scholarly journals Composition and Properties of Protective Coatings Made of Biologically-Derived Polyester Reactive Binder

Polymers ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1700
Author(s):  
Szymon Kugler ◽  
Ewa Wierzbicka ◽  
Paula Ossowicz-Rupniewska ◽  
Jakub Łopiński
Keyword(s):  
Chemical Resistance ◽  
Raw Materials ◽  
Protective Coatings ◽  
Developed Countries ◽  
Cross Linking ◽  
Coating Materials ◽  
Ecological Requirements ◽  
Volatile Organic ◽  
Zero Carbon ◽  
Steel Substrates

Biologically derived polymers are a very attractive subject for investigation, due to the strict pro-ecological requirements imposed by developed countries, including zero-waste and zero-carbon policies as well as volatile organic compound (VOC) limits. Synthesis of biologically-derived polyesters from natural rosin and bio-diols, showing softening temperatures suitable for application in VOC-free paints and varnishes, was performed to create a desired, future commercial product, that meet the aforementioned requirements regarding VOC and elimination of petroleum-based raw materials. Prepared polymers were used in the formulation of coating materials whose properties: cross-linking behavior, glass transition temperature, thermal stability, storage modulus, hardness, cupping resistance, adhesion, chemical resistance, gloss, haze, color, and anti-corrosive behavior in the salt chamber were investigated and discussed. As a result, coatings with prepared bio-polyesters contained over 80 wt.% of natural resources and showed competitive/better properties than petroleum-based references. They can be applied in the prototyping of “green” powder paints for the protection of steel substrates from corrosion and aggressive solvents.

scholarly journals Anhydride-Cured Epoxy Powder Coatings from Natural-Origin Resins, Hardeners, and Fillers

Coatings ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 531
Author(s):  
Szymon Kugler ◽  
Paula Ossowicz-Rupniewska ◽  
Ewa Wierzbicka ◽  
Jakub Łopiński
Keyword(s):  
Thermal Stability ◽  
Glass Transition ◽  
Chemical Resistance ◽  
Powder Coating ◽  
Market Force ◽  
Cross Linking ◽  
Powder Coatings ◽  
Natural Origin ◽  
Market Needs ◽  
Steel Substrates

Carbon-neutral policy and technological race on the powder coatings market force to develop more advanced, safer, cheaper, and naturally sourced products. To meet the market needs, powder coating compositions and coatings were prepared from safe and natural-origin hardeners, resins, and fillers prepared from rosin, bio-diols, bio-epichlorohydrin, and halloysite, to investigate their thermal, mechanical, and functional properties in comparison with petroleum-based references: cross-linking behavior, glass transition temperature, thermal stability, hardness, cupping resistance, adhesion, chemical resistance, gloss, color, and anti-corrosive behavior in salt chamber. As a result, compositions containing up to 83 wt.% of natural resources, and showing comparable or better properties, as compared to references, were successfully prepared. Their application includes binders for future ecological powder paints for demanding protection of steel substrates.

scholarly journals Protective paints from natural resources: composition and properties

Polimery ◽  
2021 ◽  
Vol 66 (7-8) ◽  
Author(s):  
Szymon Kugler ◽  
Paula Ossowicz-Rupniewska ◽  
Ewa Wierzbicka ◽  
Jakub Łopiński
Keyword(s):  
Thermal Stability ◽  
Natural Resources ◽  
Renewable Resources ◽  
Climate Changes ◽  
Chemical Resistance ◽  
Protective Coatings ◽  
Reference Sample ◽  
The Other ◽  
Cross Linking ◽  
Glass Transition Temperatures

Climate changes and increasing cost of non-renewable resources cause the growing interest in technical materials prepared from natural resources. To meet this interest, prototype paints from rosin and bio-diols derivatives, and also halloysite, were formulated to check their thermal, mechanical, visual and functional properties, as protective coatings of steel. Prepared materials contained ca. 75 wt.% of natural resources and exhibited considerably better corrosion protection, thermal stability, and also higher glass transition temperatures and hardness, than a commercial petroleum-based reference sample. The other parameters: cross-linking behavior, color, gloss, cupping resistance, adhesion and chemical resistance were within the range that is acceptable for potential users.

UNIDO, Industrial Processing of Natural Resources. New York: United Nations. 1981. viii + 78pp.US $ 5.00. [United Nations Publication Sales No. E. 81. 11 . B.1]

1982 ◽  
Vol 21 (4) ◽  
pp. 329-333
Author(s):  
Rashid Aziz
Keyword(s):  
New York ◽  
United Nations ◽  
Industrial Development ◽  
Raw Materials ◽  
Developed Countries ◽  
Raw Material ◽  
Industrial Processing ◽  
Depth Study ◽  
Manufactured Exports ◽  
Year 2000

The book under review is a concise but fairly in-depth study of the prospects for export diversification from the Less Developed Countries (henceforth labeled as LDCs) particularly to Developed Countries (henceforth labeled as OCs). Given the multiple problems faced by the LOCs in exporting to the OCs - protectionist policies with regards to manufactured exports, volatility of prices obtained for raw material exports, etc. - the study analyses the potential for following an intermediate route. The important issues in the export of semi -processed and wholly processed raw materials are discussed. 111ese issues range from the problems and potentials for the location of processing facilities in the LOCs to the formulation of appropriate policies to encourage an export of processed goods rather than raw materials. Such policies will be useful both in solving the balance of-payments problems of the LDCs and in attaining the goal of the Lima Declaration and Plan of Action on Industrial Development and Co-operation, that called for 2S percent of world industrial production to be located in the LOCs by the year 2000.

Australia—The Hidden Jewel

2018 ◽  
Author(s):  
Mahesh K. Joshi ◽  
J.R. Klein
Keyword(s):  
Natural Resources ◽  
Value Chain ◽  
Global Economy ◽  
Good Governance ◽  
Developing Economies ◽  
Raw Materials ◽  
Manufacturing Sector ◽  
Developed Countries ◽  
The United States ◽  
Dutch Disease

The twenty-first century is being touted as the Asian century. With its stable economy, good governance, education system, and above all the abundant natural resources, will Australia to take its place in the global economy by becoming more entrepreneurial and accelerating its rate of growth, or will it get infected with the so-called Dutch disease? It has been successful in managing trade ties with fast-developing economies like China and India as well as developed countries like the United States. It has participated in the growth of China by providing iron ore and coal. Because it is a low-risk country, it has enabled inflow of large foreign capital investments. A lot will depend on its capability and willingness to invest the capital available in entrepreneurial ventures, its ability to capture the full value chain of natural resources, and to export the finished products instead of raw materials, while building a robust manufacturing sector.

Improving Tribological Characteristics of Hip Prostheses Using Biocompatible Nanocoatings

2013 ◽  
Vol 741 ◽  
pp. 67-72 ◽  
Author(s):  
Gheorghe I. Gheorghe ◽  
Liliana Laura Badita
Keyword(s):  
Hip Prosthesis ◽  
Protective Coatings ◽  
Scratch Resistance ◽  
Hip Prostheses ◽  
Force Microscopy ◽  
Tin Coatings ◽  
Femoral Heads ◽  
Before And After ◽  
Tin Thin Films ◽  
Steel Substrates

Total hip prosthesis (THP) is the most success of the 20th century in orthopaedic biomedical engineering. However due to difficult conditions within the human body its durability is generally limited to 15-16 years. THP is a bio-tribosystem, on which many mechanical, thermal, chemical and biological factors act. This paper presents the results of an analysis regarding the topography and tribological parameters of femoral heads structures before and after TiN coating. We report on the synthesis of TiN thin films on steel substrates by pulsed laser deposition (PLD) method for improving the mechanical characteristics of the structures. Adhesion resistance of the coating on the sub-layer was evaluated by scratching tests accompanied by Optical Microscopy (OM), Atomic Force Microscopy (AFM) and Scanning Electron Microscopy (SEM). As a principal result, this work points out that TiN protective coatings deposited by PLD technique with the maximum number of pulses can represent an alternative technology to ensure adhesion and scratch resistance of TiN coatings on femoral heads.

Development of Resistant Coating Systems Based on Polymer Binders

2014 ◽  
Vol 897 ◽  
pp. 262-265
Author(s):  
Michael Tupý ◽  
Vít Petranek ◽  
Jana Kosíková
Keyword(s):  
Polymer Coating ◽  
Chemical Resistance ◽  
Water Solution ◽  
Coating Materials ◽  
Polymer Binders ◽  
Physical Composition ◽  
Common Substrate ◽  
The Common ◽  
Secondary Materials ◽  
Glass Packaging

The aim of the work was to propose the application for waste secondary materials as filler in polymer coating systems. Authors decided to use two different water-based epoxide binders: Lena N141 and Lena N 121 and the waste suitable materials were chosen by its chemical and physical composition and properties. Used recycled materials were glass of windscreen, glass beads, screen, glass packaging and fluorescent glass. The particle size and scanning of grain were determined. The chemical resistance and the adhesion of coating materials to the common substrate were also tested. The chemical resistance was tested with substances: distilled water, oil, petrol, acetone, 20% water solution of NaCl, 50 % water solution of ethanol, 5 % and 30 % water solution of NaOH a 20 % water solution of H2SO4.

Improving the quality and safety of dairy products by implementing a management system

2021 ◽  
pp. 28-31
Author(s):  
Natalia A. Jurk ◽  
Keyword(s):  
Food Safety ◽  
Management System ◽  
Safety Management ◽  
Quality Management System ◽  
Raw Materials ◽  
Developed Countries ◽  
Control Points ◽  
Quality And Safety ◽  
Critical Control Points ◽  
Safety Risks

In order to achieve a certain level of food production, it is necessary to manage its quality and safety. Currently, the quality management system based on the principles of HACCP is widely recognized and is the only method for ensuring food security in all developed countries. The ultimate goal of this system is to eliminate or reduce any food safety risks by preventing them. During the research, the main, auxiliary raw materials and the finished product were identified; flowcharts for the production of an enriched whey drink were developed. On the basis of the developed block diagrams, an analysis of microbiological, chemical, physical and qualitative hazards was carried out, it was determined which of the hazardous factors are the most critical, can harm health and must be eliminated or reduced to acceptable levels. Based on the analysis of significant hazards using the Decision Tree algorithm, two critical control points (pasteurization and cooling) were established. Measures for the management of critical control points are established in the HACCP plan, which reflects all CCPs of the production process of the research object and actions for monitoring and managing them. The introduction of elements of a food safety management system into practice contributes to the production of safe products of appropriate quality in compliance with applicable requirements and standards.

Monitoring of Chemical Resistance of New Grouting Materials

2021 ◽  
Vol 898 ◽  
pp. 27-33
Author(s):  
Petr Figala ◽  
Rostislav Drochytka ◽  
Vit Černý ◽  
Radek Hermann ◽  
Jiří Kolísko
Keyword(s):  
Fly Ash ◽  
Chemical Resistance ◽  
Raw Materials ◽  
Waste Glass ◽  
Sulphate Solution ◽  
Sulphate Attack ◽  
Glass Waste ◽  
Foundry Sand ◽  
Waste Foundry Sand ◽  
Grouting Materials

This paper deals with the study of chemical resistance of new cement-based grout for invert grouting. The aim of this work is to verify new mixtures with specific admixtures. The study monitors resistance to external sulphate attack. Specimens were placed into sulphate solution 29.8 g∙l-1 (44 g∙l-1 Na2SO4) according to DIN19753 standard. Based on the results gained, new mixtures will be designed and optimized by addition of suitable secondary raw materials (fly ash, waste foundry sand, waste glass, waste filers).

scholarly journals China: investment ambitions, limitations and opportunities

2019 ◽  
Vol 2019 (3) ◽  
pp. 138-157 ◽  
Author(s):  
Serhii Korablin
Keyword(s):  
Raw Materials ◽  
Value Added ◽  
Capital Intensity ◽  
Developed Countries ◽  
Belt And Road Initiative ◽  
Foreign Investments ◽  
Rapid Economic Growth ◽  
Belt And Road ◽  
The One ◽  
The Belt And Road

The article considers financial aspects of the implementation of the People's Republic of China's international initiative of "One Belt, One Way". China's impressive economic success over the last 30 years has shown how it grew into a major global exporter and investor, gaining the second-country status in terms of national GDP and imports. These changes took place against the backdrop of rapid economic growth and deep structural reforms, which were accompanied by increased output and exports of high value-added products. Under these conditions, the country naturally prefers to reorient the global economic system in such a way that it is more conducive to China's economic, financial and political interests. A key practical tool for implementing such a plan is the One Belt, One Way initiative, which is to ensure simultaneous access to (a) Western technologies, (b) global raw materials markets, (c) infrastructure capacities that should maximize the deliveries of Chinese produce to all corners of the world economy. However, such an ambitious plan requires an extraordinary amount of financial resources. Despite China's considerable international reserves (over $3 trillion), its volume is still insufficient to cope with such a task. Moreover, the country itself needs further assimilation of foreign investment and technology due to the relatively low level of capital intensity of its workforce. China will be able to solve this dilemma if it manages to create a system of "counter investment", that is, attraction and absorption of foreign investments from more technologically developed countries, which are denominated in the main reserve currencies, and simultaneously realize their own foreign investments in Yuan, offering their users deliveries of own products of slightly lower technological complexity than those received from foreign investors. This publication was prepared based on the presentation of "The Belt and Road Initiative - A New Shape of Globalization?" presented at the Institute of World Economics and Policy (IWEP) of the Chinese Academy of Social Sciences (CASS) in May 2019 as part of the International Economic and Economic Conference on "Economic and Trade Cooperation under the Belt and Road Initiative: Retrospect and Prospect".

scholarly journals Thermally Assisted Machine Hammer Peening of Arc-Sprayed ZnAl-Based Corrosion Protective Coatings

2021 ◽  
Vol 5 (4) ◽  
pp. 109
Author(s):  
Andreas Wirtz ◽  
Mohamed Abdulgader ◽  
Michael P. Milz ◽  
Wolfgang Tillmann ◽  
Frank Walther ◽  
...  
Keyword(s):  
Residual Stresses ◽  
Protective Coatings ◽  
Fatigue Behavior ◽  
Wind Waves ◽  
Offshore Wind ◽  
Coating Materials ◽  
Corrosive Media ◽  
Machine Hammer Peening ◽  
Hammer Peening ◽  
Compressive Residual Stresses

Structural elements of offshore facilities, e.g., offshore wind turbines, are subject to static and dynamic mechanical and environmental loads, for example, from wind, waves, and corrosive media. Protective coatings such as thermal sprayed ZnAl coatings are often used for protection, mainly against corrosive stresses. The Machine Hammer Peening (MHP) process is an innovative and promising technique for the post-treatment of ZnAl coating systems that helps reducing roughness and porosity and inducing compressive residual stresses. This should lead to an enhancement of the corrosion fatigue behavior. In this paper, the effect of a thermally assisted MHP process was investigated. The softening of the coating materials will have a direct effect on the densification, residual porosity and the distribution of cracks. The investigation results showed the influence of thermally assisted MHP on the surface properties, porosity, residual stresses, and hardness of the post-treated coatings. The best densification of the coating, i.e., the lowest porosity and roughness and the highest compressive residual stresses, were achieved at a process temperature of 300 °C. A further increase in temperature on the other hand caused a higher porosity and, in some cases, locally restricted melting of the coating and consequently poorer coating properties.

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