Synthesis and Conductivity Studies of Poly(Methyl Methacrylate) (PMMA) by Co-Polymerization and Blending with Polyaniline (PANi)

Poly(methyl methacrylate) (PMMA) is a lightweight insulating polymer that possesses good mechanical stability. On the other hand, polyaniline (PANi) is one of the most favorable conducting materials to be used, as it is easily synthesized, cost-effective, and has good conductivity. However, most organic solvents have restricted potential applications due to poor mechanical properties and dispersibility. Compared to PANi, PMMA has more outstanding physical and chemical properties, such as good dimensional stability and better molecular interactions between the monomers. To date, many research studies have focused on incorporating PANi into PMMA. In this review, the properties and suitability of PANi as a conducting material are briefly reviewed. The major parts of this paper reviewed different approaches to incorporating PANi into PMMA, as well as evaluating the modifications to improve its conductivity. Finally, the polymerization condition to prepare PMMA/PANi copolymer to improve its conductivity is also discussed.

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Adsorption–Desorption Characteristics of ss-DNA on 2D TpTta-COF Studied by Fluorescently Labeled Oligonucleotides

NANO ◽

10.1142/s1793292021500508 ◽

2021 ◽

pp. 2150050

Author(s):

Zhaoyu Han ◽

Sen Li ◽

Shaoxian Yin ◽

Zhi-Qin Wang ◽

Yanfei Cai ◽

...

Keyword(s):

Chemical Properties ◽

Kinetic Mechanism ◽

Optical Biosensors ◽

Desorption Kinetic ◽

Wide Range ◽

Potential Applications ◽

Fluorescently Labeled Oligonucleotides ◽

Adsorption Desorption ◽

Physical And Chemical ◽

And Chemical Properties

Being the newest member of the 2D materials family, 2D-nanosheet possesses many distinctive physical and chemical properties resulting in a wide range of potential applications. Recently, it was discovered that 2D COF can adsorb single-stranded DNA (ss-DNA) efficiently as well as usefully to quench fluorophores. These properties make it possible to prepare DNA-based optical biosensors using 2D COF. While practical analytical applications are being demonstrated, the fundamental understanding of binding between 2D COF and DNA in solution received relatively less attention. In this work, we carried out a systematic study to understand the adsorption and desorption kinetic, mechanism, and influencing factors of ss-DNA on the surface of 2D COF. We demonstrated that shorter DNAs are adsorbed more rapidly and bind more tightly to the surface of 2D COF. The adsorption is favored by a higher pH. The different buffer types also can affect the adsorption. In Tris-HCl solution, the adsorption reached highest efficiency. By adding the complementary DNA (cDNA), desorption of the absorbed DNA on 2D COF can be achieved. Further, desorption efficiency can also be exchanged by various surfactant in solution. These findings are important for further understanding of the interactions between DNA and COFs and for the optimization of DNA and COF-based devices and sensors.

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An emerging Janus MoSeTe material for potential applications in optoelectronic devices

Journal of Materials Chemistry C ◽

10.1039/c9tc03936h ◽

2019 ◽

Vol 7 (39) ◽

pp. 12312-12320 ◽

Cited By ~ 14

Author(s):

Xiaoyong Yang ◽

Deobrat Singh ◽

Zhitong Xu ◽

Ziwei Wang ◽

Rajeev Ahuja

Keyword(s):

First Principles ◽

Transition Metal Dichalcogenides ◽

Chemical Properties ◽

Detailed Comparison ◽

Physical And Chemical Properties ◽

First Principles Calculations ◽

Potential Applications ◽

Metal Dichalcogenides ◽

Physical And Chemical ◽

And Chemical Properties

Motivated by the extraordinary physical and chemical properties of Janus transition-metal dichalcogenides (TMDs) due to the change of the crystal field originating from their asymmetry structures, the electronic and optical properties of the MoSeTe monolayer in 2H and 1T phases are systematically studied by first-principles calculations, and a detailed comparison with the parental MoSe2 and MoTe2 monolayer is made.

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Synthesis and applications of carbon nanofibers: a review

Reviews in Chemical Engineering ◽

10.1515/revce-2018-0021 ◽

2020 ◽

Vol 36 (4) ◽

pp. 493-511 ◽

Cited By ~ 5

Author(s):

Juan C. Ruiz-Cornejo ◽

David Sebastián ◽

Maria J. Lázaro

Keyword(s):

Fuel Cell ◽

Carbon Nanofibers ◽

Storage Systems ◽

Chemical Properties ◽

Catalytic Decomposition ◽

Physical And Chemical Properties ◽

Potential Applications ◽

Catalytic Supports ◽

Physical And Chemical ◽

And Chemical Properties

AbstractCarbon nanofibers (CNFs) have shown great potential in multiple applications. Their versatility is derived from the possibility of tuning their physical and chemical properties. CNFs can be synthesized using two main methods: the catalytic decomposition of carbon precursors or the electrospinning and carbonization of polymers. The most appropriate method relies on the desired characteristics of the CNFs. Some of their applications include the synthesis of catalysts and catalytic supports, as electrodes for fuel cell devices, in hydrogen storage systems, and in functional nanocomposites. In this review, recent advances in the synthesis and potential applications of CNFs are examined.

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Graphene Research in China

MRS Proceedings ◽

10.1557/opl.2013.185 ◽

2013 ◽

Vol 1505 ◽

Cited By ~ 1

Author(s):

Kexin Chen

Keyword(s):

Chemical Properties ◽

Chemical Vapor ◽

Dimensional Structure ◽

Chemical Vapor Deposition Growth ◽

Wide Range ◽

The Status ◽

Potential Applications ◽

Number Of Publications ◽

Physical And Chemical ◽

And Chemical Properties

ABSTRACTGraphene, a monolayer of sp2-bonded carbon atoms, has been attracting worldwide interests because of its unique two-dimensional structure, various fascinating properties and a wide range of intriguing potential applications. The graphene research is very active in China and has been developing rapidly in the past few years, which covers nearly all the areas related to graphene including theories, synthesis, physical and chemical properties, and applications. Over 100 research institutions have been involved in graphene research with fast-growing project supports. In this paper, the status of graphene research in China is first discussed based on the number of publications and patents as well as the institutions involved. Then the projects and fundings from both government and companies for graphene research are briefly introduced. Finally, the highlights of graphene research in China are reviewed, which include chemical vapor deposition growth and transfer, mass production, and assembly of graphene, and its applications in energy storage, sensing, composites and solar cells.

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OPTIMISATION OF A RESIN-COATED CHROMITE SAND FOR RAPID SAND CASTING APPLICATIONS

The South African Journal of Industrial Engineering ◽

10.7166/32-3-2665 ◽

2021 ◽

Vol 32 (3) ◽

pp. 290-298

Author(s):

Neo Tshabalala ◽

Kasongo Nyembwe ◽

Malan Van Tonder

Keyword(s):

Three Dimensional ◽

Chemical Properties ◽

Cost Effective ◽

Sand Casting ◽

Raw Material ◽

Silica Sand ◽

Three Dimensional Printing ◽

Physical And Chemical ◽

Dimensional Printing ◽

And Chemical Properties

Applications of three-dimensional printing (3DP) to sand casting have been well-established in the last two decades. The preferred raw material is silica (quartz) sand, as it is the most readily available and cost effective sand. However, silica sand as a refractory material has some technical limitations, including high thermal linear expansion, low refractoriness, and thermal conductivity. Therefore, it is not suitable for all castings. Other refractory sand types are available, including chromite sand, which is abundantly available in South Africa. Analysis of the physical and chemical properties of in-laboratory coating of a locally available chromite sand was conducted through known metal foundry tests that provide an understanding of the quality and suitability of the use of chromite sand as a potential substitute for silica material for rapid sand-casting applications. The results of this study will inform the industry about the optimisation of parameters for the manufacturing of a resin-coated chromite sand and its use in additive manufacturing using a Voxeljet VX 1000 printer.

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Electrochemical Deposition of Platinum Interconnects on Flexible Biocompatible Substrates

MRS Proceedings ◽

10.1557/opl.2014.45 ◽

2014 ◽

Vol 1626 ◽

Cited By ~ 1

Author(s):

A. Radisic ◽

B. M. Morcos ◽

M. Op de Beeck ◽

J. M. O’Callaghan ◽

C. Van Hoof

Keyword(s):

Electrochemical Deposition ◽

Chemical Properties ◽

Impurity Content ◽

Cost Effective ◽

Flexible Substrates ◽

Optimal Conditions ◽

Good Adhesion ◽

Pt Films ◽

Physical And Chemical ◽

And Chemical Properties

ABSTRACTWe explored the use of galvanostatic electrochemical deposition of Pt for cost-effective fabrication of interconnects in flexible implantable bio-medical devices. Initial studies were done on coupons diced from 200 mm Si wafers coated with PVD TiN. Based on the physical and chemical properties of the electrodeposited Pt films, optimal conditions were chosen for through-mask plating of centimeters long Pt lines on flexible, medical grade, releasable polyimide layers. Possibility for further up-scaling was considered with special emphasis on high throughput manufacturing of Pt interconnects with good adhesion to TiN/flexible substrates, low impurity content and resistivity, and acceptable roughness and uniformity.

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Gate-controlled Ambipolar Transport in b-AsP Crystal and Its VIS-NIF Photodetection

Nanoscale ◽

10.1039/d1nr01715b ◽

2021 ◽

Author(s):

Mianzeng Zhong ◽

Haotong Meng ◽

Zhihui Ren ◽

Le Huang ◽

Juehan Yang ◽

...

Keyword(s):

Chemical Properties ◽

Black Phosphorus ◽

Physical And Chemical Properties ◽

Two Dimensional ◽

Layered Semiconductor ◽

Potential Applications ◽

Physical And Chemical ◽

Ambipolar Transport ◽

And Chemical Properties

As a new two-dimensional elemental layered semiconductor, black phosphorus (b-P) has received tremendous attentions due to its excellent physical and chemical properties, and has potential applications in the fields of...

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Two-Dimensional Platinum Diselenide: Synthesis, Emerging Applications, and Future Challenges

Nano-Micro Letters ◽

10.1007/s40820-020-00515-0 ◽

2020 ◽

Vol 12 (1) ◽

Author(s):

Youning Gong ◽

Zhitao Lin ◽

Yue-Xing Chen ◽

Qasim Khan ◽

Cong Wang ◽

...

Keyword(s):

Chemical Properties ◽

Research Community ◽

Physical And Chemical Properties ◽

Two Dimensional ◽

Structure Characteristics ◽

The Past ◽

Future Challenges ◽

Potential Applications ◽

Physical And Chemical ◽

And Chemical Properties

AbstractIn recent years, emerging two-dimensional (2D) platinum diselenide (PtSe2) has quickly attracted the attention of the research community due to its novel physical and chemical properties. For the past few years, increasing research achievements on 2D PtSe2 have been reported toward the fundamental science and various potential applications of PtSe2. In this review, the properties and structure characteristics of 2D PtSe2 are discussed at first. Then, the recent advances in synthesis of PtSe2 as well as their applications are reviewed. At last, potential perspectives in exploring the application of 2D PtSe2 are reviewed.

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Development and application of synthetic NP dispersions to prevent and extinguish forest and peat fires (Review)

ПОЖАРОВЗРЫВОБЕЗОПАСНОСТЬ ◽

10.22227/pvb.2020.29.06.5-27 ◽

2021 ◽

Vol 29 (6) ◽

pp. 5-27

Author(s):

V. V. Bogdanova ◽

O. I. Kobets

Keyword(s):

Chemical Properties ◽

Cost Effective ◽

Physical And Chemical Properties ◽

Synthetic Compound ◽

Fire Extinguishing ◽

Weather Resistance ◽

Physical And Chemical ◽

Forest Combustible ◽

And Chemical Properties ◽

Combustible Materials

Introduction. The analysis of flame retardants and extinguishing agents used for preventing and extinguishing fires in an ecosystem is carried out. It is shown that at present there are no weatherproof, environmentally friendly and cost effective extinguishing agents capable of stopping wood and peat burning. Purpose and objectives. Development of cost effective and environmentally friendly synthetic agents capable of both flame retarding and extinguishing natural combustible materials. Materials and methods. Synthetic dispersions of ammonium phosphates of two- and three-valence metals, as well as wood and peat fireproofed by them are the object of the study. Physical and chemical properties of synthesis products in comparison with their fire retarding efficiency are examined. Fireproofing, fire extinguishing, as well as physical and chemical properties of synthesized products are determined using GOST-regulated methods of thermal and chemical analysis, scanning electron microscopy and original methods. Results and discussion. The formulation of Kompleksil synthetic compound effective in extinguishing and fireproofing wood and peat is optimized using a full factorial experiment. At the same time, the inflow of volatile nitrogen containing products into the gaseous phase is identified as the dominating burning inhibition process common for natural combustible materials. The weather resistance (preservation of fireproof properties in respect of forest combustible materials at 79 mm precipitation), forest and environment enhancement (improvement of mineral nutrition conditions and growth of forest plant communities) properties of Kompleksil compound are identified. Conclusions. A cost effective synthetic compound based on natural mineral materials showing fireproofing and extinguishing efficiency when protecting forest combustible materials and peat is developed. This compound was tested in the process of extinguishing real wildfires; its weather resistance is identified, and the positive response of forest plant communities to the application of this multiple action compound is registered. The use of Kompleksil allows to reduce time expenditures and fire extinguishing agent consumption when extinguishing wildfires, which significantly reduces material damage.

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