hollow graphene microtubes using polyacrylonitrile

An investigation on structure characterization of thermally

Thermal stabilization of polyacrylonitrile (PAN) precursor fiber was performed with a pretreatment of an aqueous guanidine carbonate solution and its structure was thoroughly characterized using a combination of infrared spectroscopy (IR), differential scanning

The Influence of Graphene Addition on the Properties of Composite rGO PAN Membranes and Their Potential Application for Water Disinfection

functionalized graphene oxide (GO) with siloxanes containing amine groups, and then reduced it and copolymerized with acrylonitrile and acrylamide. The team of Ruiz et al. obtained graphene quantum dots/polyacrylonitrile membranes by electrospinning [19].

Evaluation of a graphene

We studied the scattering and absorption of the H-polarized plane wave by a graphene-covered circular dielectric cylinder and a hollow tube with a graphene cover on the outer boundary in the terahertz range. The analytical solution of the wave-scattering problem was based on the Maxwell equations and the use of the separation of variables in the polar coordinates. We assumed the resistive

Carbon microtubes: tuning internal diameters and

2005/4/15In this paper, we report a synthesis strategy for a new class of hollow, curved carbon morphologies, 'carbon microtubes' (CMTs), with absolute control over their conical angles and internal diameters. Our synthesis methodology employs nitrogen or oxygen dosing to

(19) A self-assembly strategy for fabricating highly stable silicon/reduced graphene oxide anodes for lithium-ion batteries, New Journal of Chemistry, 2016, 1 (20) Bio-inspired hollow activated carbon microtubes derived from willow catkins for supercapacitors with high volumetric performance, Materials Letters, 2016, 4

Carbon Nanotube and Graphene Based Polyamide

Using minimal amounts of CNTs or graphene in a polymer makes the resulting nanocomposites electrically conductive. Conductivity of carbon based nanocomposites increases markedly once the nanofiller content becomes high enough to percolate, that is, to form a connected network that acts as a conductive pathway through the nonconductive polymer matrix [ 33, 34, 43, 49, 69 ].

Carbon microtubes (Patent)

article{osti_1019103, title = {Carbon microtubes}, author = {Peng, Huisheng and Zhu, Yuntian Theodore and Peterson, Dean E and Jia, Quanxi}, abstractNote = {A carbon microtube comprising a hollow, substantially tubular structure having a porous wall, wherein the microtube has a diameter of from about 10 .mu.m to about 150 .mu.m, and a density of less than 20 mg/cm.sup.3.

OPEN Conversionless efficient and broadband laser light diffusers

connected hollow hBN microtubes, with individual features varying in well-defined sizes and dimensions. The as-synthesized hollow hBN microtubes have an average length ~25m, and their diameter, d tube, is between 300 and 3000nm, depending on the

An embryo of protocells: The capsule of graphene with selective ion channels,Scientific Report.10258 (2015) 16.Fangli Fan, Zhi Qin, Jing Bai et al., Rapid removal of uranium from aqueous solutions using magnetic Fe3O4SiO2 compositeparticles, Journal of Environmental Radioactivity, 106(2012):40-46.

Microtubes and hollow microspheres formed by winding

Microtubes and hollow microspheres formed by winding of nanoribbons from self-assembly of tetraphenylethylene amide macrocycles. Song Song Key Laboratory for Large-Format Battery Materials and System, Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.

Conversionless efficient and broadband laser light diffusers for high brightness illumination applications

connected hollow hBN microtubes, with individual features varying in well-defined sizes and dimensions. The as-synthesized hollow hBN microtubes have an average length ~25m, and their diameter, d tube, is between 300 and 3000nm, depending on the

Research Progress in Polyacrylonitrile (PAN) Based

Research Progress in Polyacrylonitrile (PAN) Based Carbon Nanofibers Electrode Materials for Supercapacitor WANG He 1, WANG Hongjie 1, WANG Wenyu 1, JIN Xin 1, LIN Tong 1,2 1 State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387; 2 Australian Future Fibres Research and Innovation Center, Deakin University, Geelong VIC

The controlled synthesis of complex hollow

Nanofibrous hollow microspheres using polyacrylonitrile and Nylon. Nano- and microfabrication technologies. [] micelle or vesicle Rectangular platelet micelles. Fluorescent imaging, sensing, electronics, and catalysis. [] Multi-layered single crystalline Cu 2

The controlled synthesis of complex hollow

Nanofibrous hollow microspheres using polyacrylonitrile and Nylon. Nano- and microfabrication technologies. [] micelle or vesicle Rectangular platelet micelles. Fluorescent imaging, sensing, electronics, and catalysis. [] Multi-layered single crystalline Cu 2

Conversionless efficient and broadband laser light diffusers for high brightness illumination applications

connected hollow hBN microtubes, with individual features varying in well-defined sizes and dimensions. The as-synthesized hollow hBN microtubes have an average length ~25m, and their diameter, d tube, is between 300 and 3000nm, depending on the

IET Digital Library: Hollow carbon microfibres fabricated

A novel method for preparing coaxial polyacrylonitrile (PAN)/polyvinyl pyrrolidone (PVP) microfibres is proposed. Further, the obtained composite fibres are subsequently processed using pre-oxidation and carbonisation treatments in order to obtain hollow carbon

OPEN Conversionless efficient and broadband laser light diffusers

connected hollow hBN microtubes, with individual features varying in well-defined sizes and dimensions. The as-synthesized hollow hBN microtubes have an average length ~25m, and their diameter, d tube, is between 300 and 3000nm, depending on the

Graphene reinforced carbon fibers

The superlative strength-to-weight ratio of carbon fibers (CFs) can substantially reduce vehicle weight and improve energy efficiency. However, most CFs are derived from costly polyacrylonitrile (PAN), which limits their widespread adoption in the automotive industry.

Carbon microtubes: tuning internal diameters and

2005/4/15It has been observed in multi-walled CNTs that graphene sheets slide over one another to accommodate the misfit caused by increase in diameters with the addition of subsequent graphene layers []. TEM investigations performed along a certain length at the tip of the microtubes revealed that the wall tapers down to a few layers of graphene as shown in figure 12 .

Rational Design of Highly Conductive Nitrogen‐Doped

Robust N‐doped crosslinked graphene was grafted on the internal and external walls of carbonized hollow catkin to form a sandwich structure of the derived carbon. The obtained carbon microtubes exhibit a large specific surface area (2608 m 2 g −1), short and

Rheological Behaviors of Graphene

[4] J.H. Yang, S.H. Lin, Y.D. Lee, Preparation and characterization of poly(l-lactide)-graphene composites using the in situ ring-opening polymerization of PLLA with graphene as the initiator, J. Mater. [5] M. Sabzi, L. Jiang, N. Nikfarjam, Graphene nanoplatelets as rheology modifiers for polylactic acid: Graphene aspect-ratio-dependent nonlinear rheological behavior, Ind. Eng. Chem. Res., 54

Hierarchical Tubular Structures Composed of Co3O4 Hollow

Electrospun polyacrylonitrile (PAN)– cobalt acetate (Co(Ac)2) composite nanofibers are selected as the self-engaged templates to provide the cobalt source for the growth of ZIF-67. Next, due to the strong coordination of 2-methylimidazole to cobalt ions within the PAN–Co(Ac)2 nanofibers, a uniform shell of ZIF-67 nanocrystals can be grown on the nanofibers.

The impact of fullerenes on the ordering of

article{osti_1265843, title = {The impact of fullerenes on the ordering of polyacrylonitrile during nanocomposites formation}, author = {Imel, Adam E. and Dadmun, Mark D.}, abstractNote = {The production of polymer nanocomposites from solution consists of the mixing of the polymer and nanoparticle in solution and subsequent evaporation of the solvent.

In Situ Synthesis of Silver Nanoparticles on Amino

2021/2/16In this study, amino hyperbranched polymers (HBP)-grafted polyacrylonitrile (PAN) fiber was prepared through an amidation reaction in an autoclave. The prepared PAN-G-HBP fiber can complex Ag+ through amino groups of amino HBP, and in a hot steaming condition, Ag+ can be converted to Ag0 through the reducibility of HBP. PAN-G-HBP and Ag nanoparticles (NPs)-coated

Effect of Graphene on Sulfur/Polyacrylonitrile

2019/12/1A novel sulfur/polyacrylonitrile/graphene nanocomposite has been synthesized via a simple combination of ballmilling with low temperature heat-treatment. The nanocomposite was examined as a cathode for high performance lithium/sulfur batteries.

Carbon aerogel evolution: Allotrope, graphene

Carbon aerogel evolution: Allotrope, graphene-inspired, and 3D-printed aerogels - Volume 32 Issue 22 I. INTRODUCTION Aerogels cover a class of solid materials distinguished by their extreme low density and ultrafine, open pore structure. Initially synthesized as a

Mauricio Terrones

Hollow "graphene" microtubes using polyacrylonitrile nanofiber template and potential applications of field emission Zeyu Guo, He-Dong Huang, Lixiang Zhong, Ruitao Lv, Zheng-Hong Huang, Jia Li, Nestor Perea-Lopez, Pengyan Yang, Mauricio Terrones, Rodney S. Ruoff, Feiyu Kang

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