scholarly journals Synergistic Effect and Characterization of Graphene/Carbon Nanotubes/Polyvinyl Alcohol/Sodium Alginate Nanofibrous Membranes Formed Using Continuous Needleless Dynamic Linear Electrospinning

Nanomaterials ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 714 ◽  
Author(s):  
Ting-Ting Li ◽  
Yanqin Zhong ◽  
Mengxue Yan ◽  
Wei Zhou ◽  
Wenting Xu ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Synergistic Effect ◽  
Polyvinyl Alcohol ◽  
Sodium Alginate ◽  
Large Scale ◽  
Volume Ratio ◽  
Electrospinning Technique ◽  
Large Scale Preparation ◽  
Scale Preparation ◽  
Nanofibrous Membranes

In this study, a self-made continuous needleless dynamic linear electrospinning technique is employed to fabricate large-scale graphene (Gr)/carbon nanotubes (CNT)/polyvinyl alcohol (PVA)/sodium alginate (SA) nanofibrous membranes. The synergistic effect of Gr and CNT fillers in the PVA/SA membrane is explored in depth by changing the volume ratio (v/v) of Gr and CNT as 10:0, 8:2, 6:4, 4:6, 2:8, and 0:10. Microstructure, functional group, conductivity, and hydrophilicity of PVA/SA/Gr/CNT membranes was characterized. Results show that the linear electrode needleless electrospinning technique can be spun into 200-nm diameter fibers. The PVA/SA/Gr/CNT fibrous membrane has good hydrophilicity and thermal stability. A Gr/CN ratio of 6:4 possessed the optimal synergistic effect, which showed the lowest surface resistivity of 2.53 × 103 Ω/m2. This study will provide a reference for the large-scale preparation of nanofibrous membrane used as a artificial nerve conduit in the future.

Large-Scale Preparation of Carbon Nanotubes via Catalytic Pyrolysis of Phenolic Resin at Low Temperature

2015 ◽  
Vol 64 (3) ◽  
pp. 86-89 ◽  
Author(s):  
Junkai Wang ◽  
Xiangong Deng ◽  
Haijun Zhang ◽  
Feng Cheng ◽  
Faliang Li ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Low Temperature ◽  
Large Scale ◽  
Catalytic Pyrolysis ◽  
Phenolic Resin ◽  
Large Scale Preparation ◽  
Scale Preparation

scholarly journals Femtosecond Laser Irradiation of Carbon Nanotubes to Metal Electrodes

2019 ◽  
Vol 9 (3) ◽  
pp. 476 ◽  
Author(s):  
Jianlei Cui ◽  
Yang Cheng ◽  
Jianwei Zhang ◽  
Huanhuan Mei ◽  
Xuewen Wang
Keyword(s):  
Carbon Nanotubes ◽  
Femtosecond Laser ◽  
Large Scale ◽  
Femtosecond Laser Irradiation ◽  
Electrical Performance ◽  
Metal Electrodes ◽  
Large Scale Preparation ◽  
Scale Preparation ◽  
Electrical Conductors

Carbon nanotubes (CNTs) have excellent performance, which means that they could be better electrical conductors. However, the problem of the connection of CNTs to electrodes limits their application. Particularly, improving connection efficiency while ensuring the quality of the connection is a big challenge, because it is difficult to form Ohmic contact between CNTs and electrodes. To address this issue, we propose the use of a femtosecond laser to irradiate the contact surface between the CNTs and the electrodes to obtain a good connection quality and electrical performance. At the same time, since the laser-induced connection acts on all the contact surfaces in the irradiation area, the connection efficiency can be improved, which provides a new idea for the large-scale preparation of the connection.

Large-Scale Preparation of Solubilized Carbon Nanotubes

2003 ◽  
Vol 15 (17) ◽  
pp. 3256-3260 ◽  
Author(s):  
Yujun Qin ◽  
Luqi Liu ◽  
Jiahua Shi ◽  
Wei Wu ◽  
Jun Zhang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Large Scale ◽  
Large Scale Preparation ◽  
Scale Preparation

Graphene-based three-dimensional hierarchical sandwich-type architecture for high performance supercapacitors

RSC Advances ◽  
2014 ◽  
Vol 4 (17) ◽  
pp. 8466-8471 ◽  
Author(s):  
Yufei Zhang ◽  
Mingze Ma ◽  
Jun Yang ◽  
Wei Huang ◽  
Xiaochen Dong
Keyword(s):  
Carbon Nanotubes ◽  
High Performance ◽  
Large Scale ◽  
Three Dimensional ◽  
Step Method ◽  
Large Scale Preparation ◽  
Sandwich Type ◽  
Scale Preparation

A facile two-step method is developed for large-scale preparation of graphene-based three-dimensional hierarchical sandwich-type architecture (graphene/carbon nanotubes (CNTs)/Mn2O3) for high performance supercapacitor.

Large-scale preparation of dispersive carbon nanotubes by arc-discharge method

1998 ◽  
Vol 41 (4) ◽  
pp. 431-437 ◽  
Author(s):  
Baohe Chang ◽  
Sishen Xie ◽  
Wenzhi Li ◽  
Chaoying Wang ◽  
Weiya Zhou ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Large Scale ◽  
Arc Discharge ◽  
Large Scale Preparation ◽  
Scale Preparation ◽  
Discharge Method

scholarly journals Mass-Production and Characterizations of Polyvinyl Alcohol/Sodium Alginate/Graphene Porous Nanofiber Membranes Using Needleless Dynamic Linear Electrospinning

Polymers ◽  
2018 ◽  
Vol 10 (10) ◽  
pp. 1167 ◽  
Author(s):  
Ting-Ting Li ◽  
Mengxue Yan ◽  
Wenting Xu ◽  
Bing-Chiuan Shiu ◽  
Ching-Wen Lou ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Polyvinyl Alcohol ◽  
Sodium Alginate ◽  
Mass Production ◽  
Large Scale ◽  
Copper Wire ◽  
High Yield ◽  
Scale Preparation ◽  
Nanofiber Membranes ◽  
Porous Nanofiber

The aim of this study was to investigate the feasibility of large-scale preparation of porous polyvinyl alcohol/sodium alginate/graphene (Gr) (Gr-AP) nanofiber membranes using a copper wire needleless dynamic linear electrode electrospinning machine. Furthermore, the effects of Gr concentrations (0, 0.0375, 0.075, 0.25, 0.5, and 0.75 wt.%) on the morphology, electrical, hydrophilicity and thermal properties were evaluated. Results indicate that the dynamic linear electrospun Gr-AP membranes have a high yield of 1.25 g/h and are composed of porous finer nanofibers with a diameter of 141 ± 31 nm. Gr improved the morphology, homogeneity, hydrophobicity and thermal stability of Gr-AP nanofiber membranes. The critical conductive threshold is 0.075 wt.% for Gr, which provides the nanofiber membranes with an even distribution of diameter, an optimal conductivity, good hydrophilicity, appropriate specific surface area and optimal thermal stability. Therefore, needleless dynamic linear electrospinning is beneficial to produce high quality Gr-AP porous nanofiber membranes, and the optimal parameters can be used in artificial nerve conduits and serve as a valuable reference for mass production of nanofiber membranes.

Purification of the Antihemophilic Factor by Gel Filtration on Agarose

1969 ◽  
Vol 22 (03) ◽  
pp. 577-583 ◽  
Author(s):  
M.M.P Paulssen ◽  
A.C.M.G.B Wouterlood ◽  
H.L.M.A Scheffers
Keyword(s):  
Factor Viii ◽  
Plasma Proteins ◽  
Large Scale ◽  
Gel Filtration ◽  
Large Scale Preparation ◽  
Scale Preparation ◽  
Antihemophilic Factor

SummaryFactor VIII can be isolated from plasma proteins, including fibrinogen by chromatography on agarose. The best results were obtained with Sepharose 6B. Large scale preparation is also possible when cryoprecipitate is separated by chromatography. In most fractions containing factor VIII a turbidity is observed which may be due to the presence of chylomicrons.The purified factor VIII was active in vivo as well as in vitro.

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