Review of fundamentals and applications of polyester nanocomposites filled with carbonaceous nanofillers

2018 ◽  
Vol 35 (1) ◽  
pp. 22-44 ◽  
Author(s):  
Ayesha Kausar
Keyword(s):  
High Performance ◽  
State Of The Art ◽  
Technological Development ◽  
Chemical Properties ◽  
Scientific Development ◽  
Polyester Resins ◽  
Aliphatic Polyesters ◽  
Environmental Features ◽  
Aromatic Polyester ◽  
And Chemical Properties

Polyester is a versatile commercially significant polymer (thermoplastic/thermoset) well-known for its biodegradability and excellent thermal, mechanical, and chemical properties. Synthetic aromatic polyester resins usually have better moisture resistance, nonflammability, liquid crystal, strength, thermal, and environmental features compared with natural/aliphatic polyesters. Nanofillers can reinforce these important polymers to further enhance the final nanocomposite structural and physical characteristics. This review presents research devoted to polyester nanocomposites with essential nanofillers such as; nanodiamond, fullerene, carbon nanotube, graphene, and graphene oxide. High-performance polyester/nanocomposites have been developed based on modified polyester design, nanofiller functionality, and optimized interaction between matrix and nanofiller. This article also presents state-of-the-art technological development in the field of polyester/nanocomposites predominantly in supercapacitors, fuel cells, shape memory materials, electromagnetic shielding materials, textiles, and biomedical appliances. Furthermore, future scenarios in scientific development of these nanocomposites are discussed.

Review of Fabrication Methods of Nanotube / Nanowire Devices

2011 ◽  
Vol 411 ◽  
pp. 427-431 ◽  
Author(s):  
Miao Miao Tan ◽  
Zi Yi Zhang ◽  
Lin Hui Zhao ◽  
Jian Cheng Zhang
Keyword(s):  
Carbon Nanotube ◽  
High Performance ◽  
Chemical Properties ◽  
Research Field ◽  
Nano Materials ◽  
One Dimensional ◽  
Nano Fabrication ◽  
Nano Structures ◽  
Manufacturing Methods ◽  
And Chemical Properties

With the development of nano materials, a novel research field of NEMS forms by combining nano materials, nano-structures and nano fabrication with MEMS. Carbon nanotube (CNT) is a kind of one-dimensional nano structures which has unique mechanical, electrical and chemical properties. Using CNTs, new nano-devices with new principle or high performance would be developed. This paper reviews the assembly methods of one dimensional nanostructure and analyzes the characteristics of various methods, which provides reference for the device manufacturing methods using nanotubes/nanowires.

scholarly journals Recent advances in graphene-based materials for dye-sensitized solar cell fabrication

RSC Advances ◽  
2020 ◽  
Vol 10 (72) ◽  
pp. 44453-44469
Author(s):  
Edigar Muchuweni ◽  
Bice S. Martincigh ◽  
Vincent O. Nyamori
Keyword(s):  
Solar Cell ◽  
High Performance ◽  
Chemical Properties ◽  
Dye Sensitized Solar Cell ◽  
Counter Electrodes ◽  
Dye Sensitized ◽  
Recent Advances ◽  
Solar Cell Fabrication ◽  
Cell Fabrication ◽  
And Chemical Properties

Graphene-based materials can produce high performance and sustainable DSSCs, through tuning of their excellent optoelectronic, mechanical, thermal and chemical properties for use as photoanodes, photosensitizers, electrolytes and counter electrodes.

Effect of Doping of Fe into TiO2 Layer in Fe2O3/TiO2/FTO System for High Performance of Water Splitting

2014 ◽  
Vol 93 ◽  
pp. 82-89 ◽  
Author(s):  
Aryan Azad ◽  
Eul Noh ◽  
Kang Seop Yun ◽  
Hee June Jeong ◽  
Sang Chul Jung ◽  
...  
Keyword(s):  
Metal Oxides ◽  
Water Splitting ◽  
High Performance ◽  
Chemical Properties ◽  
Layer By Layer ◽  
Energy Problem ◽  
Dipping Process ◽  
Promising Solution ◽  
Physical And Chemical ◽  
And Chemical Properties

Hydrogen has unique physical and chemical properties which present benefits and challenges to its successful widespread adoption as a fuel. The photoelectrochemical (PEC) water splitting process with semiconductor metal oxides can be a promising solution to the global energy problem. Although amongst metal oxides Fe2O3 by 2.2 eV bang gap energy is more applicable, for reducing the recombination of electron and hole, Fe was doped into TiO2. In this study Fe2O3/Fe doped TiO2 photocatalysts were compared with Fe-doped TiO2 and TiO2 structures by using layer by layer-self-assemble (LBL-SA) method and dipping process on FTO glass. According to our results the Fe2O3 coated on Fe doped TiO2 /FTO has had best results.

scholarly journals State-of-the-Art Modification of Plastic Aggregates Using Gamma Irradiation and Its Optimization for Application to Cementitious Composites

2021 ◽  
Vol 11 (21) ◽  
pp. 10340
Author(s):  
Heonseok Lee ◽  
Hyeonwook Cheon ◽  
Yonghak Kang ◽  
Seungjun Roh ◽  
Woosuk Kim
Keyword(s):  
Compressive Strength ◽  
Gamma Irradiation ◽  
Performance Improvement ◽  
Mechanical Performance ◽  
State Of The Art ◽  
Chemical Properties ◽  
Polymeric Materials ◽  
Cementitious Composites ◽  
Gamma Irradiated ◽  
And Chemical Properties

In the past few decades, there have been numerous attempts to add plastic aggregates composed of polymeric materials to cementitious composites, either as an alternative to using natural aggregates or as fillers and fibers. However, the addition of plastic aggregates often results in cementitious composites with lower mechanical performance. In this paper, we attempt to address this issue by applying gamma irradiation technology to restore the mechanical performance. We aimed to determine the optimal gamma irradiation and mixing combinations by comparing the experimental results with information summarizing the recent literature related to the use of gamma-irradiated plastic aggregates within cementitious composites. To this end, the effects of changes in the physical and chemical properties of plastics due to irradiation with gamma irradiation on the strength of cementitious composites were evaluated using irradiation doses of 25, 50, 75, and 100 kGy and various plastic materials as key parameters. In the compressive strength test, it was found that adding gamma-irradiated plastic increased the compressive strength of the cementitious composites compared to the nonirradiated plastic. This suggests that the irradiation of plastic aggregates with gamma rays is an effective method to recover some of the strength lost when plastic aggregates are added to cementitious composites. In addition, modifications in the microstructure and chemical properties of the gamma-irradiated plastic were analyzed through SEM and FT-IR analysis, which allowed the determination of the strength enhancement mechanism. The results of this study show the possibility of the state-of-the-art performance improvement method for using plastic aggregate as a substitute for natural aggregate, going further from the plastic performance improvement technology for limited materials and radiation dose presented in previous studies.

scholarly journals Effects of shoot age on biological and chemical properties of red currant (Ribes rubrum L.) cultivars

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Boban S. Djordjevic ◽  
Dejan B. Djurovic ◽  
Gordan D. Zec ◽  
Mekjell O. Meland ◽  
Milica M. Fotiric Aksic
Keyword(s):  
High Performance ◽  
Sugar Content ◽  
Chemical Properties ◽  
Principal Component ◽  
Soluble Solids ◽  
Phenological Data ◽  
Acid Ratio ◽  
Total Anthocyanins ◽  
Red Currant ◽  
And Chemical Properties

AbstractThe aim of this study was to examine the influence of shoot age on biological and chemical properties of 11 red currant cultivars (‘Jonkheer van Tets’, ‘Junifer’, ‘London Market’, ‘Makosta’, ‘Mirana’, ‘Redpoll’, ‘Rolan’, ‘Rondom’, ‘Rovada’, ‘Slovakia’ and ‘Stanza’) with different origins and ripening times. Phenological observations and pomological characteristics were studied and chemical analysis was conducted from 2013 to 2018 at experimental fields near Belgrade, Serbia. The total contents of phenols and anthocyanin were estimated spectrophotometrically, while quantitative analysis of anthocyanin aglycones was done using high-performance liquid chromatography. Three-year-old shoots had an earlier start of all examined phenological stages, better generative potential, higher yields, as well as higher total phenol and vitamin C contents in the fruits, compared with 2-year-old shoots, for all cultivars. The contents of total anthocyanins were higher in berries on younger shoots of early-ripening cultivars, while late-ripening cultivars had higher contents of total soluble solids and cyanidin in the berries on 3-year-old shoots. Principal component analysis demonstrated that the most important variables that distinguished 2-year-old shoots from 3-year-old shoots were those related to phenological data, cluster traits, total acids and yields. According to the obtained results, ‘Junifer’ (with the highest number of clusters), ‘Mirana’ (with the highest sugar content and sugar/acid ratio), ‘Redpoll’ (with the highest physical traits of cluster and berry), ‘Slovakia’ (with the highest yield and yield efficiency) and ‘Rovada’ (with the highest level of secondary metabolites) are recommended as the most promising cultivars for growing in the temperate region of Serbia.

PVD-Hartstoffschichten für Schleifwerkzeuge zum Bearbeiten von Superlegierungen/Wear resistant PVD coatings for cBN grinding tools

2021 ◽  
Vol 111 (06) ◽  
pp. 419-429
Author(s):  
Jörg Hartig ◽  
Benjamin Kirsch ◽  
Jan C. Aurich
Keyword(s):  
Wear Resistance ◽  
State Of The Art ◽  
Cutting Tools ◽  
Chemical Properties ◽  
High Hardness ◽  
Pvd Coatings ◽  
Grinding Wheels ◽  
Property Profile ◽  
Stand Der Technik ◽  
And Chemical Properties

Das Aufbringen von Beschichtungen bei Werkzeugen mit geometrisch bestimmter Schneide gehört seit vielen Jahren zum Stand der Technik. Die Hartstoffschichten werden häufig mittels PVD-Technik auf dem Substrat abgeschieden. Die Schichten zeichnen sich durch eine hohe Härte und Verschleißbeständigkeit, sowie gute tribologische und chemische Eigenschaften aus. Dieses Eigenschaftsprofil bietet somit auch großes Potenzial zur Standzeitverbesserung von thermisch und mechanisch hochbeanspruchten Schleifwerkzeugen bei der Bearbeitung von Superlegierungen. In diesem Beitrag werden unterschiedliche Schichtsysteme auf ihre Anwendbarkeit auf galvanisch gebundene cBN-Schleifwerkzeuge untersucht und diskutiert.   The application of coatings to cutting tools with geometrically defined cutting edge has been state of the art for many years. The coatings are often deposited on the substrate using PVD technology. The coatings are characterized by high hardness and wear resistance as well as good tribological and chemical properties. Therefore, this property profile also offers great potential for improving the tool life of grinding wheels that are subject to high thermal and mechanical stress, especially during grinding difficult to machine materials. In the following article, different coatings are examined and discussed for their applicability to electroplated cBN grinding tools.

High performance graphene embedded rubber composites

RSC Advances ◽  
2015 ◽  
Vol 5 (99) ◽  
pp. 81707-81712 ◽  
Author(s):  
Sung Ho Song ◽  
Jung Mo Kim ◽  
Kwang Hyun Park ◽  
Dong Ju Lee ◽  
O.-Seok Kwon ◽  
...  
Keyword(s):  
High Performance ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Rubber Composites ◽  
Synergy Effects ◽  
Physical And Chemical ◽  
And Chemical Properties

Nano-fillers have provided a big advantage for enhancing the performance of rubber composites through leading the synergy effects in the physical and chemical properties.

New trends in vinyl ester resins

2014 ◽  
Vol 30 (6) ◽  
Author(s):  
Shipra Jaswal ◽  
Bharti Gaur
Keyword(s):  
Corrosion Resistance ◽  
Vinyl Ester ◽  
High Performance ◽  
Addition Reaction ◽  
State Of The Art ◽  
Unsaturated Polyester ◽  
Important Class ◽  
Polyester Resins ◽  
Unsaturated Carboxylic Acids ◽  
Vinyl Ester Resins

AbstractVinyl ester resins (VERs) are high-performance unsaturated resins derived by the addition reaction of various epoxide resins with α-β unsaturated carboxylic acids. These resins have always been classified under unsaturated polyester resins. However, VERs have remarkable corrosion resistance and superior physical properties as compared with these conventional polyester resins, which make VERs a class of their own and hallmark of today’s resin industries. Hence, there is a need to review the available literature on this important class of thermosetting resins separately. In this article, an attempt is made to review the state of the art of VERs, including synthesis, characterization, curing, thermal, chemical, oxidative properties, and applications. The main focus is on the latest developments in this area.

Metal Organic Framework Derived Porous Carbon Materials Excels as an Excellent Platform for High-performance Packaged Supercapacitors

Nanoscale ◽  
2021 ◽  
Author(s):  
Xianyu Chu ◽  
Fanling Meng ◽  
Ting Deng ◽  
Wei Zhang
Keyword(s):  
Porous Carbon ◽  
High Performance ◽  
Metal Organic Framework ◽  
Chemical Properties ◽  
Porous Carbon Material ◽  
Metal Organic ◽  
Key Steps ◽  
Physical And Chemical ◽  
And Chemical Properties ◽  
Organic Framework

Designing and synthesizing new materials with special physical and chemical properties are the key steps to assembling high performance supercapacitors. Metal organic framework (MOF) derived porous carbon material has drawn...

scholarly journals Rapid transformation of heterocyclic building blocks into nanoporous carbons for high-performance supercapacitors

RSC Advances ◽  
2018 ◽  
Vol 8 (22) ◽  
pp. 12300-12309 ◽  
Author(s):  
Babak Ashourirad ◽  
Muslum Demir ◽  
Ryon A. Smith ◽  
Ram B. Gupta ◽  
Hani M. El-Kaderi
Keyword(s):  
Zinc Chloride ◽  
High Performance ◽  
Chemical Properties ◽  
Building Blocks ◽  
Nanoporous Carbons ◽  
Stable Performance ◽  
Supercapacitor Applications ◽  
Rapid Transformation ◽  
And Chemical Properties

Zinc chloride activated benzimidazole derived carbons (ZBIDCs) with optimal textural and chemical properties exhibit remarkable and stable performance in supercapacitor applications.

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