scholarly journals The Compositions: Biodegradable Material - Typical Resin, as Moulding Sands’ Binders

2015 ◽  
Vol 15 (1) ◽  
pp. 35-40
Author(s):  
K. Major-Gabryś ◽  
St. M. Dobosz ◽  
D. Drożyński ◽  
J. Jakubski
Keyword(s):  
Thermal Deformation ◽  
Thermal Destruction ◽  
Biodegradable Materials ◽  
Biodegradable Material ◽  
Points Of View

Abstract The paper presents possibility of using biodegradable materials as parts of moulding sands’ binders based on commonly used in foundry practice resins. The authors focus on thermal destruction of binding materials and thermal deformation of moulding sands with tested materials. All the research is conducted for the biodegradable material and two typical resins separately. The point of the article is to show if tested materials are compatible from thermal destruction and thermal deformation points of view. It was proved that tested materials characterized with similar thermal destruction but thermal deformation of moulding sands with those binders was different.

scholarly journals The Influence of the Content of Furfuryl Alcohol Monomer on the Process of Moulding Sand's Thermal Destruction

2014 ◽  
Vol 59 (3) ◽  
pp. 1093-1096 ◽  
Author(s):  
St. M. Dobosz ◽  
D. Drożyński ◽  
J. Jakubski ◽  
K. Major-Gabryś
Keyword(s):  
European Union ◽  
Elevated Temperature ◽  
Furfuryl Alcohol ◽  
Thermal Deformation ◽  
Thermal Destruction ◽  
Casting Defects ◽  
The European Union ◽  
Alcohol Content ◽  
Moulding Sand ◽  
The Impact

Abstract The article discusses the issue of the influence of furfuryl alcohol content in resin binders on properties of moulding sand at elevated temperature. Reducing the share of this component - due to the requirements of the European Union regarding its toxicity - may cause a decrease in temperature of moulding sands’ destruction and, consequently, the thermal deformation of moulds and the creation of many casting defects. The study examined the impact of the furfuryl alcohol content of the thermal destruction processes and on the strength of the moulding sand at an ambient temperature and the tendency to thermal deformation.

scholarly journals New Materials in the Production of Moulding and Core Sands

2015 ◽  
Vol 15 (4) ◽  
pp. 25-28
Author(s):  
St. M. Dobosz ◽  
K. Major-Gabryś ◽  
A. Grabarczyk
Keyword(s):  
Thermal Properties ◽  
Bending Strength ◽  
Biodegradable Materials ◽  
Polymeric Binder ◽  
Biodegradable Material ◽  
New Materials ◽  
Biodegradation Rate ◽  
Lower Toxicity ◽  
Synthetic Resins ◽  
Cold Box

Abstract The article shows the influence of environment requirements on changes in different foundry moulding sands technologies such as cold box, self-hardening moulding sands and green sands. The aim of the article is to show the possibility of using the biodegradable materials as binders (or parts of binders’ compositions) for foundry moulding and core sands. The authors concentrated on the possibility of preparing new binders consisting of typical synthetic resins - commonly used in foundry practice - and biodegradable materials. According to own research it is presumed that using biodegradable materials as a part of new binders’ compositions may cause not only lower toxicity and better ability to reclaim, but may also accelerate the biodegradation rate of used binders. What’s more, using some kinds of biodegradable materials may improve flexibility of moulding sands with polymeric binder. The conducted research was introductory and took into account bending strength and thermal properties of furan moulding sands with biodegradable material (PCL). The research proved that new biodegradable additive did not decrease the tested properties.

scholarly journals A retrospective towards a biodegradable material concept for future Indonesian sustainable architecture

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Fermanto Lianto ◽  
Denny Husin ◽  
Clinton Thedyardi ◽  
Mieke Choandi ◽  
Rudy Trisno
Keyword(s):  
Building Materials ◽  
Vernacular Architecture ◽  
Biodegradable Materials ◽  
Biodegradable Material ◽  
Global Development ◽  
Sustainable Architecture ◽  
Developed Country ◽  
Material Development ◽  
Kombucha Tea ◽  
Material Concept

AbstractThe awareness of the negative effect of the intensive usage of synthetic material has led to a significant phenomenon in recent global development. Moving forward to become a fully ready developed country, Indonesia shall move toward a more sustainable architecture for presenting a greener environment. Despite blessed with a distinctive collection of tropical material variants, reflected in its vernacular architecture, advanced material development must be invented to promote more progressive architecture in Indonesia. This research illustrates a new perspective regarding biodegradable material concepts for future Indonesian sustainable architecture. It is produced by respecting local and global development trends by using a bibliographic coupling and experimental methods in the laboratory to contribute to Indonesian sustainable architecture. A retrospective is aimed to highlight Indonesian biodegradable material and Indonesian vernacular architecture potency; it is presented as follows; (1) Understanding local–global trends in biodegradable architecture; (2) Indonesian potency on biodegradable materials; (3) A biodegradable material concept as an alternative perspective for Indonesian sustainable architecture. As a result, a new concept is proposed as an alternative for developing Indonesian biodegradable building materials. A more profound sustainable architecture is expected to engage local craftsmanship while highlighting unique biodegradable materials easily found in the surrounding environment, such as Indonesian Kombucha Tea and Indonesian Coffee.

scholarly journals The Compositions: Biodegradable Material – Synthetic Resins as Moulding Sands Binders

2016 ◽  
Vol 16 (4) ◽  
pp. 75-78
Author(s):  
K. Major-Gabryś ◽  
A. Grabarczyk ◽  
St.M. Dobosz
Keyword(s):  
Thermal Deformation ◽  
Room Temperature ◽  
Bending Strength ◽  
Deformation Curve ◽  
Biodegradable Material ◽  
Technological Properties ◽  
Foundry Industry ◽  
Environmental Requirements ◽  
New Challenges ◽  
The Impact

Abstract Growing emission requirements are forcing the foundry industry to seek new, more environmentally friendly solutions. One of the solutions may be the technologies of preparing moulding and core sands using organic biodegradable materials as binders. However, not only environmental requirements grow but also those related to the technological properties of moulding sand. Advancing automation and mechanization of the foundry industry brings new challenges related to the moulding sands. Low elasticity may cause defects during assembly of cores or moulds by the manipulators. The paper presents the study of flexibility in the room temperature according to new method and resistance to thermal deformation of self-hardening moulding sands with furfuryl resin, containing biodegradable material PCL. The task of the new additive is to reduce the moulding sands harmfulness to the environment and increase its flexibility in the room temperature. The impact of the additive and the effect of the amount of binder on the properties of mentioned moulding sands were analysed. Studies have shown that the use of 5% of PCL does not change the nature of the thermal deformation curve, improves the bending strength of tested moulding mixtures and increases their flexibility at room temperature.

scholarly journals The thermal and structural analysis of new bicomponent binders for moulding sands consisting of furfuryl resin and polycaprolactone (PCL)

2017 ◽  
Vol 62 (1) ◽  
pp. 369-372 ◽  
Author(s):  
K. Major-Gabryś ◽  
A. Bobrowski ◽  
A. Grabarczyk ◽  
St. M. Dobosz
Keyword(s):  
Structural Analysis ◽  
Thermal Destruction ◽  
Biodegradable Materials ◽  
Two Component ◽  
Binder Structure

Abstract The aim of the article is thermal and structural analysis of new two-component binders for foundry moulding sands. The previous research showed the possibility of using biodegradable materials as binders or parts of binders’ compositions for foundry moulding and core sands. This paper is concentrated on estimating the influence of PCL on phenol-furfuryl resin thermal destruction (measured by derivatographic research) and its structure (measured by FTiR technology). The research proved that addition of new biodegradable additive PCL in the amount of 5-15% to the phenol-furfuryl resin doesn’t change the resin thermal destruction course but it results in appearance of a new band in two-component binder structure. What’s more there has been noticed a growth of intensity for band at wavenumber 1730 cm-1 (C = O) with the increasing addition of PCL.

scholarly journals Biodegradable Material Alternatives for Industrial Products and Goods Packaging System

2020 ◽  
Vol 9 (03) ◽  
pp. 15-18
Author(s):  
Dr. Nitin Sherje
Keyword(s):  
Biological System ◽  
Biodegradable Materials ◽  
Biodegradable Material ◽  
Industrial Products ◽  
Packaging System ◽  
Over The Top

Bundling materials for calculated intentions are intended to ensure electrical and electronic items and other delicate purchaser products from harms because of stun and over the top vibrations during dealing with and transportation. There is as of late an expanded worry for the improvement of very much planned as well as practical materials. Material maintainability is frequently connected with the extraction of sustainable assets and removal techniques that would not harm our biological system. In this regard, home-grown agro-squander assets would be a savvy choice to create unimportant and expendable green equipment effortlessly. This article features a portion of the answer utilities or elements of bundling supplies and the financially accessible bundling. The possibility of biodegradable materials including indigenous common strands and a case of totally compostable business bundling substance are illustrated. Fundamental aftereffects of stun padding test on surface-adjusted polypropylene arranged in this investigation demonstrated 20% ideal substance padding are introduced.

scholarly journals Characterization of Sustainable Robotic Materials and Finite Element Analysis of Soft Actuators Under Biodegradation

2021 ◽  
Vol 8 ◽  
Author(s):  
Toshiaki Nagai ◽  
Ashitaka Kurita ◽  
Jun Shintake
Keyword(s):  
Mechanical Properties ◽  
Biodegradable Materials ◽  
Biodegradable Material ◽  
Element Analysis ◽  
Soft Actuator ◽  
Degradation Rates ◽  
Soft Actuators ◽  
And Control ◽  
Good Agreement

Biodegradability is an important property for soft robots that makes them environmentally friendly. Many biodegradable materials have natural origins, and creating robots using these materials ensures sustainability. Hence, researchers have fabricated biodegradable soft actuators of various materials. During microbial degradation, the mechanical properties of biodegradable materials change; these cause changes in the behaviors of the actuators depending on the progression of degradation, where the outputs do not always remain the same against identical inputs. Therefore, to achieve appropriate operation with biodegradable soft actuators and robots, it is necessary to reflect the changes in the material properties in their design and control. However, there is a lack of insight on how biodegradable actuators change their actuation characteristics and how to identify them. In this study, we build and validate a framework that clarifies changes in the mechanical properties of biodegradable materials; further, it allows prediction of the actuation characteristics of degraded soft actuators through simulations incorporating the properties of the materials as functions of the degradation rates. As a biodegradable material, we use a mixture of gelatin and glycerol, which is fabricated in the form of a pneumatic soft actuator. The experimental results show that the actuation performance of the physical actuator reduces with the progression of biodegradation. The experimental data and simulations are in good agreement (R2 value up to 0.997), thus illustrating the applicability of our framework for designing and controlling biodegradable soft actuators and robots.

The Research of Biomass Biodegradable Material Microstructure Impact on Performance

2014 ◽  
Vol 541-542 ◽  
pp. 338-342
Author(s):  
Xiu Jie Jia ◽  
Jian Feng Li ◽  
Fang Yi Li
Keyword(s):  
Impact Resistance ◽  
Three Dimensional ◽  
Raw Material ◽  
Biodegradable Materials ◽  
Material Structure ◽  
Biodegradable Material ◽  
Forming Process ◽  
Molding Process ◽  
Plant Fibers ◽  
Foaming Agent

Green and biodegradable may degrade to the direction of the main purposes for cushion packaging material. This paper the bubble growth mechanism of the material in the molding process, the microstructure of four kinds different foaming agent content of biodegradable materials have been studied by using a scanning electron microscope micro-chemical analysis for plant fibers, starch-based materials, through the foam forming process biomass biodegradable materials research object. The results showed that the biomass material in the biodegradable plant fibers are mutually connected to form a three-dimensional network structure of the cross; foaming agent content of 1.0%, the raw material biodegradable material having a structure with a closed air pockets distributed more evenly, which kind of uniform material structure ensures good impact resistance, rebound and thermal insulation.

COMPARISON OF PLGA, PCL, AND CHITOSAN IN SALIVARY GLAND BRANCHING MORPHOGENESIS

2008 ◽  
Vol 20 (05) ◽  
pp. 287-296 ◽  
Author(s):  
Tsung-Lin Yang ◽  
Ya-Chuan Hsiao ◽  
Tai-Horng Young
Keyword(s):  
Cell Migration ◽  
Salivary Gland ◽  
Glycolic Acid ◽  
Branching Morphogenesis ◽  
Biodegradable Materials ◽  
Type Iii Collagen ◽  
Biodegradable Material ◽  
Salivary Gland Regeneration ◽  
Biodegradable Biomaterials ◽  
Gland Development

Branching morphogenesis is a fundamental morphogenetic process in generating glandular tissues. Although the mechanism of branching morphogenesis has been well-explored in the salivary gland development, its interaction with different biodegradable materials has never been investigated. For the purpose of salivary gland regeneration, recapitulation of morphogenetic processes on biodegradable materials might be requisite. Toward this aim, biodegradable biomaterials including poly-lactic-co-glycolic acid (PLGA), poly-epsilon-caprolactone (PCL), and chitosan were examined in the submandibular gland (SMG) culture systems to elucidate their possible impact on salivary morphogenesis. It was found that when SMG explants were cultured on PLGA and PCL, the explants failed to form well-developed branching phenotypes with limited cell migration (5.6 ± 8.8 μm; 10.0 ± 14.1 μm) and decreasing cell viability (56.9% ± 12.5%; 50.3% ± 8.1%). On the contrary, explants cultured on chitosan showed well-developed branches, which were superior in number to those on the control substrata, without any alteration of the morphogenetic phenotypes. Furthermore, the increased cell migration (267.8 ± 45.2 μm) and explants viability (146.8% ± 18.4%) along with the greater deposition of type III collagen, altogether account for better SMG morphogenesis on chitosan. According to the results, it was found that branching morphogenesis of SMG was affected by different biodegradable materials. Chitosan might be an appropriate biodegradable material for salivary morphogenesis, and has applicable potential in the regeneration of salivary tissue.

High Resolution Specimen Area Imaged Under Negligible Field Aberrations

1970 ◽  
Vol 28 ◽  
pp. 540-541 ◽  
Author(s):  
T. Yanaka ◽  
K. Shirota
Keyword(s):  
High Resolution ◽  
Field Distribution ◽  
Image Space ◽  
Beam Deflection ◽  
Objective Lens ◽  
Resolution Limit ◽  
Leakage Flux ◽  
Specimen Area ◽  
Points Of View ◽  
Aberration Theory

It is significant to note field aberrations (chromatic field aberration, coma, astigmatism and blurring due to curvature of field, defined by Glaser's aberration theory relative to the Blenden Freien System) of the objective lens in connection with the following three points of view; field aberrations increase as the resolution of the axial point improves by increasing the lens excitation (k2) and decreasing the half width value (d) of the axial lens field distribution; when one or all of the imaging lenses have axial imperfections such as beam deflection in image space by the asymmetrical magnetic leakage flux, the apparent axial point has field aberrations which prevent the theoretical resolution limit from being obtained.

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