reducing the cost of landfill disposal and obtaining a profit from the sale of commercial products made from green organic waste. The project is planned to be implemented on the basis of Krasnoyarsk municipal enterprise “Green Building Department”. The prospect of this research is to reduce the amount of waste by maximising recycling and incorporating it into the economy.

scholarly journals NMR Fingerprint Comparison of Cultivated Sideritis spp. from Cyprus

Agronomy ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1503
Author(s):  
Ekaterina-Michaela Tomou ◽  
Krystalia Lytra ◽  
Antonios Chrysargyris ◽  
Nikolaos Tzortzakis ◽  
Helen Skaltsa
Keyword(s):  
Positive Impact ◽  
Raw Materials ◽  
Research Work ◽  
Herbal Medicines ◽  
2D Nmr ◽  
Medicinal And Aromatic Plants ◽  
Plant Raw Materials ◽  
Chemical Fingerprints ◽  
Cultivation Practices ◽  
Nmr Methods

Medicinal and Aromatic Plants (MAPs) play an essential role in global health systems, since more than 80% of population use natural products in primary healthcare. Given that the global use of herbal medicines is exponentially increasing, as well as many MAPs products are introduced into the market, many cultivation practices are applied to produce high quality and standardized plant raw materials. Thus, the present study focuses on the chemical fingerprints of two cultivated Sideritis species. In Cyprus, Sideritis cypria Post and S. perfoliata L. subsp. perfoliata are widely used in traditional medicine. To date, there is no research work presenting the comparative chemical profiling between the aforesaid species using NMR methods. In this study, 1D and 2D NMR experiments were used to compare the chemical fingerprints of these species originated from conventional cultivation practices. Iridoids (ajugol, monomelittoside, and melittoside) and one flavone (4′-methyl-isoscutellarein 7-O-[6‴-O-acetyl]-β-D-allosyl(1→2)glucoside) were present in the infusion of S. perfoliata subsp. perfoliata. The phenylethanoid glycoside, acteoside, was detected in both samples. The phytochemical profiles of these cultivated species were similar to those of Sideritis species, indicating the positive impact of cultivation practices in MAPs.

scholarly journals Comparison of Quantitative Changes after passing the Laser Beam through Polymeric Material

2019 ◽  
Vol 290 ◽  
pp. 03007
Author(s):  
Libuše Sýkorová ◽  
Jana Knedlová ◽  
Dagmar Měřínská ◽  
Vladimír Pata
Keyword(s):  
Laser Beam ◽  
Negative Impact ◽  
Polymeric Materials ◽  
Product Performance ◽  
Polymer Materials ◽  
Low Molecular Weight ◽  
X Ray Diffraction ◽  
Molecular Substances ◽  
Quantitative Changes ◽  
Cutting Point

The article focuses on laser machining of various polymeric materials. Specifically, it examines the possibility of undesirable changes in these materials as, due to the concentrated energy of the laser beam, the heat of the material is also transferred to the material near the cutting point and hence to the heat of the cut. Although the polymeric materials do not have a high thermal conductivity, it can be expected that due to the elevated temperature, different structural or chemical changes may occur near the cutting edge. Some high-molecular substances begin to split into low-molecular-weight products, and depolymerisation or degradation of the may occur. All these changes may have a negative impact on the product performance. The “Infrared Vibrational Spectroscopy” and X-ray Diffraction Analysis” were selected for experimental machining and subsequent assessment of possible change in selected polymer materials.

scholarly journals Biodegradable polymer materials and modifying additives: state of the art. Part I

2020 ◽  
Vol 12 (6) ◽  
pp. 320-325
Author(s):  
I.N. Vikhareva ◽  
I.I. Zaripov ◽  
D.F. Kinzyabulatova ◽  
N.S. Minigazimov ◽  
G.K. Aminova
Keyword(s):  
Biodegradable Polymers ◽  
Raw Materials ◽  
Optimal Solution ◽  
Polymeric Materials ◽  
Polymer Materials ◽  
New Approach ◽  
Factors Analysis ◽  
Current State ◽  
Production Capacities ◽  
Further Development

One of the most demanded materials on the planet is plastic, the excellent performance of which contributes to the accumulation of a significant amount of waste on its basis. In this regard, a new approach to the development of these materials has been formed in scientific circles: the production of polymer composites with constant performance characteristics for a certain period and then capable of destruction under the influence of environmental factors. Analysis of the current state of the industry of polymeric materials shows that the most urgent is the use of such classical polymers as polyolefins and polyvinyl chloride. First of all, the optimal solution to this problem due to the lack of a suitable replacement for traditional polymers is the development of composites based on them with the use of biodegradable additives. In this case, a set of problems associated with waste disposal is solved: the decomposition period of the recycled waste is significantly reduced, the territories required for plastic waste are reduced. The paper outlines the preconditions for the emergence and further development of the field of biodegradable polymers. The main quantitative characteristics of the production capacities of manufactured bioplastics by types, regions and industries of application are given. Modern methods of reducing and regulating the degradation time of polymer materials are presented. The main global and domestic manufacturers of biodegradable polymers and their products are listed, as well as a list of the main manufacturers of biodegradable additives for polymeric materials. Modern types of bioplastics based on renewable raw materials, composites with their use, as well as modified materials from natural and synthetic polymers are listed. The main methods for determining the biodegradability of existing bioplastics are described

scholarly journals Effective chemical methods of fire control: new threats and new solutions

2019 ◽  
Vol 89 (5) ◽  
pp. 442-448
Author(s):  
S. D. Varfoloveev ◽  
S. M. Lomakin ◽  
P. A. Sakharov ◽  
A. V. Khvatov
Keyword(s):  
Flame Retardant ◽  
Flame Retardants ◽  
Raw Materials ◽  
Polymeric Materials ◽  
Polymer Materials ◽  
The Novel ◽  
Fire Control ◽  
Renewable Raw Materials ◽  
New Type ◽  
Intumescent Flame Retardants

This paper discusses the prospective flame retardant systems for polymeric materials, while considering the environmental issues they create. Polymer nanocomposites with carbon nano-additives and layered silicates are presented as a new type of flame retardant system which exhibits a synergistic effect flame retardancy for traditional polymer thermoplasts. Particular attention is paid to the novel intumescent flame retardants based on the oxidized renewable raw materials, which can be successfully used in the manufacture of multi-purpose timber construction and polymer materials.

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